Run Meeting: March 4th, 2019

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3:30PM Run Meeting, Counting house meeting room (200C)

RC: Jinlong Zhang

Status

Beam down from Friday night to Saturday later afternoon Friday ~22:00: Beam down due to the cavity/vacuum (1L25-8/1L26) issue at north linac ; Beam restored Saturday ~18:00; 18:00-19:00: escorted access for VDC Left U2 cable checking ); Back to production.

Productively collecting data over after the downtime.

Last night ~21:53: Bogdan increased the HV for Left VDC, from -3500 to -3600. Efficiency improved.

CODA stopped working earlier this morning ~6:00, from run 4585. Fixed by Alex.

Beam study this morning has completed. We are back to production.

Links to the shift summaries:
Mar 1 Swing: https://logbooks.jlab.org/entry/3661962
Mar 2 Owl: https://logbooks.jlab.org/entry/3662024
Mar 2 Day: https://logbooks.jlab.org/entry/3662128
Mar 2 Swing: https://logbooks.jlab.org/entry/3662283
Mar 3 Owl: https://logbooks.jlab.org/entry/3662400
Mar 3 Day: https://logbooks.jlab.org/entry/3662530
Mar 3 Swing: https://logbooks.jlab.org/entry/3662666
Mar 4 Owl: https://logbooks.jlab.org/entry/3662809

So Far

Taking production data, Tungsten 2.8% @30uA.

Plan

Continue with production on tungsten until tomorrow ~8:30.

Beam energy reduction: from 2.221 GeV to 2.139 GeV (~4%):
The change with take place tomorrow and is expected to be completed during tomorrow swing.
Kinematic setting will be accordingly changed.

The RF recovery was planned from 8:30 to15:00 tomorrow. This will be covered by the energy reduction setup.

The Hall will be in controlled access.
- Switch the right arm polarity, from positive to negative, for the optics data.
- Roman: need access to Hall A tomorrow to reboot Moller DAQ crate (~10 min) and to check Left HRS VDC realy box (1-2 hours).
- Doug will be available to provide the Hall walk-through training tomorrow, during the RF recovery. If anyone wants to take the training, please let me know.

Slides/Links

MCC scheduling Whiteboard: http://accboard.acc.jlab.org/

APEX wiki page: https://hallaweb.jlab.org/wiki/index.php/APEX

Bluejeans connection information

To join the Meeting: https://bluejeans.com/256205934

To join via Room System: Video Conferencing System: bjn.vc -or-199.48.152.152 Meeting ID : 256205934

To join via phone : 1) Dial: 

  +1.408.740.7256 (United States)
  +1.888.240.2560 (US Toll Free)
  +1.408.317.9253 (Alternate number)
  (see all numbers - http://bluejeans.com/numbers)

2) Enter Conference ID : 256205934

Slides/Links

MCC scheduling Whiteboard: http://accboard.acc.jlab.org/

APEX wiki page: https://hallaweb.jlab.org/wiki/index.php/APEX

Bluejeans connection information

To join the Meeting: https://bluejeans.com/256205934

To join via Room System: Video Conferencing System: bjn.vc -or-199.48.152.152 Meeting ID : 256205934

To join via phone : 1) Dial: 

  +1.408.740.7256 (United States)
  +1.888.240.2560 (US Toll Free)
  +1.408.317.9253 (Alternate number)
  (see all numbers - http://bluejeans.com/numbers)

2) Enter Conference ID : 256205934

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