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Title: System for tomographic determination of the power distribution in electron beams

Abstract

A tomographic technique for measuring the current density distribution in electron beams 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. The modified Faraday cup includes a narrow slit and is rotated by a stepper motor and can be moved in the x, y and z directions. The beam is swept across the slit perpendicular thereto and controlled by deflection coils, and the slit rotated such that waveforms are taken every few degrees form 0{degree} to 360{degree} and the waveforms are recorded by a digitizing storage oscilloscope. Two-dimensional and three-dimensional images of the current density distribution in the beam can be reconstructed by computer tomography from this information, providing quantitative information about the beam focus and alignment. 12 figs.

Inventors:
; ;
Issue Date:
Research Org.:
University of California
OSTI Identifier:
131938
Patent Number(s):
5,468,966
Application Number:
PAN: 8-283,438; TRN: 96:004589
Assignee:
Univ. of California, Oakland, CA (United States)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 21 Nov 1995
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ELECTRON BEAMS; BEAM MONITORS; COMPUTERIZED TOMOGRAPHY; DESIGN; BEAM CURRENTS; CURRENT DENSITY; BEAM PROFILES; FARADAY CUPS; FOCUSING; BEAM MONITORING

Citation Formats

Elmer, J W, Teruya, A T, and O`Brien, D W. System for tomographic determination of the power distribution in electron beams. United States: N. p., 1995. Web.
Elmer, J W, Teruya, A T, & O`Brien, D W. System for tomographic determination of the power distribution in electron beams. United States.
Elmer, J W, Teruya, A T, and O`Brien, D W. Tue . "System for tomographic determination of the power distribution in electron beams". United States.
@article{osti_131938,
title = {System for tomographic determination of the power distribution in electron beams},
author = {Elmer, J W and Teruya, A T and O`Brien, D W},
abstractNote = {A tomographic technique for measuring the current density distribution in electron beams 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. The modified Faraday cup includes a narrow slit and is rotated by a stepper motor and can be moved in the x, y and z directions. The beam is swept across the slit perpendicular thereto and controlled by deflection coils, and the slit rotated such that waveforms are taken every few degrees form 0{degree} to 360{degree} and the waveforms are recorded by a digitizing storage oscilloscope. Two-dimensional and three-dimensional images of the current density distribution in the beam can be reconstructed by computer tomography from this information, providing quantitative information about the beam focus and alignment. 12 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {11}
}