High gradient performance and quench behavior of a verification cryomodule for a high energy continuous wave linear accelerator

Posen, S.; Cravatta, A.; Checchin, M.; Aderhold, S.; Adolphsen, C.; Arkan, T.; Bafia, D.; Benwell, A.; Bice, D.; Chase, B.; Contreras-Martinez, C.; Doolittle, L.; Fuerst, J.; Gonnella, D.; Grassellino, A.; Grimm, C.; Hansen, B.; Harms, E.; Hartsell, B.; Hays, G.; Holzbauer, J.; Hoobler, S.; Kaluzny, J.; Khabiboulline, T.; Kucera, M.; Lambert, D.; Legg, R.; Lewis, F.; Makara, J.; Maniar, H.; Maniscalco, J. T.; Martinello, M.; Nelson, J.; Paiagua, S.; Pischalnikov, Y.; Prieto, P.; Reid, J.; Ross, M.; Serrano, C.; Solyak, N.; Syed, A.; Sun, D.; Tatkowski, G.; Wang, R.; White, M.; Zacarias, L.

doi:10.1103/PhysRevAccelBeams.25.042001

Title: High gradient performance and quench behavior of a verification cryomodule for a high energy continuous wave linear accelerator

Journal Article · Mon Apr 04 00:00:00 EDT 2022 · Physical Review Accelerators and Beams

DOI:https://doi.org/10.1103/PhysRevAccelBeams.25.042001· OSTI ID:1861215

; Cravatta, A.; Checchin, M.; Aderhold, S.; Adolphsen, C.; Arkan, T.; Bafia, D.; Benwell, A.; Bice, D.; Chase, B.; Contreras-Martinez, C.; Doolittle, L.; Fuerst, J.; Gonnella, D.; Grassellino, A.; Grimm, C.; Hansen, B.; Harms, E.; Hartsell, B.; Hays, G. more »

An 8-cavity, 1.3 GHz, LCLS-II-HE cryomodule was assembled and tested at Fermilab to verify performance before the start of production. Its cavities were processed with a novel nitrogen doping treatment to improve gradient performance. The cryomodule was tested with a modified protocol to process sporadic quenches, which were observed in LCLS-II production cryomodules and are attributed to multipacting. Dedicated vertical test experiments support the attribution to multipacting. The verification cryomodule achieved an acceleration voltage of 200 MV in continuous wave mode, corresponding to an average accelerating gradient of 24.1 MV/m, significantly exceeding the specification of 173 MV. The average Q₀ (3.0x10¹⁰) also exceeded its specification (2.7x10¹⁰). After processing, no field emission was observed up to the maximum gradient of each cavity. This paper reviews the cryomodule performance and discusses operational issues and mitigations implemented during the several month program.

View Journal Article

Cite

Export

Save

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Contributing Organization:: LCLS-II Collaboration

Grant/Contract Number:: AC05-06OR23177; AC02-76F00515; AC02-05CH11231; AC02-07CH11359

OSTI ID:: 1861215

Alternate ID(s):: OSTI ID: 1833314; OSTI ID: 1871643; OSTI ID: 1958290

Report Number(s):: FERMILAB-PUB-21-589-TD; arXiv:2110.14580; PRABCJ; 042001

Journal Information:: Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Vol. 25 Journal Issue: 4; ISSN 2469-9888

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

References (8)

Quench-Induced Degradation of the Quality Factor in Superconducting Resonators Checchin, M.; Martinello, M.; Romanenko, A. Physical Review Applied, Vol. 5, Issue 4 https://doi.org/10.1103/PhysRevApplied.5.044019	journal	April 2016
Effect of interstitial impurities on the field dependent microwave surface resistance of niobium Martinello, M.; Grassellino, A.; Checchin, M. Applied Physics Letters, Vol. 109, Issue 6 https://doi.org/10.1063/1.4960801	journal	August 2016
Nitrogen and argon doping of niobium for superconducting radio frequency cavities: a pathway to highly efficient accelerating structures Grassellino, A.; Romanenko, A.; Sergatskov, D. Superconductor Science and Technology, Vol. 26, Issue 10 https://doi.org/10.1088/0953-2048/26/10/102001	journal	August 2013
Dependence of the residual surface resistance of superconducting radio frequency cavities on the cooling dynamics around T _c Romanenko, A.; Grassellino, A.; Melnychuk, O. Journal of Applied Physics, Vol. 115, Issue 18 https://doi.org/10.1063/1.4875655	journal	May 2014
Role of magnetic flux expulsion to reach $Q_{0} > 3 \times 10^{10}$ in superconducting rf cryomodules Posen, S.; Wu, G.; Grassellino, A. Physical Review Accelerators and Beams, Vol. 22, Issue 3 https://doi.org/10.1103/PhysRevAccelBeams.22.032001	journal	March 2019
Superconducting TESLA cavities Aune, B.; Bandelmann, R.; Bloess, D. Physical Review Special Topics - Accelerators and Beams, Vol. 3, Issue 9 https://doi.org/10.1103/PhysRevSTAB.3.092001	journal	September 2000
RF Superconductivity Padamsee, Hasan https://doi.org/10.1002/9783527627172	book	March 2009
Ultra-high quality factors in superconducting niobium cavities in ambient magnetic fields up to 190 mG Romanenko, A.; Grassellino, A.; Crawford, A. C. Applied Physics Letters, Vol. 105, Issue 23 https://doi.org/10.1063/1.4903808	journal	December 2014

Similar Records

Plasma cleaning of the SLAC Linac Coherent Light Source II high energy verification cryomodule cavities

Journal Article · Wed Oct 12 00:00:00 EDT 2022 · Physical Review Accelerators and Beams · OSTI ID:1861215

Giaccone, B.; Berrutti, P.; Martinello, M.; +14 more

Multipacting Processing in Cryomodules For LCLS-II And LCLS-II-HE

Conference · Thu Jun 29 00:00:00 EDT 2023 · OSTI ID:1861215

Cravatta, A.; Arkan, T.; Bafia, D.; +12 more

Quench Studies of Six High Temperature Nitrogen Doped 9 Cell Cavities for Use in the LCLS-II Baseline Prototype Cryomodule at Jefferson Laboratory

Conference · Tue Sep 01 00:00:00 EDT 2015 · OSTI ID:1861215

Palczewski, Ari; Geng, Rongli; Eremeev, Grigory; +1 more

Related Subjects

43 PARTICLE ACCELERATORS
Cryogenics & vacuum technology
Superconducting RF
Superconductivity
Linear accelerators
Accelerators & Beams

Title: High gradient performance and quench behavior of a verification cryomodule for a high energy continuous wave linear accelerator

Citation Formats

References (8)

Similar Records

Related Subjects