AD and AD experimental areas: equipment tests and startup with beam Tommy Eriksson AB/OP/AD

19 January 2006 PS&SPS DAYS

AD equipment tests and startup with beam

Slide 1

AD and AD experimental areas: equipment tests and startup with beam

Tommy Eriksson AB/OP/AD



Slide 2

AD and AD experimental areas: equipment tests and startup with beam

1. Planning2. Equipment tests3. HW status4. News for the 2006 run5. Beam requirements6. ccc7. Conclusion



Slide 3

2006 Run planning

• Short run with only 3 months of physics.• AD run extended to cover weekends.• 2650 hours total (2040 physics) are scheduled, to be compared

with 3400 in 2004.• OP/AD-LEIR section will cover either AD or LEIR operation,

including LEIR commissioning.• AD: ops crew = 5 specialists on-call Mon 07:00 – Mon 07:00

24h/24. Shiftwork on AD during startups and md:s.



Slide 4

Shutdown work/startup planning



Slide 5

Equipment tests

• Key dates:– 24/4: search + closure of AD ring and Target Area

• AD Hall remains in free access unless major problems• Target area in controlled access (special access procedure)• Controlled access to AD ring if needed

– 24/4 – 14/5: HW tests + cold checkout– 15/5: startup w. production beam– No critical days



Slide 6

HW status: e-cooler



Slide 7

HW status: e-cooler



Slide 8

Electron cooler/Vacuum:

• Replacement of / add missing NEG:s• Repair of orbit pickups• Replacement of cathode• Alignment • Improvement of orbit correctors 2904/2917: Study

completed, but no budget to go further



Slide 9

Electron cooler/Vacuum

• Install non-magnetic support for VVS3105• Install vacuum chamber in place of K35• Repair of BIPM sect 42• Isolate 8000-line• Modify VVS in ej. line



Slide 10

News for 2006

• ACE (AD-4) has requested 500 MeV/c pbars for cell irradiation.• Approval by SPSC in Jan. 06 ??• This implies significant changes to the AD cycle:

– Tests of SW during eq.tests– Use of some of the planned md-periods during the year for further tests– Final setting-up followed by physics to be done at end of 2006 run to avoid

disturbing the other users; 160 hours in total requested (setup + physics).• If unexpected problems, ACE can go back to 300 MeV/c

operation on short notice



Slide 11

News for 2006



Slide 12

News for 2006

• Tests of ATRAP:s new 3T solenoid in 2004 revealed that no beam can be transferred to ATHENA due to the stray field

• A new H dipole will be installed to compensate (DE0.DHZ87)

• Tests during startup



Slide 13

Beam requirements

• 26 GeV/c beam needed as from 15/5• No use of 3.57 GeV/c protons is planned, BUT:

– In case of serious problems, we might have to resort to proton operation with AD in reverse polarity; 3.5 GeV/c tst beam should be available on fairly short notice



Slide 14

Operation from ccc

• Start-ups and md:s will continue to be carried out from the ACR

• As far as tools/diagnostics, no major problems can expected for ccc operation; CCC=MCR as seen from the AD

• The required AD modifications for efficient operation from the ccc were:

– Improve stability with improved steering dipoles for pbar/e-beam alignment

– Replace MWPC:s by non-destructive BPM:s in the ejection lines

• None of the requested modifications were carried out – many trips to/from ACR, more downtime and delays can be expected



Slide 15

Conclusion

• Main worries for the 2006 startup:– 18 months stop– Electron cooler behaviour after complete dismantling – No adaptation for ccc-operation

AD and AD experimental areas: equipment tests and startup with beam Tommy Eriksson AB/OP/AD

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