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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 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:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
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)
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; S0168900217312767; PII: S0168900217312767
Grant/Contract Number:  
AC02-76F00515; AC02-76SF00515; AC02-07CH11359
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 Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Volume: 883 Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
Netherlands
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. Netherlands: N. p., 2018. 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. Netherlands. https://doi.org/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. 2018. "Industrialization of the nitrogen-doping preparation for SRF cavities for LCLS-II". Netherlands. https://doi.org/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 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},
url = {https://www.osti.gov/biblio/1457217}, journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
issn = {0168-9002},
number = C,
volume = 883,
place = {Netherlands},
year = {Thu Mar 01 00:00:00 EST 2018},
month = {Thu Mar 01 00:00:00 EST 2018}
}

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

Citation Metrics:
Cited by: 23 works
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Works referenced in this record:

Error analysis for intrinsic quality factor measurement in superconducting radio frequency resonators
journal, December 2014


Production of superconducting 1.3-GHz cavities for the European X-ray Free Electron Laser
journal, September 2016


Nitrogen-doped 9-cell cavity performance in a test cryomodule for LCLS-II
journal, January 2015


Efficient expulsion of magnetic flux in superconducting radiofrequency cavities for high Q 0 applications
journal, June 2016


Superconducting TESLA cavities
journal, September 2000


Works referencing / citing this record:

Two-pass two-way acceleration in a superconducting continuous wave linac to drive low jitter x-ray free electron lasers
journal, November 2019


Surface characterization of nitrogen-doped high purity niobium coupons compared with superconducting rf cavity performance
journal, December 2019