Method for determining the shape and size of a knock-on tail using the Doppler-broadened γ-ray emission spectrum

Yasuko Kawamoto, Hideaki Matsuura

Research output: Contribution to journalArticle

Abstract

Analysis and experimental validation of energetic non-Maxwellian components formed in ion velocity distribution functions enhance our understanding of important physical phenomena in burning plasmas. As one such energetic component, knock-on tails appear due to nuclear elastic scattering (NES). It is important to experimentally validate the NES effects and analysis model of knock-on tails. For this purpose, we propose a method for determining the shape and size of a knock-on tail from the Doppler-broadened γ-ray emission spectrum in a proton-beam-injected deuterium plasma confined in an ITER-like experimental fusion device. In the proposed method, we adopt a two-temperature Maxwellian model and utilize the γ-ray-generating 6Li(d,nγ)7Be and 6Li(d,pγ)7Li nuclear reactions. We discuss both the validity of the proposed method and the expected accuracy of the shape and size of the measured knock-on tail.

Original languageEnglish
Pages (from-to)62-67
Number of pages6
JournalFusion Engineering and Design
Volume144
DOIs
Publication statusPublished - Jul 1 2019

Fingerprint

Elastic scattering
Combustion knock
Plasmas
Proton beams
Nuclear reactions
Deuterium
Velocity distribution
Distribution functions
Fusion reactions
Ions
Temperature

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Method for determining the shape and size of a knock-on tail using the Doppler-broadened γ-ray emission spectrum. / Kawamoto, Yasuko; Matsuura, Hideaki.

In: Fusion Engineering and Design, Vol. 144, 01.07.2019, p. 62-67.

Research output: Contribution to journalArticle

@article{239bddd438354fd7aa58e859b24602a3,
title = "Method for determining the shape and size of a knock-on tail using the Doppler-broadened γ-ray emission spectrum",
abstract = "Analysis and experimental validation of energetic non-Maxwellian components formed in ion velocity distribution functions enhance our understanding of important physical phenomena in burning plasmas. As one such energetic component, knock-on tails appear due to nuclear elastic scattering (NES). It is important to experimentally validate the NES effects and analysis model of knock-on tails. For this purpose, we propose a method for determining the shape and size of a knock-on tail from the Doppler-broadened γ-ray emission spectrum in a proton-beam-injected deuterium plasma confined in an ITER-like experimental fusion device. In the proposed method, we adopt a two-temperature Maxwellian model and utilize the γ-ray-generating 6Li(d,nγ)7Be and 6Li(d,pγ)7Li nuclear reactions. We discuss both the validity of the proposed method and the expected accuracy of the shape and size of the measured knock-on tail.",
author = "Yasuko Kawamoto and Hideaki Matsuura",
year = "2019",
month = "7",
day = "1",
doi = "10.1016/j.fusengdes.2019.04.062",
language = "English",
volume = "144",
pages = "62--67",
journal = "Fusion Engineering and Design",
issn = "0920-3796",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Method for determining the shape and size of a knock-on tail using the Doppler-broadened γ-ray emission spectrum

AU - Kawamoto, Yasuko

AU - Matsuura, Hideaki

PY - 2019/7/1

Y1 - 2019/7/1

N2 - Analysis and experimental validation of energetic non-Maxwellian components formed in ion velocity distribution functions enhance our understanding of important physical phenomena in burning plasmas. As one such energetic component, knock-on tails appear due to nuclear elastic scattering (NES). It is important to experimentally validate the NES effects and analysis model of knock-on tails. For this purpose, we propose a method for determining the shape and size of a knock-on tail from the Doppler-broadened γ-ray emission spectrum in a proton-beam-injected deuterium plasma confined in an ITER-like experimental fusion device. In the proposed method, we adopt a two-temperature Maxwellian model and utilize the γ-ray-generating 6Li(d,nγ)7Be and 6Li(d,pγ)7Li nuclear reactions. We discuss both the validity of the proposed method and the expected accuracy of the shape and size of the measured knock-on tail.

AB - Analysis and experimental validation of energetic non-Maxwellian components formed in ion velocity distribution functions enhance our understanding of important physical phenomena in burning plasmas. As one such energetic component, knock-on tails appear due to nuclear elastic scattering (NES). It is important to experimentally validate the NES effects and analysis model of knock-on tails. For this purpose, we propose a method for determining the shape and size of a knock-on tail from the Doppler-broadened γ-ray emission spectrum in a proton-beam-injected deuterium plasma confined in an ITER-like experimental fusion device. In the proposed method, we adopt a two-temperature Maxwellian model and utilize the γ-ray-generating 6Li(d,nγ)7Be and 6Li(d,pγ)7Li nuclear reactions. We discuss both the validity of the proposed method and the expected accuracy of the shape and size of the measured knock-on tail.

UR - http://www.scopus.com/inward/record.url?scp=85064614355&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064614355&partnerID=8YFLogxK

U2 - 10.1016/j.fusengdes.2019.04.062

DO - 10.1016/j.fusengdes.2019.04.062

M3 - Article

AN - SCOPUS:85064614355

VL - 144

SP - 62

EP - 67

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

SN - 0920-3796

ER -