Use mixed 50/50 Ar/CO2 and vary the flow rate through the mixer.
Data taken at 80sccm total, 60sccm and 40sccm.
 Upper end of drift time histo of tracks through central block of straws (middle 2 in each row) |
From an old and short 2200V run
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 Events at 2200V (zoom in on pedestal) |
