APEX dAu en game PP Run

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APEXd-Au en gamePP Run

• Fulvia Pilat
• Machine-Experiments Meeting
• January 15, 2008

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APEX stats Run-8 (so far)
Stats Run-7 APEX availability 72 Time at store
for physics 49 Stats Run-8 (so far) APEX
availability 77.5 Physics, last FIVE weeks is
101.55hr 60.4 Physics, last SIX weeks is 98.3
hr 58.5Physics, last SEVEN weeks (all of Run8)
94.8 hr 56.4 So far we meet our goals for
Run-7 (mid 50) for the entire run, and for the
last 5 weeks we meet our ERTAF goals (better
reliability of the PS system)
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Uptime PS system
Compare first 9 weeks of operations Run-7 vs.
Run-8
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APEX d-Au Run-8 - status

• Completed
• 08-36 0A IBS with decoupling ? transverse
  stochastic cooling
• 08-17 0A Test of ramp and operations with
  betalt0.8m (with d-Au) 26h total
• Beta measurements 2 techniques test of IP
  knobs
• ? 30 luminosity
• 06-31 0A ORM Measurements ? beta beat correction
• 08-01 1A Electron cloud location ? performance
  limits
• 08-18 1A Stability threshold at transition ?
  performance limits
• 08-07 1B Energy Loss of Debunched Beam
• Running
• 07-33 A0 Tune and chromatic drift correction at
  injection ? operations
• 08-14 A0 Collimation on the ramp ? performance
  limits
• 08-02 1B Au31 in AGS

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APEX Run-8 d-Au To Do

• 08-03 A0 Transition crossing longitudinal
  matching as a function of RF
• 08-06 A0 Measuring and modeling linear and
  nonlinear chromaticities
• 07-19 A0 Common Mode Noise Measurement
• 08-12 A0 Development of IBS-suppression lattice
  (100 or 110 deg)
• 08-25 A0 Transition instability as function of
  chromaticity jump
• 08-27 A0 Measure and localize gradient errors
• 08-34 A0 Beta-Dispersion Beating Correction
• 08-29 A0 Beam profile measurement with CNI
  polarimeter
• 08-16 A0 Using phasing of two RF cavities at
  transition
• 08-28 B0 Hybrid Tune Tracker
• 08-31 A1 Transition Instability Modes
• 08-24 B2 Study of possible Cooling of Au_77 in
  AGS (in parallel)
• 08-37 A0 Anomalous BTF at injection
• 08-38 A0 Yellow radial feedback measurements

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APEX D-Au summary

• We devoted considerable time (30) on issues that
  are in the gray area between APEX and
  developments (beta squeeze, knobs, etc). This is
  a flexible model that works well, however
• To complete even the A0 studies approved we would
  need 4 sessions of APEX until the end of d-Au, 5
  sessions with contingency (assuming present APEX
  uptime)
• We really need the 3 planned sessions (January
  16,23,27) at the end of d-Au

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APEX Schedule January 15-16 2008
Injection

Ramps

Store 6-12 bunches
Store BBQ
Injection BBQ
Ramps
08-29 Profile with polarimeter Huang, Sivertz,
team
08-25 Chrom Jump _at_inj Montag
08-03 Longitudinal matching _at_transition Abreu Bai
Blaskiewicz
06-31 8-27 ORM Corrections. Optics Satogata Bai
08-17 IP Knobs Ptitsyn Malitsky
08-14 Collimation on the ramp Drees
08-28 Hybrid Tune Tracker Cameron team
08-24 Au77 Trbojevic team
6am
2am
8am
12am
8pm
10pm
4am
700 am Injectors OFF
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APEX in the PP run

• The plans for PP advocates a (relatively)
  conservative beta of 90 cm for operation with
  development for lower beta (lt70cm) in APEX
• At the same time we need to make sure that high
  priority studies with polarized beams and
  beam-beam studies get done as well
• At the moment we have 3 APEX sessions planned
  with one possible more at the end of the PP run.
  If we do beta in APEX we will need the extra
  time to do the rest of the program.

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Approved studies with PP

• Polarized Protons
• 07-03 0A Measure driven coherent spin precession
• 08-09 0A Polarization profile using the RHIC
  Carbon Polarimeter
• 08-10 0A Rate dependence of the RHIC Carbon
  Polarimeter
• 08-23 0A RHIC Polarization variation with time
• 08-19 0B Spin tune and decoherence measurements
• 08-05 1A Spin Echo and Resonance Interference
• Protons
• 08-17 0A Test of ramp and operations with
  betalt0.7m
• 08-08 1A Long-range beam-beam interactions
• 08-11 1A Lifetimes of non-colliding proton
  bunches
• 08-35 1A 3Qy resonance measurement and correction
• 08-33 0B Chromaticity Feedback
• studies from d-Au that could be done with
  protons too