Refractive index measurement of hydrogen isotopologue mixture and applicability for homogeneity of hydrogen solid at cryogenic temperature in fusion fuel system

Zhang, Jiaqi; Iwamoto, Akifumi; Shigemori, Keisuke; Hara, Masanori; Yamanoi, Kohei

doi:https://doi.org/10.1088/1741-4326/acd015

Refractive index measurement of hydrogen isotopologue mixture and applicability for homogeneity of hydrogen solid at cryogenic temperature in fusion fuel system

Zhang, Jiaqi; Iwamoto, Akifumi; Shigemori, Keisuke et al.

Nuclear Fusion, 2023, 63(7), 076020

Number of Access:757（2025-08-15 06:45 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/92535

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Title	Refractive index measurement of hydrogen isotopologue mixture and applicability for homogeneity of hydrogen solid at cryogenic temperature in fusion fuel system
Creator	CreatorName Zhang, Jiaqi
	NRID 1000000260050 1000000260050 CreatorName Iwamoto, Akifumi
	NRID 1000050335395 1000050335395 ORCID 0000-0002-3978-8427 0000-0002-3978-8427 researchmap permalink keisuke.shigemori keisuke.shigemori Scopus Author ID 7007069209 7007069209 CreatorName Shigemori, Keisuke
	NRID 1000000334714 1000000334714 CreatorName Hara, Masanori
	NRID 1000030722813 1000030722813 ORCID 0000-0003-4492-4099 0000-0003-4492-4099 researchmap permalink yamanoi-k yamanoi-k Scopus Author ID 35243839300 35243839300 CreatorName Yamanoi, Kohei
Subject	fusion fuel
	hydrogen isotopologues
	refractive index
	tritium
Description	Zhang J., Iwamoto A., Shigemori K., et al. Refractive index measurement of hydrogen isotopologue mixture and applicability for homogeneity of hydrogen solid at cryogenic temperature in fusion fuel system. Nuclear Fusion 63, 076020 (2023); https://doi.org/10.1088/1741-4326/acd015.
Abstract	Deuterium (D)-Tritium (T) nuclear fusion reaction has potential as an energy source in the future. In both magnetic confinement and inertial confinement fusion reactors, solid D-T will generally be supplied as fusion fuel. The efficiency of the nuclear fusion reaction depends on the quality of solid D-T fuel, which is related to the composition, homogeneity, helium-3 (3He) content, and so on. However, there is no technique for in-situ examination of solid D-T fuel. In this study, we consider a simple and precise method for the characterization of solid hydrogen isotopologues at cryogenic temperature using refractive index measurement, and evaluate the distribution of hydrogen isotopologue composition and homogeneity. To evaluate without the effect of tritium decay, the homogeneity of the hydrogen (H2)-deuterium (D2) mixture is measured at first. By the in-situ refractive index measurement at cryogenic temperature, the homogeneity of solid H2-D2 mixture is roughly quantified. The phase diagram of the H2-D2 mixture shows a solid solution type. D2-rich crystal first appears from the liquid phase as a primary crystal. The composition of D2 in liquid phase ias homogeneous, whereas it reduces by obeying the liquidus line in the phase diagram with the crystallization. On the other hand, the composition of the H2-D2 mixture in solid phase is inhomogeneous because the mobility of H2 and D2 in solid phase was too slow to be homogeneous and solid. The compositions of H2-D2 mixture in liquid and solid phases could be evaluated by the in-situ refractive index measurement in time. Consequently, the refractive index measurement shows great potential as an inspection method of solid D-T fuel in fusion reactors.
Publisher	Institute of Physics
Source Title	Nuclear Fusion
Volume (Issue)	63(7)
Page	076020
Date of Issued	2023-07-01
Language	English
Handle URL	https://hdl.handle.net/11094/92535
PISSN	00295515
eISSN	17414326
NCID	AA00759871
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1088/1741-4326/acd015
Access Rights	open access
CopyRight	This article is licensed under a Creative Commons Attribution 4.0 International License.
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Nuclear Fusion. 2023, 63(7), p. 076020
DC.title	Refractive index measurement of hydrogen isotopologue mixture and applicability for homogeneity of hydrogen solid at cryogenic temperature in fusion fuel system
DC.creator	Zhang, Jiaqi
	Iwamoto, Akifumi
	Shigemori, Keisuke
	Hara, Masanori
	Yamanoi, Kohei
DC.publisher	Institute of Physics
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2023-07-01
DC.identifier	https://doi.org/10.1088/1741-4326/acd015
DC.subject	fusion fuel
	hydrogen isotopologues
	refractive index
	tritium
DC.description	Zhang J., Iwamoto A., Shigemori K., et al. Refractive index measurement of hydrogen isotopologue mixture and applicability for homogeneity of hydrogen solid at cryogenic temperature in fusion fuel system. Nuclear Fusion 63, 076020 (2023); https://doi.org/10.1088/1741-4326/acd015.
DCTERMS.abstract	Deuterium (D)-Tritium (T) nuclear fusion reaction has potential as an energy source in the future. In both magnetic confinement and inertial confinement fusion reactors, solid D-T will generally be supplied as fusion fuel. The efficiency of the nuclear fusion reaction depends on the quality of solid D-T fuel, which is related to the composition, homogeneity, helium-3 (3He) content, and so on. However, there is no technique for in-situ examination of solid D-T fuel. In this study, we consider a simple and precise method for the characterization of solid hydrogen isotopologues at cryogenic temperature using refractive index measurement, and evaluate the distribution of hydrogen isotopologue composition and homogeneity. To evaluate without the effect of tritium decay, the homogeneity of the hydrogen (H2)-deuterium (D2) mixture is measured at first. By the in-situ refractive index measurement at cryogenic temperature, the homogeneity of solid H2-D2 mixture is roughly quantified. The phase diagram of the H2-D2 mixture shows a solid solution type. D2-rich crystal first appears from the liquid phase as a primary crystal. The composition of D2 in liquid phase ias homogeneous, whereas it reduces by obeying the liquidus line in the phase diagram with the crystallization. On the other hand, the composition of the H2-D2 mixture in solid phase is inhomogeneous because the mobility of H2 and D2 in solid phase was too slow to be homogeneous and solid. The compositions of H2-D2 mixture in liquid and solid phases could be evaluated by the in-situ refractive index measurement in time. Consequently, the refractive index measurement shows great potential as an inspection method of solid D-T fuel in fusion reactors.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	92535
citation_title	Refractive index measurement of hydrogen isotopologue mixture and applicability for homogeneity of hydrogen solid at cryogenic temperature in fusion fuel system
citation_author	Zhang, Jiaqi
	Iwamoto, Akifumi
	Shigemori, Keisuke
	Hara, Masanori
	Yamanoi, Kohei
citation_publisher	Institute of Physics
citation_language	English
citation_date	2023-07-01
citation_journal_title	Nuclear Fusion
citation_volume	63
citation_issue	7
citation_firstpage	076020
citation_doi	https://doi.org/10.1088/1741-4326/acd015
citation_public_url	https://hdl.handle.net/11094/92535

Refractive index measurement of hydrogen isotopologue mixture and applicability for homogeneity of hydrogen solid at cryogenic temperature in fusion fuel system

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