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Title: Novel probe for determining the size and position of a relativistic electron beam

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. This FEL is designed to operate in the microwave region (2 to 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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA); EG and G, Inc., Goleta, CA (USA)
OSTI Identifier:
6336752
Report Number(s):
UCRL-90555; CONF-840872-30
ON: DE85001044
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: SPIE annual technical symposium, San Diego, CA, USA, 19 Aug 1984; Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 43 PARTICLE ACCELERATORS; FREE ELECTRON LASERS; BEAM MONITORS; BEAM POSITION; ELECTRON BEAMS; IMAGES; OPTICAL SYSTEMS; BEAMS; LASERS; LEPTON BEAMS; MEASURING INSTRUMENTS; MONITORS; PARTICLE BEAMS; 420300* - Engineering- Lasers- (-1989); 430200 - Particle Accelerators- Beam Dynamics, Field Calculations, & Ion Optics

Citation Formats

Orzechowski, T J, Koehler, H, Edwards, W, Nelson, M, and Marshall, B. Novel probe for determining the size and position of a relativistic electron beam. United States: N. p., 1984. Web.
Orzechowski, T J, Koehler, H, Edwards, W, Nelson, M, & Marshall, B. Novel probe for determining the size and position of a relativistic electron beam. United States.
Orzechowski, T J, Koehler, H, Edwards, W, Nelson, M, and Marshall, B. 1984. "Novel probe for determining the size and position of a relativistic electron beam". United States. https://www.osti.gov/servlets/purl/6336752.
@article{osti_6336752,
title = {Novel probe for determining the size and position of a relativistic electron beam},
author = {Orzechowski, T J and Koehler, H and Edwards, W and Nelson, M and Marshall, B},
abstractNote = {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. This FEL is designed to operate in the microwave region (2 to 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.},
doi = {},
url = {https://www.osti.gov/biblio/6336752}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jul 23 00:00:00 EDT 1984},
month = {Mon Jul 23 00:00:00 EDT 1984}
}

Conference:
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