Variable aperture 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 emerging 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:
-
- Albuquerque, NM
- Issue Date:
- Research Org.:
- AT&T
- OSTI Identifier:
- 865019
- Patent Number(s):
- 4450578
- Application Number:
- 06/354,552
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
- DOE Contract Number:
- AC04-76DPOO789
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- variable; aperture; collimator; energy; radiation; apparatus; disclosed; providing; beam; plurality; opaque; blocks; sliding; interface; edge; contact; form; offset; apex; angle; provide; non-equilateral; block; assemblies; employed; channel; defining; collimated; adjacent; inverted; front-to-back; respect; preventing; noncollimated; emerging; adjustment; mechanism; comprises; cable; attached; hand; wheel; operating; supported; guide; rods; engaging; slide; brackets; pivotally; connected; intermediate; actuators; rotatable; shafts; change; shape; divergent; obtained; adjusting; apertures; stages; unequal; energy beam; rotatable shaft; energy radiation; variable aperture; pivotally connected; collimated beam; mechanism comprises; adjustment mechanism; guide rods; closed providing; interface edge; /378/976/
Citation Formats
Hill, Ronald A. Variable aperture collimator for high energy radiation. United States: N. p., 1984.
Web.
Hill, Ronald A. Variable aperture collimator for high energy radiation. United States.
Hill, Ronald A. Tue .
"Variable aperture collimator for high energy radiation". United States. https://www.osti.gov/servlets/purl/865019.
@article{osti_865019,
title = {Variable aperture collimator for high energy radiation},
author = {Hill, Ronald 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 emerging 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 = {Tue May 22 00:00:00 EDT 1984},
month = {Tue May 22 00:00:00 EDT 1984}
}