CDC tilted detectors

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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




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