First results of laser-induced desorption - quadrupole mass spectrometry (LID-QMS) at JET

M. Zlobinski; G. Sergienko; I. Jepu; C. Rowley; A. Widdowson; R. Ellis; D. Kos; I. Coffey; M. Fortune; D. Kinna; Antti Hakola; Jari Likonen; et al.; JET Contributors; EUROfusion Tokamak Exploitation Team

doi:10.1088/1741-4326/ad52a5

First results of laser-induced desorption - quadrupole mass spectrometry (LID-QMS) at JET

M. Zlobinski^*, G. Sergienko, I. Jepu, C. Rowley, A. Widdowson, R. Ellis, D. Kos, I. Coffey, M. Fortune, D. Kinna, Antti Hakola, Jari Likonen, et al., JET Contributors, EUROfusion Tokamak Exploitation Team

^*Corresponding author for this work

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

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Abstract

The paper reports the first demonstration of in situ laser-induced desorption — quadrupole mass spectrometry (LID-QMS) application on a large scale fusion device performed in summer 2023. LID-QMS allows direct measurements of the fuel inventory of plasma facing components without retrieving them from the fusion device. The diagnostic desorbs the retained gases by heating a 3 mm diameter spot on the wall using a 1 ms long laser pulse and detects them by QMS. Thus, it can measure the gas content at any wall position accessible to the laser. The successful LID-QMS application in laboratory scale and on medium size fusion devices has now been demonstrated on the larger scale and it is already foreseen as tritium monitor diagnostic in ITER. This in situ diagnostic gives direct access to retention physics on a short timescale instead of campaign-integrated measurements and can assess the space-resolvedefficacy of detritation methods. LID-QMS can be applied on many materials: on Be deposits like in JET, B deposits like in TEXTOR, C based materials or on bulk-W.

Original language	English
Article number	086031
Number of pages	9
Journal	Nuclear Fusion
Volume	64
Issue number	8
DOIs	https://doi.org/10.1088/1741-4326/ad52a5
Publication status	Published - 2024
MoE publication type	A1 Journal article-refereed

Funding

This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No. 101052200\u2014EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. The authors want to thank UKAEA for funding and D. Scoon and Ch. Linsmeier for administrative and financial support. Many thanks to A. Aleksa, P. Blatchford P. Brown, F. Chaudry, N. Cowley, P. Doyle, E. Elmushraf, S. Griph, C. Hogben, K. Ho, A. Horton, P. Iwanczak, E. Johnson, S. Johnson, A. Kantor, G. Kneale, U. Knoche, E. Mann, M. Maslov, J. Matthews, K. Meke, R. Morgan, D. Nicolai, C. Norman, I. Pearson, C. Quaterman, C. Rose, M. Sayer, L. Steel, W. Studholme, F. Weitz, S. Whethem, J. Williams, D. Wood for scientific, administrative, engineering and technical advice and support.

Keywords

beryllium
desorption
deuterium
fuel retention
JET
laser
tritium

UN SDGs

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

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Zlobinski, M., Sergienko, G., Jepu, I., Rowley, C., Widdowson, A., Ellis, R., Kos, D., Coffey, I., Fortune, M., Kinna, D., Hakola, A., Likonen, J., et al., JET Contributors, & EUROfusion Tokamak Exploitation Team (2024). First results of laser-induced desorption - quadrupole mass spectrometry (LID-QMS) at JET. Nuclear Fusion, 64(8), Article 086031. https://doi.org/10.1088/1741-4326/ad52a5

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title = "First results of laser-induced desorption - quadrupole mass spectrometry (LID-QMS) at JET",

abstract = "The paper reports the first demonstration of in situ laser-induced desorption — quadrupole mass spectrometry (LID-QMS) application on a large scale fusion device performed in summer 2023. LID-QMS allows direct measurements of the fuel inventory of plasma facing components without retrieving them from the fusion device. The diagnostic desorbs the retained gases by heating a 3 mm diameter spot on the wall using a 1 ms long laser pulse and detects them by QMS. Thus, it can measure the gas content at any wall position accessible to the laser. The successful LID-QMS application in laboratory scale and on medium size fusion devices has now been demonstrated on the larger scale and it is already foreseen as tritium monitor diagnostic in ITER. This in situ diagnostic gives direct access to retention physics on a short timescale instead of campaign-integrated measurements and can assess the space-resolvedefficacy of detritation methods. LID-QMS can be applied on many materials: on Be deposits like in JET, B deposits like in TEXTOR, C based materials or on bulk-W.",

