Joe Preble EIC RF WBS Manager EIC Accelerator Partnership Workshop October 27 2021 HSR 591 MHz 5Cell Cavity Bunch Compression Crab Cavities HSR amp ESR 2 591 MHz ESR 1Cell Cavity SHC 591 MHz 5Cell and ID: 1042104
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1. Overview of Crab Cavity for EICJoe Preble, EIC RF WBS ManagerEIC Accelerator Partnership WorkshopOctober 27, 2021
2. HSR - 591 MHz 5-Cell CavityBunch CompressionCrab Cavities – HSR & ESR2591 MHz ESR 1-Cell CavitySHC- 591 MHz 5-Cell and1773 MHz 5-Cell ERL CavitiesHSR – 24.5 MHz Capture & AccelerationReuse with ModificationsHSR – Bunch Splitting (New)RCS – Bunch Merging (New)HSR - 197 MHz Bunch CompressionReuse with ModificationsScope Overview – SRF and NCRF SystemsRCS - 591 MHz 5-Cell Cavity Acceleration CavitySRF Cavity R&D Focus
3. EIC Crab Cavity OverviewIntroductionStrategyTimingSummary3
4. EIC Cab Cavities will be well covered in several talksThe system is well understood but not finalSignificant progress is being made on design and prototyping Several talks on the EIC Crab CavitySystem Technical Overview – Binping Xiao (BNL)Status of Cavity Studies – Suba de Silva (ODU)Status of FPC and HOM absorber – Wencan Xu (BNL)4Introduction
5. 5The Crab Cavity performance is critical to the success of the EICLarge crossing angleLuminosity effect ~order of magnitudeThe requirements are challengingSignificant deflecting voltage ~34 MVTight impedance budgetsRF control requirements are beyond anything done. Strategy – Retire Risk Early
6. Timing 1/26Drivers for scheduleRetire risk – Cavity down select done early, RFD selectedBoth the RFD and the DQW cavities were judged to be technically acceptableRFD design was judged to be more matureCavity R&D was started early and benefits from the ODU contribution driving the effort leveraging their experienceSupport project cost and schedule baselineThe 197 MHz cab cavity and cryomodule will be the reference design used for developing the cost and schedule estimates for the project needed for the DOE approval processFirst article cryomodule will be designed and built early
7. Timing 2/27Drivers for scheduleInstallation scheduleThe crab cryomodules go into the machine later in the scheduleTime for the development of the 394 MHz Crab cavity and cryomodule system design Time for the 197 and 394 MHz cryomodule builds
8. Summary8The crab cavity and cryomodule requirements for EIC are mature but not final.The project recognizes the risk associated with the crab system and has R&D and a first article cryomodule planned to mitigate this risk.The installation schedule for crab cryomodules results in a reasonable amount of time for the production of required cryomodules.