Minutes of HERA Meeting      1.03.2005

HERA

• Summary of cryo problems last week: writeup by F.Willeke.

• Proton magnet power supplies SR were checked during the break. No problems were found. A short in one of the BU magnets SR is a possible source for the spikes.
• The proton orbit feedback will be used to stabilize the beam position and hence reduce spikes due to orbit movements.

H1

• Spikes, causing CJC HV trips, were also present during the electron only fill. The time structure was similar to the one of the large proton spikes.
• The present fill had large synchrotron radiation background. It was improved by orbit tuning.

ZEUS

• A 4krad dose was received in the MVD radiation monitor last night when the electron beam was lost. The radiation monitor tripped and caused some delay.

Schedule

• Continue luminosity operation with increasing bunch currents.
• The maintenance day next week was discussed. Regeneration of NEG pumps in the north IR does not make much sense since the integrated electron current is small. The date of the access will be fixed tomorrow.

                Uwe Schneekloth