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Title: Effect of accelerating gap geometry on the beam breakup instability in linear induction accelerators

Abstract

The electron beam in a linear induction accelerator is generally susceptible to growth of the transverse beam breakup instability. In this paper we analyze a new technique for reducing the transverse coupling between the beam and the accelerating cavities, thereby reducing beam breakup growth. The basic idea is that the most worrisome cavity modes can be cutoff by a short section of coaxial transmission line inserted between the cavity structure and the accelerating gap region. We have used the three-dimensional simulation code S-smcapsO-smcapsS-smcaps to analyze this problem. In brief, we find that the technique works, provided that the lowest TE mode cutoff frequency in the coaxial line is greater than the frequency of the most worrisome TM mode of the accelerating cavity.

Authors:
; ; ;
Publication Date:
Research Org.:
Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185
OSTI Identifier:
5677066
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Appl. Phys.; (United States); Journal Volume: 63:4
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ELECTRON BEAMS; BEAM OPTICS; COMPUTERIZED SIMULATION; INSTABILITY; LINEAR ACCELERATORS; INDUCTION; S CODES; ACCELERATORS; BEAMS; COMPUTER CODES; LEPTON BEAMS; PARTICLE BEAMS; SIMULATION; 430200* - Particle Accelerators- Beam Dynamics, Field Calculations, & Ion Optics

Citation Formats

Miller, R.B., Marder, B.M., Coleman, P.D., and Clark, R.E. Effect of accelerating gap geometry on the beam breakup instability in linear induction accelerators. United States: N. p., 1988. Web. doi:10.1063/1.341136.
Miller, R.B., Marder, B.M., Coleman, P.D., & Clark, R.E. Effect of accelerating gap geometry on the beam breakup instability in linear induction accelerators. United States. doi:10.1063/1.341136.
Miller, R.B., Marder, B.M., Coleman, P.D., and Clark, R.E. Mon . "Effect of accelerating gap geometry on the beam breakup instability in linear induction accelerators". United States. doi:10.1063/1.341136.
@article{osti_5677066,
title = {Effect of accelerating gap geometry on the beam breakup instability in linear induction accelerators},
author = {Miller, R.B. and Marder, B.M. and Coleman, P.D. and Clark, R.E.},
abstractNote = {The electron beam in a linear induction accelerator is generally susceptible to growth of the transverse beam breakup instability. In this paper we analyze a new technique for reducing the transverse coupling between the beam and the accelerating cavities, thereby reducing beam breakup growth. The basic idea is that the most worrisome cavity modes can be cutoff by a short section of coaxial transmission line inserted between the cavity structure and the accelerating gap region. We have used the three-dimensional simulation code S-smcapsO-smcapsS-smcaps to analyze this problem. In brief, we find that the technique works, provided that the lowest TE mode cutoff frequency in the coaxial line is greater than the frequency of the most worrisome TM mode of the accelerating cavity.},
doi = {10.1063/1.341136},
journal = {J. Appl. Phys.; (United States)},
number = ,
volume = 63:4,
place = {United States},
year = {Mon Feb 15 00:00:00 EST 1988},
month = {Mon Feb 15 00:00:00 EST 1988}
}