Minutes
from REX integration meeting
Present:
1. Planning and general issues
*
* The updated budget
for REX can be found at http://isolde.web.cern.ch/ISOLDE/,
REX integration page.
* Two financial
posts, the purchase of a spare VME card for the EBIS (~3000 euro) and TREK steerer supplies (~12300 CHF), have been taken by
*
* The migration of
the REX control computers from NT to XP continues. A summary of what has been
done is given below. Not mentioned there is that the remote control for the
9-gap resonator is also finished. Ivan will also look into the slow extraction,
and upgrade remaining consoles to XP.
FONSKE:
-------
- 2 new METEOR2 frame
grabber cards ordered and installed. No major problems to adapt/recompile the
equipment modules.
- RS485 ISA card replaced
by RS232 adapter box and equipment module updated by Paul Van Den Bergh.
GRIZZLY:
--------
- New Hallprobe card ordered and installed. No major problems to
adapt/recompile the equipment modules.
- Old Applicom card (from F. Locci)
installed but could not run under XP. Upgrade package (EPROM, driver +
libraries) was required. This was ordered from HD Techonology
and installed. Slave configurations
transferred
from old FEC.
KOALA:
------
- Old Applicom card (from F. Locci)
installed but could not run under XP. Upgrade package (EPROM, driver +
libraries) was required. This was ordered from HD Techonology
and installed. Slave configurations transferred from old FEC.
- PCI-VME bus adapter
card taken out from old FECs, downloaded new XP
library from SBS web site. Update of the GFAS and GFASGDG DLLs for new library.
2. REXTRAP and REXEBIS
* The gun cathode in
the EBIS has been changed. 220 mA electron beam has been reached, but the losses are higher than
normal, and loss current runaways are occurring. Under
investigation.
* After the cathode
change the vacuum system was baked out. Because of a different baking cycle an
improved vacuum compared to last bakeout was
obtained.
* The superconductive
cryostat of the EBIS was warmed up to LqN2 temperature. The OVC was leak tested
from the outside, without any leak to be found. The OVC was also pumped on an a slight improvement of the vacuum was reached. The
system has been re-cooled to LqHe temperature.
* Due to the
reoccurring problems with the REXTRAP VME action was taken and the AB/CO group
was involved. The REXTRAP VME was exchanged for the spare VME from ISOLTRAP.
The spare VME started and passed the selftest, but
could not fully run the REXTRAP processes. When re-inserting the REXTRAP VME
card, this did not even pass the selftest. With the
present situation the REXTRAP can not be operated. Frank Herfurth
and Dietrich Beck at GSI have been contacted for a solution. A
resurrection of the ISOLTRAP VME or a migration to a SHIPTRAP Labview system are considered. The AB/CO has no
resources, and estimates the work to 6 man months. A AB/CO system can be
operational in two years from now.
* A summer student
allocated to Fredrik will arrive the 29/6. Electron beam simulation in Opera
and a user friendly charge breeding calculation programme
are two tasks in mind.
3. LINAC
* Thomas is requesting Cs beam for setting up the linac. Due to the present problems with the trap control
system and the overload of work, this has been postponed, and the setup has to
be done with residual gas beam from the EBIS.
* All amplifiers have been started successfully. The
water and air cooling is working.
* The 200 MHz amplifier is limited to 90 kW, that means a final energy of ~2.9 MeV/u.
Notes by Fredrik Wenander