CAT Chat Minutes

October 16, 2006

Announcements/Schedules Update, Mark Beno

Beno reviewed the APS downtime report for the preceding seven days:

  • Downtime for Fill #2: intentional dump; end of period
  • Downtime for Fills #3 and 4: two separate BPLD trips; still under investigation
  • Downtime for Fill #5: MPS S39 water/vacuum latch card fault; under investigation
  • Downtime for Fill #6: S14A:P0 glitch caused beam loss; after loss, S31-ID SS2 had a no switch fault that prevented storage of beam. Problem will be repaired during machine studies
  • Downtime #556: Due to a crack in a plastic air line, shutter lost air pressure; airline has been replaced and shutter is operational
  • Downtime #557: SS2 No switch fault: problem under investigation

Safety, Edmund Chang

Chang reported that Jim Lang, the coordinator for the electrical equipment inventory for the APS, will be making a presentation on the logistics and scope of this inventory to those responsible for conducting it. The APS contribution to the Laboratory inventory is due on December 15, 2006.

APS Start-up Issues, Michael Borland

Borland reported that the start-up problems this run were caused by three major issues:

  • The machine was simply not ready; it was brought up in 45 minutes rather than the usual four hours.
  • ASD has no formal specifications on beam stability.
  • Communication between the floor and the control room was not good.

Potential solutions/improvements:

  • Institution of a formal readiness checklist
  • Establishment of an 8-hour buffer/shakedown period at the beginning of a run (to be taken from machine studies time
  • Use of a beam stability questionnaire to record complaints (this could be an on-line form or a checklist for the control room to record information from calls

Beno reported that we are working on another mechanism through which users can communicate with each other and with the APS about problems on the floor. We will explain the system to users as soon as it is available and has been tested.

Experiment Safety Assessments, Bruce Glagola

Glagola reported that there recently had been five cases of approved ESAFs that were not complete. He stated that at this point, about 50% of the ESAFs come in with less than the required seven-day noticeand 12% come in on the day the experiment is scheduled to begin. This situation is not acceptable and may soon result in failure to let the experiment proceed.

In response to a question on liability, Glagola reported that ESAF policy stipulates that if a user brings something not on the ESAF list and the hazard class changes as a result, the ESAF must be re-approved. The on-site spokesperson is accountable; it is this person's signature that stipulates that all information on the ESAF is correct and that all persons on site are listed.

Follow-up to Previous Issues, Mark Beno

Beno reported that the liquid helium supply may become tight; users and staff are encouraged to plan ahead. The problem stems from an international shortage of reprocessing facilities.

Tricycle safety is becoming a concern. If users see someone riding a trike incorrectly, please notify the floor coordinator on duty.

The liquid nitrogen supply should no longer be an issue. There is now an increased fill schedule and closer monitoring of levels.

Next Meeting

Monday, October 23, 2006.