https://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&feed=atom&action=historyDetector Rates and Lifetime - Revision history2024-03-29T00:13:45ZRevision history for this page on the wikiMediaWiki 1.24.1https://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=80338&oldid=prevMarki: Text replacement - "http://argus.phys.uregina.ca/cgi-bin/private" to "https://halldweb.jlab.org/doc-private"2017-02-24T20:55:51Z<p>Text replacement - "http://argus.phys.uregina.ca/cgi-bin/private" to "https://halldweb.jlab.org/doc-private"</p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Rate Estimates ==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Rate Estimates ==</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The estimated rates in a given paddle depend on the upstream detector geometry and target material. Some estimates can be found in [<del class="diffchange diffchange-inline">http</del>://<del class="diffchange diffchange-inline">argus</del>.<del class="diffchange diffchange-inline">phys</del>.<del class="diffchange diffchange-inline">uregina.ca</del>/<del class="diffchange diffchange-inline">cgi</del>-<del class="diffchange diffchange-inline">bin/</del>private/DocDB/ShowDocument?docid=1471 GlueX-DB 1471]. In figure 7 on page 9 of this document you find the estimated rates for all paddles with the half sized paddles on the side (41 - 44). The rates for the central paddles are expected to be rather large up to 12 MHz! These are calculations with 6cm wide paddles of 1 inch thickness. Therefore splitting the central paddles in half is a necessity to cut down the rates to a more acceptable level.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The estimated rates in a given paddle depend on the upstream detector geometry and target material. Some estimates can be found in [<ins class="diffchange diffchange-inline">https</ins>://<ins class="diffchange diffchange-inline">halldweb</ins>.<ins class="diffchange diffchange-inline">jlab</ins>.<ins class="diffchange diffchange-inline">org</ins>/<ins class="diffchange diffchange-inline">doc</ins>-private/DocDB/ShowDocument?docid=1471 GlueX-DB 1471]. In figure 7 on page 9 of this document you find the estimated rates for all paddles with the half sized paddles on the side (41 - 44). The rates for the central paddles are expected to be rather large up to 12 MHz! These are calculations with 6cm wide paddles of 1 inch thickness. Therefore splitting the central paddles in half is a necessity to cut down the rates to a more acceptable level.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== PMT specifications ==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== PMT specifications ==</div></td></tr>
</table>Markihttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30987&oldid=prevZihlmann: /* Operating PMT at 0.02mA */2011-10-21T13:58:54Z<p><span dir="auto"><span class="autocomment">Operating PMT at 0.02mA</span></span></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 13:58, 21 October 2011</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><span style="color:#FF0000"><b></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><span style="color:#FF0000"><b></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<del class="diffchange diffchange-inline"><br></del></b></span></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.</b></span><ins class="diffchange diffchange-inline"><br></ins><br></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><br></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>It is estimated that a MIP passing through the center of the paddle will generate in average 2138 photo electrons in the PMT. This corresponds to an average 2.5MeV energy deposition seen by the PMT (after attenuation) determined from Monte Carlo. For the innermost paddle with the highest rate this corresponds to a signal amplitude of 78mV. From this we deduct the PMT gain to be 1.8*10^5. For the next neighbouring paddle we expect a signal amplitude of about 130mV for these events resulting in a gain of 3.0*10^5 and for the first full width paddle and an expected signal amplitude of 208mV a gain of 4.8*10^5 is estimated.<ins class="diffchange diffchange-inline"><br></ins><br></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>It is estimated that a MIP passing through the center of the paddle will generate in average 2138 photo electrons in the PMT. This corresponds to an average 2.5MeV energy deposition seen by the PMT (after attenuation) determined from Monte Carlo. For the innermost paddle with the highest rate this corresponds to a signal amplitude of 78mV. From this we deduct the PMT gain to be 1.8*10^5. For the next neighbouring paddle we expect a signal amplitude of about 130mV for these events resulting in a gain of 3.0*10^5 and for the first full width paddle and an expected signal amplitude of 208mV a gain of 4.8*10^5 is estimated.<br></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The Hamamatsu PMT R9779 8-stage tube has a gain of 5.*10^5 at an operating voltage of 1500 Volts. At the maximum recommended operating voltage of 1750 the gain of the tube is slightly above 1.0*10^6. According to these numbers the 8-stage PMT is what is needed for the central TOF paddles. However this PMT seems to be also sufficient for all other paddles because operating them at a gain of about 5*10^5 provides reasonable large signals according to the above estimates.<br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The Hamamatsu PMT R9779 8-stage tube has a gain of 5.*10^5 at an operating voltage of 1500 Volts. At the maximum recommended operating voltage of 1750 the gain of the tube is slightly above 1.0*10^6. According to these numbers the 8-stage PMT is what is needed for the central TOF paddles. However this PMT seems to be also sufficient for all other paddles because operating them at a gain of about 5*10^5 provides reasonable large signals according to the above estimates.<br></div></td></tr>
