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Title: Innovative compact braze-free accelerating cavity

Abstract

We report that high energy physics experiments using particle accelerators as well as industrial and medical applications are continuously seeking more compact, robust and cheaper accelerating structures. As of today, stable operating gradients, exceeding 100 MV/m, have been demonstrated by the SLAC group in the X-Band (11.424 GHz). These experiments show that hard structures, fabricated without high-temperature processes, achieve a better high gradient performance in terms of accelerating gradients. Therefore, we present an innovative and compact type of accelerating cavity that avoids any high-temperature processes like brazing or diffusion bonding. All cells are joined together by means of specifically designed and proprietary screws which ensure good vacuum and RF contacts. Two three-cell standing-wave accelerating structures, designed to operate in the pi-mode at 11.424 GHz, have been successfully built and cold tested. In order to guarantee a vacuum envelope and mechanically robust assembly, we used the Electron Beam Welding (EBW) and the Tungsten Inert Gas (TIG) processes. Lastly, this work has been carried out in the framework of a funded project by the Vth Committee of the INFN for the Laboratori Nazionali di Frascati (LNF), within a large international collaboration between LNF, SLAC and KEK for the development of X-Band acceleratingmore » cavities using "hard structure" technology.« less

Authors:
 [1];  [2];  [3];  [4]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. INFN - Milano (Italy)
  3. INFN - Laboratori Nazionali di Frascati, Roma (Italy)
  4. Comeb srl, Via dei Ranuncoli snc, Roma (Italy)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1475418
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Instrumentation
Additional Journal Information:
Journal Volume: 13; Journal Issue: 09; Journal ID: ISSN 1748-0221
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Accelerator Applications; Accelerator Subsystems and Technologies

Citation Formats

Dolgashev, V. A., Faillace, L., Spataro, B., and Bonifazi, R. Innovative compact braze-free accelerating cavity. United States: N. p., 2018. Web. doi:10.1088/1748-0221/13/09/p09017.
Dolgashev, V. A., Faillace, L., Spataro, B., & Bonifazi, R. Innovative compact braze-free accelerating cavity. United States. doi:10.1088/1748-0221/13/09/p09017.
Dolgashev, V. A., Faillace, L., Spataro, B., and Bonifazi, R. Wed . "Innovative compact braze-free accelerating cavity". United States. doi:10.1088/1748-0221/13/09/p09017. https://www.osti.gov/servlets/purl/1475418.
@article{osti_1475418,
title = {Innovative compact braze-free accelerating cavity},
author = {Dolgashev, V. A. and Faillace, L. and Spataro, B. and Bonifazi, R.},
abstractNote = {We report that high energy physics experiments using particle accelerators as well as industrial and medical applications are continuously seeking more compact, robust and cheaper accelerating structures. As of today, stable operating gradients, exceeding 100 MV/m, have been demonstrated by the SLAC group in the X-Band (11.424 GHz). These experiments show that hard structures, fabricated without high-temperature processes, achieve a better high gradient performance in terms of accelerating gradients. Therefore, we present an innovative and compact type of accelerating cavity that avoids any high-temperature processes like brazing or diffusion bonding. All cells are joined together by means of specifically designed and proprietary screws which ensure good vacuum and RF contacts. Two three-cell standing-wave accelerating structures, designed to operate in the pi-mode at 11.424 GHz, have been successfully built and cold tested. In order to guarantee a vacuum envelope and mechanically robust assembly, we used the Electron Beam Welding (EBW) and the Tungsten Inert Gas (TIG) processes. Lastly, this work has been carried out in the framework of a funded project by the Vth Committee of the INFN for the Laboratori Nazionali di Frascati (LNF), within a large international collaboration between LNF, SLAC and KEK for the development of X-Band accelerating cavities using "hard structure" technology.},
doi = {10.1088/1748-0221/13/09/p09017},
journal = {Journal of Instrumentation},
number = 09,
volume = 13,
place = {United States},
year = {2018},
month = {9}
}

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