CDC tilted detectors summary

Prototype at 2100V, ~50/50 Ar/CO2

Tilted detectors

Tilted detectors

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50/50 Ar/CO2 mixed gas

Integrated signal histograms, central block of straws

Horizontal

Tilt 30°

Tilt 45°

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 for horizontal : 30° : 45° should be 1 : 1.15 : 1.41

The 45° and 0° runs were separated by 1/2 day; the 30° data was taken one week later.

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 Ar/CO2 mixed gas, hits closer than 1mm to the wire

Integrated signal histograms, drift time < 11ns (1mm either side of the wire)

Horizontal

Tilt 30°

Tilt 45°

The events in the noise peak in the amplitude histo do not reach the integration histo because the code ignores hits with a leading edge gradient less than 1.

Amplitude MPVs and ratios to value for horizontal, drift time < 11ns

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
281	272	364	335	382	383	1.30	1.23	1.36	1.41

Integrated signal MPVs and ratios to value for horizontal, drift time < 11ns

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
8604	7986	11658	10839	12339	11537	1.35 ± 0.04	1.36	1.43 ± 0.04	1.44

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51/49 Ar/CO2 premixed gas, unfiltered, label reads analysis 49.1 CO2

Integrated signal histograms, Drift time < 11ns

Tilt 0°

Tilt 30°

Tilt 45°

Integrated signal MPVs and ratios to value for horizontal, drift time < 11ns

Horizontal MPV	30 degrees MPV	45 degrees MPV	30 degrees:horizontal	45 degrees:horizontal
Landau	Landau	Landau	Landau	Landau
12970	15850	16217	1.22 ± 0.02	1.25 ± 0.03

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More 51/49 Ar/CO2 premixed gas, unfiltered, label reads analysis 48.6 CO2

Amplitude histograms, Drift time < 11ns

Tilt 0°

Tilt 15°

Tilt 20°

File:Run 32068 ampfitlanz 11ns.png Tilt 30°

File:Run 32070-32074 ampfitlanz 11ns.png Tilt 45°

Amplitude MPVs from Landau fits, drift time < 11ns

MPV from Landau fit to integrated amplitude histo
Horizontal	15 degrees	20 degrees	30 degrees	45 degrees
520 ± 6	501 ± 11	546 ± 12	559 ± 11	642 ± 8
Ratio of MPV tilted:horizontal
	15 degrees	20 degrees	30 degrees	45 degrees
	0.96 ± 0.02	1.05 ± 0.03	1.08 ± 0.02	1.23 ± 0.02

Integrated signal amplitude MPVs from Landau fits, drift time < 11ns

MPV from Landau fit to integrated amplitude histo
Horizontal	15 degrees	20 degrees	30 degrees	45 degrees
12398 ± 138	13609 ± 227	14330 ± 264	15334 ± 273	18033 ± 190
Ratio of MPV tilted:horizontal
	15 degrees	20 degrees	30 degrees	45 degrees
	1.10 ± 0.02	1.16 ± 0.02	1.22 ± 0.02	1.45 ± 0.02
Ratio of vertical path length for detector tilted:horizontal
	1.04	1.06	1.15	1.41

Integrated signal histograms, Drift time < 11ns

Tilt 0°

Tilt 20°

Tilt 30°

Tilt 45°

Integrated signal MPVs and ratios to value for horizontal, drift time < 11ns

Horizontal MPV	20 degrees MPV	30 degrees MPV	45 degrees MPV	20 degrees:horizontal	30 degrees:horizontal	45 degrees:horizontal
Landau	Landau	Landau	Landau	Landau	Landau	Landau
12974 ± 219	15057 ± 260	16053 ± 266	18642 ± 272	1.16 ± 0.03	1.24 ± 0.03	1.43 ± 0.03

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All ratios in one table

Ratio of integrated signal fitted Landau MPV to value for horizontal, drift time < 11ns

Gas mix	20 degrees:horizontal	30 degrees:horizontal	45 degrees:horizontal
50/50 mixed gas		1.35 ± 0.04	1.43 ± 0.04
50.8/49.1 premixed gas		1.22 ± 0.02	1.25 ± 0.03
51.4/48.6 premixed gas	1.16 ± 0.03	1.24 ± 0.03	1.43 ± 0.03