[G14_run] G14 meeting on Thursday, August 16, 9:30am (room L-210a)

Haiyun Lu lu at ernest.phys.cmu.edu
Wed Aug 15 12:41:31 EDT 2012


I will not be able to attend tomorrow's meeting. A couple of updates I 
want to mention:
1. Cook pass0/v5 has been done. However, I am not sure if the SC 
calibration constants for runs after 69045 have been applied on this pass.
2. The global shift does NOT depend solely on TOF calibration. For 
example, runs between 68400 and 68770 had been corrected before pass0v5. 
I was expecting there is no visible deviation from 0 for pi+. There 
appears about 50ps remaining (over-corrected).
3. Runs from 68771 to 68997 have NOT been calibrated.
4. The latest global shift is summarized in 
http://www.jlab.org/Hall-B/secure/g14/HLu/tof_calib/runtable.html . I 
first re-organize run information based on 
http://clasweb.jlab.org/rungroups/g14/wiki/index.php/Summary_of_g14_run 
. Then by observing the csql histogram of RF pi+, I obtained the 
corrections for each run range and applied onto p2p constants.
5. I have a question that what could cause the change of the global 
shifts. I would think this should be unchanged as long as no 
configuration change. If that is true, I would like a list of 
configuration change so that I could group the runs correctly to do the 
correction.

Cheers,
Haiyun
On 08/14/2012 06:24 PM, Franz Klein wrote:
> Dear collaborators,
>
> our next group meeting will be on Thursday, August 16, at 9:30am in room
> L-210a
>    (instructions for off-site participants below)
>
> Agenda:
>
> * Summary of g14 run
> * Calibrations
> * Ongoing and planned analyses
> * Other items
>
> (see http://clasweb.jlab.org/rungroups/g14/wiki/index.php/August_16,_2012)
> Please add you links to the webpage!
>
> I'm back to work and hope to hear you all at the meeting,
> Franz
>
> =========================================
>
> Instructions for offsite participants:
>
> * Dial Toll-Free Number: 866-740-1260 (U.S.&  Canada)
>    o International participants dial: Toll Number: 303-248-0285
>    o Or International Toll-Free Number: http://www.readytalk.com/intl
> * Enter 7-digit access code, 2877656 followed by #
>



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