ISA meeting

Week 17, April 27, 1999.

Status of the ring: Electron run 1/99 ended yesterday morning, and except for the last two days, beam current and lifetime were good, but degradation of the microtron gun cathode caused the beam current during the weekend to be lower than usual, but still usable for most of the users. However, the past run has been our most productive ever: We have produced more photons and have had more beamlines operating than ever before. Initial currents were around 150 mA with lifetimes in excess of 30h.
If you have suggestions for modifications of beamlines for the next electron run, starting in August 1999, please let us know as soon as possible.

The microtron was opened yesterday to have a new gun cathode mounted. It is now pumping, and the cathode is being outgassed. We hope to have it back in operation in a few days.

Ion run 1/99 will start next week. There have been some problems with the new RF-chamber and the new separator acceleration column, but everything will be mounted, pumped and baked this week. The laser cooling group will start the run, and with a little luck it will start as planned in the middle of next week. Some of the ions we had planned to test before the run started will instead be tested on the ELISA separator next week.

The application for ASTRID II were unfortunately not approved by Grundforkningsfonden. The consequences for ISA and IFA are unknown.

ELISA is getting colder - she is now at -30^oC, and running C₂H₂. The plan is to go down to about -40^oC, but already now, beam lifetime is almost twice as long as in the uncooled machine.

Goodbye and good luck to Dorrit Zenner Torp and Lars Therkelsen, who will be leaving us at the end of this week. There will be a small reception in 525-214 (next to the ISA Control Room) on Thursday April 29 at 14:00.

27/4 1999 / +spm