Pellet fuelling into radiative improved confinement discharges in TEXTOR-94

J. Hobirk; A. M. Messiaen; K. H. Finken; J. Ongena; M. Brix; R. Jaspers; H. R. Koslowski; A. Krämer-Flecken; G. Mank; J. Rapp; G. Telesca; B. Unterberg

doi:10.1088/0029-5515/40/8/305

Pellet fuelling into radiative improved confinement discharges in TEXTOR-94

J. Hobirk, A. M. Messiaen, K. H. Finken, J. Ongena, M. Brix, R. Jaspers, H. R. Koslowski, A. Krämer-Flecken, G. Mank, J. Rapp, G. Telesca, B. Unterberg

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Abstract

Normally pellet injection in strongly heated discharges leads at most to a relatively short improvement of the energy and particle confinement times. In contrast to this finding, the radiative improved (RI) mode plasma of TEXTOR-94 is a very well suited target for pellet injection: the interaction of a pellet with the high density plasma together with the radiatively cooled edge leads in the best cases to an improved energy confinement time which lasts to the end of the heating phase. The pellet injection causes at first a density increase; this phase is followed by a quick partial particle loss and later an increase to a quasi-stationary value. Because of the linear density dependence of RI mode confinement this leads to an additional increase in energy confinement time.

Original language	English
Pages (from-to)	1469-1475
Number of pages	7
Journal	Nuclear Fusion
Volume	40
Issue number	8
DOIs	https://doi.org/10.1088/0029-5515/40/8/305
State	Published - Aug 2000
Externally published	Yes

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title = "Pellet fuelling into radiative improved confinement discharges in TEXTOR-94",

abstract = "Normally pellet injection in strongly heated discharges leads at most to a relatively short improvement of the energy and particle confinement times. In contrast to this finding, the radiative improved (RI) mode plasma of TEXTOR-94 is a very well suited target for pellet injection: the interaction of a pellet with the high density plasma together with the radiatively cooled edge leads in the best cases to an improved energy confinement time which lasts to the end of the heating phase. The pellet injection causes at first a density increase; this phase is followed by a quick partial particle loss and later an increase to a quasi-stationary value. Because of the linear density dependence of RI mode confinement this leads to an additional increase in energy confinement time.",

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T1 - Pellet fuelling into radiative improved confinement discharges in TEXTOR-94

AU - Hobirk, J.

AU - Messiaen, A. M.

AU - Finken, K. H.

AU - Ongena, J.

AU - Brix, M.

AU - Jaspers, R.

AU - Koslowski, H. R.

AU - Krämer-Flecken, A.

AU - Mank, G.

AU - Rapp, J.

AU - Telesca, G.

AU - Unterberg, B.

PY - 2000/8

Y1 - 2000/8

N2 - Normally pellet injection in strongly heated discharges leads at most to a relatively short improvement of the energy and particle confinement times. In contrast to this finding, the radiative improved (RI) mode plasma of TEXTOR-94 is a very well suited target for pellet injection: the interaction of a pellet with the high density plasma together with the radiatively cooled edge leads in the best cases to an improved energy confinement time which lasts to the end of the heating phase. The pellet injection causes at first a density increase; this phase is followed by a quick partial particle loss and later an increase to a quasi-stationary value. Because of the linear density dependence of RI mode confinement this leads to an additional increase in energy confinement time.

AB - Normally pellet injection in strongly heated discharges leads at most to a relatively short improvement of the energy and particle confinement times. In contrast to this finding, the radiative improved (RI) mode plasma of TEXTOR-94 is a very well suited target for pellet injection: the interaction of a pellet with the high density plasma together with the radiatively cooled edge leads in the best cases to an improved energy confinement time which lasts to the end of the heating phase. The pellet injection causes at first a density increase; this phase is followed by a quick partial particle loss and later an increase to a quasi-stationary value. Because of the linear density dependence of RI mode confinement this leads to an additional increase in energy confinement time.

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DO - 10.1088/0029-5515/40/8/305

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SN - 0029-5515

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SP - 1469

EP - 1475

JO - Nuclear Fusion

JF - Nuclear Fusion

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ER -

Pellet fuelling into radiative improved confinement discharges in TEXTOR-94

Abstract

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