Scaling of radiated power to plasma contamination for neon seeded discharges on boronized TEXTOR-94

G. Telesca; H. A. Claassen; P. Franz; A. M. Messiaen; J. Ongena; J. Rapp; U. Samm; N. Schoon; B. Schweer; M. Z. Tokar; B. Unterberg; G. Van Oost

doi:10.1016/S0022-3115(96)00619-8

Scaling of radiated power to plasma contamination for neon seeded discharges on boronized TEXTOR-94

G. Telesca, H. A. Claassen, P. Franz, A. M. Messiaen, J. Ongena, J. Rapp, U. Samm, N. Schoon, B. Schweer, M. Z. Tokar, B. Unterberg, G. Van Oost

Research output: Contribution to journal › Conference article › peer-review

7 Scopus citations

Abstract

When neon is injected into a tokamak plasma with the aim of reducing the peak heat flow into the SOL by enhanced edge radiation, both P_rad and Z_eff increase. The ratio of the incremental P_rad to the incremental Z_eff, ΔP_rad/ΔZ_eff, can change on TEXTOR from 0.1 MW to about 2 MW depending on n_e, on T_e(a) and on the transport regime. The measured ΔP_rad/ΔZ_eff is higher for I-mode auxiliary heated (higher diffusion) than for OH discharges (lower diffusion), consistent with model calculations. For I-mode discharges ΔP_rad/ΔZ_eff is a decreasing function of T_e(a) and it scales approximately as n̄_e². The I-mode regime on TEXTOR, which displays very good energy confinement scaling, can represent, for suitable conditions, a satisfactory compromise between a high τ_E and not excessive particle confinement.

Original language	English
Pages (from-to)	853-856
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	241-243
DOIs	https://doi.org/10.1016/S0022-3115(96)00619-8
State	Published - Feb 2 1997
Externally published	Yes
Event	Proceedings of the 1996 12th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Saint-Raphael, Fr Duration: May 20 1996 → May 24 1996

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@article{e50ac2c76cc149b4b5539ad8d22d3231,

title = "Scaling of radiated power to plasma contamination for neon seeded discharges on boronized TEXTOR-94",

abstract = "When neon is injected into a tokamak plasma with the aim of reducing the peak heat flow into the SOL by enhanced edge radiation, both Prad and Zeff increase. The ratio of the incremental Prad to the incremental Zeff, ΔPrad/ΔZeff, can change on TEXTOR from 0.1 MW to about 2 MW depending on ne, on Te(a) and on the transport regime. The measured ΔPrad/ΔZeff is higher for I-mode auxiliary heated (higher diffusion) than for OH discharges (lower diffusion), consistent with model calculations. For I-mode discharges ΔPrad/ΔZeff is a decreasing function of Te(a) and it scales approximately as {\=n}e2. The I-mode regime on TEXTOR, which displays very good energy confinement scaling, can represent, for suitable conditions, a satisfactory compromise between a high τE and not excessive particle confinement.",

author = "G. Telesca and Claassen, {H. A.} and P. Franz and Messiaen, {A. M.} and J. Ongena and J. Rapp and U. Samm and N. Schoon and B. Schweer and Tokar, {M. Z.} and B. Unterberg and {Van Oost}, G.",

year = "1997",

month = feb,

day = "2",

doi = "10.1016/S0022-3115(96)00619-8",

language = "English",

volume = "241-243",

pages = "853--856",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

note = "Proceedings of the 1996 12th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices ; Conference date: 20-05-1996 Through 24-05-1996",

}

TY - JOUR

T1 - Scaling of radiated power to plasma contamination for neon seeded discharges on boronized TEXTOR-94

AU - Telesca, G.

AU - Claassen, H. A.

AU - Franz, P.

AU - Messiaen, A. M.

AU - Ongena, J.

AU - Rapp, J.

AU - Samm, U.

AU - Schoon, N.

AU - Schweer, B.

AU - Tokar, M. Z.

AU - Unterberg, B.

AU - Van Oost, G.

PY - 1997/2/2

Y1 - 1997/2/2

N2 - When neon is injected into a tokamak plasma with the aim of reducing the peak heat flow into the SOL by enhanced edge radiation, both Prad and Zeff increase. The ratio of the incremental Prad to the incremental Zeff, ΔPrad/ΔZeff, can change on TEXTOR from 0.1 MW to about 2 MW depending on ne, on Te(a) and on the transport regime. The measured ΔPrad/ΔZeff is higher for I-mode auxiliary heated (higher diffusion) than for OH discharges (lower diffusion), consistent with model calculations. For I-mode discharges ΔPrad/ΔZeff is a decreasing function of Te(a) and it scales approximately as n̄e2. The I-mode regime on TEXTOR, which displays very good energy confinement scaling, can represent, for suitable conditions, a satisfactory compromise between a high τE and not excessive particle confinement.

AB - When neon is injected into a tokamak plasma with the aim of reducing the peak heat flow into the SOL by enhanced edge radiation, both Prad and Zeff increase. The ratio of the incremental Prad to the incremental Zeff, ΔPrad/ΔZeff, can change on TEXTOR from 0.1 MW to about 2 MW depending on ne, on Te(a) and on the transport regime. The measured ΔPrad/ΔZeff is higher for I-mode auxiliary heated (higher diffusion) than for OH discharges (lower diffusion), consistent with model calculations. For I-mode discharges ΔPrad/ΔZeff is a decreasing function of Te(a) and it scales approximately as n̄e2. The I-mode regime on TEXTOR, which displays very good energy confinement scaling, can represent, for suitable conditions, a satisfactory compromise between a high τE and not excessive particle confinement.

UR - http://www.scopus.com/inward/record.url?scp=0031546462&partnerID=8YFLogxK

U2 - 10.1016/S0022-3115(96)00619-8

DO - 10.1016/S0022-3115(96)00619-8

M3 - Conference article

AN - SCOPUS:0031546462

SN - 0022-3115

VL - 241-243

SP - 853

EP - 856

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

T2 - Proceedings of the 1996 12th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices

Y2 - 20 May 1996 through 24 May 1996

ER -

Scaling of radiated power to plasma contamination for neon seeded discharges on boronized TEXTOR-94

Abstract

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