Position sensitive proportional counter of high resolution with delay line read out to measure the surface distribution of ionizing radiation
This invention provides a high-resolution, position-sensitive, proportional-counter for ionizing radiation emanating from a surface source of ionizing radiation. There is provided a counting chamber means having an open entrance window on one side of and spaced from the source of ionizing radiation, and an anode counting wire on the other side of the open entrance window. Also, there is provided a counter wall cathode, having a delay line read-out opposite to the entrance window and spaced from the anode. A means, including several orifices for flushing a counting gas through the counting chamber means and out of the open entrance window between the source and the open entrance window, produces a stabilizing counting gas layer that does not mix with the surrounding air. This prevents the sample from being completely surrounding air. This prevents the sample from being completely enclosed so as to be charged up electrostatically. An electronic means is connected to the delay line for providing the read out of the desired high-resolution, position-sensitive, proportional-counter information corresponding to the ionizing radiation emanating from outside the open entrance window.
- Assignee:
- EDB-84-140731
- Patent Number(s):
- US 4431921
- OSTI ID:
- 6676771
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
APERTURES
DELAY CIRCUITS
DESIGN
ELECTRODES
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ELECTROSTATIC CHARGE ELIMINATORS
EQUIPMENT
FLUIDS
GASES
IONIZING RADIATIONS
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
OPENINGS
POSITION SENSITIVE DETECTORS
PROPORTIONAL COUNTERS
RADIATION DETECTORS
RADIATIONS
RESOLUTION
STABILIZATION