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Vertical Test Area RF qualification of C100 cavities for 12 GeV project

Vertical Test Area RF qualification of C100 cavities for 12 GeV project. Mircea Stirbet. Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland. Key Project Parameters. CEBAF 12 GeV Upgrade. CHL-2.

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Vertical Test Area RF qualification of C100 cavities for 12 GeV project

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  1. Vertical Test Area RF qualification of C100 cavities for 12 GeV project Mircea Stirbet Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  2. Key Project Parameters CEBAF 12 GeV Upgrade CHL-2 New cryomodules: 10 Voltage per cryomodule:  108 MV avg. Cavities per cryomodule 8 Heat budget: @ 2.07 K  300 W / CM  29 W / cavity, avg. Cavity: 1.497 GHz 0.7 m “Low loss” cell shape Higher order mode damping: • Transverse (R/Q)Qk < 2.4 x 1010Ω/m • Longitudinal (R/Q)Q < 6.5 x 1011Ω /m Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland New cryomodules get new rf zones

  3. Principles • All cavities (R100 and C100) for 12 GeV project should be qualified in Vertical Test Area (VTA) before being string assemble. • VTA tests will be done on cavities with or without He vessels. Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  4. State-of-the-art production SRF cavity Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  5. 12 GeV C100 Cavity Process Flow Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  6. Vertical test Area (VTA): Qualification tests • HOM survey • RF power qualification: • Cavity performances: Lock frequency, Emax, FE onset, Radiation, test limits, cavity vacuum. • Qo vs Eacc • Rad vs Eacc • HOM A and HOM B vs Eacc • Delta Freq vs Eacc2 • Qo vs T • Data mining and analysis for eventual corrective • actions for the process flow. Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  7. Vertical test Area (VTA): Landing area and control room Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  8. Vertical test Area (VTA): Dewars area Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland Vertical test Area (VTA): Dewars and control room

  9. Vertical test Area (VTA): HOM survey • Specifications • Measurement methods : manual and enhanced Polfit package based on Carsten’s and Hans Walter method to extract loaded Q from measured scattering parameters. Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  10. Vertical test Area (VTA): HOM survey cont. Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  11. Operator interface – low loss cavity LL002 at 44 MV/m Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  12. Operator interface – LabView program Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  13. Data acquisition, traveler, Excel macro Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  14. Qo and Rad vsEacc Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  15. HOM A and HOM B power vsEacc Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  16. Lorentz coefficient Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  17. 1/Qovs temp Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  18. Emax of VTA Qualified Cavities for 12 GeV Upgrade Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  19. Emax of VTA Qualified Cavities for 12 GeV Upgrade Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  20. Qualified Cavities for 12 GeV Upgrade Cryomodule C100-3 Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  21. Data mining Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  22. Data mining Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  23. Data mining Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  24. Issues during VTA qualification tests • Cables (some trivial – cables not connected, broken connectors supposed to operate at low temperature). • Lambda vacuum leaks. • Occasional high radiation levels –> all cavities are now radiation monitored after VTA tests. • Clean room over crowed (sometimes). • Glycol spill. • Vibration due to demolition , fumes and dust from construction area, power outages. Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  25. 12 GeV Upgrade CavitiesProduction Tracking System Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  26. C100 string assembly All remaining cavity strings should be clean room assembled by the middle for Feb 2012 Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  27. Cryomodule assembly • All 80 cavities will be VTA qualified by mid Dec 2011 – important effort to qualify at least 3 cavities each week! • 3 Cryomodules installed and commissioned in CEBAF machine (R100 and 2 C100). • C100-3 advanced qualification tests in CMTF • 7 cavity strings in different phases of assemble • All reaming cavity strings should be clean room assembled by the middle of February 2012. Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  28. VTA operator team for 12 GeV project Cryogenie support Pete Kushnick Tiffany Bass Danny Forehand Pansophy support Valery Bookwalter Bonnie Madre Melody Jones Crane operators Chris Dreyfus Steve Castagnola Tom Goodman Danny Forehand Roland Overton Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  29. TUPO061 SRF 2011 Chicago, July 25-29, 2011 Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

  30. Conclusions Almost all cavities for 12 GeV project are qualified. Thank you !!! Open Collaboration Meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-1) 8/9 December 2011 CERN – Geneva Switzerland

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