[Hallc_running] [New Logentry] RC Daily Update

munoz at jlab.org munoz at jlab.org
Sat Dec 8 19:55:03 EST 2018

Logentry Text:

- Beam availability overnight was somehow small (3.5h ABU). MCC had problems with beam delivery to Halls D and B and spent a significant fraction of the time troubleshooting. We took data smoothly on our side when beam was available. The missing reference time issue seems to have gone away.
- Beam during day shift has been good. We had an issue with the SHMS Q3 interlock. Communication was lost from the magnet to the PLC. This required an escorted access (by Jack Segal) to power cycle the IOC. This was supposed to be on a remote switch, but that didn't work (to be checked on Monday). We lost 1h15min of beam due to this.
- The rest of the day we have been running well. As planned, we have been cycling over 3 different beam currents every shift. We will continue to do this until Monday morning.

Beam will stop at 6AM on Monday, and we'll go to restricted access. Shift leader positions are cancelled on Monday DAY, Monday SWING and Tuesday OWL. Target operators must come in, though. Stay tune for the situation after that (most likely SL will be on call on Tuesday).
Notices in effect for shift crews:
- Shift leaders, please fill out the check list once per shift.
- Shift leaders, please do a quick cross-check of the BTA numbers against your shift summary.
- Check that the pre-scaler gui is active and hasn't frozen / doesn't need re-started.
- Be on the lookout for any errors when running the replay, particularly errors concerning missing reference times.
- Note the new beam positions for this energy (on the whiteboard / note on wall)
- NB If the HV trips for SHMS S1Y5B contact Simona M. '''DO NOT change the HV from the nominal value!'''


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/3636512
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/hallc_running/attachments/20181208/09f938d8/attachment.html>

More information about the Hallc_running mailing list