Minutes
from REX meeting 2005-04-22
Present:
General issues
* Comments to
last week’s minutes. Thomas will do the alignment of the mass slit in the beam
diagnostics box himself as the integration of the alignment group has come to a
halt.
* A PhD student from Jyväskylä is scheduled to come down for two periods; 4/7 to
8/8 and 28/8 to end Oct. He will work together with Fredrik and Pierre on REX
and the ECRIS charge breeder.
*
Thomas, Fredrik and Mats should look into the budget at the next meeting. Peter
should verify if he can contribute with 25 or 50 kCHF
from the Physics group account this year.
* Miniball has asked for x-ray shielding of the 9-gap
resonator. It is still not evident if it contributes significantly to the
background level. When the full setup of Miniball is
operational a dedicated test with and without 9-gap on should be carried out.
Meanwhile,
*
Mats has spoken to S. Myers about the support from the
BD group. There will be fire brigade tactics for the hardware until 2008, with
a very limited support. The Russian project associate will come and work full
time on the software migration for two years.
*
Both Thomas and Fredrik are astonished how long time it takes to order things
with DAI. The absolutely quickest time to get a delivery from outside
Controls system etc
*
The beam diagnostics system is now running again. Some dll
files were missing and networking problems with the FEC PC. It is still not
running at the new XP machine at the TRAP but the control system experts are
looking into it.
*
Roman is continuing working on the interface to the new CS of REXTRAP.
*
Nikolai has performed tests with the RF system, checking the frontends. Problems with the
REXTRAP and REXEBIS
* B.
Crepieux is taking over the coolant filling of the
TRAP and the EBIS.
* It
is foreseen to start the trap next week to verify that a 40-50%
efficiency can be achieved with the new control system. Thereafter the beam
will transported through the beam transfer section (BTS). If the power supply
to the emittance meter arrives the emittance measurements will be resumed.
Possible also Li injection from the trap ion source into the trap will be
tested and cooling with alternative buffer gases.
* An
ISOLDE target with Al is prepared so AlF injection
into the trap/EBIS can be tested by leaking some fluorine compound gas into the
target. The test is foreseen for the 10/5 if the EBIS is up running.
* For the Xe run
we are preparing the possibility of connecting isotopically
enriched 130Xe to the EBIS. The bottle is available from the Physics group.
* Still not received the ordered NEG
strips (see comments above about delay of orders). Fortunately some strips were
found at
* Due to an air leak in the needle valve at
the beginning we might have saturated the NEG strips during bakeout.
If so, they can not be regenerated but has to be exchanged. We don't want to
think about that scenario. We'll know on Monday when the system is cold.
* An offer to
install a draining pump to lower the pressure after the EBIS has been provided
by D. Gros. Overall cost incl
installaion 4500 euros, 6 weeks from ordering.
Drawbacks: expensive, noisy, long delay. Moreover, already at relatively low 2 bar return pressure for the cooling water the newly produced
cooling tube from
LINAC
* Berdermann from Bertronix is
here. He is working on the cooling of the cavity in the 200 MHz amplifier, to
reduce that from 80 to 40 deg C. A test run foreseen
for the near future. Also Berdermann complained about
the low quality of the installation of the new air cooling system.
* Thomas has
asked for an improvement of the installation of the air cooling system.
* Still some
tuning to be done as the nominal output power value is not reached.
* The electronics
workshop in
* The alignment
of the mass slit in the beam diagnostics box after the separator remains to be
done. This is difficult due to the long viewing distance.
* The dust
cleaning of the Linac is still to be done. Thomas
will contact an external company.
Minutes
taken by Fredrik Wenander