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Title: Industrialization of the nitrogen-doping preparation for SRF cavities for LCLS-II

Abstract

The Linac Coherent Light Source II (LCLS-II) is a new state-of-the-art coherent X-ray source being constructed at SLAC National Accelerator Laboratory. It employs 280 superconducting radio frequency (SRF) cavities in order operate in continuous wave (CW) mode. To reduce the overall cryogenic cost of such a large accelerator, nitrogen-doping of the SRF cavities is being used. Nitrogen-doping has consistently been shown to increase the efficiency of SRF cavities operating in the 2.0 K regime and at medium fields (15–20 MV/m) in vertical cavity tests and horizontal cryomodule tests. While nitrogen-doping’s efficacy for improvement of cavity performance was demonstrated at three independent labs, Fermilab, Jefferson Lab, and Cornell University, transfer of the technology to industry for LCLS-II production was not without challenges. Here in this paper, we present results from the beginning of LCLS-II cavity production. We discuss qualification of the cavity vendors and the first cavities from each vendor. Finally, we demonstrate that nitrogen-doping has been successfully transferred to SRF cavity vendors, resulting in consistent production of cavities with better cryogenic efficiency than has ever been achieved for a large-scale accelerator.

Authors:
 [1];  [2];  [1];  [3];  [3];  [2];  [2];  [2];  [3];  [2];  [3];  [2];  [1];  [2];  [2];  [2];  [3]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1457217
Alternate Identifier(s):
OSTI ID: 1417625; OSTI ID: 1430659
Report Number(s):
FERMILAB-PUB-17-660-TD
Journal ID: ISSN 0168-9002; PII: S0168900217312767; TRN: US1801078
Grant/Contract Number:
AC02-76SF00515; AC02-07CH11359; AC02-76F00515
Resource Type:
Journal Article: Published Article
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 883; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; SRF; Cavity; Accelerator; Niobium; Superconducting; Nitrogen-doping; 43 PARTICLE ACCELERATORS

Citation Formats

Gonnella, D., Aderhold, S., Burrill, A., Daly, E., Davis, K., Grassellino, A., Grimm, C., Khabiboulline, T., Marhauser, F., Melnychuk, O., Palczewski, A., Posen, S., Ross, M., Sergatskov, D., Sukhanov, A., Trenikhina, Y., and Wilson, K. M. Industrialization of the nitrogen-doping preparation for SRF cavities for LCLS-II. United States: N. p., 2017. Web. doi:10.1016/j.nima.2017.11.047.
Gonnella, D., Aderhold, S., Burrill, A., Daly, E., Davis, K., Grassellino, A., Grimm, C., Khabiboulline, T., Marhauser, F., Melnychuk, O., Palczewski, A., Posen, S., Ross, M., Sergatskov, D., Sukhanov, A., Trenikhina, Y., & Wilson, K. M. Industrialization of the nitrogen-doping preparation for SRF cavities for LCLS-II. United States. doi:10.1016/j.nima.2017.11.047.
Gonnella, D., Aderhold, S., Burrill, A., Daly, E., Davis, K., Grassellino, A., Grimm, C., Khabiboulline, T., Marhauser, F., Melnychuk, O., Palczewski, A., Posen, S., Ross, M., Sergatskov, D., Sukhanov, A., Trenikhina, Y., and Wilson, K. M. Sat . "Industrialization of the nitrogen-doping preparation for SRF cavities for LCLS-II". United States. doi:10.1016/j.nima.2017.11.047.
@article{osti_1457217,
title = {Industrialization of the nitrogen-doping preparation for SRF cavities for LCLS-II},
author = {Gonnella, D. and Aderhold, S. and Burrill, A. and Daly, E. and Davis, K. and Grassellino, A. and Grimm, C. and Khabiboulline, T. and Marhauser, F. and Melnychuk, O. and Palczewski, A. and Posen, S. and Ross, M. and Sergatskov, D. and Sukhanov, A. and Trenikhina, Y. and Wilson, K. M.},
abstractNote = {The Linac Coherent Light Source II (LCLS-II) is a new state-of-the-art coherent X-ray source being constructed at SLAC National Accelerator Laboratory. It employs 280 superconducting radio frequency (SRF) cavities in order operate in continuous wave (CW) mode. To reduce the overall cryogenic cost of such a large accelerator, nitrogen-doping of the SRF cavities is being used. Nitrogen-doping has consistently been shown to increase the efficiency of SRF cavities operating in the 2.0 K regime and at medium fields (15–20 MV/m) in vertical cavity tests and horizontal cryomodule tests. While nitrogen-doping’s efficacy for improvement of cavity performance was demonstrated at three independent labs, Fermilab, Jefferson Lab, and Cornell University, transfer of the technology to industry for LCLS-II production was not without challenges. Here in this paper, we present results from the beginning of LCLS-II cavity production. We discuss qualification of the cavity vendors and the first cavities from each vendor. Finally, we demonstrate that nitrogen-doping has been successfully transferred to SRF cavity vendors, resulting in consistent production of cavities with better cryogenic efficiency than has ever been achieved for a large-scale accelerator.},
doi = {10.1016/j.nima.2017.11.047},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 883,
place = {United States},
year = {Sat Dec 02 00:00:00 EST 2017},
month = {Sat Dec 02 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.nima.2017.11.047

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