Mar, 06 2014 12:53:12
Change in SR RF phase yesterday afternoon
A change in the RF source yesterday afternoon around 16:15 resulted in a
SR RF phase phase shift of about 23 deg. Operations adjusted the SR RF
phase to recover top-up injection efficiency. . From that time to
approximately 04:00 this morning the phase may have been slightly less
stable than it normally is. The RF source appears to be stable after
04:00 so the phase should be stable, but one of the RF source parameters
did not return to its nominal value. We do not see any effects on the
electron beam--no increased motion and no apparent instabilities. The RF
Group are set up to troubleshoot the problem, but there is nothing that
can be done during User operations since it might affect the beam or
possibly cause a beam loss. We will keep you informed if there are any
changes. Please feel free to e-mail me at schroedr at anl.gov if you have
Storage-Ring Chief of Operations
Mar, 06 2014 07:17:02
The fill-on-fill with shutters open is complete, top-up is ongoing.
Mar, 06 2014 06:39:12
Top-up resumed at 06:35/Fill-on-fill scheduled for 07:10
With ~75mA stored beam, top-up was resumed at 06:35 3/6/14.
A fill-on-fill with shutters open is scheduled for 07:10.
Mar, 06 2014 04:44:21
Top-up aborted at 04:40
Due to a feedback IOC issue, top-up was aborted at 04:40 3/6/14.
Mar, 06 2014 04:42:59
Top-up restarted at 00:22
The IOC issue has been resolved. Top-up was restarted at 00:22. There are ~87mA stored beam.
Mar, 06 2014 00:05:17
IOC issue: orbit controllaw, real time feedback,
and top-up aborted
Due to an IOC issue, orbit controllaw was interrupted at 22:43. There has been consistant beam motion in excess of specifications since ~23:07. In order to investigate the issue, top-up and real time feedback were aborted at 23:24.
Stored beam dropped below 100mA at 22:31. The IOC investigation is currently ongoing.
Mar, 05 2014 17:06:09
At ~17:02 the Storage Ring Phase was adjusted ~23 degrees.
Mar, 02 2014 12:41:36
Top-up Aborted and Resumed.
On March 2nd, 2014 at 12:27PM, Top-Up was temporarily aborted due to an injector issue. Top-Up was resumed at 12:37PM with ~99mA of stored beam.