Difference between revisions of "Newest preamp"
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*Comparison of modified preamp (preamp4 with terminating resistors removed) and its predecessor (preamp4) | *Comparison of modified preamp (preamp4 with terminating resistors removed) and its predecessor (preamp4) | ||
− | Below: cosmics with new fADC, 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 4096. | + | The fADC range is 0-4096. These are histograms of the first maximum in ADC value for each event, pedestal has been subtracted. |
+ | Pedestal mean was approx 100, sigma is 9-12. | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
|width="420pt"| | |width="420pt"| | ||
− | [[Image:run_31599_amp6.png|thumb|420px|Max amplitude histo for cosmics, new fADC, modified HVB, mixed 50/50 at 60 sccm 2050V]] | + | [[Image:run_31599_amp6.png|thumb|420px|Max amplitude histo for cosmics, new fADC, modified HVB, mixed 50/50 at 60 sccm 2050V]] |} |
+ | |||
+ | {| border="0" cellpadding="2" | ||
|width="420pt"| | |width="420pt"| | ||
[[Image:run_31646_thr5_amp6.png|thumb|420px|Max amplitude histo for cosmics, new fADC, modified HVB, modified preamp, mixed 50/50 at 60 sccm 2050V]] | [[Image:run_31646_thr5_amp6.png|thumb|420px|Max amplitude histo for cosmics, new fADC, modified HVB, modified preamp, mixed 50/50 at 60 sccm 2050V]] |
Revision as of 08:42, 20 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. Pedestal mean was approx 100, sigma is 9-12.
|}
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 |