Efficiency calibration in the lab

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CAUTION! 
This is now GEM1800 @ 90deg distance
But still operated as Xray1 in DAQ
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Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 13:24:26 - 13.05.2021
Stop time:  14:06:35 - 13.05.2021

file name: e127b_run0037.lmd
avrg. rate: 70Hz
dead-time:  1%

Blocking gate 2.5 us in vulom.

Threshold < 10keV

The scale serial communication is off.