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DROPPED. WORK organised / done by or with ATB/EA. Repair of ‘guillotine valves’ Repair converter (just after T4 TAX – quite radioactive !) Invert order of FISCs (AB internal) Vacuum in KABES region Reading of vacuum pumps Magnetic field settings and readings - PowerPoint PPT Presentation
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LG, 15 March 2007 ATB work for 2007 run 1
Repair of ‘guillotine valves’
Repair converter (just after T4 TAX – quite radioactive !)
Invert order of FISCs (AB internal)
Vacuum in KABES region
Reading of vacuum pumps
Magnetic field settings and readings
Complete software for K12-specific items:
P0-survey,
K12SURV
XCLD
Support for lead shield in between hodoscopes
o Remove HAC and Muon veto
o Installation of a MBPL in HAC region
o Prepare for installation of a CEDAR in SCR region
WORK organised / done by or with ATB/EA
DROPPED
LG, 15 March 2007 ATB work for 2007 run 2
Preliminary
Beam commissioning run:
23-25 May
No access to ECN3 !!
Start of proton beam in ECN3:
19 June
End of proton beam:
26 October
-200 GeV/c pion beam *):
31 October till
11 November
*) -180 GeV/c option under study
LG, 15 March 2007 ATB work for 2007 run 3
“Version 1.0-”
LG, 15 March 2007 ATB work for 2007 run 4
Repair of guillotine valves:
Need to make space by moving HAC
Partial dismounting of ventilation system
Work in Nitrogen atmosphere.
Planned for week 14 (April 2nd)
Possibly earlier, but no commitment
LG, 15 March 2007 ATB work for 2007 run 5
Repair converter
Must be IN beam for electron beams
Must be OUT for all other beams
For the moment stuck IN beam
Problem: just behind TAX – very radioactive (7 mSv/hr!)
Wait as long as possible for cooldown
Will be repaired of replaced
Invert order of FISCs
Ongoing now
LG, 15 March 2007 ATB work for 2007 run 6
Vacuum in KABES-2 region
KABES-2 will be removed (KABES-1 is out anyway).
Continuous vacuum through KABES
For RICH test (October) : remove vacuum downstream of scrapers
May have to remove part of neutron shielding wall
Depending on length of RICH prototype
LG, 15 March 2007 ATB work for 2007 run 7
Reading of vacuum pumps
Cabling problem (?) for some pumps
Should not be a show-stopper
One pressure reading is available at position 86, upstream of the
blue tube but in direct vacuum ‘contact’
If no KABES installed, two more pumps are directly connected
to the blue tube
I.Efthymiopoulos investigating what can be done.
Conflicting with LHC priorities in other groups
LG, 15 March 2007 ATB work for 2007 run 8
Magnetic field settings and readings
For a limited period during the 2006 run, not entirely by chance overlapping
with the K12 run, magnet settings and readings were not reliable.
The diagnosis was hampered by the presence of three simultaneous problems:
1) An increasing number of H/W faults on address cards
A systematic campaign of tests and repairs has been done
Some 14% were found faulty.
Consequently often several rectifiers replied to the same command…..
3) The addressing sequence was too fast, the reading was done before the
voltage had stabilised
Drivers added to stabilise voltage
2) Too many address cards on the same ‘databus’ interface card
Voltage drop lead to additional instabilities
Showed up when P42+K12 was activated
These problems have now been identified and repaired, should be ok,to be definitively validated for MNP33 before start-up (as early as possible).
LG, 15 March 2007 ATB work for 2007 run 9
Software items
P0-SURVEY
Essential for operation
Survey functionality exists, but configuration remains to be completed
Will be integrated in Software Interlock System – before DSO tests
K12SURV
For access to technical gallery
Will close TAX if TAX range changed during access
XCLD control
Anyway possible to control via FESA low-level software
GUI to be written – possibly at the last moment
LG, 15 March 2007 ATB work for 2007 run 10
Support for lead shield in between hodoscopes
Conceptual design proposed by S.Girod
Bolted onto yellow hodoscope frames (M8 screws)
Total weight : approx. 250 kg for Lead + 50 kg for support
LG, 15 March 2007 ATB work for 2007 run 11
Preferred
First proposals (last week):
LG, 15 March 2007 ATB work for 2007 run 12
Stability againstbuckling still to
be verified
LG, 15 March 2007 ATB work for 2007 run 13
Can be done by AB-ATB-EA
P326 funding required (material cost + FSU time)
Two possibilities for filling with lead:
1. Lead bricks
50 bricks have been delivered to ECN3, out of which 25 are new
Size 20 x 10 x 5 cm.
Disadvantages: cracks in between,
height marginal (3 hodoscope strips = 19.5 cm)
2. Lead sheets, e.g. 5 mm thick
Must be purchased
Could be 5 mm thick, 21 cm high, e.g. 50 cm wide. Total width 250 cm.
Offset layers by 10 mm, so that cracks are not aligned