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Proceedings Paper

A Novel Probe For Determining The Size And Position Of A Relativistic Electron Beam
Author(s): T. J. Orzechowski; Helmut Koehler; W. Edwards; M. Nelson; B. Marshall
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Paper Abstract

In order to determine the size and position of a relativistic electron beam inside the wiggler magnetic field of a Free Electron Laser (FEL), we have developed a new probe which intercepts the electron beam on a high Z target and monitors the resulting bremsstrahlung radiation. The probe is designed to move along the entire three meters of the wiggler. 1 This FEL is designed to operate in the microwave region (2 - 8 mm) and the interaction region is an oversized waveguide with a cross section 3 cm x 9.8 cm. The axial probe moves inside this waveguide. The probe stops the electron beam on a Tantalum target and the resulting x-rays are scattered in the forward direction. A scintillator behind the beam stop reacts to the x-rays and emits visible light in the region where the x-rays strike. An array of fiber optics behind the scintillator transmits the visible light to a Reticon camera system which images the visible pattern from the scintillator. Processing the optical image is done by digitizing and storing the image and/or recording the image on video tape. Resolution and performance of this probe will be discussed.

Paper Details

Date Published: 15 October 1984
PDF: 6 pages
Proc. SPIE 0506, Fiber Optics in Adverse Environments II, (15 October 1984); doi: 10.1117/12.944901
Show Author Affiliations
T. J. Orzechowski, University of California (United States)
Helmut Koehler, University of California (United States)
W. Edwards, University of California (United States)
M. Nelson, EG&G (United States)
B. Marshall, EG&G (United States)

Published in SPIE Proceedings Vol. 0506:
Fiber Optics in Adverse Environments II
Roger A. Greenwell, Editor(s)

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