Feasibility of alpha particle measurement in a magnetically confined plasma by CO/sub 2/ laser Thomson scattering
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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6112688
- Report Number(s):
- ORNL/TM-10363; ON: DE88000039
- 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
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Feasibility of alpha particle measurement by CO/sub 2/ laser Thomson scattering
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Related Subjects
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