BL1A Problems - Beam Schedule 123
Science Division
sciencediv at triumf.ca
Tue Oct 9 12:27:41 PDT 2012
Dear TRIUMF Users, Experimenters, Operators and Staff,
Due to reoccurring vacuum leak problems at the BL1A T2-M9 interface, a
decision has been made in collaboration between the Accelerator Division
and the Science Division, to blank-off this beamline. The vacuum leak,
caused by an indium seal, is at this point no longer sustainable in
terms of operation, even though we have added substantial pumping over
the long weekend.
The blank-off procedure will commence today during the maintenance day
and is scheduled to be finished October 24th, 2012. Beam is expected
restored back to the beamline on October 25th, 2012.
This blank-off has a number of consequences:
* During the blank-off procedure there will be no beam to BL1A (hence
no experiments will be running on M9, M11, M13, M15, and M20, as
well as PIF/NIF)
* After the blank-off there will be no beam available for experiments
on M9.
* The on-line Schedule 123 will reflect the time when no beam is
expected, and will continue with already scheduled activities once
beam is back.
Due to this interruption of beam delivery to BL1A we are considering an
extension of the high intensity operation, which is currently scheduled
to end Dec 4 2012. We have to evaluate the impact on the shut down
schedule as well on effected users, before a final decision is made.
I apologize for this interruption and please feel free to contact me for
further details or if you have questions
Jens Dilling
--
*********************************************
Dr. Jens Dilling
Head Nuclear Physics/ISAC TRIUMF
Physics & Astronomy University of BC
Tel/Fax 1 604 222 7413/1074
JDilling at triumf.ca
www.triumf.ca/titan
*********************************************
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