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RHIC Heavy Ion Run-11. Status Meeting Updates. Heavy Ion Run Final Update 6/24-27. Physics running, 41 stores Tandem intensity issues Access controls failure Access for RF trip. Outstanding items. Next 48 hours 6/27-29. Physics ends 2200 Tuesday 6/28

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rhic heavy ion run 11

RHIC Heavy Ion Run-11

Status Meeting Updates

heavy ion run final update 6 24 27
Heavy Ion Run Final Update 6/24-27
  • Physics running, 41stores
    • Tandem intensity issues
    • Access controls failure
    • Access for RF trip

Outstanding items

next 48 hours 6 27 29
Next 48 hours 6/27-29
  • Physics ends 2200 Tuesday 6/28
  • APEX and Power Supply tests until 0600 Wednesday 6/29
heavy ion run update 6 22 6 24
Heavy Ion Run Update 6/22-6/24
  • Physics running, 28 stores
    • No failed ramps
    • 4 aborted stores
      • ODH HW failure
      • Node card failure
      • Abort kicker trip
      • Power dip
  • Blue injection retuned
  • Reduced store length to 1 hour
  • Conducted vernier scans

Outstanding items

  • Yellow end-ramp efficiency
    • Better overnight
    • Injection damper issues?
weekend outlook 6 24 27
Weekend outlook 6/24-27
  • Network recovery
  • Continue Physics
  • APEX and MD next week?
  • Last meeting: Monday, noon
heavy ion run update 6 20 6 22
Heavy Ion Run Update 6/20-6/22
  • Setup started ~1730 Monday
  • Physics started ~1730 Tuesday
    • 6 stores
  • Injection & ramp collimation implemented
  • Correcting injection drift
  • Tandem reverted to optimal Au configuration

Outstanding items

  • Blue injection efficiency
  • Yellow ramp efficiency
  • Injection damper issues?
next 48 hours 6 22 24
Next 48 hours 6/22-24
  • Continue Physics
    • Store length? Optimal ~1 hour.
    • Can detectors remain on?
  • Status meetings M-W-F
heavy ion run update 6 17 6 20
Heavy Ion Run Update 6/17-6/20
  • Physics running, 12 stores
    • 2 failed ramps
      • Blue abort prefire
    • 1 aborted store
      • power dip, QLI
  • Tandem foil work conducted behind store Friday.
  • One additional store for AnDY (16081)
  • 200 GeV Physics ended 0800 Monday.

Outstanding items

  • Blue injection efficiency
  • Storage cavity voltage calibration
    • Blue cavities
    • Requires working Blue longitudinal Schottky
27 gev startup 6 20 22
27 GeV startup 6/20-22
  • Starts Monday 1600
    • IR access during hysteresis
    • Beam development follows
      • Re-establish injected beam
      • Ramp with feedback
      • Store setup
  • Status meetings M-W-F
heavy ion run update 6 15 6 17
Heavy Ion Run Update 6/15-6/17
  • Physics running, 6 stores
    • 1 failed ramp
      • LLRF test ramp
    • 1 aborted store
      • False BLM trip, 7W
  • IP2 crossing angle removed after maintenance
    • Corrected with feedbacks
  • Machine Development: 9 hours
    • 7 hours LLRF
      • Punctuated with 2 HLRF failures/accesses and Blue injection kicker failure
      • Second ramp needed
    • 2 hours AnDY collision setup

Outstanding items

  • Tandem low on stripping foils
  • Blue injection efficiency
  • Blue transition
    • Landau problem again, fill 16071
  • Storage cavity voltage calibration
    • Blue cavities
    • Requires working Blue longitudinal Schottky
zdc accidental correction
ZDC Accidental correction
  • Number of buckets: Blue filled bunches
  • STAR
    • ZDC Singles East, ch 1
    • ZDC Singles West, ch 2
    • ZDC, ch 3

Corrected=ZDC-{East*West/[(Blue-Blue/14)*78000]}

  • PHENIX
    • ZDC Singles North, ch 1.1
    • ZDC Singles South, ch 1.2
    • ZDC, ch 16

