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Title: Measurement of fast minority /sub 3/He/sup + +/ energy distribution during ICRF heating

Abstract

A method and means for measuring the fast /sub 3/He/sup + +/ distribution during /sub 3/He/sup + +/ minority Ion Cyclotron Resonance Frequency (ICRF) heating is disclosed. The present invention involves the use of 10 to 100 keV beams of neutral helium atoms to neutralize the fast /sub 3/He/sup + +/ ions in a heated plasma by double charge exchange (/sub 3/He/sup + +/ + /sub 4/He/sup 0/ ..-->.. /sub 3/He/sup 0/ + /sub 4/He/sup + +/). The neutralized fast /sub 3/He/sup 0/ atoms then escape from the hot plasma confined by a magnetic field and are detected by conventional neutral particle analyzing means. This technique permits the effectiveness of the coupling of the ion cyclotron waves to the /sub 3/He/sup + +/ minority ions to be accurately measured. The present invention is particularly adapted for use in evaluating the effectiveness of the intermediate coupling between the RF heating and the /sub 3/He/sup + +/ in an energetic toroidal plasma.

Inventors:
; ;
OSTI Identifier:
5265185
Application Number:
ON: DE84005935
Assignee:
EDB-84-039351
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ICR HEATING; ENERGY TRANSFER; CHARGE EXCHANGE; COUPLING; DISTRIBUTION; HELIUM IONS; HOT PLASMA; CHARGED PARTICLES; HEATING; HIGH-FREQUENCY HEATING; IONS; PLASMA; PLASMA HEATING; 700101* - Fusion Energy- Plasma Research- Confinement, Heating, & Production

Citation Formats

Post, Jr, D E, Grisham, L R, and Medley, S S. Measurement of fast minority /sub 3/He/sup + +/ energy distribution during ICRF heating. United States: N. p., Web.
Post, Jr, D E, Grisham, L R, & Medley, S S. Measurement of fast minority /sub 3/He/sup + +/ energy distribution during ICRF heating. United States.
Post, Jr, D E, Grisham, L R, and Medley, S S. . "Measurement of fast minority /sub 3/He/sup + +/ energy distribution during ICRF heating". United States.
@article{osti_5265185,
title = {Measurement of fast minority /sub 3/He/sup + +/ energy distribution during ICRF heating},
author = {Post, Jr, D E and Grisham, L R and Medley, S S},
abstractNote = {A method and means for measuring the fast /sub 3/He/sup + +/ distribution during /sub 3/He/sup + +/ minority Ion Cyclotron Resonance Frequency (ICRF) heating is disclosed. The present invention involves the use of 10 to 100 keV beams of neutral helium atoms to neutralize the fast /sub 3/He/sup + +/ ions in a heated plasma by double charge exchange (/sub 3/He/sup + +/ + /sub 4/He/sup 0/ ..-->.. /sub 3/He/sup 0/ + /sub 4/He/sup + +/). The neutralized fast /sub 3/He/sup 0/ atoms then escape from the hot plasma confined by a magnetic field and are detected by conventional neutral particle analyzing means. This technique permits the effectiveness of the coupling of the ion cyclotron waves to the /sub 3/He/sup + +/ minority ions to be accurately measured. The present invention is particularly adapted for use in evaluating the effectiveness of the intermediate coupling between the RF heating and the /sub 3/He/sup + +/ in an energetic toroidal plasma.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {},
month = {}
}