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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



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


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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