Corrected=ZDC-[North*South/(Blue*78000)]

final 200 gev weekend 6 17 20
Final 200 GeV weekend 6/17-20
  • Continue Physics
    • One more store with AnDY
    • One more set of vernier scans
    • One more test of β* squeeze
  • Tandem foil work behind store
  • APEX Monday 0800-1600
  • √SNN = 27 GeV beam development starts Monday 1600
  • Status meetings M-W-F
heavy ion run update 6 13 6 15
Heavy Ion Run Update 6/13-6/15
  • Physics running, 10 stores
    • 3 failed ramps
      • Yellow feedback target tunes too close?
      • Yellow debunching before accramp
      • Blue abort kicker prefire + quench
    • 4 aborted stores
      • Yo1-sxf1 trip
      • Yellow abort kicker prefire + quench
      • Wrong Chrom values left from MD
      • Cryo lead flow interlock
  • Beta squeeze, DX ramp test for AnDY work
    • Partially behind Booster RF failure
  • Some Tandem intensity issues

Outstanding items

  • Blue injection efficiency
  • Storage cavity voltage calibration
    • Blue cavities
    • Requires working Blue longitudinal Schottky
next 48 hours 6 13 15
Next 48 hours 6/13-15
  • LLRF firmware upgrade
    • Dump at 0900 tomorrow to begin
  • AnDY ZDC calibration
    • 2 stores following LLRF work
  • Continue Physics
  • √SNN = 27 GeV beam development next Monday
  • Status meetings M-W-F
heavy ion run update 6 10 6 13
Heavy Ion Run Update 6/10-6/13
  • Physics running, 14 stores
    • 2 failed ramps
      • Network switch failure, 11A
      • BBQ lock windows not set for ramp
    • 1 early dump
      • Rebucketing failure, HLRF misconfiguration after access

Outstanding items

  • Blue longitudinal problems on ramp
  • Blue injection efficiency
  • Storage cavity voltage calibration
    • Blue cavities
  • LLRF firmware upgrade
    • 4 hrs, week of 6/13
  • AnDY ZDC calibration
27 gev medium energy run notes
27 GeV medium energy run notes
  • Ramp name Au11v6 (work in progress)
    • 13.5 GeV beam energy
    • 3m β* at IP6 and IP8
    • Below transition
  • No rebucketing
  • No longitudinal cooling
  • AP shifts start 0800 Monday 6/20
next 48 hours 6 13 151
Next 48 hours 6/13-15
  • End of store MD: β* squeeze at IP6
    • Slow ramp to try and eliminate rise in beam decay
  • Continue Physics
    • Continue fine tuning cooling for best performance.
  • √SNN = 27 GeV beam development next Monday
  • Status meetings M-W-F
heavy ion run update 6 8 6 10
Heavy Ion Run Update 6/8-6/10
  • Physics running, 4 stores
    • no failed ramps
    • 2 early dumps
      • Sextupole temperature problems in 1003B
  • APEX, 16 hours
    • Lost 4 hours to weather and related issues.

Outstanding items

  • Blue longitudinal problems on ramp
    • Although, none on the last few ramps
  • Blue injection efficiency
  • Storage cavity voltage calibration
    • Blue cavities
  • LLRF firmware upgrade
    • 4 hrs, week of 6/13
  • AnDYZDC calibration
weekend outlook 6 10 13
Weekend outlook 6/10-13
  • Access for PHENIX RPC issues.
  • Continue Physics
    • Continue fine tuning cooling for best performance.
  • NOTE plan to run at √SNN = 27 GeV
  • Status meetings M-W-F
heavy ion run update 6 6 6 8
Heavy Ion Run Update 6/6-6/8
  • Physics running, 9 stores
    • 1 failed ramp
      • Early ramp loss, LLRF problem
    • 2 aborted stores
      • Yellow abort kicker
      • Yellow RF permit failure
  • Machine development
    • Beta* squeeze test, “MAD-X knob”
    • Some complications to measured results, will try again

Outstanding items

  • Blue longitudinal problems on ramp
  • Blue injection efficiency
  • Storage cavity voltage calibration
    • Blue cavities
  • LLRF firmware upgrade
    • 4 hrs, week of 6/13
next 48 hours 6 6 8
Next 48 hours 6/6-8
  • Continue Physics
    • Continue fine tuning cooling for best performance.
  • Test β* squeeze at end of store.
  • APEX Thursday
    • Note NSRL/Tandem Si beam conflict
  • Status meetings M-W-F
heavy ion run update 6 3 6 6
Heavy Ion Run Update 6/3-6/6
  • Physics running, 14 stores
    • 3 failed ramps
      • Sextupole trip late in ramp
      • Early Blue loss, RF or node card?
    • 1 aborted store, QD problem
    • Landau cavity issues at transition
  • Machine development
    • Beta* squeeze test, “MAD-X knob”

