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Title: Materials erosion and redeposition studies at the PISCES-facility: net erosion under redeposition

Abstract

Simultaneous erosion and redeposition of copper and 304 stainless steel under controlled and continuous plasma (D,He,Ar) bombardment has been investigated in the PISCES-facility, which generates typical edge-plasma conditions of magnetic fusion devices. The plasma bombardment conditions are: incident ion flux in the range from 10/sup 17/ to 10/sup 18/ ions/sec/cm/sup 2/, ion bombarding energy of 100 eV, electron temperature in the range from 5 to 15 eV, plasma density in the range from 10/sup 11/ to 10/sup 13/ cm/sup -3/, target temperature in the range from 300 to 900K, and the total ion fluence in the range from 10/sup 20/ to 10/sup 22/ ions/cm/sup 2/. The net erosion yield under redeposition is found to be significantly smaller than the classical sputtering yield data. A first-order modeling is attempted to interpret the erosion and redeposition behavior of materials under plasma bombardment. It is pointed out both theoretically and experimentally that the mean free path for electron impact ionization of the sputtered material is the key parameter to control the overall mechanism of erosion and redeposition. Strongly modified surface morphologies of bombarded targets are observed and indicate a retrapping effect.

Authors:
; ; ; ;
Publication Date:
Research Org.:
California Univ., Los Angeles (USA). Dept. of Mechanical, Aerospace and Nuclear Engineering
OSTI Identifier:
5569379
Report Number(s):
UCLA/PPG-980; CONF-860421-49
ON: DE86010867
DOE Contract Number:  
AS03-84ER52104
Resource Type:
Conference
Resource Relation:
Conference: 2. international conference on fusion reactor materials (ICFRM-2), Chicago, IL, USA, 13 Apr 1986; Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COPPER; EROSION; FIRST WALL; STAINLESS STEEL-304; INTERACTIONS; IRRADIATION; PLASMA; PLASMA SHEATH; ALLOYS; CHROMIUM ALLOYS; CHROMIUM STEELS; CHROMIUM-NICKEL STEELS; CORROSION RESISTANT ALLOYS; ELEMENTS; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; METALS; NICKEL ALLOYS; STAINLESS STEELS; STEELS; THERMONUCLEAR REACTOR WALLS; TRANSITION ELEMENTS; 700209* - Fusion Power Plant Technology- Component Development & Materials Testing

Citation Formats

Hirooka, Y, Goebel, D M, Conn, R W, Leung, W K, and Campbell, G A. Materials erosion and redeposition studies at the PISCES-facility: net erosion under redeposition. United States: N. p., 1986. Web.
Hirooka, Y, Goebel, D M, Conn, R W, Leung, W K, & Campbell, G A. Materials erosion and redeposition studies at the PISCES-facility: net erosion under redeposition. United States.
Hirooka, Y, Goebel, D M, Conn, R W, Leung, W K, and Campbell, G A. 1986. "Materials erosion and redeposition studies at the PISCES-facility: net erosion under redeposition". United States. https://www.osti.gov/servlets/purl/5569379.
@article{osti_5569379,
title = {Materials erosion and redeposition studies at the PISCES-facility: net erosion under redeposition},
author = {Hirooka, Y and Goebel, D M and Conn, R W and Leung, W K and Campbell, G A},
abstractNote = {Simultaneous erosion and redeposition of copper and 304 stainless steel under controlled and continuous plasma (D,He,Ar) bombardment has been investigated in the PISCES-facility, which generates typical edge-plasma conditions of magnetic fusion devices. The plasma bombardment conditions are: incident ion flux in the range from 10/sup 17/ to 10/sup 18/ ions/sec/cm/sup 2/, ion bombarding energy of 100 eV, electron temperature in the range from 5 to 15 eV, plasma density in the range from 10/sup 11/ to 10/sup 13/ cm/sup -3/, target temperature in the range from 300 to 900K, and the total ion fluence in the range from 10/sup 20/ to 10/sup 22/ ions/cm/sup 2/. The net erosion yield under redeposition is found to be significantly smaller than the classical sputtering yield data. A first-order modeling is attempted to interpret the erosion and redeposition behavior of materials under plasma bombardment. It is pointed out both theoretically and experimentally that the mean free path for electron impact ionization of the sputtered material is the key parameter to control the overall mechanism of erosion and redeposition. Strongly modified surface morphologies of bombarded targets are observed and indicate a retrapping effect.},
doi = {},
url = {https://www.osti.gov/biblio/5569379}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {5}
}

Conference:
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