At 1950V, 50/50 gas:
Tracked cosmics - amplitude spectra for channel 7. In software, threshold = pedestal-mean + n * pedestal-width. n=10.
Chamber is horizontal (left) and then tilted at 45 degrees (right).
Old preamp, n=10
 old preamp, cosmics, 50/50 Ar/CO2, 1950V |
 old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees |
New preamp, n=10, ADC range halved (scale doubled)
 new preamp, cosmics, 50/50 Ar/CO2, 1950V |
 new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees |
Zoom in on first pic (old preamp, n=10)
 old preamp, cosmics, 50/50 Ar/CO2, 1950V, scale expanded |
Repeat with n=8
Old preamp, n=8
 old preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8 |
 old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8 |
New preamp, n=8, ADC range halved (scale doubled)
 new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8 |
 new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8 |
Repeat with n=6
Old preamp, n=6
 old preamp, cosmics, 50/50 Ar/CO2, 1950V, n=6 |
 old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=6 |
New preamp, n=6, ADC range halved (scale doubled)
 new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=6 |
 new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=6 |
Conclude that n=8 works best for the old preamp (tilted)
Energy spectra for n=8
Old preamp
 old preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8 |
 old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8 |
New preamp, ADC range halved
 new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8 |
 new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8 |
Look at a higher voltage for the old preamp to separate peak from noise (n=8)
Old preamp (flat), 2050V
 old preamp, cosmics, 50/50 Ar/CO2, 2050V, n=8 |
 old preamp, cosmics, 50/50 Ar/CO2, 2050V, n=8 |
Old preamp (tilted), 2050V
 old preamp, cosmics, 50/50 Ar/CO2, 2050V, n=8 |
 old preamp, cosmics, 50/50 Ar/CO2, 2050V, n=8 |
Help.
Old preamp (tilted), 2050V, software threshold n=10
 old preamp, cosmics, 50/50 Ar/CO2, 2050V, n=10 |
 old preamp, cosmics, 50/50 Ar/CO2, 2050V, n=10 |
Old preamp (flat), 2050V, software threshold n=10, newer data
 old preamp, cosmics, 50/50 Ar/CO2, 2050V, n=10, 30726 |
 old preamp, cosmics, 50/50 Ar/CO2, 2050V, n=10, 30726 |
