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Title: Modified Faraday cup

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 is disclosed. 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 from 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:
372601
Patent Number(s):
5,554,926
Application Number:
PAN: 8-509,552; TRN: 96:023785
Assignee:
Univ. of California, Oakland, CA (United States)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 10 Sep 1996
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; FARADAY CUPS; DESIGN; ELECTRON BEAMS; BEAM CURRENTS; BEAM MONITORING; DATA PROCESSING; TOMOGRAPHY; DATA ACQUISITION

Citation Formats

Elmer, J W, Teruya, A T, and O`Brien, D W. Modified Faraday cup. United States: N. p., 1996. Web.
Elmer, J W, Teruya, A T, & O`Brien, D W. Modified Faraday cup. United States.
Elmer, J W, Teruya, A T, and O`Brien, D W. Tue . "Modified Faraday cup". United States.
@article{osti_372601,
title = {Modified Faraday cup},
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 is disclosed. 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 from 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 = {1996},
month = {9}
}