</table>Zihlmannhttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30986&oldid=prevZihlmann: /* Operating PMT at 0.02mA */2011-10-21T13:58:15Z<p><span dir="auto"><span class="autocomment">Operating PMT at 0.02mA</span></span></p>
<table class='diff diff-contentalign-left'>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 13:58, 21 October 2011</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br></b></span></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br></b></span></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>It is estimated that a MIP passing through the center of the paddle will generate in average 2138 photo electrons in the PMT. This corresponds to an average 2.5MeV energy deposition seen by the PMT (after attenuation) determined from Monte Carlo. For the innermost paddle with the highest rate this corresponds to a signal amplitude of 78mV. From this we deduct the PMT gain to be 1.8*10^5. For the next neighbouring paddle we expect a signal amplitude of about 130mV for these events resulting in a gain of 3.0*10^5 and for the first full width paddle and an expected signal amplitude of 208mV a gain of 4.8*10^5 is estimated.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>It is estimated that a MIP passing through the center of the paddle will generate in average 2138 photo electrons in the PMT. This corresponds to an average 2.5MeV energy deposition seen by the PMT (after attenuation) determined from Monte Carlo. For the innermost paddle with the highest rate this corresponds to a signal amplitude of 78mV. From this we deduct the PMT gain to be 1.8*10^5. For the next neighbouring paddle we expect a signal amplitude of about 130mV for these events resulting in a gain of 3.0*10^5 and for the first full width paddle and an expected signal amplitude of 208mV a gain of 4.8*10^5 is estimated.<ins class="diffchange diffchange-inline"><br></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">The Hamamatsu PMT R9779 8-stage tube has a gain of 5.*10^5 at an operating voltage of 1500 Volts. At the maximum recommended operating voltage of 1750 the gain of the tube is slightly above 1.0*10^6. According to these numbers the 8-stage PMT is what is needed for the central TOF paddles. However this PMT seems to be also sufficient for all other paddles because operating them at a gain of about 5*10^5 provides reasonable large signals according to the above estimates.<br></ins></div></td></tr>
</table>Zihlmannhttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30923&oldid=prevZihlmann: /* Operating PMT at 0.02mA */2011-10-19T14:17:25Z<p><span dir="auto"><span class="autocomment">Operating PMT at 0.02mA</span></span></p>
<table class='diff diff-contentalign-left'>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 14:17, 19 October 2011</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><span style="color:#FF0000"><b></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><span style="color:#FF0000"><b></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br></b></span<del class="diffchange diffchange-inline">><br</del>></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br></b></span></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>It is estimated that a MIP passing through the center of the paddle will generate in average 2138 photo electrons in the PMT. This corresponds to an average 2.5MeV energy deposition seen by the PMT (after attenuation) determined from Monte Carlo. For the innermost paddle with the highest rate this corresponds to a signal amplitude of 78mV. From this we deduct the PMT gain to be 1.8*10^5. For the next neighbouring paddle we expect a signal amplitude of about 130mV for these events resulting in a gain of 3.0*10^5 and for the first full width paddle and an expected signal amplitude of 208mV a gain of 4.8*10^5 is estimated.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>It is estimated that a MIP passing through the center of the paddle will generate in average 2138 photo electrons in the PMT. This corresponds to an average 2.5MeV energy deposition seen by the PMT (after attenuation) determined from Monte Carlo. For the innermost paddle with the highest rate this corresponds to a signal amplitude of 78mV. From this we deduct the PMT gain to be 1.8*10^5. For the next neighbouring paddle we expect a signal amplitude of about 130mV for these events resulting in a gain of 3.0*10^5 and for the first full width paddle and an expected signal amplitude of 208mV a gain of 4.8*10^5 is estimated.</div></td></tr>
</table>Zihlmannhttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30922&oldid=prevZihlmann: /* Operating PMT at 0.02mA */2011-10-19T14:17:07Z<p><span dir="auto"><span class="autocomment">Operating PMT at 0.02mA</span></span></p>
<table class='diff diff-contentalign-left'>
