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Title: Beam loading compensation of traveling wave linacs through the time dependence of the rf drive

Abstract

Beam loading in traveling-wave linear accelerating structures leads to unacceptable spread of particle energies across an extended train of bunched particles due to beam-induced field and dispersion. Methods for modulating the rf power driving linacs are effective at reducing energy spread, but for general linacs do not have a clear analytic foundation. We report here methods for calculating how to modulate the rf drive in arbitrarily nonuniform traveling-wave linacs within the convective-transport (power-diffusion) model that results in no additional energy spread due to beam loading (but not dispersion). Varying group velocity, loss factor, and cell quality factor within a structure, and nonzero particle velocity, are handled.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1041608
Report Number(s):
BNL-96771-2012-JA
39KC02000; TRN: US1202686
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
American Physical Society
Additional Journal Information:
Journal Volume: 14; Journal Issue: 9
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; LINEAR ACCELERATORS; QUALITY FACTOR; RF SYSTEMS; TIME DEPENDENCE; TRAVELLING WAVES; VELOCITY; klystron; convective; adaptively; national synchrotron light source

Citation Formats

Towne N., and Rose J. Beam loading compensation of traveling wave linacs through the time dependence of the rf drive. United States: N. p., 2011. Web. doi:10.1103/PhysRevSTAB.14.090402.
Towne N., & Rose J. Beam loading compensation of traveling wave linacs through the time dependence of the rf drive. United States. doi:10.1103/PhysRevSTAB.14.090402.
Towne N., and Rose J. Fri . "Beam loading compensation of traveling wave linacs through the time dependence of the rf drive". United States. doi:10.1103/PhysRevSTAB.14.090402.
@article{osti_1041608,
title = {Beam loading compensation of traveling wave linacs through the time dependence of the rf drive},
author = {Towne N. and Rose J.},
abstractNote = {Beam loading in traveling-wave linear accelerating structures leads to unacceptable spread of particle energies across an extended train of bunched particles due to beam-induced field and dispersion. Methods for modulating the rf power driving linacs are effective at reducing energy spread, but for general linacs do not have a clear analytic foundation. We report here methods for calculating how to modulate the rf drive in arbitrarily nonuniform traveling-wave linacs within the convective-transport (power-diffusion) model that results in no additional energy spread due to beam loading (but not dispersion). Varying group velocity, loss factor, and cell quality factor within a structure, and nonzero particle velocity, are handled.},
doi = {10.1103/PhysRevSTAB.14.090402},
journal = {American Physical Society},
number = 9,
volume = 14,
place = {United States},
year = {2011},
month = {9}
}