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author = "M. Zlobinski and G. Sergienko and I. Jepu and C. Rowley and A. Widdowson and R. Ellis and D. Kos and I. Coffey and M. Fortune and D. Kinna and M. Beldishevski and A. Krimmer and Lambertz, {H. T.} and A. Terra and A. Huber and S. Brezinsek and T. Dittmar and M. Flebbe and R. Yi and R. Rayaprolu and J. Figueiredo and P. Blatchford and S. Silburn and E. Tsitrone and E. Joffrin and K. Krieger and Y. Corre and Antti Hakola and Jari Likonen and {et al.} and {JET Contributors} and {EUROfusion Tokamak Exploitation Team}",

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Zlobinski, M, Sergienko, G, Jepu, I, Rowley, C, Widdowson, A, Ellis, R, Kos, D, Coffey, I, Fortune, M, Kinna, D, Hakola, A , Likonen, J, et al., JET Contributors & EUROfusion Tokamak Exploitation Team 2024, 'First results of laser-induced desorption - quadrupole mass spectrometry (LID-QMS) at JET', Nuclear Fusion, vol. 64, no. 8, 086031. https://doi.org/10.1088/1741-4326/ad52a5

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AU - Zlobinski, M.

AU - Sergienko, G.

AU - Jepu, I.

AU - Rowley, C.

AU - Widdowson, A.

AU - Ellis, R.

AU - Kos, D.

AU - Coffey, I.

AU - Fortune, M.

AU - Kinna, D.

AU - Beldishevski, M.

AU - Krimmer, A.

AU - Lambertz, H. T.

AU - Terra, A.

AU - Huber, A.

AU - Brezinsek, S.

AU - Dittmar, T.

AU - Flebbe, M.

AU - Yi, R.

AU - Rayaprolu, R.

AU - Figueiredo, J.

AU - Blatchford, P.

AU - Silburn, S.

AU - Tsitrone, E.

AU - Joffrin, E.

AU - Krieger, K.

AU - Corre, Y.

AU - Hakola, Antti

AU - Likonen, Jari

AU - et al.

AU - JET Contributors

AU - EUROfusion Tokamak Exploitation Team

PY - 2024

Y1 - 2024

N2 - The paper reports the first demonstration of in situ laser-induced desorption — quadrupole mass spectrometry (LID-QMS) application on a large scale fusion device performed in summer 2023. LID-QMS allows direct measurements of the fuel inventory of plasma facing components without retrieving them from the fusion device. The diagnostic desorbs the retained gases by heating a 3 mm diameter spot on the wall using a 1 ms long laser pulse and detects them by QMS. Thus, it can measure the gas content at any wall position accessible to the laser. The successful LID-QMS application in laboratory scale and on medium size fusion devices has now been demonstrated on the larger scale and it is already foreseen as tritium monitor diagnostic in ITER. This in situ diagnostic gives direct access to retention physics on a short timescale instead of campaign-integrated measurements and can assess the space-resolvedefficacy of detritation methods. LID-QMS can be applied on many materials: on Be deposits like in JET, B deposits like in TEXTOR, C based materials or on bulk-W.

AB - The paper reports the first demonstration of in situ laser-induced desorption — quadrupole mass spectrometry (LID-QMS) application on a large scale fusion device performed in summer 2023. LID-QMS allows direct measurements of the fuel inventory of plasma facing components without retrieving them from the fusion device. The diagnostic desorbs the retained gases by heating a 3 mm diameter spot on the wall using a 1 ms long laser pulse and detects them by QMS. Thus, it can measure the gas content at any wall position accessible to the laser. The successful LID-QMS application in laboratory scale and on medium size fusion devices has now been demonstrated on the larger scale and it is already foreseen as tritium monitor diagnostic in ITER. This in situ diagnostic gives direct access to retention physics on a short timescale instead of campaign-integrated measurements and can assess the space-resolvedefficacy of detritation methods. LID-QMS can be applied on many materials: on Be deposits like in JET, B deposits like in TEXTOR, C based materials or on bulk-W.

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KW - desorption

KW - deuterium

KW - fuel retention

KW - JET

KW - laser

KW - tritium

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U2 - 10.1088/1741-4326/ad52a5

DO - 10.1088/1741-4326/ad52a5

M3 - Article

AN - SCOPUS:85197860623

SN - 0029-5515

VL - 64

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 086031

ER -

First results of laser-induced desorption - quadrupole mass spectrometry (LID-QMS) at JET

Abstract

Funding

Keywords

UN SDGs

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