CAT Chat Minutes

July 09, 2007

Operations Update, Mark Beno

There were two drops this past week, one caused by RF vacuum problems and the other dealing with a power supplies for a valve in the Sector 3 front-end.


  • 98% - Scheduled Beam Time
  • 80 hours - Meantime between faults

Safety, Edmund Chang

Chang announced that there will be a DOE Laser Workshop held here on July 17--19, 2007. A number of people will be attending the workshop, which will focus on safety and the latest research in the laser area. Part of the workshop will include a tour of Sectors 7, 13, and 15, so Chang asked that each sector clean its designated area on the experiment hall floor. Tours of the APS are also planned for August and September.

User Training, Bruce Glagola

Glagola informed the group that the trend is getting better in the user training area. The wrinkles are being worked out, and there is a definite improvement.

Glagola also told the group that he will be out of town for five days beginning on Saturday, July 21st and will have limited communication capabilities. Also, on August 9--19, 2007, he will be on vacation and not have communication capabilities. If assistance is needed during these timeframes, please see Nena Moonier, Edmund Chang, or Paul Rossi.

Changes to RMS BPM Calculations, Om Singh

Singh informed the group of the upcoming changes to the RMS BPM calculations. These new plans change the processing of BPM set of up to 80 BPMs and freeze RMS motion processing for ~30 ms after injection during top up mode.

Singh explained the reasoning behind the decision to change. The present P1 BPM set electronics was optimized for the BPLD system but has a higher AC noise level as compared to other BPMs. The RMS readback equals real orbit RMS plus AC noise. Due to incremental AC orbit stability improvement, real orbit RMS motion is less than or equal to the AC noise level of these BPMs. The present P1 BPM set is not used in RTFB. Singh announced that these changes will be implemented tomorrow, Tuesday, July 10, 2007, and asked the group if this would present a problem to any of them. No one present indicated that this would be a problem.

Next Meeting:

The next CAT Chat meeting will be held on July 16th at 3:00 p.m.