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Title: FEM models and Fourier decomposition of three thick septa

Abstract

Here, the CEBAF recirculating linear accelerator uses 26 septa: 8 thin, 17 thick and one Lamberston. We report here on detailed FEM models of one thick current-sheet septum, the Lambertson, and a new thick-septum concept which contains features of both. The last has higher-order field components within a factor of two of the current-sheet septum and much lower current density in the conductor were it used as a 'drop-in' replacement in CEBAF. There are accelerator layouts in which the new concept is superior to the current sheet septum in both harmonic content and current density.

Authors:
 [1]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1481850
Report Number(s):
JLAB-ACO-18-2809; DOE/OR/23177-4539; arXiv:1809.10568
Journal ID: ISSN 1748-0221
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Instrumentation
Additional Journal Information:
Journal Volume: 13; Journal Issue: 11; Journal ID: ISSN 1748-0221
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; Acceleration cavities and magnets superconducting (high-temperature superconductor; radiation hardened magnets; normal-conducting; permanent magnet devices; wigglers and undulators); Accelerator Subsystems and Technologies

Citation Formats

Benesch, J. FEM models and Fourier decomposition of three thick septa. United States: N. p., 2018. Web. doi:10.1088/1748-0221/13/11/T11001.
Benesch, J. FEM models and Fourier decomposition of three thick septa. United States. doi:10.1088/1748-0221/13/11/T11001.
Benesch, J. Mon . "FEM models and Fourier decomposition of three thick septa". United States. doi:10.1088/1748-0221/13/11/T11001.
@article{osti_1481850,
title = {FEM models and Fourier decomposition of three thick septa},
author = {Benesch, J.},
abstractNote = {Here, the CEBAF recirculating linear accelerator uses 26 septa: 8 thin, 17 thick and one Lamberston. We report here on detailed FEM models of one thick current-sheet septum, the Lambertson, and a new thick-septum concept which contains features of both. The last has higher-order field components within a factor of two of the current-sheet septum and much lower current density in the conductor were it used as a 'drop-in' replacement in CEBAF. There are accelerator layouts in which the new concept is superior to the current sheet septum in both harmonic content and current density.},
doi = {10.1088/1748-0221/13/11/T11001},
journal = {Journal of Instrumentation},
number = 11,
volume = 13,
place = {United States},
year = {Mon Nov 12 00:00:00 EST 2018},
month = {Mon Nov 12 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 12, 2019
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