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 »
- Authors:
-
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- INFN - Milano (Italy)
- INFN - Laboratori Nazionali di Frascati, Roma (Italy)
- Comeb srl, Via dei Ranuncoli snc, Roma (Italy)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), 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. https://doi.org/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. https://doi.org/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 = {Wed Sep 19 00:00:00 EDT 2018},
month = {Wed Sep 19 00:00:00 EDT 2018}
}
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Figures / Tables:
Figure 1: Solid model, one-half of the braze-free 3-cell cavity: 1. High-gradient cells, RF vacuum chamber; 2. Special screws for clamping; 3. Input RF flange 4. secondary vacuum chamber; 5. Vacuum flange for the secondary vacuum chamber; 6. Downstream vacuum flange; 7. Water cooling pipe.
Works referenced in this record:
New local field quantity describing the high gradient limit of accelerating structures
journal, October 2009
- Grudiev, A.; Calatroni, S.; Wuensch, W.
- Physical Review Special Topics - Accelerators and Beams, Vol. 12, Issue 10
rf breakdown measurements in electron beam driven 200 GHz copper and copper-silver accelerating structures
journal, November 2016
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- Physical Review Accelerators and Beams, Vol. 19, Issue 11
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- Physical Review Accelerators and Beams, Vol. 19, Issue 1
Design of the Compact Linear Collider main linac accelerating structure made from two halves
journal, April 2017
- Zha, Hao; Grudiev, Alexej
- Physical Review Accelerators and Beams, Vol. 20, Issue 4
Works referencing / citing this record:
The Ka-band high power klystron amplifier design program of INFN
journal, September 2021
- Behtouei, M.; Spataro, B.; Di Paolo, F.
- Vacuum, Vol. 191
A SW Ka-Band Linearizer Structure with Minimum Surface Electric Field for the Compact Light XLS Project
text, January 2020
- Behtouei, Mostafa; Faillace, Luigi; Spataro, Bruno
- arXiv
Figures / Tables found in this record: