CDC garfield calcs

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Real life results from prototype 2100V 50/50 Ar/CO2 with scintillators horizontal, cosmics not limited to 90o
Drift time (- offset) in ns
First max in signal amplitude
Integrated signal
Integrated signal (zoomed in)
Garfield for 3GeV muons at 90o to straw
Drift time (- offset)
First max in signal amplitude
Integrated signal
Garfield for 3GeV muons at 90o to straw within 1mm of wire
Drift time (- offset)
First max in signal amplitude
Integrated signal


Garfield for 3GeV muons at 90o to straw within 5mm and 6mm from wire
Drift time (- offset)
First max in signal amplitude
Integrated signal
Integrated signal
Garfield for 3GeV muons at 90o to straw within 6mm and 7mm from wire
Drift time (- offset)
First max in signal amplitude
Integrated signal
Integrated signal
Garfield for 3GeV muons at 90o to straw within 7mm and 8mm from wire
Drift time (- offset)
First max in signal amplitude
Integrated signal
Integrated signal
Garfield for 3GeV muons at 90o to straw within 7.5mm and 8mm from wire
Drift time (- offset)
First max in signal amplitude
Integrated signal
Integrated signal


Prototype results (as top) from signals near the edge of the straw
Integrated signal with drift time > 760ns



Garfield for 400MeV/c protons at 45o to straw
Drift time (- offset)
First max in signal amplitude
Integrated signal


Garfield for 400MeV/c protons at 23o to straw
Drift time (- offset)
First max in signal amplitude
Integrated signal
Garfield for 400MeV/c protons at 45o to straw within 1mm of wire
Drift time (- offset)
First max in signal amplitude
Integrated signal


Garfield for 400MeV/c protons at 23o to straw within 1mm of wire
Drift time (- offset)
First max in signal amplitude
Integrated signal


Cosmics, same prototype run, lower hit threshold (3sigma) and minimum number of hits=1, 2100V 50/50 Ar/CO2
Max amp
Integrated signal
Integrated signal for hits with maxamp < 90
Integrated signal for hits with maxamp < 60
Integrated signal for hits with maxamp < 60
Cosmics, same prototype run, 2100V 50/50 Ar/CO2, look at low amplitude hits and exclude events identified (in another file) as having a higher amplitude hit later on
Max amplitude for 3 sigma hit threshold, blue: all 3sigma hits, pink: excluded later hits over 5 sigma
Integrated signal for 3 sigma hit threshold, blue: all 3sigma hits, pink: excluded later hits over 5 sigma
Cosmics, same prototype run, 2100V 50/50 Ar/CO2, look at hits with drift radius > 7mm and exclude events identified (in another file) as having a higher amplitude hit later on
Max amplitude for 3 sigma hit threshold, 7mm+, blue: all 3sigma hits, pink: excluded later hits over 5 sigma
Integrated signal for 3 sigma hit threshold, 7mm+, blue: all 3sigma hits, pink: excluded later hits over 5 sigma


Max amplitude for 2 sigma hit threshold, blue: all 2sigma hits, pink: excluded later hits over 3 sigma
Integrated signal for 2 sigma hit threshold, blue: all 2sigma hits, pink: excluded later hits over 3 sigma
Fit histo with excluded later hits over 3 sigma, mean fixed near 0