[Hallc_running] [New Logentry] RC daily update

hszumila at jlab.org hszumila at jlab.org
Tue Feb 19 09:50:02 EST 2019

Logentry Text:
Last night we closed up the Hall around 5:30pm and started to receive beam on the #1-1 LH2 kinematic setting. Most of the night was around 40-50uA, but the PD is trying to understand why we were placed on 10uA for a period of time. Around 4:30am this morning, the HB threw an interlock-it appears that the current lead mass flow meter read back was no responding. We tried to power cycle the controller in the Hall, but it did not come back. We are now in Restricted Access while the accelerator does RF Recovery. Bill Gunning confirmed that our raster last night and this morning is fine (on the scope), but the board that sends the signals in the IOC appears to be doing something funny and showed the ripple on the online display (it's not real). In any case, he will replace the board today to see that the signals match what's on the scope. Steve Lassiter is in the Hall to supervise back flushing of the magnet power supply water lines, and he is replacing the HB current lead flow meter. He 
 will also continue work to minimize the ringing in the HMS Q2 power supply. We will begin lockup around 2:30pm this afternoon. 

Please take note of the shift crew notices posted here: https://hallcweb.jlab.org/wiki/index.php/RC_Meeting_and_Run_Plan,_Tuesday,_February_19

We will meet today at 4:30 pm on the second floor of the counting house to discuss the current status and run plan. Here is how to connect:

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/3656028
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