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.
- Inventors:
-
- Pleasanton, CA
- Livermore, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 870171
- Patent Number(s):
- 5468966
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- tomographic; determination; power; distribution; electron; beams; technique; measuring; current; density; beam; profile; data; acquired; modified; faraday; cup; create; image; narrow; slit; rotated; stepper; motor; moved; z; directions; swept; perpendicular; thereto; controlled; deflection; coils; waveforms; degrees; form; degree; 360; recorded; digitizing; storage; oscilloscope; two-dimensional; three-dimensional; images; reconstructed; computer; tomography; information; providing; quantitative; focus; alignment; perpendicular thereto; profile data; data acquired; quantitative information; tomographic technique; three-dimensional images; stepper motor; current density; electron beam; electron beams; faraday cup; density distribution; power distribution; beam profile; modified faraday; z directions; storage oscilloscope; providing quantitative; slit perpendicular; slit rotated; computer tomography; narrow slit; deflection coils; tomographic determination; beam focus; power beams; dimensional image; degrees form; digitizing storage; deflection coil; three-dimensional image; z direction; dimensional images; /250/324/
Citation Formats
Elmer, John W, Teruya, Alan T, and O'Brien, Dennis W. System for tomographic determination of the power distribution in electron beams. United States: N. p., 1995.
Web.
Elmer, John W, Teruya, Alan T, & O'Brien, Dennis W. System for tomographic determination of the power distribution in electron beams. United States.
Elmer, John W, Teruya, Alan T, and O'Brien, Dennis W. Sun .
"System for tomographic determination of the power distribution in electron beams". United States. https://www.osti.gov/servlets/purl/870171.
@article{osti_870171,
title = {System for tomographic determination of the power distribution in electron beams},
author = {Elmer, John W and Teruya, Alan T and O'Brien, Dennis 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1995},
month = {Sun Jan 01 00:00:00 EST 1995}
}
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