ISA meeting

Week 22, May 26, 1998.


Status of the ring: The laser cooling group started their 100 keV Mg+ run last week, and the ring has been running very well, . There have been some problems: The top scraper coupling broke, such that the scraper has to be held in a fixed position away from the beam. This is not serious, and repair can await the next shutdown. A more serious problem was discovered last week: The post acceleration tube connection was broken inside the chamber. This was fixed, and this small section of the ring was baked Friday. Now, everything is working well for the group.

The EBIS beamline may have to be equipped with more steering before it will be possible to inject and extract a separator beam. When some of the parts being made for the new injection beamline are ready, we will consider using some of them for the EBIS beamline.

The microtron is now running with the new circulator, and is producing more positrons than ever before. Still more work is needed to get a larger pulse, but it is already improved relative to what it was before the circulator installation.

The new control system will be installed everywhere during the next shutdown, after which the old NORD control computer can get a well deserved rest. TW asks for ideas and suggestions to what could be improved before the final installation. Besides all current controls, new ones such as undulator energy scanning with automatic vertical excitation frequency will be added. TW has almost finished the console program documentation. It may be found on the net at the address: http://isals.dfi.aau.dk/Denmark/UserManuals/Console/Console.htm

The unduline is progressing according to schedule. Work is presently being done on installation of SGM2 and the ion source. Ion source tests should start next week.

26/5 1998 NH