Difference between revisions of "Richard's note on RadPhi cables"
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− | + | The colors of the cables are not a very useful indicator to me. The best I can give you without being down there is a total channel count that you can apply as a "sum rule" to your inventory.<br> | |
− | The colors of the cables are not a very useful indicator to me. | + | |
− | best I can give you without being down there is a total channel count | + | |
− | that you can apply as a "sum rule" to your inventory.<br> | + | |
<br> | <br> | ||
<table width="100%" cellspacing="2" cellpadding="2" border="1"> | <table width="100%" cellspacing="2" cellpadding="2" border="1"> | ||
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<tr> | <tr> | ||
<td valign="top">Radphi device<br> | <td valign="top">Radphi device<br> | ||
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<td valign="top" align="center">48<br> | <td valign="top" align="center">48<br> | ||
</td> | </td> | ||
− | <td valign="top" align="center"> | + | <td valign="top" align="center">250 ns<br> |
</td> | </td> | ||
− | <td valign="top" align="center"> | + | <td valign="top" align="center">N/A<br> |
</td> | </td> | ||
</tr> | </tr> | ||
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</td> | </td> | ||
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</table> | </table> | ||
<br> | <br> | ||
− | The initial delay came off the base (lemo for LGD, bnc for all others) | + | The initial delay came off the base (lemo for LGD, bnc for all others) and ended at the racks. The long ones are mostly S-coiled in the cable trays, the others are one-length in the same cable tray. At the racks end the 80 ns cables go into splitters -- don't recall for sure but I think those were bnc connectors The long ones ended with lemo connectors at the racks that fed into the fastbus adc. The 170 ns cables delay the analog side of the split signals to feed into the adc. The other side of the split went into a discriminator and then out on twisted ribbon straight into the tdc. Those ones did not need a |
− | and ended at the racks. | + | |
− | trays, the others are one-length in the same cable tray. | + | |
− | end the 80 ns cables go into splitters -- don't recall for sure but I | + | |
− | think those were bnc connectors | + | |
− | connectors at the racks that fed into the fastbus adc. | + | |
− | cables delay the analog side of the split signals to feed into the | + | |
− | adc. | + | |
− | out on twisted ribbon straight into the tdc. | + | |
long delay because the tdc operated in common-stop.<br> | long delay because the tdc operated in common-stop.<br> | ||
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<br> | <br> |
Latest revision as of 07:34, 18 July 2006
The colors of the cables are not a very useful indicator to me. The best I can give you without being down there is a total channel count that you can apply as a "sum rule" to your inventory.
Radphi device |
channel count |
initial delay |
secondary delay |
lead glass wall (LGD) |
620 |
250 ns |
N/A |
barrel scintillators (BSD) |
48 |
80 ns |
170 ns |
forward scintillators (CPV) |
30 |
80 ns |
170 ns |
barrel gamma counters (BGV) |
48 |
250 ns |
N/A |
upstream scintillators (UPV) |
6 |
80 ns |
170 ns |
The initial delay came off the base (lemo for LGD, bnc for all others) and ended at the racks. The long ones are mostly S-coiled in the cable trays, the others are one-length in the same cable tray. At the racks end the 80 ns cables go into splitters -- don't recall for sure but I think those were bnc connectors The long ones ended with lemo connectors at the racks that fed into the fastbus adc. The 170 ns cables delay the analog side of the split signals to feed into the adc. The other side of the split went into a discriminator and then out on twisted ribbon straight into the tdc. Those ones did not need a
long delay because the tdc operated in common-stop.