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B-Factory Operations and Plans

B-Factory Operations and Plans. John T. Seeman Assistant Director of the Technical Division Head of the Accelerator Department DOE PEP-II Operations Review June 15, 2004. Topics. Mission Operations Organization and Planning The PEP-II Collider Risks PEP-II Future Upgrades

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B-Factory Operations and Plans

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  1. B-Factory Operations and Plans John T. Seeman Assistant Director of the Technical Division Head of the Accelerator Department DOE PEP-II Operations Review June 15, 2004

  2. Topics • Mission • Operations Organization and Planning • The PEP-II Collider • Risks • PEP-II Future Upgrades • Safety and Reliability • Conclusions

  3. SLAC’s Mission • To provide a respectful and safe environment to promote research. • To operate, maintain and upgrade all SLAC accelerator systems to maximize their high energy physics output. • To develop the conceptual framework and technology needed for the next generation of accelerators and to advance the science of accelerator physics. • To manage the construction and commissioning of new accelerator systems. • To contribute to the development of the technology needed for the next generation of detectors. • To provide Laboratory support and services in the areas of our scientific engineering and technical expertise. • To perform the research and development necessary to accomplish our mission effectively.

  4. Accelerator Department Organization

  5. Other TD Departments contributing to PEP-II • Mechanical Design • Mechanical Fabrication (MFD) • Electronics and Software Engineering (ESD) • Power supplies, diagnostics, RF and controls • Metrology • Alignment and magnetic measurements • Site Engineering and Maintenance (SEM) • Power, water and buildings • Advanced Computation (ACD) • Wakefield and HOM calculations • Klystron • Klystron production and RF • Accelerator Research A (ARDA) • Accelerator theory and bunch feedback

  6. Current Accelerator Program • The PEP-II B-Factory provides high energy physics data to the BaBar detector running about 10 months per year. • Upgrade plan is to increase the peak luminosity by a factor of about 2.6 over the next few years. • Linac beams are provided to other programs using linac pulses not used by PEP-II injection. • The linac runs at 30 Hz. PEP-II uses, on average, only about 10 to 15 Hz.

  7. Beam Lines

  8. PEP-II e+e- Collider BaBar Detector • Use the SLAC linac as upgraded for the SLC for the injector. HER RF 476 MHz LER RF 476 MHz Feedbacks Diagnostics 3.1 GeV positrons x 9 GeV electrons C = 2200 m

  9. The PEP-II e+e- asymmetric collider

  10. PEP-II Interaction Region Components near BaBar LER HER BaBar Collision point

  11. Contributors to PEP-II • SLAC • LBNL • LLNL • With help from: • IHEP, Beijing, China • BINP, Novosibirsk, Russia • INFN, Frascati, Italy • CEA, Saclay, France • IN2P3, Paris, France • Caltech • BNL • Many people from the BaBar Collaboration • Visitors from CERN, DESY, Cornell, FNAL, KEK, …

  12. Internal PEP-II Reviews and Meetings • Daily (seven days) 8:00 am Program meeting • Daily (seven days) 8:15 am BaBar/PEP-II meeting • Five days/week Maintenance meetings (8:15 am) • Twice/week PEP-II Group meetings • Weekly Tech Division Construction Project reviews • Weekly PEP-II / BaBar Strategy Meeting • Semi-monthly PEP-II Evaluation Meeting with Upper SLAC Management • Weekly Shut-Down Planning meetings starting three months before the down, continuing during the down. • PEP-II End of Run “Lessons Learned Briefings” • PEP-II Workshops on Performance • 1) December 15-16, 1999 • 2) December 6-7, 2000 • 3) January 30-February 1, 2002

  13. External PEP-II Reviews • Annual DOE Site Visits • Annual DOE Program Reviews • Semi-annual Scientific Policy Committee • Semi-annual Experimental Physics Advisory Committee • Semi-annual BaBar International Finance Committee • Quarterly BaBar Collaboration meetings • PEP-II Machine Advisory Committee • 1) Jan 4-6, 1995 • 2) August 24-25, 1995 • 3) April 11-13, 1996 • 4) January 6-8, 1997 • 5) November 10-13, 1997 • 6) December 14-16, 1998 • 7) October 9-11, 2003 • 8) April 15-17, 2004 • 9) December 13-15, 2004 (planned)

  14. Continuous Injection (Trickle Charge) Both Beams Luminosity LER I+ HER I-

  15. Peak luminosity of 9.21 x 1033 Record Peak Luminosity

  16. Daily Integration Record 710/pb

  17. Examples of PEP-II Performance Measures

  18. >90/fb! Actual delivered luminosity 90 fb-1 Actual delivered luminosity Goal set in July 2003

  19. Overall Parameters and Goals Twice design! Over three times design Over five times design!

  20. PEP-II Risks • Items which could cause prolonged downs or sustained reduced luminosity for PEP-II: • AC power costs (See G. Loew’s talk) (~1 month) • Many PEP-II klystrons (total 11 klystrons now and adding 4 more) are reaching 30k+ hours (10% loss in luminosity per lost klystron, 1 year to build, 600 k$ each, 4 in production now, start 2 more?) • Support tube vacuum chambers (Be-bellows, B1R, B1L, Q1R and Q1L, ~7 month down w/o spare, ~4 month with spare, B1+Q1 spares sum to 2000 k$.) • HER and LER Chopper Bulk Power Supplies (~1 month, new ~1000 k$) • Injection septa for HER and LER (~1 month, spare parts for 200 k$) • Shortage of Physics (Engineering) staff for Machine Development delays luminosity growth rate (44 accelerator shift takers in 1999, 12 in June 2004. The 12 are also involved with upgrade designs)

