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

Yasuko Kawamoto; Hideaki Matsuura

doi:10.1016/j.fusengdes.2019.04.062

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

Yasuko Kawamoto, Hideaki Matsuura

Nuclear Energy Systems

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	62-67
Number of pages	6
Journal	Fusion Engineering and Design
Volume	144
DOIs	https://doi.org/10.1016/j.fusengdes.2019.04.062
Publication status	Published - Jul 2019

All Science Journal Classification (ASJC) codes

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

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@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",

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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",

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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

Y1 - 2019/7

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.

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