Outstanding items

  • Blue injection efficiency
  • Storage cavity voltage calibration
    • Blue cavities
  • LLRF firmware upgrade
    • 4 hrs, week of 6/13
  • Stochastic cooling issues
    • BL kicker drive
next 48 hours 6 6 81
Next 48 hours 6/6-8
  • Continue Physics
    • Continue fine tuning cooling for best performance.
  • APEX Wednesday
    • Note NSRL/Tandem Si beam conflict
  • Status meetings M-W-F
heavy ion run update 5 27 6 1
Heavy Ion Run Update 5/27-6/1
  • Maintenance, vacuum pump down complete Thursday 0330.
    • STAR, PHENIX polarity reversal
  • Physics running, 5 stores
    • 1 early dump
      • Low rates, Blue vacuum
    • 3 aborted stores
      • Yellow quench after rebucketing, YS5 cavity problem
      • Yellow abort late in store, related to activate?
      • Cryo lead flow
  • Machine development
    • Beta* squeeze test, all planes both IRs
    • Working point scan
    • Yellow RF cavity voltage calibration

Outstanding items

  • Blue injection efficiency
  • Storage cavity voltage calibration
    • Blue cavities
  • LLRF firmware upgrade
    • 4 hrs, week of 6/13
  • Stochastic cooling issues
    • BL kicker drive repair
    • BV not yet operational
slide41

Run-10 Yellow working point

Present Yellow working point

weekend outlook 6 3 6
Weekend outlook 6/3-6
  • Restore stochastic cooling systems
    • Requires additional access
    • PHENIX access concurrently
  • Continue Physics
    • Vernier scans Friday: early in store
  • Status meetings M-W-F
heavy ion run update 5 27 6 11
Heavy Ion Run Update 5/27-6/1
  • Physics running, 19 stores
    • 5 failed ramps
      • Early loss attributed to y-qtrim?
      • Yellow RF trip on ramp
      • Fast Blue loss ~10 sec after γt (2x)
      • Unexplained fast Blue loss late in ramp
    • 5 aborted stores
      • PASS failure
      • Blue abort kicker
      • STAR magnet ramping/chiller problems
      • Early dump, YS3 trip/bad rebucketing
      • QLI at dump, Yellow debunched beam
    • 1 extended store
      • Insufficient Tandem beam
  • Some YL cooling issues, off for last 3 stores

Outstanding items

  • Yellow, Blue store conditions
  • Blue injection efficiency
  • Storage cavity voltage calibration
    • 1 test ramp
  • BV cooling pickup
    • Maintenance day item
  • LLRF firmware upgrade
    • 4 hrs, week of 6/13
  • AGS ag17-qgt magnet failure
    • Deferred to shutdown
next 48 hours 6 1 3
Next 48 hours 6/1-3
  • Complete maintenance
    • BV cooling pickup
    • YL cooling kicker motion control
    • YS2, YS3 RF
    • Yellow collimator pindiodes
  • Resume Physics
    • STAR, PHENIX polarity switches
    • Vernier scans Thursday or Friday: early in store
  • Machine Development Thursday:
    • End of store: test beta* squeeze, 2 IRs 4 planes
    • Starts between daytime stores
    • Store conditions
      • Working point scans (dedicated ramp)
      • Storage voltage calibration
  • Status meetings M-W-F
heavy ion run update 5 23 25
Heavy Ion Run Update 5/23-25
  • APEX completed Wednesday
    • Attempt at fixing post-γt ramp loss
  • Physics running, 4 stores
    • 3 failed ramps
      • Early loss attributed to y-qtrim?
      • FEC reboot and subsequent steering error
      • Fast loss ~10 sec after γt
    • 1 aborted store
      • Unexplained permit drop 6a to 7a
    • AGS vacuum failure+Blue injection kicker
      • Other work completed concurrently
    • Machine Development deferred
    • Some YV cooling issues(limit switch fixed)

