Development of an optical digital ionization chamber
We are developing a new device for optically detecting and imaging the track of a charged particle in a gas. The electrons in the particle track are made to oscillate rapidly by the application of an external, short-duration, high-voltage, RF electric field. The excited electrons produce additional ionization and electronic excitation of the gas molecules in their immediate vicinity, leading to copious light emission (fluorescence) from the selected gas, allowing the location of the electrons along the track to be determined. Two digital cameras simultaneously scan the emitted light across two perpendicular planes outside the chamber containing gas. The information thus obtained for a given track can be used to infer relevant quantities for microdosimetry and dosimetry, e.g., energy deposited, LET, and track structure in the gas. The design of such a device now being constructed and methods of obtaining the dosimetric data from the digital output will be described. 4 refs., 4 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6761807
- Report Number(s):
- CONF-881022-1; ON: DE89002209
- Resource Relation:
- Conference: Workshop on implementation of dose equivalent meters based on microdosimetric techniques in radiation protection, Schloss Elmau, F.R. Germany, 18 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DOSEMETERS
DESIGN
PARTICLE TRACKS
FLUORESCENCE
CHARGED PARTICLE DETECTION
DOSIMETRY
ELECTRO-OPTICAL EFFECTS
LET
RADIATION DETECTION
DETECTION
ENERGY TRANSFER
LUMINESCENCE
MEASURING INSTRUMENTS
440104* - Radiation Instrumentation- High Energy Physics Instrumentation