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Title: High-gradient normal-conducting RF structures for muon cooling channels

Abstract

We present a status report on the research and development of high-gradient normal-conducting RF structures for the ionization cooling of muons in a neutrino factory or muon collider. High-gradient RF structures are required in regions enclosed in strong focusing solenoidal magnets, precluding the application of superconducting RF technology [1]. We propose using linear accelerating structures, with individual cells electromagnetically isolated, to achieve the required gradients of over 15 MV/m at 201 MHz and 30 MV/m at 805 MHz. Each cell will be powered independently, and cell length and drive phase adjusted to optimize shunt impedance of the assembled structure. This efficient design allows for relatively small field enhancement on the structure walls, and an accelerating field approximately 1.7 times greater than the peak surface field. The electromagnetic boundary of each cell may be provided by a thin Be sheet, or an assembly of thin-walled metal tubes. Use of thin, low-Z materials will allow passage of the muon beams without significant deterioration in beam quality due to scattering. R and D in design and analysis of robust structures that will operate under large electric and magnetic fields and RF current heating are discussed, including the experimental program based in a high-powermore » test laboratory developed for this purpose.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab., CA (US)
Sponsoring Org.:
USDOE Director, Office of Science. Office of High Energy and Nuclear Physics. Division of High Energy Physics (US)
OSTI Identifier:
783877
Report Number(s):
LBNL-48198
R&D Project: 4590MC; TRN: US0104100
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: Particle Accelerator Conference 2001, Chicago, IL (US), 06/18/2001--06/22/2001; Other Information: PBD: 12 Jun 2001
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; IONIZATION; MAGNETS; MUON BEAMS; NEUTRINOS; COOLING SYSTEMS; RF SYSTEMS; DESIGN; LINEAR COLLIDERS; STORAGE RINGS; RADIOFREQUENCY MUON

Citation Formats

Corlett, J N, Green, M A, Hartman, N, Ladran, A, Li, D, MacGill, R, Rimmer, R, Moretti, A, Jurgens, T, Holtkamp, N, Black, E, Summers, D, and Booke, M. High-gradient normal-conducting RF structures for muon cooling channels. United States: N. p., 2001. Web.
Corlett, J N, Green, M A, Hartman, N, Ladran, A, Li, D, MacGill, R, Rimmer, R, Moretti, A, Jurgens, T, Holtkamp, N, Black, E, Summers, D, & Booke, M. High-gradient normal-conducting RF structures for muon cooling channels. United States.
Corlett, J N, Green, M A, Hartman, N, Ladran, A, Li, D, MacGill, R, Rimmer, R, Moretti, A, Jurgens, T, Holtkamp, N, Black, E, Summers, D, and Booke, M. Tue . "High-gradient normal-conducting RF structures for muon cooling channels". United States. https://www.osti.gov/servlets/purl/783877.
@article{osti_783877,
title = {High-gradient normal-conducting RF structures for muon cooling channels},
author = {Corlett, J N and Green, M A and Hartman, N and Ladran, A and Li, D and MacGill, R and Rimmer, R and Moretti, A and Jurgens, T and Holtkamp, N and Black, E and Summers, D and Booke, M},
abstractNote = {We present a status report on the research and development of high-gradient normal-conducting RF structures for the ionization cooling of muons in a neutrino factory or muon collider. High-gradient RF structures are required in regions enclosed in strong focusing solenoidal magnets, precluding the application of superconducting RF technology [1]. We propose using linear accelerating structures, with individual cells electromagnetically isolated, to achieve the required gradients of over 15 MV/m at 201 MHz and 30 MV/m at 805 MHz. Each cell will be powered independently, and cell length and drive phase adjusted to optimize shunt impedance of the assembled structure. This efficient design allows for relatively small field enhancement on the structure walls, and an accelerating field approximately 1.7 times greater than the peak surface field. The electromagnetic boundary of each cell may be provided by a thin Be sheet, or an assembly of thin-walled metal tubes. Use of thin, low-Z materials will allow passage of the muon beams without significant deterioration in beam quality due to scattering. R and D in design and analysis of robust structures that will operate under large electric and magnetic fields and RF current heating are discussed, including the experimental program based in a high-power test laboratory developed for this purpose.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {6}
}

Conference:
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