Minutes
from REX integration meeting
Present: Mats Lindroos (chair), Luis Fraile,
Pierre Delahaye, Fredrik Wenander
1. Planning and general issues
* No changes to the
REX operation schedule foreseen until now.
* Beam should be on
time for IS423. Beam tuning support by the EIC from HRS to REXTRAP is
requested.
The target at the HRS
is most likely going to be displaced by 10 mm. This will complicate the beam
transport at ISOLDE.
* The future run with
AlF was discussed. A large (10 nA) contamination of CO2 with A=44 coincides with the
AlF, therefore another carrier such as Ca, Ba, La has to be considered. The creation efficiencies, the
breakup in the trap, the beam intensities and the test schedule has to be
discussed with Ulli, Pierre, Fredrik and Luis at some
point.
* At some point test
of SeCO+ injection into the EBIS has to be carried
out.
2. REXTRAP and REXEBIS
* Some complementary
tests with the rotative wall cooling (efficiency vs beam intensity, amplitude) are carried out by Romain Savreux and Ivan Podadera.
* The Trap beam gate was
not working. A failing NIM to TTL converter was the reason. Now
exchanged.
* The installation of
the Li-prepared ion source to the Trap has to be postponed until after the 27/7.
* The pumping on the
EBIS OVC was stopped on Monday morning. A pressure of 1.1E-4 mbar was reached.
The EBIS solenoid was thereafter cooled down again and energised.
Too early to say if the boil-off rate has been improved or
not. Electron beam running in the EBIS.
* Lisa and Anne have
started setting up the electronics for the Si and scintillator detectors after the trap and the REX mass
separator, respectively. Tests will be carried out in connection the next run
with radioactive beam.
* The three REX FECs
have to be rebooted frequently; particularly the Beam Diagnostics FEC. Ivan Deloose
will look into the problem. After the upgrade to XP the EBIS FEC has problems
with the VME card. The vectors sent to the GFAS modules are not correct. In
this state the EBIS can not be operated, and one has to consider changing back
to NT OS. Joakim and Ivan Deloose
are addressing the problem.
Notes by Fredrik Wenander