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RHIC some slides from the ops efficiency review

RHIC some slides from the ops efficiency review. Q3. What actions have been taken to optimize the accelerator operations efficiency over the past five years and what cost savings have been realized?

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RHIC some slides from the ops efficiency review

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  1. RHICsome slides from the ops efficiency review Q3. What actions have been taken to optimize the accelerator operations efficiency over the past five years and what cost savings have been realized? Q4. What is the feasibility and impact of the proposed accelerator facility five year plan (FY 2008 - FY 2012) for optimizing operations efficiency and realizing additional cost savings? For RHIC: optimizing operations efficiency means maximizing Int(L)/$ for Au-Au and Int(LP4)/$ for p- p

  2. PHOBOS 10:00 o’clock BRAHMS 2:00 o’clock Jet Target 12:00 o’clock RHIC PHENIX 8:00 o’clock STAR 6:00 o’clock RF 4:00 o’clock LINAC NSRL Booster AGS Tandems RHIC – a high luminosity (polarized) hadron collider Operated modes (beam energies): Au–Au 10, 28, 31, 65, 100 GeV/n d–Au* 100 GeV/n Cu–Cu 11, 31, 100 GeV/n p–p 11, 31, 100, 205, 250 GeV Possible future modes: Au – Au 2.5 GeV/n (AGS, SPS c.m. energy) p – Au* 100 GeV/n (*asymmetric rigidity) Achieved peak luminosities (100 GeV, nucl.-nucl.): Au–Au 581030 cm-2 s -1 p–p 351030 cm-2 s -1 Other large hadron colliders (scaled to 100 GeV): Tevatron (p – pbar) 231030 cm-2 s -1 LHC (p – p, design) 1401030 cm-2 s -1

  3. RHIC design and achieved parameters

  4. Delivered luminosity and polarization during last 5 years (Q3) 65% 47% 46% Luminosity: Increased 100 x Polarization: Increased 3 x FOM=LP4 Increased 10,000 x 34% 15% • Major improvements: warm sections NEG coating, cold sections vacuum pumps, AGS Siberian snakes

  5. Performance limitations with partial to-do list • Intra-beam scattering (heavy ions) • Low dispersion lattice • Stochastic (in progress) and electron cooling at 100 GeV/n • Dynamic pressure rise from electron clouds • NEG coating of warm sections  • Pre-pumping of cold sections  • Instabilities (at transition) • Adjust chromaticity (chromaticity jump?) • Reduce electron clouds • Fast transverse damper • Beam-beam (light ions and protons) • Eliminate ~10 Hz orbit oscillation (in progress) • Non-linear chromaticity correction (in progress) • New working point ? • Electron lens ?? • Polarization (protons) • AGS: strong partial snake  • AGS: horizontal tune in spin tune gap (in progress) • RHIC: 100 GeV:  • RHIC: 250 GeV: ring alignment, orbit correction

  6. Run-7 (President Budget request) (Q3) 30 weeks of cryo operation ½ week warm-up 12 weeks of A-A physics 10 weeks p-p physics 3 week set-up/ramp-up A-A 3 weeks set-up/ramp-up p-p 1 ½ week cool down 80K to 4K • Over last five years reduced cool-down/warm-up from 5 weeks to 2 weeks and reduced set-up/ramp-up from 2x5 weeks to 2x3 weeks  total reduction of operations overhead from 15 weeks to 8 weeks per year! • LN2 cooler, He refrigerator improvements • Automation, beam-based feed-back

  7. RHIC Cryogenic System Power Consumption Progress (Q3) • Carnot efficiency improved from 9% to 15% (JLab consulting) (saved 4 MW) • Further improvements underway

  8. Calendar time in store after setup (Q3) Goal 100h/week Rest of the time: ~ 17 % machine tuning/ramping ~ 11 % machine studies ~ 7 % maintenance and access ~ 15 % failures • Over last five years increased time in store from 25% (42 hrs/week) to 50% (85 hrs/week) • system reliability upgrades, automation

  9. Goals for RHIC Enhanced Design Performance (~2008*) (Q4) * First 250 GeV p-p physics run currently scheduled for 2009.

  10. Improving Time in Store (Q4) • 1) Cool-down and warm-up (now 1 ½ + ½ weeks, close to limit): • Increase of cooling capacity (AIP) • 2) Set-up/ramp-up time (now ~ 3 weeks / mode, limit ~ 2 weeks): • More automation and beam-based feed-back and use of stored archives • Already achieved 2 ½ weeks • 3) Tuning, refill and ramping (now ~ 17 %, limit ~ 12 % ): • Improved automation and reproducibility of RHIC and Injectors • EBIS replacement of Tandem (inconsistent performance of stripping foils) • Challenging to make much progress with short (4 hour) stores • 4) Machine development and accelerator physics experiment (now ~ 11 %, limit ~ 8 %): • Required to reach short and long term performance goals • 5) Maintenance and accesses (now ~ 7 %, limit ~ 4 % ): • Scheduled maintenance every 2 weeks is optimal • Strict maintenance planning and coordination to minimize turn-on problems • 6) Failures (now ~ 15 %, goal: “as low as possible” ): see next slide • Could gain about 1 week of physics with 1) and 2) and reach about 102 hrs/week (61 %) of time in store with 3) through 5). Additional benefit may come from failure reduction.

