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Measurement of the Electrical Conductivity of He{sup 3} Plasma Induced by Neutron Irradiation

Abstract

The conductivity of a He plasma created by the inelastic reaction with thermal neutrons: {sup 3}He + n{sub th} -> {sup 3}H + p + 0.76 MeV is studied as a function of neutron flux, gas temperature and gas density. Using reported values of the electron mobility the electron density is calculated from experimental conductivity values. Further, by accepting a reasonable value for the mean energy lost in creating one ion-pair, the recombination coefficient is estimated. The measurements performed so far cover temperatures between 300 - 1600 K and densities between 0.25 - 1 times the density at atmospheric pressure and 300 K. The neutron flux is varied between 10{sup 10} - 10{sup 11} n/cm{sup 2}/s. As a sample of results achieved at 1600 K and the lowest density (corresponding to about atmospheric pressure) and the highest neutron flux the following values are obtained for the conductivity, the electron density and the recombination coefficient respectively: {sigma} 0.2 S/m, n{sub e} 6x10{sup 11}/cm{sup 3}, {alpha} = 2xl0{sup -10} cm{sup 3}/s. An extrapolation of data obtained shows that the concept of neutron induced conductivity should be attractive for MHD power generation.
Publication Date:
Mar 15, 1966
Product Type:
Technical Report
Report Number:
AE-218
Resource Relation:
Other Information: 16 refs., 1 fig., 1 tab.
Subject:
30 DIRECT ENERGY CONVERSION; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; HELIUM 3 TARGET; TRITIUM; NEUTRON REACTIONS; ELECTRIC CONDUCTIVITY; MHD GENERATORS; TEMPERATURE DEPENDENCE; NEUTRON FLUX
OSTI ID:
20949519
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0708494
Availability:
Commercial reproduction prohibited; OSTI as DE20949519
Submitting Site:
SWDN
Size:
42 pages
Announcement Date:
Dec 17, 2007

Citation Formats

Braun, J, and Nygaard, K. Measurement of the Electrical Conductivity of He{sup 3} Plasma Induced by Neutron Irradiation. Sweden: N. p., 1966. Web.
Braun, J, & Nygaard, K. Measurement of the Electrical Conductivity of He{sup 3} Plasma Induced by Neutron Irradiation. Sweden.
Braun, J, and Nygaard, K. 1966. "Measurement of the Electrical Conductivity of He{sup 3} Plasma Induced by Neutron Irradiation." Sweden.
@misc{etde_20949519,
title = {Measurement of the Electrical Conductivity of He{sup 3} Plasma Induced by Neutron Irradiation}
author = {Braun, J, and Nygaard, K}
abstractNote = {The conductivity of a He plasma created by the inelastic reaction with thermal neutrons: {sup 3}He + n{sub th} -> {sup 3}H + p + 0.76 MeV is studied as a function of neutron flux, gas temperature and gas density. Using reported values of the electron mobility the electron density is calculated from experimental conductivity values. Further, by accepting a reasonable value for the mean energy lost in creating one ion-pair, the recombination coefficient is estimated. The measurements performed so far cover temperatures between 300 - 1600 K and densities between 0.25 - 1 times the density at atmospheric pressure and 300 K. The neutron flux is varied between 10{sup 10} - 10{sup 11} n/cm{sup 2}/s. As a sample of results achieved at 1600 K and the lowest density (corresponding to about atmospheric pressure) and the highest neutron flux the following values are obtained for the conductivity, the electron density and the recombination coefficient respectively: {sigma} 0.2 S/m, n{sub e} 6x10{sup 11}/cm{sup 3}, {alpha} = 2xl0{sup -10} cm{sup 3}/s. An extrapolation of data obtained shows that the concept of neutron induced conductivity should be attractive for MHD power generation.}
place = {Sweden}
year = {1966}
month = {Mar}
}