APEX Schedule March 8 2006

1
APEX Schedule March 8 2006
store
injection
BPM fixed trigger TJS, RobM
Collimation in Phenix KAD
Beam based sextupole polarity YL TS Third
order resonance correction
Back 2 physics
Optics MBai
Stochastic cooling test MJB, MMB
800
100
500
1200
1000
400

• 200 pm dry run of Simons
• Cogging/uncogging
• STAR event display
• FCP, PFI, PWS, Christie

2
Summary of March 8 APEX

• Lost 3 hours on cooling water problems in AtR
• Experiments agreed to allow 1 extra h of APEX (we
  ended at 6 pm)
• BPM fixed trigger (Michnoff, Satogata)?slide
• Stochastic cooling test of aperture at kicker at
  injection (Brennan, Blaskiewicz). DONE.
• result horizontally well centered vertical
  6mm vs 3 mm ? drop 3 mm at the next maintenance
• Beam-based sextupole polarity (Luo,Satogata)?slide
  
• Optics (Bai) done at injection, rescheduled at
  store
• Study of radiation in Phenix detector, work on
  collimation for STAR and Phenix (Drees) - DONE

3
BPM trigger test
Michnoff, Satogata

• Bpms operational so far in auto-trigger to
  start (easier to get signals) plan is to switch
  to fixed-trigger
• Problem beam intensity now just about in between
  gain 1 and 10 (0.7-0.8 1011 existing threshold)
• Last APEX data taking towards fixed trigger
• BO6 BPMs were converted to fixed trigger ? ramp
  data comparison (picture fill 07580 07586) 

Fixed trigger
Auto-trigger
4
Beam based sextupole polarity check
Luo, Satogata

• Validation of method
• 1/3 blue ring done
• Will do the production
• in the next 1-2 weeks

5
Optics measurements
Bai

• Improvement in BPMs
• Improvement in algorithm,
• now completely model
• independent

• Glitch in the
• calculation of
• beta in IR6
• Deferred
• store

with improvement in BPMs and modified algorithm
that is 100 model independent
6
APEX Schedule March 14-15 2006
Store 6x6
injection
injection
2/3 resonance compensation Luo team
Calibration of Shottky Tunes Emittance Chromatici
ty Cameron DellaPenna
Preparation 10 Hz orbit Feedback Montag Michnoff S
chultheiss
Optics Gradient with AC Dipole Bai
Spin Tune Bai Bravar Itaru Gill
Optics Bai
Commissioning Lumi-emittance measurement Dejan,
Gassner Bellavia, Tseng
3am
8am
1am
10pm
4am
6am
5am
AGS LOTO
Parasitic during the day Jet is dimming.