skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities

Abstract

There is an on going international collaboration studying the feasibility and cost of building a muon collider or neutrino factory [1,2]. An important aspect of this study is the full understanding of ionization cooling of muons by many orders of magnitude for the collider case. An important muon ionization cooling experiment, MICE [3], has been proposed to demonstrate and validate the technology that could be used for cooling. Ionization cooling is accomplished by passing a high-emittance muon beam alternately through regions of low Z material, such as liquid hydrogen, and very high accelerating RF Cavities within a multi-Tesla solenoidal field. To determine the effect of very large solenoidal magnetic fields on the generation of dark current, x-rays and on the breakdown voltage gradients of vacuum RF cavities, a test facility has been established at Fermilab in Lab G. This facility consists of a 12 MW 805 MHz RF station and a large warm bore 5 T solenoidal superconducting magnet containing a pill box type cavity with thin removable window apertures. This system allows dark current and breakdown studies of different window configurations and materials. The results of this study will be presented. The study has shown that the peak achievablemore » accelerating gradient is reduced by a factor greater than 2 when solenoidal field of greater than 2 T are applied to the cavity.« less

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
875523
Report Number(s):
FERMILAB-CONF-04-528-AD-E
TRN: US0701219
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Conference
Resource Relation:
Conference: Presented at 22nd International Linear Accelerator Conference (LINAC 2004), Lubeck, Germany, 16-20 Aug 2004
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 43 PARTICLE ACCELERATORS; APERTURES; BREAKDOWN; CAVITIES; FERMILAB; HYDROGEN; IONIZATION; LINEAR ACCELERATORS; MAGNETIC FIELDS; MICE; MUON BEAMS; MUONS; NEUTRINOS; SUPERCONDUCTING MAGNETS; WINDOWS; Accelerators

Citation Formats

Moretti, A, Bross, A, Geer, S, Qian, Z, /Fermilab, Norem, J, /Argonne, Li, D, Zisman, M, /LBL, Berkeley, Torun, Y, /IIT, Chicago, Rimmer, R, /Jefferson Lab, Errede, D, and /Illinois U., Urbana. Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities. United States: N. p., 2005. Web.
Moretti, A, Bross, A, Geer, S, Qian, Z, /Fermilab, Norem, J, /Argonne, Li, D, Zisman, M, /LBL, Berkeley, Torun, Y, /IIT, Chicago, Rimmer, R, /Jefferson Lab, Errede, D, & /Illinois U., Urbana. Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities. United States.
Moretti, A, Bross, A, Geer, S, Qian, Z, /Fermilab, Norem, J, /Argonne, Li, D, Zisman, M, /LBL, Berkeley, Torun, Y, /IIT, Chicago, Rimmer, R, /Jefferson Lab, Errede, D, and /Illinois U., Urbana. Sat . "Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities". United States. https://www.osti.gov/servlets/purl/875523.
@article{osti_875523,
title = {Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities},
author = {Moretti, A and Bross, A and Geer, S and Qian, Z and /Fermilab and Norem, J and /Argonne and Li, D and Zisman, M and /LBL, Berkeley and Torun, Y and /IIT, Chicago and Rimmer, R and /Jefferson Lab and Errede, D and /Illinois U., Urbana},
abstractNote = {There is an on going international collaboration studying the feasibility and cost of building a muon collider or neutrino factory [1,2]. An important aspect of this study is the full understanding of ionization cooling of muons by many orders of magnitude for the collider case. An important muon ionization cooling experiment, MICE [3], has been proposed to demonstrate and validate the technology that could be used for cooling. Ionization cooling is accomplished by passing a high-emittance muon beam alternately through regions of low Z material, such as liquid hydrogen, and very high accelerating RF Cavities within a multi-Tesla solenoidal field. To determine the effect of very large solenoidal magnetic fields on the generation of dark current, x-rays and on the breakdown voltage gradients of vacuum RF cavities, a test facility has been established at Fermilab in Lab G. This facility consists of a 12 MW 805 MHz RF station and a large warm bore 5 T solenoidal superconducting magnet containing a pill box type cavity with thin removable window apertures. This system allows dark current and breakdown studies of different window configurations and materials. The results of this study will be presented. The study has shown that the peak achievable accelerating gradient is reduced by a factor greater than 2 when solenoidal field of greater than 2 T are applied to the cavity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {10}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: