ISA meeting

Week 8, Feb. 17, 1998

Status of the ring: In the past week, stored currents have typically been 100-120 mA. Since the ring has been opened since the last run, outgassing is severe, initially limiting beam lifetimes to a few hours. After one week, lifetimes are up to 5-6 hours at 100-120 mA. This number will gradually improve over the coming time.
Yesterday, the undulator was repositioned slightly, giving a better yield. The electron beam in section 2 has also been moved a little bit. The effect on other users should be minimal, but readjustments may be necessary.
The injection speed is now almost as good as in the previous run, and we expect to be able to reach currents in excess of 150 mA soon.

The Microtron has had problems with water in th RF-waveguide. Last night, the system was heated and pumped out, and we expect the problem is solved. Even if it is not, we will be able to run normally, since the waveguide can be cleaned between injections.

The new laser positioning system on the Miyake monochromator works very well! Today, some further positioning will take place, and tomorrow everything should be ready for mounting the David Field chamber.

The ISA Status page has been completely modified. You can now see the current status of our accelerators, updated every minute. During electron runs, the beam current and lifetime, undulator position, beam energy etc. are displayed.
You can find the page via the link on the ISA main page (http://www.ifa.au.dk/isa.htm), or in case you want to go directly to the new status page, the address to use is: http://isals.dfi.aau.dk/isa/isastatus.html

The Onduline is progressing: SVH is planning the vacuum interlock system, and AP is busy getting the wiring ready.

17/2 1998 NH+SPM