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Title: Tomographic determination of the power distribution in electron beams

A tomographic technique for determining the power distribution of an electron beam using electron beam profile data acquired from a modified Faraday cup to create an image of the current density in high and low power beams. A refractory metal disk with a number of radially extending slits is placed above a Faraday cup. The beam is swept in a circular pattern so that its path crosses each slit in a perpendicular manner, thus acquiring all the data needed for a reconstruction in one circular sweep. Also, a single computer is used to generate the signals actuating the sweep, to acquire that data, and to do the reconstruction, thus reducing the time and equipment necessary to complete the process.
Inventors:
 [1];  [2]
  1. (Livermore, CA)
  2. (Pleasanton, CA)
Issue Date:
OSTI Identifier:
870733
Assignee:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5583427
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
tomographic; determination; power; distribution; electron; beams; technique; determining; beam; profile; data; acquired; modified; faraday; cup; create; image; current; density; refractory; metal; disk; radially; extending; slits; placed; swept; circular; pattern; path; crosses; slit; perpendicular; manner; acquiring; reconstruction; sweep; single; computer; generate; signals; actuating; acquire; reducing; time; equipment; complete; process; profile data; data acquired; tomographic technique; current density; refractory metal; electron beam; electron beams; radially extending; faraday cup; power distribution; beam profile; modified faraday; perpendicular manner; circular pattern; metal disk; tomographic determination; power beams; /324/250/