Control of the hydrogen:deuterium isotope mixture using pellets in JET

M. Valovič; Y. Baranov; A. Boboc; J. Buchanan; J. Citrin; E. Delabie; L. Frassinetti; J. M. Fontdecaba; L. Garzotti; C. Giroud; R. McKean; E. Lerche; V. Kiptily; F. Köchl; M. Marin; M. Maslov; S. Menmuir; G. Tvalashvili; H. Weisen

doi:10.1088/1741-4326/ab3812

Control of the hydrogen:deuterium isotope mixture using pellets in JET

M. Valovič, Y. Baranov, A. Boboc, J. Buchanan, J. Citrin, E. Delabie, L. Frassinetti, J. M. Fontdecaba, L. Garzotti, C. Giroud, R. McKean, E. Lerche, V. Kiptily, F. Köchl, M. Marin, M. Maslov, S. Menmuir, G. Tvalashvili, H. Weisen

Laboratory for Plasma Physics

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

Abstract

Deuterium pellets are injected into an initially pure hydrogen H-mode plasma in order to control the hydrogen:deuterium (H:D) isotope mixture. The pellets are deposited in the outer 20% of the minor radius, similar to that expected in ITER, creating transiently hollow electron density profiles. A H:D isotope mixture of approximately 45%:55% is obtained in the core with a pellet fuelling throughput of φ_pel = 0.045Paux/Te,ped similar to previous pellet fuelling experiments in pure deuterium. Evolution of the H:D mix in the core is reproduced using a simple model, although deuterium transport could be higher at the beginning of the pellet train compared with the flat-top phase.

Original language	English
Article number	106047
Journal	Nuclear Fusion
Volume	59
Issue number	10
DOIs	https://doi.org/10.1088/1741-4326/ab3812
Publication status	Published - 9 Sept 2019

Keywords

isotope mix control
pellet fuelling
tokamak

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10.1088/1741-4326/ab3812

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Valovič, M., Baranov, Y., Boboc, A., Buchanan, J., Citrin, J., Delabie, E., Frassinetti, L., Fontdecaba, J. M., Garzotti, L., Giroud, C., McKean, R., Lerche, E., Kiptily, V., Köchl, F., Marin, M., Maslov, M., Menmuir, S., Tvalashvili, G., & Weisen, H. (2019). Control of the hydrogen:deuterium isotope mixture using pellets in JET. Nuclear Fusion, 59(10), Article 106047. https://doi.org/10.1088/1741-4326/ab3812

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title = "Control of the hydrogen:deuterium isotope mixture using pellets in JET",

abstract = "Deuterium pellets are injected into an initially pure hydrogen H-mode plasma in order to control the hydrogen:deuterium (H:D) isotope mixture. The pellets are deposited in the outer 20% of the minor radius, similar to that expected in ITER, creating transiently hollow electron density profiles. A H:D isotope mixture of approximately 45%:55% is obtained in the core with a pellet fuelling throughput of φpel = 0.045Paux/Te,ped similar to previous pellet fuelling experiments in pure deuterium. Evolution of the H:D mix in the core is reproduced using a simple model, although deuterium transport could be higher at the beginning of the pellet train compared with the flat-top phase.",

keywords = "isotope mix control, pellet fuelling, tokamak",

author = "M. Valovi{\v c} and Y. Baranov and A. Boboc and J. Buchanan and J. Citrin and E. Delabie and L. Frassinetti and Fontdecaba, {J. M.} and L. Garzotti and C. Giroud and R. McKean and E. Lerche and V. Kiptily and F. K{\"o}chl and M. Marin and M. Maslov and S. Menmuir and G. Tvalashvili and H. Weisen",

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Valovič, M, Baranov, Y, Boboc, A, Buchanan, J, Citrin, J, Delabie, E, Frassinetti, L, Fontdecaba, JM, Garzotti, L, Giroud, C, McKean, R, Lerche, E, Kiptily, V, Köchl, F, Marin, M, Maslov, M, Menmuir, S, Tvalashvili, G & Weisen, H 2019, 'Control of the hydrogen:deuterium isotope mixture using pellets in JET', Nuclear Fusion, vol. 59, no. 10, 106047. https://doi.org/10.1088/1741-4326/ab3812

TY - JOUR

T1 - Control of the hydrogen:deuterium isotope mixture using pellets in JET

AU - Valovič, M.

AU - Baranov, Y.

AU - Boboc, A.

AU - Buchanan, J.

AU - Citrin, J.

AU - Delabie, E.

AU - Frassinetti, L.

AU - Fontdecaba, J. M.

AU - Garzotti, L.

AU - Giroud, C.

AU - McKean, R.

AU - Lerche, E.

AU - Kiptily, V.

AU - Köchl, F.

AU - Marin, M.

AU - Maslov, M.

AU - Menmuir, S.

AU - Tvalashvili, G.

AU - Weisen, H.

PY - 2019/9/9

Y1 - 2019/9/9

N2 - Deuterium pellets are injected into an initially pure hydrogen H-mode plasma in order to control the hydrogen:deuterium (H:D) isotope mixture. The pellets are deposited in the outer 20% of the minor radius, similar to that expected in ITER, creating transiently hollow electron density profiles. A H:D isotope mixture of approximately 45%:55% is obtained in the core with a pellet fuelling throughput of φpel = 0.045Paux/Te,ped similar to previous pellet fuelling experiments in pure deuterium. Evolution of the H:D mix in the core is reproduced using a simple model, although deuterium transport could be higher at the beginning of the pellet train compared with the flat-top phase.

AB - Deuterium pellets are injected into an initially pure hydrogen H-mode plasma in order to control the hydrogen:deuterium (H:D) isotope mixture. The pellets are deposited in the outer 20% of the minor radius, similar to that expected in ITER, creating transiently hollow electron density profiles. A H:D isotope mixture of approximately 45%:55% is obtained in the core with a pellet fuelling throughput of φpel = 0.045Paux/Te,ped similar to previous pellet fuelling experiments in pure deuterium. Evolution of the H:D mix in the core is reproduced using a simple model, although deuterium transport could be higher at the beginning of the pellet train compared with the flat-top phase.

KW - isotope mix control

KW - pellet fuelling

KW - tokamak

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JO - Nuclear Fusion

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ER -

Control of the hydrogen:deuterium isotope mixture using pellets in JET

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