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Title: Variable-energy collimator for high-energy radiation

Abstract

An apparatus is disclosed providing a variable aperture energy beam collimator. A plurality of beam opaque blocks are in sliding interface edge contact to form a variable aperture. The blocks may be offset at the apex angle to provide a non-equilateral aperture. A plurality of collimator block assemblies may be employed for providing a channel defining a collimated beam. Adjacent assemblies are inverted front-to-back with respect to one another for preventing noncollimated ;energy from emergine from the apparatus. An adjustment mechanism comprises a cable attached to at least one block and a hand wheel mechanism for operating the cable. The blocks are supported by guide rods engaging slide brackets on the blocks. The guide rods are pivotally connected at each end to intermediate actuators supported on rotatable shafts to change the shape of the aperture. A divergent collimated beam may be obtained by adjusting the apertures of adjacent stages to be unequal.

Inventors:
Issue Date:
OSTI Identifier:
6599222
Application Number:
ON: DE83006853
Assignee:
SNL; ERA-08-017476; EDB-83-048543
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
07 ISOTOPES AND RADIATION SOURCES; 42 ENGINEERING; RADIATION SOURCES; COLLIMATORS; APERTURES; CONTROL; OPERATION; SPECIFICATIONS; OPENINGS 070201* -- Radiation Sources-- Design, Fabrication & Operation; 420200 -- Engineering-- Facilities, Equipment, & Techniques

Citation Formats

Hill, R.A. Variable-energy collimator for high-energy radiation. United States: N. p., 1982. Web.
Hill, R.A. Variable-energy collimator for high-energy radiation. United States.
Hill, R.A. Wed . "Variable-energy collimator for high-energy radiation". United States.
@article{osti_6599222,
title = {Variable-energy collimator for high-energy radiation},
author = {Hill, R.A.},
abstractNote = {An apparatus is disclosed providing a variable aperture energy beam collimator. A plurality of beam opaque blocks are in sliding interface edge contact to form a variable aperture. The blocks may be offset at the apex angle to provide a non-equilateral aperture. A plurality of collimator block assemblies may be employed for providing a channel defining a collimated beam. Adjacent assemblies are inverted front-to-back with respect to one another for preventing noncollimated ;energy from emergine from the apparatus. An adjustment mechanism comprises a cable attached to at least one block and a hand wheel mechanism for operating the cable. The blocks are supported by guide rods engaging slide brackets on the blocks. The guide rods are pivotally connected at each end to intermediate actuators supported on rotatable shafts to change the shape of the aperture. A divergent collimated beam may be obtained by adjusting the apertures of adjacent stages to be unequal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {3}
}