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WG4 Session Outline

WG4 Session Outline. Baseline Lattice Evaluation – Tuesday Morning OCS8 FODO4 a FODO5 DCO ATF Status and Plans – Tuesday Afternoon CesrTA Discussion – Wednesday Morning Electron Cloud Status Reports – Wednesday Afternoon Closeout. Updated Baseline Lattice Parameters.

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WG4 Session Outline

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  1. WG4 Session Outline • Baseline Lattice Evaluation – Tuesday Morning • OCS8 • FODO4 a FODO5 • DCO • ATF Status and Plans – Tuesday Afternoon • CesrTA Discussion – Wednesday Morning • Electron Cloud Status Reports – Wednesday Afternoon • Closeout Global Design Effort

  2. Updated Baseline Lattice Parameters Max. value for bunch compressors Updated target (previously 4×10-4) Global Design Effort

  3. Lattice Options OCS8 (TME) From the Damping Rings R&D Workshop at KEK, A. Wolski, December 2007 FODO Refined Version 4 aVersion 5 Global Design Effort

  4. DCO at a glance Global Design Effort

  5. Parameter Comparisons Global Design Effort

  6. Lattice Evaluation • The 4 lattices were evaluated on 8 criteria: • Lattice Design and Dynamical Properties • Conventional Facilities and Layout • Magnets, Supports and Power Supplies • Vacuum System and Radiation Handling • RF System • Injection and Extraction Systems • Instrumentation and Diagnostics • Control System, Availability and Reliability • Rankings of 1-5 in each (5 is best) • Where insufficient data for evaluations Global Design Effort

  7. Rankings • Tight clustering due to the fact that core work on all lattices at similar level • Differences were driven by whether lower momentum compaction/shorter bunch length option was incorporated and items that affect cost, availability and reliability (eg, magnet counts, degree of clustering of major components near the two proposed access shafts, etc) Global Design Effort

  8. Recommendation • Baseline Recommendation: DCO • Alternative Recommendation: FODO5 • Many thanks to the design groups for their thorough work: • OCS • Aimin Xiao & Louis Emery (ANL-APS) • FODO • Yi-Peng Sun (now at CERN), Jie Gao (IHEP), Zhi-Yu Guo (Peking Univ.), and Wei-Shi Wan (LBNL) • DCO Designers • Andy Wolski & Maxim Korostolev (Univ. of Liverpool, CI) Global Design Effort

  9. Damping Ring Lattice Selected Global Design Effort

  10. ATF Session • Low Emittance Tuning • Kiyoshi Kubo • Fast Ion Experiments, Kicker Test, and Upcoming Run Plan • Junji Urakawa • Laser Compton Source for Polarized e+ • Tsunehiko Omori Global Design Effort

  11. Previously Achieved Emittance Kubo Vertical Dispersion, May 2003 vs Nov 2002 2003 4 pm 2002 Global Design Effort

  12. Recent Fast Ion Work Studies will continue with ongoing improvements: lower emittance, controlled pressure bump, etc. Urakawa 2007 20pm 10pm Global Design Effort

  13. Urakawa Global Design Effort

  14. CesrTA Session • Reports • Introduction, Mark Palmer • Low Emittance Tuning, Dave Rubin • Electron Cloud Program, Mark Palmer • Schedule and Status, Mark Palmer • General Discussion Global Design Effort

  15. Global Design Effort

  16. CesrTA Schedule Global Design Effort

  17. Electron Cloud Session • Update on New Cyclotron Resonances in Electron Cloud Dynamics • Christine Celata (LBNL) • Study of a Clearing Electrode at KEKB – First beam test • Yusuke Suetsugu (KEK) • Electron Cloud Study for ILC Damping Ring at KEKB and CESR • Kazuhito Ohmi (KEK) • Electron Cloud R&D • Mauro Pivi (SLAC) Global Design Effort

  18. Closeout with PMs • Lattice Selection • Cost Reduction • Proposed TDP Reorganization Wolski Global Design Effort

  19. Upcoming DR Workshop • Damping Rings R&D Workshop and CesrTA Kick-off Workshop • July 8-11, 2008 • Cornell University ILR Conference Center • Details to appear soon Global Design Effort

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