Difference between revisions of "Preamp 4: Comparison of 55Fe data with original preamp at lower voltage"

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1950V (this was shown earlier, the y axis scale is expanded)
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{| border="1" cellpadding="2"
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|width="415pt"|[[Image:Fe_amplitude_1950V_old_preamp_diff_yaxis.jpg|thumb|none|400px|amplitude: old preamp, 55Fe, 50/50 Ar/CO2, 1950V]]
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|width="415pt"|[[Image:Fe_amplitude_1950V_preamp4.jpg|thumb|none|400px|amplitude: new preamp, 55Fe, 50/50 Ar/CO2, 1950V]]
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<br>Energy - original (left) and new (right) preamps<br>
 
<br>Energy - original (left) and new (right) preamps<br>
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|width="415pt"|[[Image:Fe_energy_1900V_old_preamp.jpg|thumb|none|400px|energy: old preamp, 55Fe, 50/50 Ar/CO2, 1900V]]
 
|width="415pt"|[[Image:Fe_energy_1900V_old_preamp.jpg|thumb|none|400px|energy: old preamp, 55Fe, 50/50 Ar/CO2, 1900V]]
 
|width="415pt"|[[Image:Fe_energy_1900V_preamp4.jpg|thumb|none|400px|energy: new preamp, 55Fe, 50/50 Ar/CO2, 1900V]]
 
|width="415pt"|[[Image:Fe_energy_1900V_preamp4.jpg|thumb|none|400px|energy: new preamp, 55Fe, 50/50 Ar/CO2, 1900V]]
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1950V
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{| border="1" cellpadding="2"
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|width="415pt"|[[Image:Fe_energy_1950V_old_preamp.jpg|thumb|none|400px|energy: old preamp, 55Fe, 50/50 Ar/CO2, 1950V]]
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|width="415pt"|[[Image:Fe_energy_1950V_preamp4.jpg|thumb|none|400px|energy: new preamp, 55Fe, 50/50 Ar/CO2, 1950V]]
 
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Latest revision as of 14:03, 14 June 2010

The pictures below show ADC amplitude and energy histograms for 55Fe data with 50/50 Ar/CO2 gas mixture (the maximum ADC amplitude for each event contributes one entry for that amplitude in the histogram; the energy spectra were obtained by integrating the event amplitude after pedestal subtraction).


These compare data taken using the old and new preamps - the "old" preamp is the original one and the "new" preamp is Preamp4, described in Table 2 row 2 of GlueX-doc-1364 and labelled 27.


Amplitude - original (left) and new (right) preamps



1900V

amplitude: old preamp, 55Fe, 50/50 Ar/CO2, 1900V
amplitude: new preamp, 55Fe, 50/50 Ar/CO2, 1900V


1950V (this was shown earlier, the y axis scale is expanded)

amplitude: old preamp, 55Fe, 50/50 Ar/CO2, 1950V
amplitude: new preamp, 55Fe, 50/50 Ar/CO2, 1950V


Energy - original (left) and new (right) preamps

1900V

energy: old preamp, 55Fe, 50/50 Ar/CO2, 1900V
energy: new preamp, 55Fe, 50/50 Ar/CO2, 1900V


1950V

energy: old preamp, 55Fe, 50/50 Ar/CO2, 1950V
energy: new preamp, 55Fe, 50/50 Ar/CO2, 1950V
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