Minutes of HERA Meeting      29.01.2002

HERA

• The repair of the damaged support of the proton beam pipe at SR130 is still going on. It won't be finished this week.
• Positron beam machine studies have been performed during nights and weekends starting last Thursday and will be continued until the repair is finished. The present studies are done at injection energy. Acceleration is not possible until the He flow/pressure at the super conducting cavities is increased, will be done soon.
  • The beam aperture in the arcs is presently limited to about 25%, studies in progress.
  • Several studies in order to improve the understanding of the synchrotron radiation background will be done this week: background conditions in forward detectors with improved shielding, use large vertical beam tilts at BI magnet, movement of magnet bridges.
  • A ground fault of the GJ magnet SL was found on the weekend. It was caused by lead wool, which was removed yesterday morning.
  • The effect of moving the ZEUS F/RCAL will again be checked Friday evening.
• Fabrication of the new collimators is progressing as scheduled.

                  Uwe Schneekloth