[Hallc_running] [New Logentry] RC daily update

berdnik at jlab.org berdnik at jlab.org
Thu Oct 18 14:00:04 EDT 2018

Logentry Text:
* Took RC chair over Sylvester around 2pm
* No beam till 16-20 due chopper RF problems
* "We didn`t fix it, problem just go away" MCC; 45uA to HallC (beam current limited by SHMS singles rate)
* 1 hour brake around 19-00 due some magnet problems in the machine
* Stop production run for kinematic Q2=5.5. W=3.02 x=0.40  theta_Shms=6.49 with ~43.7% stat goal
* Kinematic changed to Q2=5.5. W=3.02 x=0.40  theta_Shms=9.552 https://logbooks.jlab.org/entry/3611108
* Beam current 60uA for swing
* Smooth overnight production with beam current up to 70uA
* LH2 target event .https://logbooks.jlab.org/entry/3611416 . https://logbooks.jlab.org/entry/3611426 
* Target changed to Dummy 
* Kinematic changed to Q2=5.5. W=3.02 x=0.40  theta_Shms=12.565 https://logbooks.jlab.org/entry/3611515
* LH2 target restored https://logbooks.jlab.org/entry/3611488
* Continue production  runs with beam current up to 80uA 
* Beam not stable, current reduced to (65-70) uA


* LH2 target boiling caused by hallA 15k He leakage event and will not affect hallC target anymore at least till Saturday day
* scifsgw10a:/lustre2 mount is having issues -- /cache, /volatile, /work are offline  https://logbooks.jlab.org/entry/3611210

==Planned access to the Hall C==
* Monday October 22 8am controlled access for Dave Meekins deuterium target work
* Tuesday October 23 8am controlled access for SHMS aerogel exchange Vlad, Larry, Jerry, Stan and Rob

We will meet today at 4:30 pm on the second floor of the counting house.

To join the Meeting:

To join via Room System:
Video Conferencing System: bjn.vc -or-
Meeting ID : 861439920

To join via phone :
1) Dial:
+1.408.740.7256 (US (San Jose))
+1.888.240.2560 (US Toll Free))
+1.408.317.9253 (US (Primary, San Jose))
(see all numbers - http://bluejeans.com/numbers)

2) Enter Conference ID : 861439920


This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3611558
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/hallc_running/attachments/20181018/b7a93f6d/attachment.html>

More information about the Hallc_running mailing list