Apparatus for monitoring X-ray beam alignment
Abstract
A self-contained, hand-held apparatus is provided for monitoring alignment of an X-ray beam in an instrument employing an X-ray source. The apparatus includes a transducer assembly containing a photoresistor for providing a range of electrical signals responsive to a range of X-ray beam intensities from the X-ray beam being aligned. A circuit, powered by a 7.5 VDC power supply and containing an audio frequency pulse generator whose frequency varies with the resistance of the photoresistor, is provided for generating a range of audible sounds. A portion of the audible range corresponds to low X-ray beam intensity. Another portion of the audible range corresponds to high X-ray beam intensity. The transducer assembly may include an a photoresistor, a thin layer of X-ray fluorescent material, and a filter layer transparent to X-rays but opaque to visible light. X-rays from the beam undergoing alignment penetrate the filter layer and excite the layer of fluorescent material. The light emitted from the fluorescent material alters the resistance of the photoresistor which is in the electrical circuit including the audio pulse generator and a speaker. In employing the apparatus, the X-ray beam is aligned to a complete alignment by adjusting the X-ray beam to produce anmore »
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7027368
- Patent Number(s):
- 5056129 A
- Application Number:
- PPN: US 7-406003
- Assignee:
- Dept. of Energy, Washington, DC (United States) PTO; EDB-94-111467
- DOE Contract Number:
- AC04-76DP03533
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 12 Sep 1989
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; MEASURING INSTRUMENTS; X-RAY SOURCES; ALIGNMENT; DESIGN; PULSE GENERATORS; TRANSDUCERS; X RADIATION; ELECTROMAGNETIC RADIATION; ELECTRONIC EQUIPMENT; EQUIPMENT; FUNCTION GENERATORS; IONIZING RADIATIONS; RADIATION SOURCES; RADIATIONS; X-RAY EQUIPMENT; 440000* - Instrumentation
Citation Formats
Steinmeyer, P.A. Apparatus for monitoring X-ray beam alignment. United States: N. p., 1991.
Web.
Steinmeyer, P.A. Apparatus for monitoring X-ray beam alignment. United States.
Steinmeyer, P.A. Tue .
"Apparatus for monitoring X-ray beam alignment". United States.
@article{osti_7027368,
title = {Apparatus for monitoring X-ray beam alignment},
author = {Steinmeyer, P.A.},
abstractNote = {A self-contained, hand-held apparatus is provided for monitoring alignment of an X-ray beam in an instrument employing an X-ray source. The apparatus includes a transducer assembly containing a photoresistor for providing a range of electrical signals responsive to a range of X-ray beam intensities from the X-ray beam being aligned. A circuit, powered by a 7.5 VDC power supply and containing an audio frequency pulse generator whose frequency varies with the resistance of the photoresistor, is provided for generating a range of audible sounds. A portion of the audible range corresponds to low X-ray beam intensity. Another portion of the audible range corresponds to high X-ray beam intensity. The transducer assembly may include an a photoresistor, a thin layer of X-ray fluorescent material, and a filter layer transparent to X-rays but opaque to visible light. X-rays from the beam undergoing alignment penetrate the filter layer and excite the layer of fluorescent material. The light emitted from the fluorescent material alters the resistance of the photoresistor which is in the electrical circuit including the audio pulse generator and a speaker. In employing the apparatus, the X-ray beam is aligned to a complete alignment by adjusting the X-ray beam to produce an audible sound of the maximum frequency. 2 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {10}
}