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Title: Nuclear diagnostic for fast alpha particles

Abstract

Measurement of the velocity distribution of confined energetic alpha particles resulting from deuterium-tritium fusion reactions in a magnetically contained plasma is provided. The fusion plasma is seeded with energetic boron neutrals for producing, by means of the reaction .sup.10 B (.alpha.,n) .sup.13 N reaction, radioactive nitrogen nuclei which are then collected by a probe. The radioactivity of the probe is then measured by conventional techniques in determining the energy distribution of the alpha particles in the plasma. In a preferred embodiment, diborane gas (B.sub.2 H.sub.6) is the source of the boron neutrals to produce .sup.13 N which decays almost exclusively by positron emission with a convenient half-life of 10 minutes.

Inventors:
 [1];  [2];  [3]
  1. Lawrence Township, Mercer County, NJ
  2. (Belle Mead, NJ)
  3. Pacific Palisades, CA
Issue Date:
Research Org.:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ
OSTI Identifier:
875249
Patent Number(s):
H75
Assignee:
United States of America as respresented by United States (Washington, DC)
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nuclear; diagnostic; fast; alpha; particles; measurement; velocity; distribution; confined; energetic; resulting; deuterium-tritium; fusion; reactions; magnetically; contained; plasma; provided; seeded; boron; neutrals; producing; means; reaction; 10; 13; radioactive; nitrogen; nuclei; collected; probe; radioactivity; measured; conventional; techniques; determining; energy; preferred; embodiment; diborane; gas; source; produce; decays; exclusively; positron; emission; convenient; half-life; minutes; preferred embodiment; energy distribution; positron emission; alpha particle; alpha particles; conventional techniques; fusion reaction; velocity distribution; energetic alpha; fusion reactions; fusion plasma; contained plasma; /376/

Citation Formats

Grisham, Larry R, Post, Jr., Douglass E., and Dawson, John M. Nuclear diagnostic for fast alpha particles. United States: N. p., 1986. Web.
Grisham, Larry R, Post, Jr., Douglass E., & Dawson, John M. Nuclear diagnostic for fast alpha particles. United States.
Grisham, Larry R, Post, Jr., Douglass E., and Dawson, John M. Wed . "Nuclear diagnostic for fast alpha particles". United States. https://www.osti.gov/servlets/purl/875249.
@article{osti_875249,
title = {Nuclear diagnostic for fast alpha particles},
author = {Grisham, Larry R and Post, Jr., Douglass E. and Dawson, John M},
abstractNote = {Measurement of the velocity distribution of confined energetic alpha particles resulting from deuterium-tritium fusion reactions in a magnetically contained plasma is provided. The fusion plasma is seeded with energetic boron neutrals for producing, by means of the reaction .sup.10 B (.alpha.,n) .sup.13 N reaction, radioactive nitrogen nuclei which are then collected by a probe. The radioactivity of the probe is then measured by conventional techniques in determining the energy distribution of the alpha particles in the plasma. In a preferred embodiment, diborane gas (B.sub.2 H.sub.6) is the source of the boron neutrals to produce .sup.13 N which decays almost exclusively by positron emission with a convenient half-life of 10 minutes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

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