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.:
- Univ. of California (United States)
- OSTI Identifier:
- 372601
- Patent Number(s):
- 5554926
- 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 = {Tue Sep 10 00:00:00 EDT 1996},
month = {Tue Sep 10 00:00:00 EDT 1996}
}