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Title: Gas mixtures for gas-filled particle detectors

Abstract

Improved binary and tertiary gas mixtures for gas-filled particle detectors are provided. The components are chosen on the basis of the principle that the first component is one gas or mixture of two gases having a large electron scattering cross section at energies of about 0.5 eV and higher, and the second component is a gas (Ar) having a very small cross section at and below aout 0.5 eV, whereby fast electrons in the gaseous mixture are slowed into the energy range of about 0.5 eV where the cross section for the mixture is small and hence the electron mean free path is large. The reduction in both the cross section and the electron energy results in an increase in the drift velocity of the electrons in the gas mixtures over that for the separate components for a range of E/P (pressure-reduced electron field) values. Several gas mixtures are provided that provide faster response in gas-filled detectors for convenient E/P ranges as compared with conventional gas mixtures.

Inventors:
 [1];  [2];  [2];  [1]
  1. (Oak Ridge, TN)
  2. (Knoxville, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
863573
Patent Number(s):
4201692
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
gas; mixtures; gas-filled; particle; detectors; improved; binary; tertiary; provided; components; chosen; basis; principle; component; mixture; gases; electron; scattering; section; energies; below; aout; whereby; fast; electrons; gaseous; slowed; energy; range; hence; mean; free; path; reduction; results; increase; drift; velocity; separate; pressure-reduced; field; values; provide; faster; response; convenient; ranges; compared; conventional; separate components; particle detectors; electron energy; free path; mean free; gas mixtures; gaseous mixture; gas mixture; particle detector; energy range; drift velocity; conventional gas; improved binary; gas-filled particle; separate component; /252/250/

Citation Formats

Christophorou, Loucas G., McCorkle, Dennis L., Maxey, David V., and Carter, James G. Gas mixtures for gas-filled particle detectors. United States: N. p., 1980. Web.
Christophorou, Loucas G., McCorkle, Dennis L., Maxey, David V., & Carter, James G. Gas mixtures for gas-filled particle detectors. United States.
Christophorou, Loucas G., McCorkle, Dennis L., Maxey, David V., and Carter, James G. Tue . "Gas mixtures for gas-filled particle detectors". United States. https://www.osti.gov/servlets/purl/863573.
@article{osti_863573,
title = {Gas mixtures for gas-filled particle detectors},
author = {Christophorou, Loucas G. and McCorkle, Dennis L. and Maxey, David V. and Carter, James G.},
abstractNote = {Improved binary and tertiary gas mixtures for gas-filled particle detectors are provided. The components are chosen on the basis of the principle that the first component is one gas or mixture of two gases having a large electron scattering cross section at energies of about 0.5 eV and higher, and the second component is a gas (Ar) having a very small cross section at and below aout 0.5 eV, whereby fast electrons in the gaseous mixture are slowed into the energy range of about 0.5 eV where the cross section for the mixture is small and hence the electron mean free path is large. The reduction in both the cross section and the electron energy results in an increase in the drift velocity of the electrons in the gas mixtures over that for the separate components for a range of E/P (pressure-reduced electron field) values. Several gas mixtures are provided that provide faster response in gas-filled detectors for convenient E/P ranges as compared with conventional gas mixtures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Patent:

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