System for tomographic determination of the power distribution in electron beams

Patent · 17 January 1995

OSTI ID:6614602

Elmer, J W; Teruya, A T; O'Brien, D W

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.

• DOE Contract Number: W-7405-ENG-48
• Assignee: University of California, Oakland, CA (United States)
• Patent Number(s): A; US 5382895
• Application Number: PPN: US 7-996892
• OSTI ID: 6614602
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430300* -- Particle Accelerators-- Auxiliaries & Components
BEAM MONITORS
BEAM OPTICS
BEAMS
COMPUTERIZED TOMOGRAPHY
CURRENT DENSITY
DESIGN
DIAGNOSTIC TECHNIQUES
DIGITIZERS
ELECTRON BEAMS
ELECTRONIC CIRCUITS
FARADAY CUPS
IMAGE PROCESSING
LEPTON BEAMS
MEASURING INSTRUMENTS
MONITORS
PARTICLE BEAMS
PROCESSING
PULSE CIRCUITS
SIGNAL CONDITIONERS
TOMOGRAPHY