thanks to karin for slides. hits in neighbouring detectors rejected 2 hits in non-neighbouring...
Post on 19-Dec-2015
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TRANSCRIPT
Hits in neighbouring detectors rejected
2 hits in non-neighbouring detectors accepted if the TOF difference < 5ns
Issues
1) Mistake in energy calibration of the signals made by Darek Wolski during his visit to fix problems on some neutron detectors in Oct 2005. Because of this, the CFD thresholds of ALL detector segments were increased by a factor of about 3.5.
2) Post expt Johan discovered an error in the Neutron Wall trigger timing. One of the signals had not enough delay, which lowered the neutron efficiency for events when a neutron was required to produce the fast trigger for EXOGAM.