[Hallc_running] [New Logentry] RC report Dec 2

jones at jlab.org jones at jlab.org
Thu Dec 2 09:20:02 EST 2021


Logentry Text:
--
Previous activity

Set to take production data at
Q2=3.85, W=3.07, x=0.31, low epsilon, HMS angle=35.12 deg, HMS momentum = -1.332 GeV/c, SHMS angle= 8.39deg, SHMS momentum=-6.538 GeV/c;


Day -  no beam
     1) down all shift for ACC RF maintanence
     2) work done to replace SHMS UPS batteries
     3) preventative pumping on transfer line to prevent ice build up.

Swing 
     1) Problems with Hall sweep because HMS door would not open. Joe Beaufait called to fix problem
     2) when beam delivery started raster coil Ax failed. Decided to run with one raster coil pair.
     3) By last 1/2 hour of shift was able to start a production run.

Owl
    1) Production data taking for first four hours but beam not good
    2)Around 4am MCC had problem in injector. Did not recover unitl about 8:15



Run plan for Wednesday Dec 2:

-- Day: Q2=3.85, W=3.07, x=0.31, low epsilon, HMS angle=35.12 deg, HMS momentum = -1.332 GeV/c, SHMS angle= 8.39deg, SHMS momentum=-6.538 GeV/c; Data taking-- 
-- SWING: Q2=3.85, W=3.07, x=0.31, low epsilon, HMS angle=35.12 deg, HMS momentum = -1.332 GeV/c, SHMS angle= 8.39deg, SHMS momentum=-6.538 GeV/c; Data taking-- 
-- owl: Q2=3.85, W=3.07, x=0.31, low epsilon, HMS angle=35.12 deg, HMS momentum = -1.332 GeV/c, SHMS angle= 8.39deg, SHMS momentum=-6.538 GeV/c; Data taking

At some point during the late day shift or swing do beam energy measurement

Pending issues
1) Elevator is not working
2) Repair raster coil Ax

RC meeting:

Let's have a meeting today at 10:00 AM EST.
Connection information: https://bluejeans.com/861439920




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