First EPD Physics of 2018

The very first physics run of the EPD is 19074053.  This run includes the proper gate settings and bias settings.

A one figure summary:

First the interesting points...


Figure 1: Average ADC Channel by Channel from run 19074053.

The green channel is West PP 5 TT 23.  It does have a lower MIP peak than the others.


Figure 2:  The ADC spectra on the right is the green tiles from the average ADC (W PP5 TT23).  I noticed that the voltage was a very low Vbias = 55.  This was accidentally changed from 58V in the process of setting the channels connected to the TT 0 "tiles" to 58 V.  We have changed it back.

The two Yellow Channels were: WPP12TT31 (Vbias = 57) and WPP12TT18 (Vbias = 56.9)

Mike's output indicates that these should be WPP12TT31 = 58.5 and WPP12TT18 = 56.9, so the latter is correct but not the former.  Macro cut off the very last entry, so this is the old value.  I have fixed this in the macro and online. Other spot-checks indicate a consistent voltage so I will change the latter one and look again.

All of these should be fixed for run numbers after 19047061.