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr style='vertical-align: top;'>
<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 14:17, 19 October 2011</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 146:</td>
<td colspan="2" class="diff-lineno">Line 146:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><span style="color:#FF0000"><b></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><span style="color:#FF0000"><b></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br></b></span></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br></b></span><ins class="diffchange diffchange-inline"><br></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline"><br></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">It is estimated that a MIP passing through the center of the paddle will generate in average 2138 photo electrons in the PMT. This corresponds to an average 2.5MeV energy deposition seen by the PMT (after attenuation) determined from Monte Carlo. For the innermost paddle with the highest rate this corresponds to a signal amplitude of 78mV. From this we deduct the PMT gain to be 1.8*10^5. For the next neighbouring paddle we expect a signal amplitude of about 130mV for these events resulting in a gain of 3.0*10^5 and for the first full width paddle and an expected signal amplitude of 208mV a gain of 4.8*10^5 is estimated.</ins></div></td></tr>
</table>Zihlmannhttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30894&oldid=prevZihlmann: /* Operating PMT at 0.02mA */2011-10-18T17:53:02Z<p><span dir="auto"><span class="autocomment">Operating PMT at 0.02mA</span></span></p>
<table class='diff diff-contentalign-left'>
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr style='vertical-align: top;'>
<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 17:53, 18 October 2011</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 145:</td>
<td colspan="2" class="diff-lineno">Line 145:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><span style="color:#FF0000"></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><span style="color:#FF0000"<ins class="diffchange diffchange-inline">><b</ins>></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br></span></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br<ins class="diffchange diffchange-inline">></b</ins>></span></div></td></tr>
</table>Zihlmannhttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30893&oldid=prevZihlmann: /* Operating PMT at 0.02mA */2011-10-18T17:52:39Z<p><span dir="auto"><span class="autocomment">Operating PMT at 0.02mA</span></span></p>
<table class='diff diff-contentalign-left'>
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr style='vertical-align: top;'>
<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 17:52, 18 October 2011</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 145:</td>
<td colspan="2" class="diff-lineno">Line 145:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"><span style="color:#FF0000"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">In the table above it is assumed that the gain of the PMT is set such that it draws a current of 0.02mA through the anode. For the 3cm wide full length paddle closest to the beam line a rate of about 1MHz is expected at low luminosity. Note, this is an estimate not a number derived directly from Monte Carlo simulations. The smallest signal expected in such a paddle when a minimum ionizing particle is hitting the far end is about 28mV. For the next paddle of the same width the gain can be set higher so that the smallest signals are expected to be about 75mV. Assuming a Threshold of 20mV there is only the innermost half width paddle that needs to be operated at a gain that will exceed the 0.02mA current limit assumed above. Doubling the current limit will lead to a doubling in gain and hence in a doubling in signal amplitude for this paddle to about 56mV. This wold be almost a factor of 3 above an assumed threshold of 20mV.<br></span></ins></div></td></tr>
</table>Zihlmannhttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30887&oldid=prevZihlmann: /* Operating PMT at 0.02mA */2011-10-18T15:53:07Z<p><span dir="auto"><span class="autocomment">Operating PMT at 0.02mA</span></span></p>
<table class='diff diff-contentalign-left'>
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr style='vertical-align: top;'>
<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 15:53, 18 October 2011</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 140:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|0.2</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|0.2</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|0.85</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|0.85</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>|<del class="diffchange diffchange-inline">100</del></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>|<ins class="diffchange diffchange-inline">250</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|1323</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|1323</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|265</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|265</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br></div></td></tr>
</table>Zihlmannhttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30886&oldid=prevZihlmann at 15:52, 18 October 20112011-10-18T15:52:12Z<p></p>
<table class='diff diff-contentalign-left'>