  21. PEP-II Staffing Issues • The operation of PEP-II is thin (lean) on support staff due to staff reductions from past reduced budgets. (We do still try very hard!) • Experimental Accelerator Physicists are down by 40%. (+5 people would be very helpful) • Area Technical Managers down by 33%. (+2 would help) • PEP-II Mechanical Engineers were down by 40% but has recovered by 25%. (Thanks SPEAR-3!) (+2 would help) • RF Engineers/physicists were down by 50% but recovered by 25%. (+2 would help) • Electrical Engineers are down by 30%. (+3 would help) • Vacuum, Mechanical, and Electrical Technicians are down by about 20%. (+10 to +20 would help) • Accelerator Operator numbers steady. (Good!) • Part-time outside help has gone up substantially! (NLC, BaBar, LBNL, SPEAR, Universities) (Many thanks!)

  22. PEP-II Long Range Beam Parameters Goals • April 2004: 2.5A x 1.5 A by*=11 mm 1555 bunches L=9.2E33 • July 2004: 2.6A x 1.6 A by*=10 mm 1600 bunches L=10E33 • June 2005: 3.3A x 1.8 A by*=9 mm 1700 bunches L=15E33 • July 2006: 3.9A x 2.0 A by*=8 mm 1720 bunches L=20E33 • July 2007: 4.5A x 2.2 A by*=8 mm 1720 bunches L=24E33 • Director’s goals: • With good integration reliability and trickle injection: • 115 fb-1 more integrated from Summer 2003 to Summer 2004. • 530 fb-1 total integrated by Fall 2006. • About 1.7 to 2.0 ab-1 integrated by Fall 2010.

  23. Future luminosity increase factors

  24. PEP-II Future Luminosity Parameters

  25. PEP-II Bunch Length Factors

  26. AIP Upgrades for SLAC Lehman “Base 2%” June 2004

  27. Expected PEP-II Delivered Integrated Luminosity

  28. Over all PEP-II Down Schedule 2004-2010 • 2004 down: August 1 to October 15 for BaBar IFR. • 2005 down: July 1 to December 31 for BaBar IFR and PEP-II support tube. • 2006 down: August-September. • 2007 down: August-September. • 2008 down: August-September. • 2009 down: August-September. • Every downtime is planned in great detail.

  29. Safety Overview Radiation Safety Non-Ionizing Radiation Safety Hazardous Experimental Equipment ALARA Electrical Safety Earthquake Safety Fire Protection Safety Hoisting and Rigging Safety Environmental Safety Radiation Safety Officer Laser Safety Officer Electrical Safety Officer Fire Marshal Crane Inspector ESH Environmental Protection Department ESH OSHA Experts ESH Industrial Hygienists Emergency Management Coordinator Citizen Committees and Subject Matter Experts

  30. Documentation Hierarchy

  31. AcceleratorDepartment Safety and Operations Documents Accelerator Operations BAS Key and Lock Procedures Hot Sheet Accelerator Operations BAS Instructions Incident Response Procedures Alarm Response Procedures Laser Safety Procedures Arcs PPS Log Linac etc Building Emergency Plan Beam Containment System Procedures Linac PPS Log BSOIC Certification Checklists Logging Requirement for Work… BSY PPS Log MCC Building Manager Checklists CID PPS Log MCC Emergency Plan DRIP/DR PPS Log MCC Key Safe Checkout Electrical Hazard Test Procedures PEP PPS Log Emergency Notification Form PEP PPS Overview Entry and Exit Procedures PLS Keys Procedures and Log Equipment Checkout Log Positron PPS Log ESA PPS Log PPS Interlock Checklists FFTB PPS Log PPS Zone Maps Final Focus PPS Log Safety Configuration Control Fire Alarm System Reference Manual Safety Inspection Checklists Guidelines for Work in SLAC Accelerator Housings Search Procedures Gun Test Lab Safety Procedure VVS Remote Turn-on Procedure High Voltage Test Facility Safety Procedures Warning Response Procedures

  32. ARTEMIS (Maintenance ) • ARTEMIS (Accelerator Remedy Trouble Entry and Maintenance Information System) is an Oracle database with a Remedy interface, accessible over the internet by everyone involved with SLAC accelerator maintenance. • Operators report problems as they occur by making entries in ARTEMIS. • Repair work is launched immediately if the problem is inhibiting the scheduled accelerator program. • New ARTEMIS entries are reviewed at the daily maintenance meeting. Open questions are addressed and jobs are assigned. • Jobs may be assigned to the Standby Maintenance List (SML), or to the Repair Opportunity Day (ROD) list, or marked for the next long down time. • Jobs are tracked using ARTEMIS until they are finally closed.

  33. ARTEMIS Example Sample from the June 10 maintenance meeting.

  34. Assessment of Accelerator Time

  35. General In-depth Accelerator Self-Assessments • 2004: ‘Linac’ (includes DRs, BSY, ESA) • 2003: GTL, GTF, HVTF, ASTA • 2002: SPEAR • 2001: NLCTA • 2000: PEP II • 1999: ‘Linac’

  36. Conclusions • PEP-II has reached a luminosity of 9.2 x 1033/cm2/s with trickle injection. • PEP-II has integrated 710 pb-1 in one day. • PEP-II has delivered a total of over 230/fb so far! • Near term and long range upgrades are going well. • Progress for upgrades towards 2.4 x 1034 are on track. • PEP-II collider has a good safety record. • We work daily to make it better. • We have internal and external reviews of our program. • We set yearly performance goals and track them daily-weekly-monthly. • We perform regular in-depth safety reviews of all our accelerators. • We are actively working to make our accelerator more reliable.

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