LCLS-II Cryomodule Production at JLAB

Conference · Sun Dec 31 23:00:00 EST 2017

DOI:https://doi.org/10.18429/JACoW-SRF2017-MOPB046· OSTI ID:1985229

Davis, Giles ^[1]; Legg, Robert ^[1]; Cheng, Guangfeng ^[1]; Daly, Edward ^[1]; Drury, Michael ^[1]; Fischer, John ^[1]; Hiatt, Tommy ^[1]; Huque, Naeem ^[1]; King, Lawrence ^[1]; Preble, Joseph ^[1]; Stirbet, Mircea ^[1]; Wilson, Katherine ^[1]; Reilly, Anthony ^[1]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

The LCLS-II cryomodule construction program leverages the mature XFEL cryomodule design to produce technologically sophisticated cryomodules with a minimum of R&D according to an accelerated manufacturing schedule. Jlab, as one of the partner labs, is producing 18 cryomodules for LCLS-II. To meet the quality and schedule demands of LCLS-II, many upgrades to the JLAB cryomodule assembly infrastructure and techniques have been made. JLab has installed a new cleanroom for string assembly and instituted new protocols to minimize particulate transfer into the cavities during the cryomodule construction process. JLab has also instituted a set of magnetic hygiene protocols to be used during the assembly process to minimize magnetic field impingement on the finished cavity structure. The goal has been to have gradients, both maximum and field emission onset, that do not degrade between the cavity vertical test and final cryomodule qualification, while maximizing the Q0 of each finished cavity. Results from the prototype and first production cryomodule assembly are presented.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1985229
• Report Number(s): JLAB-ACC-17-2526; DOE/OR/23177-4190
• Country of Publication: United States
• Language: English