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Title: Feasibility of alpha particle measurement in a magnetically confined plasma by CO/sub 2/ laser Thomson scattering

Abstract

Fusion-product alpha particles will dominate the behavior of the next generation of ignited D-T fusion reactors. Advanced diagnostics will be required to characterize the energy deposition of these fast alpha particles in the magnetically confined plasma. For small-angle coherent Thomson scattering of a CO/sub 2/ laser beam from such a plasma, a resonance in the scattered power occurs near 90/sup 0/ with respect to the magnetic field direction. This spatial concentration permits a simplified detection of the scattered laser power from the plasma using a heterodyne system. The signal produced by the presence of fusion-product alpha particles in an ignited plasma is calculated to be well above the noise level, which results from statistical variations of the background signal produced by scattering from free electrons. 7 refs.

Authors:
; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (USA)
OSTI Identifier:
6112688
Report Number(s):
ORNL/TM-10363
ON: DE88000039
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA DIAGNOSTICS; THOMSON SCATTERING; ALPHA DETECTION; ALPHA PARTICLES; CARBON DIOXIDE LASERS; MAGNETIC FIELD CONFIGURATIONS; PLASMA CONFINEMENT; SIGNAL-TO-NOISE RATIO; SMALL ANGLE SCATTERING; THERMONUCLEAR REACTORS; CHARGED PARTICLE DETECTION; CHARGED PARTICLES; CONFINEMENT; DETECTION; GAS LASERS; INELASTIC SCATTERING; LASERS; RADIATION DETECTION; SCATTERING; 700102* - Fusion Energy- Plasma Research- Diagnostics

Citation Formats

Richards, R. K., Vander Sluis, K. L., and Hutchinson, D. P. Feasibility of alpha particle measurement in a magnetically confined plasma by CO/sub 2/ laser Thomson scattering. United States: N. p., 1987. Web. doi:10.2172/6112688.
Richards, R. K., Vander Sluis, K. L., & Hutchinson, D. P. Feasibility of alpha particle measurement in a magnetically confined plasma by CO/sub 2/ laser Thomson scattering. United States. https://doi.org/10.2172/6112688
Richards, R. K., Vander Sluis, K. L., and Hutchinson, D. P. Sat . "Feasibility of alpha particle measurement in a magnetically confined plasma by CO/sub 2/ laser Thomson scattering". United States. https://doi.org/10.2172/6112688. https://www.osti.gov/servlets/purl/6112688.
@article{osti_6112688,
title = {Feasibility of alpha particle measurement in a magnetically confined plasma by CO/sub 2/ laser Thomson scattering},
author = {Richards, R. K. and Vander Sluis, K. L. and Hutchinson, D. P.},
abstractNote = {Fusion-product alpha particles will dominate the behavior of the next generation of ignited D-T fusion reactors. Advanced diagnostics will be required to characterize the energy deposition of these fast alpha particles in the magnetically confined plasma. For small-angle coherent Thomson scattering of a CO/sub 2/ laser beam from such a plasma, a resonance in the scattered power occurs near 90/sup 0/ with respect to the magnetic field direction. This spatial concentration permits a simplified detection of the scattered laser power from the plasma using a heterodyne system. The signal produced by the presence of fusion-product alpha particles in an ignited plasma is calculated to be well above the noise level, which results from statistical variations of the background signal produced by scattering from free electrons. 7 refs.},
doi = {10.2172/6112688},
url = {https://www.osti.gov/biblio/6112688}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {8}
}