[G8b_run] inconsistent timing in EVNT and TBID/GPID

[Barry Ritchie]

I realize it might be difficult to say at this point, Franz, but do you think these might have played some part in  generating some of the pronounced "wings" in the PID (beta v momentum) plots that Mike and Chuck saw (before applying other cuts)?

Barry G. Ritchie 
Vice Provost for Academic Personnel 
Arizona State University 
300 E. University Ave, Suite 420 
Tempe, AZ 85287-7805 
 
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-----Original Message-----
From: g8b_run-bounces at jlab.org [mailto:g8b_run-bounces at jlab.org] On Behalf Of Franz Klein
Sent: Thursday, June 27, 2013 12:03 PM
To: g8b
Subject: [G8b_run] inconsistent timing in EVNT and TBID/GPID

Hi,

after running user_ana in the debugger a few times, I found a few wrong timing corrections in SEB and I made some updates in PID. Corrections in PID deal with finding the 'best event time' - using the more robust g12 code; the 2 changes in SEB correct the usage of RFoffset (was added
twice) and photon time (was not corrected for target offset).
As a result I relinked the original st2tof offset! And I started a few jobs on the farm to check the modified version in clasg9 account (which we use for g8b recooking).

Now I go back to SC and TAG calibrations ....

Cheers,
Franz

--
===============================================================
                   Franz J. Klein, Associate Professor
                   CUA, Department of Physics
                   Washington, DC 20064
   office: Hannan Hall 206          phone: 202-319-6190
   or: Jefferson Lab,CC F-243       phone: 757-269-6672
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