ISA meeting

Week 31, July 28, 1998.

Status of the ring: During the past two weeks, we have been preparing for Electron Run 2/98, which will start next week. We suffered a setback last Saturday, when there was a 5 minute power failure, which caused several problems. These have been fixed, and at present, everything looks good, and will start injections tomorrow, planning to have beam for users from Monday on.
The microtron is again running well after a cathode failure last week.
All modifications to the ring have been made: The cavity and undulator chamber are mounted and baked, and the cavity has been conditioned. The cavity vacuum is in the low 10-10 range, which is better than we have seen earlier.
The separator has been taken apart, and the separator magnet and parts of the old injection beamline have been removed. A simple beam tube has been mounted instead. The separator will be set up again in the new injector room (the current EBIS room), and the injection beamline will be reestablished in time for Ion Run 2/98, which will start in week 44 (Oct. 26).

Cooling water: The heat exchangers are being renovated today, so the old hall is without cooling water until sometime this afternoon.

The new control system now controls all ring parameters. The changeover has gone as scheduled. The old ASTRID system will be kept running for some time yet, until we are convinced that there are no major errors in the new system.

The SX-700 beamline is ready, and the first users will arrive from Berlin on Thursday. This group will use the system for 2 weeks.

The SGM I is getting new software, in order to be ready for Per Morgen, who will use it for the next two weeks, after which there will be two weeks of maintenance, during which motor 2 will be changed.

The Onduline: A leak has been found in the laser window. A replacement window will be acquired.

The SGM II monochromator has been baked, but not all parts are yet satisfactory. Also, new jaws are being made, and the grating is still to be delivered.

ELISA and the injector are back together, and have been baked.

The EBIS is running better than ever before. Thanks to good advice from Leif Liljeby, who visited us two weeks ago, it can now run with 5 kV acceleration voltage, and produce a 220 mA electron beam. Further injections tests will await the mounting of the ring separator and beamline.

Karsten Telling Nielsen will return to CERN next week. Good luck, Karsten!

28/7 98 NH+SPM