Minutes of HERA Meeting      04.09.2001

Summary of HERA Status,   F. Willeke

Commissioning of the proton machine went reasonably smoothly. The beam
was successfully accelerated to 920 GeV. Turning on the electron ring was
much more difficult. It took about one week to get the positron beam through
H1. The reason was a defective GI magnet. One of  the coils had a short,
which was repaired last week. There are still some anomalies. Very high
currents are needed for the GO and GG correction coils at the north IR. Orbit
studies indicate that there are large  magnet offsets,  which does not agree
with the survey. The magnet currents in the south IR are close to the design
values. Yesterday, the positron beam was ramped to 18 GeV.
The commissioning is about 3 weeks behind schedule. F. Willeke will present
an updated schedule in two weeks.

Details of the HERA commissioning can be found in the weekly  weekly summaries
and  shift summaries .

During the first weeks of proton operation the neutron background in the
north and south halls was significantly higher than during normal HERA
operation. The radiation safety group has therefore asked to install the
missing shielding in the north and south hall.

HERA Access Days

The missing shielding will be installed Monday and Tuesday  next week.
The access will start at 7:00 hrs. It will end when all shielding is installed.

The next maintenance day, 24.09.2001, will stay as scheduled.

The next HERA meeting is Tuesday, 18.09.2001 11:00hrs.

                Uwe Schneekloth