MUID Thr/HV/Eff Studies

Executive summary: (selected subset of all info below)

I) Look at the following GIFs; showing the efficiency vs HV. The plateu is just reached at around 4300 V with 90 mV.

First Run Last Run Arm Gap Gif-Eff Gif-Comment
98880 98912 0 2 Horiz, Vert Gap 2 again
98880 98912 1 2 Horiz, Vert Gap 2 again

II) Here are some 1D efficiency plots for two HV settings for gap 2:

HV (V) Gif
4300 South, North
4480 South, North

The South 4300 (especially for vertical) values look pretty close (suspiciously high? higher than 4480..) to the 4480 values. In case something went wrong with the book-keeping, I looked at some ~1 day older files also. They look very similar:
HV (V) Gif
4300 South, North
4480 South, North

III) Here I've put some comparison plots with eff. results using Hiroki's method on Run-3 dAu data. I compared the d-Au results with cosmics taken at 4300 V and 90 mV threshold, which were the values used for the dAu part of the run. For North, there's a pretty good average agreement between Hiroki's values and the cosmic data numbers (1-2 % difference). For South, there is about an 8-10 % difference, with the higher number coming from the cosmics analysis. [Yes, the cosmic analysis of gap/plane = 4 failed - looks like we took some corrupt data somehow].
HV (V) Gif : comparison Gif : ratio
4300 South, North South, North

End of executive summary..

We also put the 60 and 90 mV measurements on the same plots:

First Run Last Run Arm Gap Gif-Eff Gif-Comment
98880 98944 1 2 Horiz, Vert Gap 2, 60 and 90 mV
98880 98944 0 2 Horiz, Vert Gap 2, 60 and 90 mV