Article Dans Une Revue Nuclear Fusion Année : 2024

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

I. Jepu
C. Rowley
A. Widdowson
R. Ellis
D. Kos
I. Coffey
M. Fortune
D. Kinna
M. Beldishevski
J. Figueiredo
P. Blatchford
S. Silburn
A. Hakola
J. Likonen

Résumé

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-resolved
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Dates et versions

cea-04816621 , version 1 (03-12-2024)

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M. Zlobinski, G. Sergienko, I. Jepu, C. Rowley, A. Widdowson, et al.. First results of laser-induced desorption - quadrupole mass spectrometry (LID-QMS) at JET. Nuclear Fusion, 2024, 64 (8), pp.086031. ⟨10.1088/1741-4326/ad52a5⟩. ⟨cea-04816621⟩
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