CH He3 Background Measurements

Be careful with pre-amp. Bumping SHV cable from pre-amp to He3 tube results in false counts leading to hundreds of extra counts.

1250V Source Out Data
Run Number	Configuration	Discriminator Threshold (mV)	Cf-252 Button Source	Counts	Run Time (Sec)	Count Rate (Hz)	Uncertainty
1	Unshielded detector at +1250V	255	No	30	300
2	Unshielded detector at +1250V	255	No	18	300
3	Unshielded detector at +1250V	255	No	31	300
4	Unshielded detector at +1250V	255	No	24	300
5	Unshielded detector at +1250V	255	No	39	300
6	Unshielded detector at +1250V	255	No	42	300
7	Unshielded detector at +1250V	255	No	34	300
8	Unshielded detector at +1250V	255	No	45	300
9	Unshielded detector at +1250V	255	No	34	300
10	Unshielded detector at +1250V	255	No	36	300

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PAS_He3_Detector