Difference between revisions of "Newest preamp"
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[[Image:run_31635_e.png|thumb|420px|Integrated, 96ns, 55Fe, 2050V, Struck fADC range 1.1V]] | [[Image:run_31635_e.png|thumb|420px|Integrated, 96ns, 55Fe, 2050V, Struck fADC range 1.1V]] | ||
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| + | Below: Scope pics with Fe55, preamp4 (left) and preamp5 (right) (preamp5=preamp4 minus terminating resistors), 2050V | ||
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| + | [[Image:preamp4_Fe55_2050.png|thumb|420px|Preamp4, Fe55, 2050V]] | ||
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| + | [[Image:preamp5_Fe55_2050.png|thumb|420px|Preamp5, Fe55, 2050V]] | ||
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Revision as of 10:45, 28 April 2011
- 50/50 mixed Ar, CO2
- Recalibrated MFCs
- Outer plenum added to CDC prototype to prevent leaks
- New modified HVB
- 2050V
- Comparison of modified preamp (preamp4 with terminating resistors removed) and its predecessor (preamp4)
Below: cosmics with new fADC, preamp4 (top) and newest modified preamp (below). Blue histograms are tracked hits, runtimes were not equal.
The fADC range is 0-4096. These are histograms of the first maximum in ADC value for each event, pedestal has been subtracted, maximum must be above threshold. Threshold is pedestal mean + 5sigma.
Pedestal mean was approx 100, sigma is 9-12.
Below: threshold pedestal mean + 4sigma
Below: 2100V (threshold pedestal mean + 5sigma)
Earlier new fADC results are on this page: New_fADC_with_cosmics
Below: 55Fe spectra with preamp 4 and Struck ADCs set to half-range, 550mV
Below: 55Fe spectra with newest preamp (preamp4 minus terminating resistors) and Struck ADCs set to full-range, 1.1V
Below: Scope pics with Fe55, preamp4 (left) and preamp5 (right) (preamp5=preamp4 minus terminating resistors), 2050V
Below: Scope pics with cosmics, preamp4 (left) and preamp5 (right) (preamp5=preamp4 minus terminating resistors), 2050V
