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Title: RFQ device for accelerating particles

A superconducting radio frequency quadrupole (RFQ) device includes four spaced elongated, linear, tubular rods disposed parallel to a charged particle beam axis, with each rod supported by two spaced tubular posts oriented radially with respect to the beam axis. The rod and post geometry of the device has four-fold rotation symmetry, lowers the frequency of the quadrupole mode below that of the dipole mode, and provides large dipole-quadrupole mode isolation to accommodate a range of mechanical tolerances. The simplicity of the geometry of the structure, which can be formed by joining eight simple T-sections, provides a high degree of mechanical stability, is insensitive to mechanical displacement, and is particularly adapted for fabrication with superconducting materials such as niobium.
Inventors:
 [1];  [2]
  1. (Park Ridge, IL)
  2. (Naperville, IL)
Issue Date:
OSTI Identifier:
869920
Assignee:
University of Chicago (Chicago, IL) ANL
Patent Number(s):
US 5422549
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
rfq; device; accelerating; particles; superconducting; radio; frequency; quadrupole; spaced; elongated; linear; tubular; rods; disposed; parallel; charged; particle; beam; axis; rod; supported; posts; oriented; radially; respect; post; geometry; four-fold; rotation; symmetry; lowers; mode; below; dipole; provides; dipole-quadrupole; isolation; accommodate; range; mechanical; tolerances; simplicity; structure; formed; joining; eight; simple; t-sections; degree; stability; insensitive; displacement; particularly; adapted; fabrication; materials; niobium; rod support; disposed parallel; conducting material; particularly adapted; radio frequency; particle beam; charged particle; superconducting material; superconducting materials; mechanical stability; beam axis; frequency quadrupole; rods disposed; rod supported; quadrupole mode; mechanical displacement; superconducting radio; /315/