Outstanding items

  • AGS ag17-qgt magnet failure
    • Long maintenance day or shutdown repair
  • Yellow, Blue store conditions
  • Blue injection efficiency
  • Storage cavity voltage calibration
    • 1 test ramp
  • BV cooling pickup
    • Maintenance day item
  • LLRF firmware upgrade
    • 4 hrs, week of 6/13
holiday weekend 5 27 31
Holiday weekend 5/27-31
  • Continue Physics
  • Machine Development items:
    • Store conditions
      • Working point scans (dedicated ramp)
      • Yellow negative chromaticity? Blue?
      • Beta* squeeze – prepare for automation.
    • More beam
    • Ramp Efficiency
      • Ramp quicker after fill
  • Status meetings M-W-F
  • Run Coordinator will be off-island but on cell...
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 5 23 251
Heavy Ion Run Update 5/23-25
  • Physics running, 7 stores
    • No aborted stores (2 early dumps, 1 late dump).
    • 5 failed ramps
      • Sextupole ramp rate (2x)
      • Post-transition loss (3x)
    • Accesses for repairs: YA1 cavity, stochastic cooling amplifiers, sextupole feedthrough ground current, collimator pin diodes…
    • QD controls problems (2x)
  • 3rd test of beta squeeze at store
    • 4 planes successfully squeezed at once
    • Requires more beam time to measure optics, interpret resulting rate changes.
  • Vernier scans conducted
  • Outstanding items
    • Blue, Yellow store conditions
      • MD Thursday
    • Storage cavity voltage calibration
      • Requires test ramp
    • Blue injection efficiency
      • Fine tuning
      • Offline evaluation
    • AGS: ag17-qgt, tune quad
    • ATR synchro errors
    • BV cooling pickup
      • Open vacuum to repair
    • LLRF firmware upgrade
      • 4 hrs week of 6/13
next 48 hours 5 25 27
Next 48 hours 5/25-27
  • APEX completes 2359 tonight
  • Continue Physics
  • Machine Development Thursday
    • Store conditions
      • Working point scans (dedicated ramp)
      • Yellow negative chromaticity? Blue?
      • Beta* squeeze – prepare for automation.
    • More beam
    • Ramp Efficiency
      • Ramp quicker after fill
  • Status meetings M-W-F
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 5 20 23
Heavy Ion Run Update 5/20-23
  • Physics running, 14 stores
    • Only 2 failed ramps (Yellow abort prefire)
    • No aborted stores.
  • All stochastic cooling systems on
    • Still some kicker insertion issues
  • Additional test of beta squeeze at store (successful)
    • Requires more beam time to measure optics, interpret resulting rate changes.
  • Outstanding items
    • YA1 cavity problem
    • Source/injector intensity
    • Blue, Yellow store conditions
      • Ready for more beam?
    • Storage cavity voltage calibration
      • Requires test ramp
    • Blue injection efficiency
      • Fine tuning
      • Offline evaluation
next 48 hours 5 23 25
Next 48 hours 5/23-25
  • Continue Physics
    • AGS access behind store for RF?
    • Store length with cooling?
    • Continue stochastic cooling development
  • Machine Development items for improved luminosity
    • More beam
    • Store conditions
      • Working point scans (dedicated ramp)
      • Yellow negative chromaticity? Blue?
      • Beta* squeeze – prepare for automation.
    • Ramp Efficiency
      • Ramp quicker after fill
  • Status meetings M-W-F
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 5 18 20
Heavy Ion Run Update 5/18-20
  • Maintenance completed
    • YS5, BS5 in operation
    • Booster B3 RF modified
  • Physics running, 8 stores
    • Storage cavity trip at rebucketing
    • Loss at rebucketing
    • AGS extraction issue, early dump
    • Power dip
    • Loss at transition
  • All stochastic cooling systems on but…
    • YL slip detection issue
    • BV broken switch
  • Beta squeeze at store tested
  • Outstanding items
    • Source/injector intensity
    • Tenuous Yellow store conditions
    • Storage cavity voltage calibration
    • Blue injection efficiency
      • Fine tuning
      • Offline evaluation
slide58

