CDC prototype tilted

Scintillators above and below prototype, 49cm apart. Scintillator width is 13cm. Prototype placed on lower scintillator with straws at 90 degrees to long axis of scintillators.

Hits in straw 17

Ratios of integrated signal with prototype tilted and flat

Prototype horizontal

Prototype at 30 degrees to horizontal

Prototype at 45 degrees to horizontal

Tracked hits in straw 17

Ratios of integrated signal with prototype tilted and flat

Prototype horizontal

Prototype at 30 degrees to horizontal

Prototype at 45 degrees to horizontal

Tracked hits in straw 17, track also passes through straw 23 (same column)

Ratios of integrated signal with prototype tilted and flat

Prototype horizontal

Prototype at 30 degrees to horizontal

Prototype at 45 degrees to horizontal

The fits are not great but all err in the same direction. Calculated MPV errors are < 1%. By eye I would have picked the MPVs for the histograms below (45 degrees and flat, ~vertical tracked hits, 50 samples integrated) at 5.5 and 3.4 x10^3 giving a ratio of 1.6. The calculated ratio of fit MPVs was 1.64 and histogram means was 1.60. Geometrically it should be 1.45 (the pink line) as the scintillator widths allow tracks up to 15 deg each side of vertical.

Tracked hits in straw 17, track also passes through straw 23 (same column)

50 samples integrated with prototype tilted and flat