1 / 17

Vacuum – Much Ado about Nothing

Vacuum – Much Ado about Nothing. V. Baglin with inputs from P. Cruikshank. CERN TE-VSC, Geneva. 1. VSC Requests 2 . VSC Involved 3. Main Activities 4. Shutdown 2012 vs 2013. VSC Requests – Insulation Vacuum. Flap Valves. By-pass Valves. Consolidations. Low priority.

betrys
Download Presentation

Vacuum – Much Ado about Nothing

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. Vacuum – Much Ado about Nothing V. Baglin with inputs from P. Cruikshank CERN TE-VSC, Geneva 1. VSC Requests 2. VSC Involved 3. Main Activities 4. Shutdown 2012 vs 2013 Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  2. VSC Requests – Insulation Vacuum Flap Valves By-pass Valves Consolidations Low priority Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  3. VSC Requests – Insulation Vacuum Low priority Repair & maintenance Leak checking Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  4. Remarks : Leak Testing at t0 • Some leak testing activities must be made before splice consolidation can start i.e. the systems are still under vacuum. • Important to have status of all vacuum subsectors before major interventions • Localise the known helium leaks before venting: • - Under vacuum, temperature > 20 K, He pressure constant • - Two 8 hour days per known leak with above conditions. • - Need support from CRG to pump or pressurise circuits. • - Leaks in the same arc can be partially treated in parallel • - After venting, MSC will be asked to open priority interconnects. • - VSC will need pressure (~ 5 bar) in coldmass or c’k circuit for ~ 2 days. • Leak test all vacuum subsectors before venting: • - Under vacuum, temperature > 80 K, He pressure constant • - Two 8 hr days per arc – LSS can be made in parallel. Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  5. VSC Requests – Cold Beam Vacuum Low priority Consolidation & upgrade Maintenance & leak test & aperture check Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  6. VSC Requests – Warm Beam Vacuum BA Gauge BA Gauge Protection for the VGI NEG coated plates 2.2 m Cu chambers NEG Coated: l/r=55 All metal valve Injection Line RGA SS Module (Vacuum fired) Electrolytic copper NEG coated BA Gauge BA Gauge All Metal Valve Injection line RGA SS Transition (Vacuum fired) • NEG pilot sectors are designed to evaluate the pumping performances of NEG vacuum chambers in experimental LSS • Estimation of sticking coefficient by transmission method Low priority G. Bregliozzi et al. Proc. EPAC 2008, Genoa, Italy Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  7. VSC Requests – Warm Beam Vacuum Low priority Identification of wrong RF inserts & repair of vacuum modules Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  8. X-ray of Vacuum Modules • Some RF fingers inside vacuum modules have a bad contact due to a loose spring • It is a source of impedance • A new tool is now available to identify loose spring • Repair will require opening of the vacuum sector and NEG re-activation (~ 10 VACSEC) Courtesy J-M. Dalin Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  9. VSC Requests – Warm Beam Vacuum Low priority Consolidation & upgrade Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  10. Fast Shutters • Functional specification in work • ( R. Veness) Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  11. Consolidation of Experimental Beam Pipe See A. Ball’s presentation Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  12. VSC Involved – Insulation Vacuum See MSC+MME+CRG presentations • These projects will require VSC leak testing support Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  13. VSC Involved – Beam Vacuum • Projects will require VSC integration studies, layout drawings, new cabling, supports, system installation and commissioning Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  14. Integration of TCTVA-ZDC – LSS2 • Integration done, production and installation planning defined E. Page, J-P. Corso Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  15. Main Activities Preliminary estimations ! • Insulation vac (leaks, splice, PIMs...) • Collimator phase 1 and 2 (30 VACSEC) • Vacuum modules consolidation (10 VACSEC) • Experimental caverns 50 Wk for 6-7 teams 30-40 Wk for 8 teams 30-40 Wk for 3-4 teams Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  16. Shutdown 2012 vs 2013 • Minimise radiation dose to the personnel (LSS 3 and 7), management of radiation in 2013 will bring more constraints to the planning • Delay of leak consolidation (the leak in S34 might deteriorate) • Delay of the renovation of the PS vacuum control No major concerns Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

  17. Thank you for your attention !!! Vincent Baglin LHC Performance Workshop - Chamonix 2011 - 24-28 January

More Related