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 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

Hits closer than 1mm to the wire

Prototype horizontal, drift time < 11ns (1mm either side of the wire)

Max amplitude

zoomed

Integration

zoomed

Prototype tilted 30deg, drift time < 11ns (1mm either side of the wire)

Max amplitude

zoomed

Integration

zoomed

Prototype tilted 45deg, drift time < 11ns (1mm either side of the wire)

Max amplitude

zoomed

Integration

zoomed

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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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
Repeating the tilted measurements just in case the scintillators moved slightly between measurements

Prototype tilted 0deg

Max amplitude

Integration

Prototype tilted 30deg

Max amplitude

Integration

Prototype tilted 45deg

Max amplitude

Integration

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

Amplitude MPVs and ratios to amplitude with prototype horizontal - old data in table still so ignore

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
383	403	394	419	378	413	1.03	1.04	0.99	1.02

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
8038	7994	9049	10413	9291	10591	1.13 ± 0.02	1.30	1.16 ± 0.02	1.32

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