Minutes of HERA/Experiments Coordination Meeting  04.03.2003

Startup after Shutdown

• F.Willeke presented a preliminary schedule for HERA operation after the shutdown, see transparency. The machine will start up 10.07.2003. Three weeks of beam bake-out at 12GeV are presently foreseen to condition the vacuum. One week is planned for polarization studies. Luminosity operation is scheduled to start 15.09.2003. The expected integrated luminosity is about 20pb-1 There was no objection to the schedule.
• The details of the start-up are not yet yet fixed. Conditioning the interaction region vacuum by flushing the with hot nitrogen is being considered.
• The wire alignment system will be repaired during the shutdown. New wires will be installed. Beam based alignment will be performed after the restart of beam operation. The tools are available.
• Some background studies will be repeated after the shutdown. A schedule will be prepared.
• It is not yet clear whether HERA B will continue data taking after the shutdown, see transparency shown by M.Medinnis. A final decision will be made until May. The HERA B detector should be moved to the park position in case the collaboration decides not to continue data taking. Preparations for removal of the vertex tank and central beam pipe will be made.

Uwe Schneekloth