Development of an optical digital ionization chamber
Abstract
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.
- Authors:
- Publication Date:
- Research Org.:
- Oak Ridge National Lab., TN (USA)
- OSTI Identifier:
- 6761807
- Report Number(s):
- CONF-881022-1
ON: DE89002209
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Conference
- 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
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 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
Citation Formats
Turner, J E, Hunter, S R, Hamm, R N, Wright, H A, Hurst, G S, and Gibson, W A. Development of an optical digital ionization chamber. United States: N. p., 1988.
Web.
Turner, J E, Hunter, S R, Hamm, R N, Wright, H A, Hurst, G S, & Gibson, W A. Development of an optical digital ionization chamber. United States.
Turner, J E, Hunter, S R, Hamm, R N, Wright, H A, Hurst, G S, and Gibson, W A. 1988.
"Development of an optical digital ionization chamber". United States. https://www.osti.gov/servlets/purl/6761807.
@article{osti_6761807,
title = {Development of an optical digital ionization chamber},
author = {Turner, J E and Hunter, S R and Hamm, R N and Wright, H A and Hurst, G S and Gibson, W A},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6761807},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1988},
month = {Fri Jan 01 00:00:00 EST 1988}
}