CDC tilted detectors

Prototype at 2100V, 50/50 Ar/CO2

Tilted detectors

Tilted detectors

Prototype horizontal

Max amplitude

zoomed

Integration

zoomed

Prototype tilted 30deg

Max amplitude

zoomed

Integration

zoomed

Prototype tilted 45deg

Max amplitude

zoomed

Integration

zoomed

The paler lines are fits to a Landau dist, the darker lines are fits to a Landau-Gaussian convolution.

Ratio of MPVs of Landau fit to integration histograms... horizontal : 30deg : 45deg is 5110 : 6620 : 7160 or 1 : 1.29 : 1.40 Ideally this should be 1 : 1.15 : 1.41

Amplitude MPVs and ratios to amplitude with prototype horizontal

Horizontal MPV		30 degrees MPV		45 degrees MPV		30 degrees:horizontal		45 degrees:horizontal
Landau	Landau-Gauss	Landau	Landau-Gauss	Landau	Landau-Gauss	Landau	Landau-Gauss	Landau	Landau-Gauss
218	229	256	264	264	285	1.17	1.15	1.21	1.24

Integrated signal MPVs and ratios to value for horizontal

Horizontal MPV		30 degrees MPV		45 degrees MPV		30 degrees:horizontal		45 degrees:horizontal
Landau	Landau-Gauss	Landau	Landau-Gauss	Landau	Landau-Gauss	Landau	Landau-Gauss	Landau	Landau-Gauss
5167	5301	6722	7446	7163	8113	1.30	1.40	1.39	1.53

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50/50 premix gas, unfiltered, label reads analysis 49.1 CO2, so this is 51/49 Ar/CO2

2100V with prototype horizontal, scintillators vertical

Drift time histogram, central block of straws

Maximum amplitude histogram, central block of straws

Integration histogram, central block of straws

Estimated max drift time is 650ns