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Deflection system for charged-particle beam

Patent:

Abstract

A system is described for achromatically deflecting a beam of charged particles without producing net divergence of the beam comprising three successive magnetic deflection means which deflect the beam alternately in opposite directions; the first and second deflect by angles of less than 50/sup 0/ and the third by an angle of at least 90/sup 0/. Particles with different respective energies are transversely spaced as they enter the third deflection means, but emerge completely superimposed in both position and direction and may be brought to a focus in each of two mutually perpendicular planes, a short distance thereafter. Such a system may be particularly compact, especially in the direction in which the beam leaves the system. It is suitable for deflecting a beam of electrons from a linear accelerator so producing a vertical beam of electron (or with an X-ray target, of X-rays) which can be rotated about a horizontal patient for radiation therapy.
Authors:
Publication Date:
Jan 13, 1982
Product Type:
Patent
Report Number:
GB 2079035; A
Reference Number:
AIX-13-705888; EDB-83-010123
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 62 RADIOLOGY AND NUCLEAR MEDICINE; BEAM TRANSPORT; SPECIFICATIONS; RADIOTHERAPY; BEAM BENDING MAGNETS; BEAM EMITTANCE; FOCUSING; X-RAY EQUIPMENT; ELECTRICAL EQUIPMENT; ELECTROMAGNETS; EQUIPMENT; MAGNETS; MEDICINE; NUCLEAR MEDICINE; RADIOLOGY; THERAPY; 640301* - Atomic, Molecular & Chemical Physics- Beams & their Reactions; 550603 - Medicine- External Radiation in Therapy- (1980-)
OSTI ID:
6695822
Country of Origin:
United Kingdom
Language:
English
Submitting Site:
INIS
Size:
Pages: 6
Announcement Date:

Patent:

Citation Formats

Bates, T. Deflection system for charged-particle beam. United Kingdom: N. p., 1982. Web.
Bates, T. Deflection system for charged-particle beam. United Kingdom.
Bates, T. 1982. "Deflection system for charged-particle beam." United Kingdom.
@misc{etde_6695822,
title = {Deflection system for charged-particle beam}
author = {Bates, T}
abstractNote = {A system is described for achromatically deflecting a beam of charged particles without producing net divergence of the beam comprising three successive magnetic deflection means which deflect the beam alternately in opposite directions; the first and second deflect by angles of less than 50/sup 0/ and the third by an angle of at least 90/sup 0/. Particles with different respective energies are transversely spaced as they enter the third deflection means, but emerge completely superimposed in both position and direction and may be brought to a focus in each of two mutually perpendicular planes, a short distance thereafter. Such a system may be particularly compact, especially in the direction in which the beam leaves the system. It is suitable for deflecting a beam of electrons from a linear accelerator so producing a vertical beam of electron (or with an X-ray target, of X-rays) which can be rotated about a horizontal patient for radiation therapy.}
place = {United Kingdom}
year = {1982}
month = {Jan}
}