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

A tomographic technique is disclosed 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 figures.
Inventors:
; ;
Issue Date:
OSTI Identifier:
6614602
Assignee:
University of California, Oakland, CA (United States) PTO; EDB-95-030833
Patent Number(s):
US 5382895; A
Application Number:
PPN: US 7-996892
Contract Number:
W-7405-ENG-48
Resource Relation:
Patent File Date: 28 Dec 1992
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM MONITORS; DESIGN; ELECTRON BEAMS; CURRENT DENSITY; BEAM OPTICS; COMPUTERIZED TOMOGRAPHY; DIGITIZERS; FARADAY CUPS; IMAGE PROCESSING; BEAMS; DIAGNOSTIC TECHNIQUES; ELECTRONIC CIRCUITS; LEPTON BEAMS; MEASURING INSTRUMENTS; MONITORS; PARTICLE BEAMS; PROCESSING; PULSE CIRCUITS; SIGNAL CONDITIONERS; TOMOGRAPHY 430300* -- Particle Accelerators-- Auxiliaries & Components

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