Electron run 2/98 will start in August, so now we should start thinking about modifications, such that everything can get ready for the next changeover in week 29-31.
The onduline group last week observed a change in photon beam position in the reaction chamber with varying undulator gap. This cannot be observed on electron beam by the ring pickups, so there may be an alignment problem in the monochromator.
The Microtron will have its new cooling system mounted next week. At the same time, the machine will be realigned and trimmed in an attempt to get back to the good old days, when we routinely had 10mA/1µs pulses.
The new control system is being checked during this changeover. TW reports, that everything is moved to the new system, including the ramping system. It will be changed back to the old system before the ion run starts, because crucial parts are still missing, especially for running electron cooler experiments. So far, no problems have been found.
The EBIS problems, concerning two HV-supplies, have been fixed, and we are now ready to
attempt simultaneous injection and extraction of a separator beam. Just now, we are fighting
electrical noise from the RF source. As soon as that is under control, we will continue the
commissioning.
21/4 1998 NH + SPM