LCLSII Helium Vessel Production CM FDR Chuck Grimm

LCLS-II Helium Vessel Production CM FDR Chuck Grimm May 13, 2015

LCLS-II Helium Vessel Production CM FDR Outline: • LCLS-II Helium Vessel Design • • Cryogenic Lines Weld Joints Alternative Design Investigated Cost Differential with Cavity Vendors • Drawing Packages • Helium Vessel • Bi-Metallic Transition • Bellow • Dressed Cavity Engineering Peer Review (15 -April-2014) • Specific to Helium Vessel • Bi-Metallic Transition Qualification • Cavity Dressing and Testing • TB 9 AES 027, TB 9 AES 018, TB 9 AES 021, and TB 9 AES 035 • VTS and HTS 2

LCLS-II Helium Vessel Design • • Driven by Past ILC Cavity Experience Cryogenic Line Modifications 3

LCLS-II Helium Vessel Design • Weld Joint Configurations 4

LCLS-II Helium Vessel Design • XFEL Vessel 5

LCLS-II Helium Vessel Design • Modified XFEL Vessel Investigated as Alternative Design 6

LCLS-II Helium Vessel Design • Modified XFEL Vessel Investigated as Alternative Design 7

LCLS-II Helium Vessel Design • Production Dressed Cavity Cost Differential (Cost % Supplied by F. Marhauser) LCLS-II Design Modified XFEL Design Potential Vendors Were Asked to Cost Both Designs • Cost Differential of Helium Vessel Between Two Potential Vendors Was Less Than +/- 1% of Overall Dressed Cavity Procurement Cost • One Vendor Had Increase Cost of LCLS-II Design of 0. 04% • One Vendor Had Reduction of Cost of LCLS-II Design by 1. 36% 8

Drawing Packages • LCLS-II Production Helium Vessel • • • Helium Vessel 100% Complete and Released Four Have Been Procured and 16 Additional Under Fabrication for p. CM Drawings can be Explored in Teamcenter or Supplied in PDF Format 9

Drawing Packages • LCLS-II Production Bi-Metallic Transitions • Bi-Metallic Transition (Large) – 20 Procured for p. CM • • Bi-Metallic Transition (Small) – 40 Procured for p. CM • • Drawing Complete, Needs Small Modification Before Release Drawing Complete and Released Drawings can be Explored in Teamcenter or Supplied in PDF Format 10

Drawing Packages • LCLS-II Production Helium Vessel Bellows • • Bellows 100% Complete and Released – 20 Procured for p. CM Drawings can be Explored in Teamcenter or Supplied in PDF Format 11

LCLS-II Dressed Cavity Peer Review • Review of Prototype Dressed Cavity – April 15, 2014 • • • No issues with helium vessel More work to qualify Bi-metallic transition - Completed Production Helium Vessel is the Same • Long-Short Cavity or Short-Short Cavity has no Influence on Helium Vessel Design • Bi-Metallic Transition Qualification • • • Cold shock test sample Charpy impact test (Room Temp. and 4 K) Tensile test (Room Temp. and 4 K) FEA analysis (Room Temp. and 2 K) Many 2 K Tests Performed on Dressed Cavities at Fermilab, Jefferson Lab, and Cornell 12

Cavity Dressing and Testing • Prototype Cavity Dressing – Same Procedure for Production Dressed Cavities • • Four Cavities Successfully Dressed – TB 9 AES 027, TB 9 AES 018, TB 9 AES 021, and TB 9 AES 035 Four Cavities Successfully 2 K Tested in Vertical and Horizontal Test Cryostats with Helium Vessels Performing as Expected. 13

Conclusion • LCLS-II Production Helium Vessel Design and Drawings Complete • Vessel Successfully Reviewed and Approved in Accordance with Fermilab ES&H Manual 5031. 6 (Dressed Niobium SRF Cavity Pressure Safety) • All Components Have Been Successfully Cold (2 K) Tested (Including Lever Tuner and Magnetic Shields) • The LCLS-II Helium Vessel Design Will be Used in the p. CM and is Compatible with Using the LCLS-II Tuner and Magnetic Shields for both Prototype and Production Cryomodules 14

LCLS-II Helium Vessel Production CM FDR Thank You! 15

LCLS-II Helium Vessel Production CM FDR Back-Up Slides • Bi-Metallic Transition Qualification • Cold shock test sample Test Results Courtesy of Donato Passarelli 16

LCLS-II Helium Vessel Production CM FDR Back-Up Slides • Bi-Metallic Transition Qualification • Charpy impact test 2. 5 Test Results Courtesy of Donato Passarelli 17

LCLS-II Helium Vessel Production CM FDR Back-Up Slides • Bi-Metallic Transition Qualification • Tensile test Test Results Courtesy of Donato Passarelli 18

LCLS-II Helium Vessel Production CM FDR Back-Up Slides • Bi-Metallic Transition Qualification • FEA analysis – Large transition joint Test Results Courtesy of Donato Passarelli 19

LCLS-II Helium Vessel Production CM FDR Back-Up Slides • Bi-Metallic Transition Qualification • FEA analysis – Small transition joint Test Results Courtesy of Donato Passarelli 20