MARFE feedback experiments on TEXTOR-94

U. Samm; M. Brix; F. Durodié; M. Lehnen; A. Pospieszczyk; J. Rapp; G. Sergienko; B. Schweer; M. Z. Tokar; B. Unterberg

doi:10.1016/S0022-3115(98)00516-9

MARFE feedback experiments on TEXTOR-94

U. Samm, M. Brix, F. Durodié, M. Lehnen, A. Pospieszczyk, J. Rapp, G. Sergienko, B. Schweer, M. Z. Tokar, B. Unterberg

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

25 Scopus citations

Abstract

This paper reports about the latest developments on feedback control of MARFEs in TEXTOR-94. This technique allows us to avoid most of the density limit disruptions and provides means to create stationary MARFEs. The best signal for MARFE detection is the CII or CIII line radiation from the vicinity of the inner wall. This signal has been used successfully in various feedback loops acting on the deuterium gas flow, the external heating power, impurity injection or the horizontal plasma position or a combination of these. The results demonstrate that the proximity to the inner wall can be of major importance for the MARFE development, quite comparable to the average electron density or the plasma current. Recombination becomes significant inside the MARFE at electron densities of about 3×10¹⁴ cm^-3 and temperatures of a few eV as is shown by spectroscopy.

Original language	English
Pages (from-to)	666-672
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	266
DOIs	https://doi.org/10.1016/S0022-3115(98)00516-9
State	Published - Mar 2 1999
Externally published	Yes

UN SDGs

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

Access to Document

10.1016/S0022-3115(98)00516-9

Cite this

@article{a3fa88074a7f45cbbe6bd2129c779df1,

title = "MARFE feedback experiments on TEXTOR-94",

abstract = "This paper reports about the latest developments on feedback control of MARFEs in TEXTOR-94. This technique allows us to avoid most of the density limit disruptions and provides means to create stationary MARFEs. The best signal for MARFE detection is the CII or CIII line radiation from the vicinity of the inner wall. This signal has been used successfully in various feedback loops acting on the deuterium gas flow, the external heating power, impurity injection or the horizontal plasma position or a combination of these. The results demonstrate that the proximity to the inner wall can be of major importance for the MARFE development, quite comparable to the average electron density or the plasma current. Recombination becomes significant inside the MARFE at electron densities of about 3×1014 cm-3 and temperatures of a few eV as is shown by spectroscopy.",

author = "U. Samm and M. Brix and F. Durodi{\'e} and M. Lehnen and A. Pospieszczyk and J. Rapp and G. Sergienko and B. Schweer and Tokar, {M. Z.} and B. Unterberg",

year = "1999",

month = mar,

day = "2",

doi = "10.1016/S0022-3115(98)00516-9",

language = "English",

volume = "266",

pages = "666--672",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

TY - JOUR

T1 - MARFE feedback experiments on TEXTOR-94

AU - Samm, U.

AU - Brix, M.

AU - Durodié, F.

AU - Lehnen, M.

AU - Pospieszczyk, A.

AU - Rapp, J.

AU - Sergienko, G.

AU - Schweer, B.

AU - Tokar, M. Z.

AU - Unterberg, B.

PY - 1999/3/2

Y1 - 1999/3/2

N2 - This paper reports about the latest developments on feedback control of MARFEs in TEXTOR-94. This technique allows us to avoid most of the density limit disruptions and provides means to create stationary MARFEs. The best signal for MARFE detection is the CII or CIII line radiation from the vicinity of the inner wall. This signal has been used successfully in various feedback loops acting on the deuterium gas flow, the external heating power, impurity injection or the horizontal plasma position or a combination of these. The results demonstrate that the proximity to the inner wall can be of major importance for the MARFE development, quite comparable to the average electron density or the plasma current. Recombination becomes significant inside the MARFE at electron densities of about 3×1014 cm-3 and temperatures of a few eV as is shown by spectroscopy.

AB - This paper reports about the latest developments on feedback control of MARFEs in TEXTOR-94. This technique allows us to avoid most of the density limit disruptions and provides means to create stationary MARFEs. The best signal for MARFE detection is the CII or CIII line radiation from the vicinity of the inner wall. This signal has been used successfully in various feedback loops acting on the deuterium gas flow, the external heating power, impurity injection or the horizontal plasma position or a combination of these. The results demonstrate that the proximity to the inner wall can be of major importance for the MARFE development, quite comparable to the average electron density or the plasma current. Recombination becomes significant inside the MARFE at electron densities of about 3×1014 cm-3 and temperatures of a few eV as is shown by spectroscopy.

UR - http://www.scopus.com/inward/record.url?scp=0032639933&partnerID=8YFLogxK

U2 - 10.1016/S0022-3115(98)00516-9

DO - 10.1016/S0022-3115(98)00516-9

M3 - Conference article

AN - SCOPUS:0032639933

SN - 0022-3115

VL - 266

SP - 666

EP - 672

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

MARFE feedback experiments on TEXTOR-94

Abstract

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this