Data taken with 10-90 gas mix were processed.

• pedestals were computed for each run based on the first 200 events
• pulse shape finding algo was not changed (ver A), clusters are larger in amplitude and span more  strips
• maxAdc from pulses are plotted in histograms 
• spectra R and P-strips were acumulated separately (see attachements A, B) 
• the R-plane spectra were choosen to decide on the target HV (see e.g. Fig 1), R-strip cover more area, have larger pulses.
• the nature of the multiple peaks visible at too high HV is not clear, why logic-1  values would be around 2300 adc?
• Note different # of events are used per HV set - focus on the shape of distribution,  low stats may be due to low number of input events
• the sequence of HV runs is different for each quadrant, selected to show best HV in lower left corner
•  Table at the bottom contais proposition of HV for 10-90 gas mix. It is likely 50-100 V adjustements wil be needed after we look at the data w/ new HV

Fig 1. Example of shapes for 5AR, middle peak at 3200V is puzzling. The peaks are present in both planes for this quadrant

Table 1.  Summary of HV sets used for 10-90 gas mix

Fig 3. Spectra for 14 quads, HV set 4, gas mix 10-90 ,maxAdc for clusters form R-strips, no change in the seed finder (ver A).

Fig 4. Gains from HV set 4, 200k events. Note low cluster yield per event: 1CR has 1 cluster/200 events . Red line is drawn by hand to guid the eye.

Table 2 : Used runs

hadd -f mix10_90_3400V.pulse.hist.root *13054059*pulse*

hadd -f mix10_90_3300V.pulse.hist.root *13054067*pulse*

hadd -f mix10_90_3200V.pulse.hist.root *13055005*pulse*

hadd -f mix10_90_3100V.pulse.hist.root *13055025*pulse*

hadd -f mix10_90_3000V.pulse.hist.root *13055040*pulse*

hadd -f mix10_90_2900V.pulse.hist.root *13055074*pulse*

hadd -f mix10_90_2800V.pulse.hist.root *13055077*pulse*

hadd -f mix10_90_2700V.pulse.hist.root *13055084*pulse*

hadd -f mix10_90_2600V.pulse.hist.root *13055091*pulse*

hadd -f mix10_90_2500V.pulse.hist.root *13056013*pulse*

Fig 5. Relative gains from HV set 5, 225k events, runs 13057054+59. Note, the following quads almost not responded to intended HV change: 1D, 4B, 6A. I have verified the hv_set4,5.cvs files were correct, also the gains for respective P-planes (not shows) are also lower for this 3 quads.