Minutes of HERA Meeting      09.04.2002

HERA

• The plan of last week was to increase the beam intensities and to establish the procedures for luminosity operation. Good progress was made until Saturday.
  The luminosity files are not very reproducible. Beam orbits are now compared instead of using the magnet settings. A vertical movement of the IR bridges was observed by the wire alignment system, probably due to temperature variations.
• The power glitch on Saturday caused severe problems. One of the HERA RF transmitters and the timing system (PETRA and HERA) are not working properly. Proton injection was not possible. HERA continued with positron beam operation.
• Proton injection was established again just before the meeting.

ZEUS

• The movement of the GO magnet was measured during the access last Tuesday. An additional support was designed and is being fabricated. The earliest installation date is Friday or more likely early next week.

H1

• Was prepared to switch on detector components on Saturday when beam was lost.

HERMES

• Was prepared to switch on detector components on Saturday when beam was lost.
• The beam position and slope at the IP was set to the nominal value.

HERA B

• Requested four shifts of stable proton beam for data taking. Need at least 60 bunches. Could run parasiticly. See ps file for details.

Schedule

• Re-start proton machine.
• Try to establish luminosity operation.
• The schedule for the weekend will be discussed Friday 15:00hrs, HERA control room.
  

• The next scheduled maintenance day is Tuesday 7.05.2002.
  

• H1 is the coordinating experiments.

                Uwe Schneekloth