YL, BL

YL, BL, YV, BV

YL, VL, YV, BV

YL, BL, YV

weekend outlook 5 20 23
Weekend outlook 5/20-23
  • Continue Physics
    • Store length with cooling?
  • Stochastic cooling
    • Goal: all 4 operational this weekend
  • Machine Development items for improved luminosity
    • Store conditions
      • Yellow negative chromaticity? Blue?
      • Check y5-lm3.2 loss, collimation setup
    • Ramp Efficiency
      • Ramp quicker after fill
    • More beam
  • Status meetings M-W-F
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 5 16 18
Heavy Ion Run Update 5/16-18
  • Physics running, 7 stores
    • Yellow losses after rebucketing (5x)
    • bo3-sxd1 trip, loss after rebucketing
    • ATR cogging problem during/after MD
    • Other LLRF issue?
      • “Cured” by hysteresis
  • Machine Development
    • Corrected Blue injection
  • Yellow vertical cooling operational, but losses at kicker exceed limits
  • Outstanding items
    • Blue injection efficiency
      • Fine tuning
      • Offline evaluation
    • Booster B3 RF, deferred troubleshooting
    • YS5, BS5 cavity conditioning
      • Maintenance item
    • Storage cavity voltage calibration
next 48 hours 5 18 20
Next 48 hours 5/18-20
  • Finish Maintenance
  • Continue Physics
    • Store length with partial cooling?
  • Stochastic cooling setup, Blue vertical
    • Every possible store
  • Machine Development items for improved luminosity
    • Store conditions
      • Yellow negative chromaticity? Blue?
      • Have we drifted from optimal working point?
    • Ramp Efficiency
      • Ramp quicker after fill
    • More beam
  • Status meetings M-W-F
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update weekend 5 13 16
Heavy Ion Run Update weekend 5/13-16
  • Physics running, 12 stores
    • Landau cavity configuration issue
    • Controls server failure + restoration issue
    • Transition abort
    • Yellow store collimation
  • Blue & Yellow longitudinal cooling operational
  • Outstanding items
    • Blue injection efficiency
    • Booster B3 RF, deferred troubleshooting
    • YS5, BS5 cavity conditioning
this week s outlook 5 16
This week’s outlook 5/16-?
  • Continue Physics
    • Store length w/o cooling should be 4 hours.
  • Stochastic cooling setup, vertical
    • Every possible store
  • Machine Development items for improved luminosity
    • Ramp Efficiency
      • Blue injection efficiency
      • Ramp quicker after fill
      • Yellow beam decay spikes at rebucketing.
      • Longitudinal growth after transition – gap volts? Low intensity bunch?
    • More beam
  • Next meetings M-W-F
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 5 12 13
Heavy Ion Run Update 5/12-13
  • Physics running, 5 stores
    • Peak luminosities approaching best stores from last run
  • Yellow longitudinal cooling operational
  • Blue longitudinal tested, not yet operational
  • Outstanding items
    • BS2 cavity trip
    • Blue injection efficiency
      • Better, but still variable
    • Booster B3 RF, deferred troubleshooting
    • YS5, BS5 cavity conditioning
      • More conditioning for YS4, BS4?
weekend 5 13 16
Weekend 5/13-16
  • Continue Physics
    • Store length w/o cooling should be 4 hours.
  • Stochastic cooling setup
    • Every possible store
  • Machine Development items for improved luminosity
    • Ramp Efficiency
      • Ramp quicker after fill
      • Blue injection efficiency
      • Transition efficiency – chromaticity? Yellow dipole feedback?
      • Yellow beam decay spikes at rebucketing.
    • More beam
  • Next meeting Monday noon in LCR.
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 5 10 12
Heavy Ion Run Update 5/10-12
  • Physics running, 4 stores
  • Stochastic cooling setup continues
  • APEX
  • Maintenance
    • YA2 opened, repaired
    • YS4, BS4 cavities in operation
    • LLRF failure post-maintenance
  • Outstanding items
    • Blue injection efficiency
      • Better, but still variable
    • Booster B3 RF, deferred troubleshooting
    • Vernier scans
    • YS5, BS5 cavity conditioning
      • More conditioning for YS4, BS4?
next 24 hours 5 11 12
Next 24 hours 5/11-12
  • Continue Physics
    • Store length w/o cooling should be 4 hours.
  • Stochastic cooling setup
    • Every possible store
  • Machine Development items for improved luminosity
    • Ramp Efficiency
      • Ramp quicker after fill
