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Title: Medium grain niobium SRF cavity production technology for science frontiers and accelerator applications

Journal Article · · Journal of Instrumentation
 [1];  [2];  [3];  [3];  [4];  [5];  [5];  [5];  [5];  [5];  [6];  [6];  [6];  [4];  [4];  [4];  [5];  [7]
  1. BSCE Systems, Inc., Yorkktown, VA (United States); Old Dominion Univ., Norfolk, VA (United States); International Symposium On Hydrogen In Matter (ISOHIM), Yorktown, VA (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States)
  3. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  4. Old Dominion Univ., Norfolk, VA (United States)
  5. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
  6. ATI Specialty Alloys and Components, Albany, OR (United States)
  7. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
+ Show Author Affiliations

Herein we present the cost-effective production of superconducting radio frequency (SRF) cavities made of medium grain (MG) niobium (Nb) discs directly sliced from forged and annealed billet. This production method provides clean surface conditions and reliable mechanical characteristics with sub-millimeter average grain size resulting in stable SRF cavity production. We propose to apply this material to particle accelerator in the science and industrial applications. The science applications require high field gradients(≥ 30 MV/m) particularly in pulsed mode. The industrial applications require high $$Q_0$$ values with moderate gradients (~ 20 MV/m) in CW mode operation. This paper describes the MG Nb disc production recently demonstrated and discusses future prospects for application in advanced particle accelerators in the science and industrial applications.

Research Organization:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
1983614
Report Number(s):
JLAB-ACC-23-3797; DOE/OR/23177-6062; {"","Journal ID: ISSN 1748-0221"}
Journal Information:
Journal of Instrumentation, Journal Name: Journal of Instrumentation Journal Issue: 04 Vol. 18; ISSN 1748-0221
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

References (20)

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journal February 2015
Evaluation of the propensity of niobium to absorb hydrogen during fabrication of superconducting radio frequency cavities for particle accelerators journal September 2010
Electron-phonon relaxation dynamics of niobium metal as a function of temperature journal February 1994
Efficient expulsion of magnetic flux in superconducting radiofrequency cavities for high Q 0 applications journal June 2016
Development of large grain cavities journal January 2013
Measurements of heat transport in thin films by ultrafast laser-based techniques conference December 2010
Ingot Nb based SRF technology for the International Linear Collider conference January 2015
Fabrication of 1.3 GHz SRF Cavities Using Medium Grain Niobium Discs Directly Sliced from Forged Ingot text January 2022
Effect of high temperature heat treatments on the quality factor of a large-grain superconducting radio-frequency niobium cavity journal April 2013
Mechanical Properties of Directly Sliced Medium Grain Niobium for 1.3 GHz SRF Cavity text January 2022
Research and development towards duty factor upgrade of the European X-Ray Free Electron Laser linac journal May 2015
Tensile Tests of Large Grain Ingot Niobium at Liquid Helium Temperature text January 2022
Shape Evolution of C75 Large-Grain Niobium Half-Cells During Cavity Fabrication text January 2022
Superconducting radio-frequency cavities made from medium and low-purity niobium ingots journal April 2016
Superconducting cavity material for the European XFEL journal July 2015
Flux expulsion in niobium superconducting radio-frequency cavities of different purity and essential contributions to the flux sensitivity journal February 2020
Ultrafast investigation of electron dynamics in multi-layer metals journal May 2004
Evaluation of Single-Cell Cavities Made of Forged Ingot Niobium at Jefferson Lab text January 2022

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