  11. Improving system reliability (Q4) Run-6 system failure analysis (analysis done every year) • Special focus for reliability improvements: • RHIC Power supplies: climate control of PS buildings • Controls: upgraded UPS and back-up systems • Access controls: Replace gate switches and access doors

  12. Beam-based tune and coupling feed-back (Q4) • High precision control of tune and coupling • All settings are recorded and can be played back on future ramps (feed-forward) • Stable operation in the presence of persistent current variations • Plan to implement chromaticity feed-back • uncertainties at beginning of FY) Peter Cameron, “Closed-loop technology speeds up beam control” CERN Courier, May 2006

  13. Accelerator Improvement and Capital Equipment projects (Q4) • Capital equipment projects: • AGS/RHIC low level rf upgrade 2005/6/7 $600k • Booster power supply interface upgrade 2006 $120k • LEBT and MEBT modification for polarized protons 2006 $100k • AGS ion pump control upgrade2005/7 $1M • RHIC Service Buildings improvement 2007/8 $550k • Load matched cryo turbines2008 $600k • Siemens motor-generator relay replacement 2008 $100k • Accelerator improvement projects: • AGS MMPS transformer 2005/6/7 $3.6M • RHIC stochastic cooling 2006/7 $1M • Cryo control upgrade 2007 $700k • Main Control Room consolidation and upgrade 2008 $1.5M • Electrical Motor Control Centers Buildings 911/930/9122008 $1M • AGS roughing pumps and vacuum gauges 2008/9 $1M • Westinghouse motor stator insulation 2008 $600k

  14. AGS Main Magnet PS Transformer (Q4) Siemens Motor-Generator • originally built in 1969 • (Siemens) • single point of failure • New AGS MMPS transformer • total replacement cost: $3.6M,AIP in FY05/06/07(Niagara-Siemens) • also expect ripple reduction during acceleration ramp • factor 2) • expected completion: Dec 2007

  15. 1012-A 1010-A 1002-B 1004-B 1008-B 1006-B RHIC Service Building improvements (Q4) • 6 RHIC Service Building house PS and other equipment • replacement value of installed PS equipment is about $10M • Approved GPP project supplemented with ops and AIP funds • expect 1-2 days/run in failure reduction and lifetime extension of installed equipment

  16. Main Control Room upgrade (Q4) Consolidation of all controls in one room • current MCR, cryo control room, Collider-Accelerator Support, Siemens watch • reduction of 24h personnel; better communication More consoles (more machines in the future: EBIS, ERL, e-cooling, eRHIC) Better ergonomics and integration of operations support activities. Funding through GPP/AIP now Upgrade plan

  17. RHIC longitudinal stochastic cooling (Q4) • AIP in FY06/07: • to built a system for the Blue ring • upgrade the Yellow system • Stochastic cooling system is expected to reduce or stop heavy ion beam debunching, leading to: • 20-50% luminosity increase • smaller vertex region • experimental background reduction • reduced demands on gap cleaner

  18. Summary • Q3. What actions have been taken to optimize the accelerator operations efficiency over the past five years and what cost savings have been realized? • 100 x increased luminosity; 3 times increased polarization (10,000 x increased FoM)warm sections NEG coating, AGS snakes, cold sections vacuum pumps • Increased time-in-store from 42 hrs (25%) to 85 hrs (50%) per weeksystem reliability upgrades, automation • Reduced operations overhead from cool-down/set-up from 15 weeks to 8 weeks/yearLN2 cooler, automation, beam-based feed-back • Reduced power consumption of RHIC refrigeratorAIPs and CE to increase refrigerator Carnot efficiency from 9% to 15% (saved 4 MW) • Q4. What is the feasibility and impact of the proposed accelerator facility five year plan (FY 2008 - FY 2012) for optimizing operations efficiency and realizing additional cost savings? • 1.6 x increased luminosity (Au-Au); 7.5 x increased luminosity (pp); 70% polarization (10x FoM)increased beam intensity, reduced beam-beam effects, stochastic cooling, further pol. improvements in AGS (AIPs, CE) • Increased time-in-store to > 100 hrs/week (60%)further automation, improved system reliability (AIPs), improved infrastructure (AIPs, CE), EBIS • Reduced and more efficient 24 hr operation staffingEBIS, consolidated Main Control Room ( - ~ 1.5M$) • Further reduced power consumption of RHIC refrigerator Additional cold turbine, load-matched turbine (save up to 1.8 MW)

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