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