Difference between revisions of "New HVB"
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Scope traces for premixed 50/50 Ar/CO<sub>2</sub> | Scope traces for premixed 50/50 Ar/CO<sub>2</sub> | ||
+ | {| border="0" cellpadding="2" | ||
+ | |width="400pt"| | ||
+ | [[Image:newHVB_Fe55_2100V_30s.jpg|thumb|400px|Fe55 at 2100V (50mV/div 100ns/div)]] | ||
+ | |width="400pt"| | ||
+ | [[Image:newHVB_cosmics_2100V_30s.jpg|thumb|400px|Cosmics at 2100V (50mV/div 100ns/div)]] | ||
+ | |} | ||
+ | older pics below (trigger was too high) | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
|width="400pt"| | |width="400pt"| |
Revision as of 12:53, 15 September 2010
Max amplitude histograms for
cosmics at 2100V with 50/50 Ar/CO2
Left: new preamp and new HVB, ADC half-range; right: old preamp and HVB, ADC full-range
Purple: untracked, blue: tracked (less of this with old preamp because of 2 dead central channels)
Cosmics with premixed 50/50 Ar/CO2, New preamp and new HVB, ADC half-range
NB expanded x-axis, zoomed to 1000ch from 4096.
Left: 2000V; Right: 2050V; Far Right: 1950V (too low for software threshold of ped_mean+5sigma)
Fe55 with premixed 50/50 Ar/CO2, New preamp and new HVB, ADC half-range, for a range of HV
Left: max amplitude histogram; Right: energy
Mean pedestal is around 455ch, this has been subtracted from the amplitude histogram so at 2200V it is the fADC saturating rather than the preamp.
The beginnings of a new HV efficiency plot
Scope traces for premixed 50/50 Ar/CO2
older pics below (trigger was too high)