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Title: Linear Accelerators

Abstract

In linear accelerators the particles are accelerated by either electrostatic fields or oscillating Radio Frequency (RF) fields. Accordingly the linear accelerators are divided in three large groups: electrostatic, induction and RF accelerators. Overview of the different types of accelerators is given. Stability of longitudinal and transverse motion in the RF linear accelerators is briefly discussed. The methods of beam focusing in linacs are described.

Authors:
 [1]
  1. Joint Institute for Nuclear Research, Joliot-Curie 6, Dubna (Russian Federation)
Publication Date:
OSTI Identifier:
21366925
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1204; Journal Issue: 1; Conference: 5. international summer school on nuclear physics methods and accelerators in biology and medicine, Bratislava (Slovakia), 6-15 Jul 2009; Other Information: DOI: 10.1063/1.3295681; (c) 2009 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; FOCUSING; LINEAR ACCELERATORS; RADIOTHERAPY; RADIOWAVE RADIATION; SPALLATION; SYNCHROTRONS; ACCELERATORS; CYCLIC ACCELERATORS; ELECTROMAGNETIC RADIATION; MEDICINE; NUCLEAR MEDICINE; NUCLEAR REACTIONS; RADIATIONS; RADIOLOGY; THERAPY

Citation Formats

Sidorin, Anatoly. Linear Accelerators. United States: N. p., 2010. Web. doi:10.1063/1.3295681.
Sidorin, Anatoly. Linear Accelerators. United States. doi:10.1063/1.3295681.
Sidorin, Anatoly. 2010. "Linear Accelerators". United States. doi:10.1063/1.3295681.
@article{osti_21366925,
title = {Linear Accelerators},
author = {Sidorin, Anatoly},
abstractNote = {In linear accelerators the particles are accelerated by either electrostatic fields or oscillating Radio Frequency (RF) fields. Accordingly the linear accelerators are divided in three large groups: electrostatic, induction and RF accelerators. Overview of the different types of accelerators is given. Stability of longitudinal and transverse motion in the RF linear accelerators is briefly discussed. The methods of beam focusing in linacs are described.},
doi = {10.1063/1.3295681},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1204,
place = {United States},
year = 2010,
month = 1
}
  • The perspective of accelerator developoment is set, and some of the remaining problems are indicated. Discussion is given on the 4, 25, and 40 Mev accelerators and the klystron. The machines described are not immediately useful for clinical work, but they illustrate what can be done using klystrons. Particular attention is given to the problem of pulse shortening. Progress made in determining the cause of pulse shortening up to October 1961 is given. (P.C.H.)
  • Recirculating Linear Accelerators (RLA's) provide a compact and efficient way of accelerating particle beams to medium and high energies by reusing the same linac for multiple passes. In the conventional scheme, after each pass, the different energy beams coming out of the linac are separated and directed into appropriate arcs for recirculation, with each pass requiring a separate fixed-energy arc. In this paper we present a concept of an RLA return arc based on linear combined-function magnets, in which two and potentially more consecutive passes with very different energies are transported through the same string of magnets. By adjusting themore » dipole and quadrupole components of the constituting linear combined-function magnets, the arc is designed to be achromatic and to have zero initial and final reference orbit offsets for all transported beam energies. We demonstrate the concept by developing a design for a droplet-shaped return arc for a dog-bone RLA capable of transporting two beam passes with momenta different by a factor of two. Finally, we present the results of tracking simulations of the two passes and lay out the path to end-to-end design and simulation of a complete dog-bone RLA.« less
  • Recirculating Linear Accelerators (RLA's) provide a compact and efficient way of accelerating particle beams to medium and high energies by reusing the same linac for multiple passes. In the conventional scheme, after each pass, the different energy beams coming out of the linac are separated and directed into appropriate arcs for recirculation, with each pass requiring a separate fixed-energy arc. In this paper we present a concept of an RLA return arc based on linear combined-function magnets, in which two and potentially more consecutive passes with very different energies are transported through the same string of magnets. By adjusting themore » dipole and quadrupole components of the constituting linear combined-function magnets, the arc is designed to be achromatic and to have zero initial and final reference orbit offsets for all transported beam energies. We demonstrate the concept by developing a design for a droplet-shaped return arc for a dog-bone RLA capable of transporting two beam passes with momenta different by a factor of two. Finally, we present the results of tracking simulations of the two passes and lay out the path to end-to-end design and simulation of a complete dog-bone RLA.« less