Experiments with tungsten limiters in TEXTOR-94

V. Philipps; A. Pospieszczyk; A. Huber; A. Kirschner; J. Rapp; B. Schweer; P. Wienhold; G. Van Oost; G. Sergienko; T. Tanabe; K. Ohya; M. Wada; T. Ohgo; M. Rubel

doi:10.1016/S0022-3115(98)00385-7

Experiments with tungsten limiters in TEXTOR-94

V. Philipps, A. Pospieszczyk, A. Huber, A. Kirschner, J. Rapp, B. Schweer, P. Wienhold, G. Van Oost, G. Sergienko, T. Tanabe, K. Ohya, M. Wada, T. Ohgo, M. Rubel

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Abstract

The release of tungsten and light impurities from tungsten limiters exposed into the plasma edge of TEXTOR-94 has been measured by spectroscopic methods. Absolute effective tungsten sputtering yields are compared with model calculations on physical sputtering. The agreement is reasonable: however the observed strong decrease of tungsten release with increasing density cannot be fully explained. Erosion areas are clearly separated from carbon deposition zones. Surface analysis found neither carbon nor deuterium on the shiny metallic areas: A very sharp transition from "clean" metallic areas to carbon deposition zones within about 2-4 mm is found, instead. The carbon deposit is about 200-300 nm thick and contains deuterium with a D/C ratio of 0.05-0.1.

Original language	English
Pages (from-to)	858-864
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	258-263
Issue number	PART 1 A
DOIs	https://doi.org/10.1016/S0022-3115(98)00385-7
State	Published - Oct 1998
Externally published	Yes

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Cite this

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title = "Experiments with tungsten limiters in TEXTOR-94",

abstract = "The release of tungsten and light impurities from tungsten limiters exposed into the plasma edge of TEXTOR-94 has been measured by spectroscopic methods. Absolute effective tungsten sputtering yields are compared with model calculations on physical sputtering. The agreement is reasonable: however the observed strong decrease of tungsten release with increasing density cannot be fully explained. Erosion areas are clearly separated from carbon deposition zones. Surface analysis found neither carbon nor deuterium on the shiny metallic areas: A very sharp transition from {"}clean{"} metallic areas to carbon deposition zones within about 2-4 mm is found, instead. The carbon deposit is about 200-300 nm thick and contains deuterium with a D/C ratio of 0.05-0.1.",

author = "V. Philipps and A. Pospieszczyk and A. Huber and A. Kirschner and J. Rapp and B. Schweer and P. Wienhold and {Van Oost}, G. and G. Sergienko and T. Tanabe and K. Ohya and M. Wada and T. Ohgo and M. Rubel",

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doi = "10.1016/S0022-3115(98)00385-7",

language = "English",

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pages = "858--864",

journal = "Journal of Nuclear Materials",

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TY - JOUR

T1 - Experiments with tungsten limiters in TEXTOR-94

AU - Philipps, V.

AU - Pospieszczyk, A.

AU - Huber, A.

AU - Kirschner, A.

AU - Rapp, J.

AU - Schweer, B.

AU - Wienhold, P.

AU - Van Oost, G.

AU - Sergienko, G.

AU - Tanabe, T.

AU - Ohya, K.

AU - Wada, M.

AU - Ohgo, T.

AU - Rubel, M.

PY - 1998/10

Y1 - 1998/10

N2 - The release of tungsten and light impurities from tungsten limiters exposed into the plasma edge of TEXTOR-94 has been measured by spectroscopic methods. Absolute effective tungsten sputtering yields are compared with model calculations on physical sputtering. The agreement is reasonable: however the observed strong decrease of tungsten release with increasing density cannot be fully explained. Erosion areas are clearly separated from carbon deposition zones. Surface analysis found neither carbon nor deuterium on the shiny metallic areas: A very sharp transition from "clean" metallic areas to carbon deposition zones within about 2-4 mm is found, instead. The carbon deposit is about 200-300 nm thick and contains deuterium with a D/C ratio of 0.05-0.1.

AB - The release of tungsten and light impurities from tungsten limiters exposed into the plasma edge of TEXTOR-94 has been measured by spectroscopic methods. Absolute effective tungsten sputtering yields are compared with model calculations on physical sputtering. The agreement is reasonable: however the observed strong decrease of tungsten release with increasing density cannot be fully explained. Erosion areas are clearly separated from carbon deposition zones. Surface analysis found neither carbon nor deuterium on the shiny metallic areas: A very sharp transition from "clean" metallic areas to carbon deposition zones within about 2-4 mm is found, instead. The carbon deposit is about 200-300 nm thick and contains deuterium with a D/C ratio of 0.05-0.1.

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DO - 10.1016/S0022-3115(98)00385-7

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SP - 858

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - PART 1 A

ER -

Experiments with tungsten limiters in TEXTOR-94

Abstract

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