Difference between revisions of "Preamp 4: Comparison of 55Fe data with original preamp"
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|width="415pt"|[[Image:Fe_amplitude_2050V_old_preamp.jpg|thumb|none|400px|amplitude: old preamp, 55Fe, 50/50 Ar/CO2, 2050V]] | |width="415pt"|[[Image:Fe_amplitude_2050V_old_preamp.jpg|thumb|none|400px|amplitude: old preamp, 55Fe, 50/50 Ar/CO2, 2050V]] | ||
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|width="415pt"|[[Image:Fe_energy_2050V_old_preamp.jpg|thumb|none|400px|energy: old preamp, 55Fe, 50/50 Ar/CO2, 2050V]] | |width="415pt"|[[Image:Fe_energy_2050V_old_preamp.jpg|thumb|none|400px|energy: old preamp, 55Fe, 50/50 Ar/CO2, 2050V]] | ||
|width="415pt"|[[Image:Fe_energy_2050V_preamp4.jpg|thumb|none|400px|energy: new preamp, 55Fe, 50/50 Ar/CO2, 2050V]] | |width="415pt"|[[Image:Fe_energy_2050V_preamp4.jpg|thumb|none|400px|energy: new preamp, 55Fe, 50/50 Ar/CO2, 2050V]] | ||
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Revision as of 11:14, 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 - original (left) and new (right) preamps
1900V (detector efficiency at this voltage is very low)
1950V
2000V
2050V
Energy - original (left) and new (right) preamps
1900V
1950V
2000V
2050V