<col class='diff-marker' />
<col class='diff-content' />
<col class='diff-marker' />
<col class='diff-content' />
<tr style='vertical-align: top;'>
<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 15:52, 18 October 2011</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 54:</td>
<td colspan="2" class="diff-lineno">Line 54:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The following table is a list of the high rate paddles and what current to expect if the gain of the PMT is set such</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The following table is a list of the high rate paddles and what current to expect if the gain of the PMT is set such</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>that the mean of the electromagnetic background is set to be at 100mV signal amplitude. Note that as a consequence of this choice the gain for each PMT is different!</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>that the mean of the electromagnetic background is set to be at 100mV signal amplitude. Note that as a consequence of this choice the gain for each PMT is different!</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>{|border="1" cellpadding="5" cellspacing="0"</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>{|border="1" cellpadding="5" cellspacing="0<ins class="diffchange diffchange-inline">" style="text-align:right</ins>"</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>! scope="col" style="background:#efefef;" | Paddle #</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>! scope="col" style="background:#efefef;" | Paddle #</div></td></tr>
<tr><td colspan="2" class="diff-lineno">Line 107:</td>
<td colspan="2" class="diff-lineno">Line 107:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>h = 5*10^(4)/RATE <br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>h = 5*10^(4)/RATE <br></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In the following table the numbers are for the low intensity data taking:<br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In the following table the numbers are for the low intensity data taking:<br></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>{|border="1" cellpadding="5" cellspacing="0"  </div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>{|border="1" cellpadding="5" cellspacing="0<ins class="diffchange diffchange-inline">" style="text-align:right</ins>"</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>! scope="col" style="background:#efefef;"  | Paddle</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>! scope="col" style="background:#efefef;"  | Paddle</div></td></tr>
</table>Zihlmannhttps://halldweb1.jlab.org/wiki/index.php?title=Detector_Rates_and_Lifetime&diff=30885&oldid=prevZihlmann at 15:49, 18 October 20112011-10-18T15:49:50Z<p></p>
<table class='diff diff-contentalign-left'>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 15:49, 18 October 2011</td>
</tr><tr><td colspan="2" class="diff-lineno">Line 54:</td>
<td colspan="2" class="diff-lineno">Line 54:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The following table is a list of the high rate paddles and what current to expect if the gain of the PMT is set such</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The following table is a list of the high rate paddles and what current to expect if the gain of the PMT is set such</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>that the mean of the electromagnetic background is set to be at 100mV signal amplitude. Note that as a consequence of this choice the gain for each PMT is different!</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>that the mean of the electromagnetic background is set to be at 100mV signal amplitude. Note that as a consequence of this choice the gain for each PMT is different!</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>{|border="1" cellpadding="5" cellspacing="0<del class="diffchange diffchange-inline">" align="center</del>"</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>{|border="1" cellpadding="5" cellspacing="0"</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>! scope="col" style="background:#efefef;" | Paddle #</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>! scope="col" style="background:#efefef;" | Paddle #</div></td></tr>
<tr><td colspan="2" class="diff-lineno">Line 107:</td>
<td colspan="2" class="diff-lineno">Line 107:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>h = 5*10^(4)/RATE <br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>h = 5*10^(4)/RATE <br></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In the following table the numbers are for the low intensity data taking:<br></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>In the following table the numbers are for the low intensity data taking:<br></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>{|border="1" cellpadding="5" cellspacing="0<del class="diffchange diffchange-inline">" align="center</del>"</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>{|border="1" cellpadding="5" cellspacing="0"  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>|-</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>! scope="col" style="background:#efefef;"  | Paddle</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>! scope="col" style="background:#efefef;"  | Paddle</div></td></tr>
</table>Zihlmann