Simultaneous H/D/T and 3He/4He absolute concentration measurements with an optical Penning gauge on JET

JET Contributors

doi:10.1016/j.fusengdes.2021.112511

Simultaneous H/D/T and ³He/⁴He absolute concentration measurements with an optical Penning gauge on JET

JET Contributors

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

27 Scopus citations

Abstract

The Optical Penning (or Species-Selective Penning) Gauge technique is used for the measurement of the H₂/D₂/T₂ fuel isotopic composition and He/D₂ concentration in the neutralized particle exhaust of fusion devices. An Optical Penning detection system has already been used in JET during its first deuterium-tritium campaigns (DTE1) and has been chosen by ITER. Recent improvements to the sub-divertor diagnostic suite as well as the optical instrumentation, in preparation for the next DT campaign, have improved the optical throughput of the measurement and enabled ³He/D₂ detection down to 0.1 %. For the first time, the ³He/⁴He isotopic ratio can be measured simultaneously with the H/D/T ratio. This technique is of particular interest for ion cyclotron resonance frequency (ICRF) heating scenarios.

Original language	English
Article number	112511
Journal	Fusion Engineering and Design
Volume	170
DOIs	https://doi.org/10.1016/j.fusengdes.2021.112511
State	Published - Sep 2021
Externally published	Yes

Funding

The authors would like to thank Dr. U. Kruezi (presently with ITER International Organization) for valuable discussion and insight on all aspects of the design of the JET sub-divertor neutral gas analysis diagnostic. Seminal contributions by Dr. M. Stamp (CCFE, retired) to the original design of all optical aspects of this upgrade are also gratefully acknowledged. This work was funded in part under US Department of Energy Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training program 2014-2018 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission

Funders	Funder number
Euratom research and training program 2014-2018	633053
U.S. Department of Energy	DE-AC05-00OR22725

Keywords

DTE2
Fusion energy
ITER
JET
Plasma diagnostic
Residual gas analysis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.fusengdes.2021.112511

Cite this

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title = "Simultaneous H/D/T and 3He/4He absolute concentration measurements with an optical Penning gauge on JET",

abstract = "The Optical Penning (or Species-Selective Penning) Gauge technique is used for the measurement of the H2/D2/T2 fuel isotopic composition and He/D2 concentration in the neutralized particle exhaust of fusion devices. An Optical Penning detection system has already been used in JET during its first deuterium-tritium campaigns (DTE1) and has been chosen by ITER. Recent improvements to the sub-divertor diagnostic suite as well as the optical instrumentation, in preparation for the next DT campaign, have improved the optical throughput of the measurement and enabled 3He/D2 detection down to 0.1 %. For the first time, the 3He/4He isotopic ratio can be measured simultaneously with the H/D/T ratio. This technique is of particular interest for ion cyclotron resonance frequency (ICRF) heating scenarios.",

keywords = "DTE2, Fusion energy, ITER, JET, Plasma diagnostic, Residual gas analysis",

author = "{JET Contributors} and S. Vartanian and E. Delabie and Klepper, {C. C.} and I. Jepu and P. Jacquet and E. Lerche and B. Lomanowski and L. Colas and C. Marcus and R. Dumond and D. Douai and A. Widdowson",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = sep,

doi = "10.1016/j.fusengdes.2021.112511",

language = "English",

volume = "170",

journal = "Fusion Engineering and Design",

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AU - JET Contributors

AU - Vartanian, S.

AU - Delabie, E.

AU - Klepper, C. C.

AU - Jepu, I.

AU - Jacquet, P.

AU - Lerche, E.

AU - Lomanowski, B.

AU - Colas, L.

AU - Marcus, C.

AU - Dumond, R.

AU - Douai, D.

AU - Widdowson, A.

PY - 2021/9

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AB - The Optical Penning (or Species-Selective Penning) Gauge technique is used for the measurement of the H2/D2/T2 fuel isotopic composition and He/D2 concentration in the neutralized particle exhaust of fusion devices. An Optical Penning detection system has already been used in JET during its first deuterium-tritium campaigns (DTE1) and has been chosen by ITER. Recent improvements to the sub-divertor diagnostic suite as well as the optical instrumentation, in preparation for the next DT campaign, have improved the optical throughput of the measurement and enabled 3He/D2 detection down to 0.1 %. For the first time, the 3He/4He isotopic ratio can be measured simultaneously with the H/D/T ratio. This technique is of particular interest for ion cyclotron resonance frequency (ICRF) heating scenarios.

KW - DTE2

KW - Fusion energy

KW - ITER

KW - JET

KW - Plasma diagnostic

KW - Residual gas analysis

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