Efficiency calibration in the lab

************************************
CAUTION! 
This is now GEM1800 @ 145deg distance
But still operated as Xray1 in DAQ
************************************

Threshold slightly increased

Detector: GEM1800 - 145 deg
Source: 241Am_hi
Distance: 305mm
Start time: 10:27:58 - 14.05.2021
Stop time:  11:14:03 - 14.05.2021

file name: e127b_run0042.lmd
avrg. rate: 200Hz
dead-time:  1.5%

Blocking gate 2.5 us in vulom.

Threshold < 10keV

The scale serial communication is off.