Difference between revisions of "Preamp 4: Comparison of 55Fe data with original preamp"
From GlueXWiki
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<br>Amplitude<br> | <br>Amplitude<br> | ||
| − | 1900V | + | 1900V (detector efficiency at this voltage is very low) |
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|width="415pt"|[[Image:Fe_amplitude_1900V_old_preamp.jpg|thumb|none|400px|amplitude: old preamp, 55Fe, 50/50 Ar/CO2, 1900V]] | |width="415pt"|[[Image:Fe_amplitude_1900V_old_preamp.jpg|thumb|none|400px|amplitude: old preamp, 55Fe, 50/50 Ar/CO2, 1900V]] | ||
Revision as of 09:58, 10 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
1900V (detector efficiency at this voltage is very low)
1950V
2000V
2500V
File:Fe amplitude 2500V old preamp.jpg amplitude: old preamp, 55Fe, 50/50 Ar/CO2, 2500V |
File:Fe amplitude 2500V preamp4.jpg amplitude: new preamp, 55Fe, 50/50 Ar/CO2, 2500V |
Energy
1900V
1950V
2000V
2500V
File:Fe energy 2500V old preamp.jpg energy: old preamp, 55Fe, 50/50 Ar/CO2, 2500V |
File:Fe energy 2500V preamp4.jpg energy: new preamp, 55Fe, 50/50 Ar/CO2, 2500V |
