Cryomodule Performance Data near future Large scale Low Beta performance WG1Session1 Cavity Performance Camille Ginsburg FNAL John Mammosser JLAB Five talks were presented covering recent cavity vertical test RF performance from ID: 1042091
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1. WG-1 Session Cavity PerformanceCryomodule PerformanceData (near future/ Large scale)Low Beta performance
2. WG1-Session1 Cavity PerformanceCamille Ginsburg (FNAL), John Mammosser (JLAB)
3. Five talks were presented covering recent cavity vertical test RF performance from:KEK STF-2 cavities (Yamamoto)JLab 12GeV cavities (Reece)DESY XFEL cavities (Reschke)FNAL ILC/ProjectX cavities (Ginsburg/Ozelis)FNAL/ANL and KEK facilities, processes and procedures are a fully functional for state of the art gradients R&D is well underway for further developments
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6. What can we take for the data presented:Gradients greater then 25MV/m were easily and consistently met from all labs (KEK, DESY, FNAL, JLAB)Field emission is present in most data but not always the limit Still a few low gradient FE onsets (accidents) in all dataExample FNAL 38 9-cell tests 2010 (FNAL and some JLab)Radiation detector location and shielding different at each lab but do the data shows similar spread?
7. Additionally:Many vertical cavity tests being performedA very good opportunity to capture data and gain understandingGood diagnostic methods being applied, example is KEK (optical & thermal)Need to continue to track FE, still present in most testsField emission is usually recovered by HPR but not always (statistics are needed to further understand limits)?Small number of incidents still occur which affect cavity performance
8. Questions to the SRF community:Are we capturing the enough data to understand limits?Are the data compatible / comparable?What should be changed?
9. WG1-Session2 Low Beta Cavity PerformancePaolo Pierini (INFN), John Mammosser (JLAB)
10. Four talks were presented covering recent low beta cavity activities from:ESS (R&D Plans CEA) G. Devanz IAP (SC activities) M. BuschProject-X (Cavities/tuner FNAL) L. RistoriESS (RF simulations at RHUL) S. Molloy
11. ESS (R&D Plans CEA) G. Devanz Challenges: • High gradients ( 8 MV/m ) • High peak power couplers (~ 400 kW nominal) • Pulsed operation • Series production of spoke cavities (real 3D geometry and performance reproducibility) • Open questions : HOM Operation T° (2K or 4K) Cryomodule type … Double spoke resonators Frequency = 352.21 MHz Beta = 0.53
12. Main contributors for prototypesCNRS/IN2P3/IPN Orsay (France): cavities (2 prototypes), couplers ( 2proto types), tuners, cryomodule, preparation and test facility, WP coordination ESS BILBAO/TEKNIKER (Spain): cavities, tuners, engineering design (mechanical, RF)JLAB (USA) : Discussion in progress for a plug- compatible cavity design and prototype, independent cryomodule design
13. High beta (0.86) 704 MHz 5-cell cavities, 2 prototypesHOM couplers 1 MW power couplers, 2 prototypesMagnetic shieldingCombined fast/slow tunerESS design and prototyping activities at CEA-SaclayDesign update (2011-2012)6 high beta (0.86) 704 MHz 5-cell cavities with HOM couplers, tuner, magnetic shielding, power couplerFabrication, preparation conditioning and test of all elementsP2B (2013-216) RF Conceptual design of the cavity
14. Collaboration on ESS elliptical cavitiesCEA-Saclay : high beta cavities, power couplers, tunersESS-AB : cryomodule and cryogenicsLund-U : medium beta cavitiesRostock : HOM (RF WP8)RHUL : HOM, complex RF and multipacting simulations (RF WP8)CERN : 704 MHz test area, 4-cavity cryomodule test (beta=1 cavities)Upsala : Fully equiped test stand with horizontal cryostatJlab and DESY : On going discussions for cryomodule conceptual design comparisons
15. SC activities IAP Frankfurt325MHz CH cavity prototyping and RF testingPrototypingRF Qualification
16. CH Cavity Vertical Test Results
17. Low Beta cavities and tuner development FNAL Prototypes were fabricated industry325 MHz SSR1 DesignCavity designed and modeled RF model + Mechanical DesignTuning and trimming Processing Vertical RF testingHelium jacket completedHorizontal RF testing
18. SSR1 RF Test Results:Vertical test results Horizontal Test – excellent resultsTuner Developed
19. ESS Cavity RF Modeling (Royal Holloway):
20. Development of a simplified model:
21. Summary of WG session:Low Beta cavity projects are active and developing in all regionsCavity designModelingFabricationTesting (Good Performance)Horizontal and vertical