      • Transition efficiency – chromaticity? Yellow dipole feedback?
  • More vernier scans?
  • Meeting tomorrow noon in LCR.
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 5 9 10
Heavy Ion Run Update 5/9-10
  • Access for RF troubleshooting, experiments
  • Physics running, more long stores
    • PS problems
      • Main magnet
    • Abort kicker prefire
    • Stochastic cooling trip
  • Stochastic cooling setup continues
  • Outstanding items
    • YA2 cavity
    • AGS extraction efficiency
    • Blue injection efficiency
    • Booster B3 RF, deferred troubleshooting
    • Vernier scans
    • YS4, YS5, BS4, BS5 cavity conditioning
next 24 hours 5 10 11
Next 24 hours 5/10-11
  • Continue Physics
    • Reduce store length w/o cooling?
  • Stochastic cooling setup
    • Every possible store
  • Machine Development items for improved luminosity
    • AGS extraction efficiency work (parasitic)
      • Still ~7% low?
    • Ramp Efficiency
      • Ramp quicker after fill
      • Transition efficiency – chromaticity?
  • Schedule vernier scans
  • APEX 0001-0800
  • Maintenance 0800-1600
  • NO MEETING TOMORROW
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update weekend 5 6 9
Heavy Ion Run Updateweekend 5/6-9
  • Physics running but with few normal dumps
    • PS problems
      • Sextupole trip
      • Main magnet
      • UPS
    • Periodic orbit correction/lead flow
    • Abort kicker prefire
    • Stochastic cooling trip
    • YA2 RF problems
  • Stochastic cooling setup continues
  • Outstanding items
    • YA2 cavity
    • AGS extraction efficiency
    • Booster B3 RF, deferred troubleshooting
    • Vernier scans
    • YS4, YS5, BS4, BS5 cavity conditioning
    • WCM calibration?
next 24 hours 5 9 10
Next 24 hours 5/9-10
  • Troubleshoot YA2
  • Continue Physics
    • Reduce store length w/o cooling?
  • Stochastic cooling setup
    • Every possible store
  • Machine Development items for improved luminosity
    • AGS extraction efficiency work (parasitic)
    • Ramp Efficiency
      • Ramp quicker after fill
      • Transition efficiency – chromaticity?
  • Schedule vernier scans
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 5 5 6
Heavy Ion Run Update 5/5-6
  • Rebucketing operational
  • 2 stores overnight
  • Outstanding items
    • Ramp efficiency
      • 5-6% snapback loss
      • 3-8% transition loss
    • Storage cavity conditioning
      • New cavities not yet up to voltage
    • Booster B3 RF cavity
      • May limit our highest injector intensities
    • BS3 cavity
      • investigating
weekend 5 6 9
Weekend 5/6-9
  • Ramp tuning
    • Transition losses – chromaticity?
    • Orbit after transition
    • Injection debunching – check cavity phasing?
    • Continue ramp collimation setup
  • Physics
    • Store length 4 hours?
  • Store setup
    • Stochastic cooling setup, longitudinal first
    • Check & adjust store chromaticity
    • Increase bunch intensity/number up to 1.3/111
  • Other items
    • Check injection drift correction
    • Optics measurements, Blue
    • Ramp chromaticity with Booster off?
  • WEEKEND MEETINGS -- cancelled
heavy ion run update 5 4 5
Heavy Ion Run Update 5/4-5
  • Beam resumed ~2000 after maintenance
    • Bunch intensities approaching 1.3e9
  • YA1 cavity operational
  • Landau cavities on
  • Rebucketing setup started
    • Storage cavity phasing
  • Yellow store chromaticity measured
    • Suggests negative horizontal
  • Yellow tune scan at store
    • Best Yellow: (.2319, .2071)
    • Blue: (.2310, .2147)
  • b2-dhx, sector 5 qgt problems
  • Outstanding items
    • Ramp efficiency
      • 5-6% snapback loss
      • 3-8% transition loss
    • Storage cavity conditioning
      • New cavities not yet up to voltage
    • WCM rebucket error
    • Booster B3 RF cavity
      • May limit our highest injector intensities
next 24 hours 5 5 6
Next 24 hours 5/5-6
  • Store setup
    • Rebucket setup has highest priority
    • Stochastic cooling setup, longitudinal first
    • Check & adjust chromaticity
    • Increase bunch intensity/number up to 1.3/111
  • Overnight stores for experiments
    • Pending rebucket work
  • Other items
    • Continue ramp collimation setup
    • Check injection drift correction
    • Optics measurements
    • Ramp chromaticity with Booster off?
heavy ion run update 5 3 4
Heavy Ion Run Update 5/3-4
  • Collisions established
    • 79x79, 1e11
  • Initial collimation complete
