[Eg6_analysis] meeting tomorrow

[Francois-Xavier Girod]

Dear all,

concerning the dependence of the beam position according to scalers in the notebook
I use Nathan's run list at
https://userweb.jlab.org/~baltzell/EG6/eg6_1Mruns.pdf

The results are in periods below.

Best regards,
FX

(1)
The beam seems stable between :
run #61258 @ 1.2 GeV & 80 nA
http://clasweb.jlab.org/clasonline/servlet/newloginfo?action=logentry&entryId=31117
run #61478 @ 1.2 GeV & 150 nA
http://clasweb.jlab.org/clasonline/servlet/newloginfo?action=logentry&entryId=31254

Changing number of passes there is a change mostly in X position 

(2)
run #61535 @ 6 GeV & 150 nA
http://clasweb.jlab.org/clasonline/servlet/newloginfo?action=logentry&entryId=31346
run #61843 @ 6 GeV & 130 nA
http://clasweb.jlab.org/clasonline/servlet/newloginfo?action=logentry&entryId=32282

RTPC is taken out at this point, target cell replaced and window installed
the beam position is then re-adjusted

re-establishing new conditions :

(3)
run #61849 @ 6 GeV & 100 nA
http://clasweb.jlab.org/clasonline/servlet/newloginfo?action=logentry&entryId=32282
run #61930 @ 6 GeV & 50 nA 
http://clasweb.jlab.org/clasonline/servlet/newloginfo?action=logentry&entryId=32517

there are some instabilities in the BOM count rates reported in the logbook but no indication of beam position instability

next we go back to 1.2 GeV and I think beam was nice and stable

(4)
run #61933 @ 1.2 GeV & 50 nA
http://clasweb.jlab.org/clasonline/servlet/newloginfo?action=logentry&entryId=32557
run #61965 @ 1.2 GeV & 65 nA
http://clasweb.jlab.org/clasonline/servlet/newloginfo?action=logentry&entryId=32638