Atomic and ionic hydrogen flux probe for quantitative in-situ monitoring of hydrogen recycling

A. Kuzmin; K. Miura; M. Kobayashi; K. Hanada; K. Fujii; T. Shikama; M. Hasuo; H. Zushi

doi:10.1016/j.fusengdes.2023.113462

Atomic and ionic hydrogen flux probe for quantitative in-situ monitoring of hydrogen recycling

A. Kuzmin
, K. Miura
, M. Kobayashi
, K. Hanada
, K. Fujii
, T. Shikama
, M. Hasuo
, H. Zushi

Diagnostics and Control

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

Abstract

A new combination diagnostic as a hydrogen recycling monitor in harsh conditions is proposed. Combining permeation membrane probe with a Langmuir probe provides a possibility to measure both atomic and ionic hydrogen fluxes to plasma facing components. A brief overview of permeation probes is given. The range of measurable H fluxes is from 10¹⁶ to more than 10²⁰ Hm⁻²s⁻¹. Time response of the permeation probe is ∼0.1−0.5 s. A method to address disadvantages of permeation probes is proposed. This includes an introduction of a preparation chamber for Ar-plasma cleaning of the membrane and absolute calibration with a visible spectroscopy. The hydrogen recombination coefficient, evaluated in such calibration, is k_u=5.9×10⁻³⁰m⁴s⁻¹, which agrees well with previous research.

Original language	English
Article number	113462
Journal	Fusion Engineering and Design
Volume	189
DOIs	https://doi.org/10.1016/j.fusengdes.2023.113462
State	Published - Apr 2023

Funding

This work has been financially supported by the NIFS Collaboration Research Program, Japan ( NIFS13KUTR087 , NIFS22KUTR173 ). The authors are grateful for the support of QUEST team.

Keywords

Atomic hydrogen
Hydrogen
PdCu
Permeation
Steady state tokamak operation

Access to Document

10.1016/j.fusengdes.2023.113462

Cite this

@article{7d4dbc24c6174af0a63236429b95f65f,

title = "Atomic and ionic hydrogen flux probe for quantitative in-situ monitoring of hydrogen recycling",

abstract = "A new combination diagnostic as a hydrogen recycling monitor in harsh conditions is proposed. Combining permeation membrane probe with a Langmuir probe provides a possibility to measure both atomic and ionic hydrogen fluxes to plasma facing components. A brief overview of permeation probes is given. The range of measurable H fluxes is from 1016 to more than 1020 Hm−2s−1. Time response of the permeation probe is ∼0.1−0.5 s. A method to address disadvantages of permeation probes is proposed. This includes an introduction of a preparation chamber for Ar-plasma cleaning of the membrane and absolute calibration with a visible spectroscopy. The hydrogen recombination coefficient, evaluated in such calibration, is ku=5.9×10−30m4s−1, which agrees well with previous research.",

keywords = "Atomic hydrogen, Hydrogen, PdCu, Permeation, Steady state tokamak operation",

author = "A. Kuzmin and K. Miura and M. Kobayashi and K. Hanada and K. Fujii and T. Shikama and M. Hasuo and H. Zushi",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = apr,

doi = "10.1016/j.fusengdes.2023.113462",

language = "English",

volume = "189",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier",

}

TY - JOUR

T1 - Atomic and ionic hydrogen flux probe for quantitative in-situ monitoring of hydrogen recycling

AU - Kuzmin, A.

AU - Miura, K.

AU - Kobayashi, M.

AU - Hanada, K.

AU - Fujii, K.

AU - Shikama, T.

AU - Hasuo, M.

AU - Zushi, H.

PY - 2023/4

Y1 - 2023/4

N2 - A new combination diagnostic as a hydrogen recycling monitor in harsh conditions is proposed. Combining permeation membrane probe with a Langmuir probe provides a possibility to measure both atomic and ionic hydrogen fluxes to plasma facing components. A brief overview of permeation probes is given. The range of measurable H fluxes is from 1016 to more than 1020 Hm−2s−1. Time response of the permeation probe is ∼0.1−0.5 s. A method to address disadvantages of permeation probes is proposed. This includes an introduction of a preparation chamber for Ar-plasma cleaning of the membrane and absolute calibration with a visible spectroscopy. The hydrogen recombination coefficient, evaluated in such calibration, is ku=5.9×10−30m4s−1, which agrees well with previous research.

AB - A new combination diagnostic as a hydrogen recycling monitor in harsh conditions is proposed. Combining permeation membrane probe with a Langmuir probe provides a possibility to measure both atomic and ionic hydrogen fluxes to plasma facing components. A brief overview of permeation probes is given. The range of measurable H fluxes is from 1016 to more than 1020 Hm−2s−1. Time response of the permeation probe is ∼0.1−0.5 s. A method to address disadvantages of permeation probes is proposed. This includes an introduction of a preparation chamber for Ar-plasma cleaning of the membrane and absolute calibration with a visible spectroscopy. The hydrogen recombination coefficient, evaluated in such calibration, is ku=5.9×10−30m4s−1, which agrees well with previous research.

KW - Atomic hydrogen

KW - Hydrogen

KW - PdCu

KW - Permeation

KW - Steady state tokamak operation

UR - https://www.scopus.com/pages/publications/85146420342

U2 - 10.1016/j.fusengdes.2023.113462

DO - 10.1016/j.fusengdes.2023.113462

M3 - Article

AN - SCOPUS:85146420342

SN - 0920-3796

VL - 189

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

M1 - 113462

ER -

Atomic and ionic hydrogen flux probe for quantitative in-situ monitoring of hydrogen recycling

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this