  • 10 Hz feedback running
  • Gap cleaning operational
  • Outstanding items
    • YA1 cavity
      • Repair made, opened vacuum during maintenance today
    • Misc elog issues
      • Ramp efficiency entry
      • RatView scales
    • Booster B3 RF cavity
next 24 hours 5 4 5
Next 24 hours 5/4-5
  • Finish maintenance, restore beam
    • Evaluate YA1 repair
  • Store setup
    • Rebucket setup
    • Stochastic cooling setup, longitudinal first
    • Increase bunch intensity/number up to 1.3/111
  • Other items
    • Landau cavities
    • Check injection drift correction
    • Continue ramp collimation setup
    • Store chromaticity, Yellow
    • Optics measurements
    • Ramp chromaticity with Booster off?
heavy ion run update 5 2 3
Heavy Ion Run Update 5/2-3
  • Beam to store on first ramp
  • Ramp development finishes major work in ~3 hours
  • Completed items:
    • Gamma jump, yellow dipole feedback
    • BPM timing @ injection, store
    • Tune/coupling/orbit feedback employed
    • Tune/coupling replay exercised
    • Ramp chromaticity measurement
  • Outstanding items
    • YA1 cavity
      • Presently focusing on external issues
    • Note change in global beam sync timing
      • 26 ns Blue
      • 24 ns Yellow
    • WCM transition
    • Misc elog issues
      • Ramp efficiency entry
      • Injection statistics?
      • RatView scales
next 24 hours 5 3 4
Next 24 hours 5/3-4
  • Ramp development, store setup until 0700 Wednesday
    • Investigate YA1 issue (access if necessary)
    • Increase bunch intensity/number up to 56
    • Ramp collimation
    • RhicInjection orbit feedback test
    • RF cogging on ramp
    • Separation bump removal on ramp
    • Steer for collisions
    • Rebucket? Stochastic cooling?
    • Ramp chromaticity with Booster off?
heavy ion run update 4 29 5 2
Heavy Ion Run Update 4/29-5/2
  • Low energy run completed at 0800 this morning
  • Weekend troubles:
    • Lead flow interlock
    • AGS L10 RF cavity
  • Outstanding items
    • Injection efficiency
      • Lower than normal injection
      • Limits injected intensity
    • Booster B3 RF, deferred troubleshooting
next 24 hours 5 2 3
Next 24 hours 5/2-3
  • Injection beam development 1100-1300
  • PS ramp testing, Booster B3 RF troubleshooting ~1300-1500 Monday.
  • Setup with beam resumes 1500 today.
  • AP shifts resume
    • Re-establish injection
    • Instrumentation check
    • Ramp Development
heavy ion run update 4 28 29 11
Heavy Ion Run Update 4/28-29/11
  • PHENIX zero field run completed, settings reverted.
  • Second set of vernier scans conducted.
  • Power dip 1550-0030
    • Booster, AGS ring accesses required
  • Outstanding items
    • Injection efficiency
      • Lower than normal injection
      • Limits injected intensity
    • Booster B3 RF, deferred troubleshooting
    • Vernier scans
weekend 4 29 5 2
Weekend 4/29-5/2
  • Continue Physics
    • Store length = 30 min
  • Last vernier scans
  • APEX 0800-1400 Monday
  • √sNN=200 GeV setup begins 1400 Monday
    • Ramp Au11v3::injection→Au11v1::injection with beam, feedback
  • PS ramp testing, Booster B3 RF troubleshooting ~1600 Monday.
  • AP shifts resume Monday evening
heavy ion run update 4 27 28 11
Heavy Ion Run Update 4/27-28/11
  • PHENIX zero field run under way.
  • Outstanding items
    • Injection efficiency
      • Lower than normal injection
      • Limits injected intensity
    • Booster B3 RF, deferred troubleshooting
    • Vernier scans
next 24 hours 4 28 29
Next 24 hours 4/28-29
  • Resume normal stores
  • Continue Physics
    • Store length = 30 min
  • More vernier scans
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update 4 26 27 11
Heavy Ion Run Update 4/26-27/11
  • Initial vernier scans completed
    • Optimized PHENIX, repositioned STAR
  • Booster beamstop failure 2130-0600
    • Replaced bo6-qs3, yi6-sx3
    • Repaired bi8-qf3
    • Sublimated sector 4 vacuum
  • Outstanding items
    • Injection efficiency
      • Limits injected intensity
    • Orbit control
      • High RMS since hysteresis
    • Booster B3 RF, deferred troubleshooting
    • Vernier scans
next 24 hours 4 27 28
Next 24 hours 4/27-28
  • Examine closed orbit, injection efficiency
  • Continue Physics
    • Store length = 30 min
  • More vernier scans
  • PHENIX zero field run
    • Prior to tour access
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
  • NO MEETING TOMORROW
