1 / 5

Proton Source Review and Recommendations Summary

Summary of the Proton Source review on July 25, 2003, addressing the shutdown schedule, Linac velocity control, cogging plan, and key findings and recommendations for beam intensity improvement. Includes feedback from Prebys and proposed shutdown status.

deloisd
Download Presentation

Proton Source Review and Recommendations Summary

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Agenda – July 25, 2003 • Run II Review feedback (prebys) • Shutdown tentative schedule (prebys+discussion) • Brief shutdown project status reports • Linac velocity control loop (Elliott) • Cogging status and plan (Bob Zwaska) • Any other business     Prebys

  2. Findings of the Review Committee wrt Proton Source • Responded to recommendations of the October 2002 review in a positive manner. • Excellent availability (better than 90%) delivering the required beam intensity. • Potentially serious supply crisis of 7835 rf power tubes for the five Linac drift tube tanks. • Averted by borrowing spare tubes from Argonne and Brookhaven. • Plan to build up the spare tube budget and pursue alternative options. • 8 GeV Booster: workhorse of the complex, • intensity per pulse of up to 5e12. • Beams for the fixed target experiment MiniBoone. • Larger throughput than for collider operation. • Loss monitor system switches off the beam when losses exceed 400 W. • Four magnet dogleg to by-pass the extraction septum magnet causes strong edge focusing. • Reduces the horizontal acceptance from 16 to 8 pi mm mrad. • New dogleg system may potentially lead to a significant increase of the intensity per pulse. • The Committee congratulates the team for this great success. Prebys

  3. Recommendations • Resources for the proton source upgrade in the Run II plan seem reasonable and adequate. • Maintain number of spare 7835 tubes at a level that allows operation for two to three years. • Leaves adequate time to develop an alternative option in case Burle Industries is not able to supply any more new or rebuilt rf power tubes. • Throughput will gradually increase from at present 4e16 particle per hour to 1.8e17. • This fourfold increase is a formidable challenge. • The beam physics work, which has so successfully started, has to be continued vigorously in order to continue to progress towards this goal. • The effort to improving the beam intensity/emittance ratio should be continued, which has been shown to have direct benefit for the Tevatron performance. Prebys

  4. Additional Recommendation • Establish an “emittance” budget for the entire accelerator chain, starting at the linac, for both longitudinal and transverse emittance. • Come up with a standard method to measure these for the linac. • Do an up-to-date study of emittance vs. intensity out of the Booster. • These will both feed into reliability and repeatability. Prebys

  5. Shutdown Status • Shutdown has been postponed two weeks (Sept. 8), and extended to 10 weeks (Nov. 17). • My tentative schedule: • Sept 8->Oct. 19 (six weeks): • Booster down for cooldown+ all work EXCEPT new RF cavities • Oct 20->Oct 26: • Booster up to begin commissioning new lattice and MI-8 magnets. We'd like the MiniBooNE hall and MI-13 secured at least part of this time, to be negotiated, so we can extract through MI-8. • Oct 27-Oct 29: • Install new RF cavities in period 15. • Oct 30->Nov. 16 (2.5 weeks): • Commissioning and studies. MiniBooNE operation possible evenings and weekends once we've established stable operation. • Nov. 17: • Complex up. • Booster at least performing at pre-shutdown levels Prebys

More Related