Flow rate

Fe55 with premixed 50/50 Ar/CO₂, New preamp and new HVB, ADC half-range, for a range of HV and (later) gas flow rate
From New HVB:

New preamp and HVB - max amplitude histo for 55Fe

New preamp and HVB - energy histo for 55Fe

Mixed 50/50 at 80 sccm total, less HV

max amplitude histo for 55Fe mixed 50/50 at 80 sccm

energy histo for 55Fe mixed 50/50 at 80 sccm

Mixed 50/50 at 40 sccm total - note the change in x-axis scale. The 2050V run was wrong initially, corrected 1340 Oct 27.

max amplitude histo for 55Fe mixed 50/50 at 40 sccm

energy histo for 55Fe mixed 50/50 at 40 sccm

Various gas flow rates at 1850V (left) and 2050V (right)

energy histo for 55Fe mixed 50/50 at 1850V

energy histo for 55Fe mixed 50/50 at 2050V

Events at 80 sccm total, 1850V (left) and 2050V (right)

energy histo for 55Fe mixed 50/50 at 1850V

energy histo for 55Fe mixed 50/50 at 2050V

Events at 40 sccm total, 1850V (left) and 2050V (right)

energy histo for 55Fe mixed 50/50 at 1850V

energy histo for 55Fe mixed 50/50 at 2050V

As above, zoomed in on pedestal... 80 sccm total, 1850V (left) and 2050V (right)

energy histo for 55Fe mixed 50/50 at 1850V

energy histo for 55Fe mixed 50/50 at 2050V

40 sccm total, 1850V (left) and 2050V (right) The little blip at ~ch 250 in the RH plot is an afterpulse, this is not noticeable at 2000V.

energy histo for 55Fe mixed 50/50 at 1850V

energy histo for 55Fe mixed 50/50 at 2050V