heavy ion run update 4 25 26 11
Heavy Ion Run Update 4/25-26/11
  • MD for Yellow
    • Delayed by Booster failure
    • Yellow orbit work: 1 hour
      • Injection efficiency up > 10%
      • No BLM issues since
    • Initial collimation work: 1 hour But…
  • Blue orbit shifted
    • Why? No evidence found yet
    • Corrected blue steering for collisions
    • Re-collimated.
    • Eventually, corrected closed orbit again and resteered, collimated.
  • Outstanding items
    • Injection efficiency
      • Limits injected intensity
    • Orbit control
      • Can we correct orbit drift? Should we?
      • BPM issues?
    • Booster B3 RF, deferred troubleshooting
    • Vernier scans
    • bo6-qs3 failure
next 24 hours 4 26 27
Next 24 hours 4/26-27
  • Continue Physics
    • Store length = 30 min
  • Schedule vernier scans
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update weekend 4 22 25 11
Heavy Ion Run Update Weekend 4/22-25/11
  • Mostly continuous running
    • Over 80 stores since Friday afternoon
    • Store length reduced to 30 min
      • Optimal ~15-20 min
  • Scanned RF voltages
  • PHENIX “vertex shift”
    • Determined to be collimator backsplash from opposite ring
  • Outstanding items
    • Beam lifetime
    • Injection efficiency
      • Limits injected intensity
    • Orbit control
    • Booster B3 RF, deferred troubleshooting
    • Vernier scans
    • bo6-qs3 failure
    • Instrumentation setup
      • IPM, WCM
next 24 hours 4 25 26
Next 24 hours 4/25-26
  • Continue Physics
    • Store length = 30 min
  • Machine Development items for improved luminosity
    • Work on orbit feedback management
      • Yellow bend trim adjustment
    • Injection efficiency work
    • Beam lifetime work
      • Change working point
      • Better RF voltage choice (parasitic)?
      • Octupoles (parasitic)?
    • 10 Hz GOFB (parasitic)
  • Schedule vernier scans
  • AP shifts: on call
    • ...but be prepared to log in remotely or come in if necessary.
heavy ion run update fri 4 22 11
Heavy Ion Run Update Fri 4/22/11
  • Booster B3 RF cavity running, issues unresolved
    • Will be of concern when we start to push for maximum injector performance
  • Beam restored, captured in both rings
  • Tuned up to nominal intensities
  • Initial collision steering and collimation successful
  • Outstanding items
    • Bunched beam lifetime
    • Booster B3 RF, deferred troubleshooting
    • Store automation
weekend 4 22 24
Weekend 4/22-24
  • Start Physics
    • Store length = 1 hour?
  • Improve store conditions, store turnaround times.
    • Store automation
    • Optimize rates, minimize backgrounds
    • Increase intensities
  • AP shifts: Friday in MCR, Saturday/Sunday on call
    • ...but be prepared to log in remotely or come in if necessary.
  • NO meeting Sunday. Saturday?
heavy ion run update thu 4 21 11
Heavy Ion Run Update Thu 4/21/11
  • 28 MHz RF repairs, q7 polarity reversal complete Wed ~2300
  • Beam restored to both rings
  • Intensities too low for RF capture
  • Beam from injectors unstable
  • Node card/UPS failure, 1007C
  • Outstanding items
    • Tunes far from design
    • Corrector strength/avg offset too high?
    • Booster B3 RF, AGS bunch merge
next 24 hours 4 21 22
Next 24 hours 4/21-22
  • Repair Booster B3 RF cavity
  • PHENIX access for tour
  • Resume RHIC injection setup
    • Circulating beam
      • Check set/measured tunes vs. Au104/6/7
      • Revert orbits to pp or med/hi Au ramps?
    • RF capture
    • Lifetime/intensity tuning
heavy ion run update wed 4 20 11
Heavy Ion Run Update Wed 4/20/11
  • 28 MHz RF acceleration cavity mechanical tuner problem
    • fRF at 9 GeV: 27.9996 MHz
    • fRF at 9.8 GeV normal injection: 28.0232 MHz
    • Cavity lower limit: 28.070 MHz
  • Setup items completed:
    • AGS-RHIC synchro
    • AGS extraction, ATR transport (twice)
    • 9.8 GeV lattice loaded
    • RHIC first turn
    • Injection kicker setup, circulating beam Blue and Yellow
    • Blue RF capture
next 24 hours 4 20 21
Next 24 hours 4/20-21
  • Access to repair RF cavity tuners
  • Reverse q7 polarities, switch to IBS lattice.
  • Address other maintenance items
    • AGS main magnet motor maintenance
  • Resume RHIC injection setup
    • 9.8 GeV, Au11v3
    • First turn
    • Circulating beam
    • RF capture
    • Lifetime/intensity tuning
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