[d2n-analysis-talk] Trigger/Bit problem with runs 20570-20578?

[David Flay]

Hi Brad,

I'm trying to use a set of runs in the range 20570-20578, and I've noticed
that if I use a cut on evtypebits, I get empty histos.

I checked the trigger plot LT3 and it exists, however, the bit3 histo does
not -- despite ps=1 for these runs.  However there were a number of beam
trips during this period:

http://www.jlab.org/%7Eadaq/halog/html/0903_archive/090306235920.html

But, that shouldn't disturb the bit histo.

Maybe it's best to avoid this data for now (given the high frequency of
beam trips ~ 12/hr)?

-------------------------------------------------
David Flay
Physics Department
Temple University
Philadelphia, PA 19122

office: Barton Hall, BA319
phone: (215) 204-1331

e-mail: flay at jlab.org
              david.flay at temple.edu

website: http://www.jlab.org/~flay
-------------------------------------------------