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Title: Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers

Abstract

A method for correcting magnetic field aberrations produced by eddy currents induced in a particle accelerator vacuum chamber housing is provided wherein correction windings are attached to selected positions on the housing and the windings are energized by transformer action from secondary coils, which coils are inductively coupled to the poles of electro-magnets that are powered to confine the charged particle beam within a desired orbit as the charged particles are accelerated through the vacuum chamber by a particle-driving rf field. The power inductively coupled to the secondary coils varies as a function of variations in the power supplied by the particle-accelerating rf field to a beam of particles accelerated through the vacuum chamber, so the current in the energized correction coils is effective to cancel eddy current flux fields that would otherwise be induced in the vacuum chamber by power variations in the particle beam.

Inventors:
 [1];  [2]
  1. Wading River, NY
  2. Shoreham, NY
Publication Date:
Research Org.:
Associated Universities, Inc., Upton, NY (United States)
OSTI Identifier:
875268
Patent Number(s):
US H909
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; correcting; eddy; current; magnetic; fields; particle; accelerator; vacuum; chambers; field; aberrations; produced; currents; induced; chamber; housing; provided; correction; windings; attached; selected; positions; energized; transformer; action; secondary; coils; inductively; coupled; poles; electro-magnets; powered; confine; charged; beam; desired; orbit; particles; accelerated; particle-driving; rf; power; varies; function; variations; supplied; particle-accelerating; effective; cancel; flux; otherwise; chamber housing; power supplied; particle accelerator; inductively coupled; eddy current; particle beam; vacuum chamber; charged particles; magnetic field; magnetic fields; charged particle; eddy currents; selected position; rf field; currents induced; vacuum chambers; secondary coil; correction coil; particle accelera; accelerator vacuum; correcting eddy; /315/

Citation Formats

Danby, Gordon T, and Jackson, John W. Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers. United States: N. p., 1991. Web.
Danby, Gordon T, & Jackson, John W. Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers. United States.
Danby, Gordon T, and Jackson, John W. Tue . "Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers". United States. https://www.osti.gov/servlets/purl/875268.
@article{osti_875268,
title = {Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers},
author = {Danby, Gordon T and Jackson, John W},
abstractNote = {A method for correcting magnetic field aberrations produced by eddy currents induced in a particle accelerator vacuum chamber housing is provided wherein correction windings are attached to selected positions on the housing and the windings are energized by transformer action from secondary coils, which coils are inductively coupled to the poles of electro-magnets that are powered to confine the charged particle beam within a desired orbit as the charged particles are accelerated through the vacuum chamber by a particle-driving rf field. The power inductively coupled to the secondary coils varies as a function of variations in the power supplied by the particle-accelerating rf field to a beam of particles accelerated through the vacuum chamber, so the current in the energized correction coils is effective to cancel eddy current flux fields that would otherwise be induced in the vacuum chamber by power variations in the particle beam.},
doi = {},
url = {https://www.osti.gov/biblio/875268}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {1}
}

Patent:

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