Low energy helium implantation in evaporated nickel surfaces

Conference · Tue Dec 31 23:00:00 EST 1991

OSTI ID:7284767

Nygren, R E; Doyle, B L; Walsh, D S ^[1]; Ottenberger, W ^[2]; Brooks, J N; Krauss, A ^[3]

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1. Sandia National Labs., Albuquerque, NM (United States)
2. Max-Planck Inst. for Plasma Physics, Garching (Germany)
3. Argonne National Lab., IL (United States)

This paper reports data on helium (He) implantation at low energy (100--200eV) in nickel (Ni) that support a concept for He self-pumping in tokamaks, and specifically an experiment in TEXTOR. These data indicate trapping saturates at about 4 {times} 10{sup 19} He/m{sup 2} areal density for He implanted at 100 eV He in Ni at 500{degrees}C. Neither prior implantation of deuterium (D) nor D bombardment of Ni surfaces already containing implanted He significantly changed the He saturation value. A model for trapping capacity and these data were used to predict He self pumping in TEXTOR.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7284767
• Report Number(s): SAND-92-0370C; CONF-920311--23; ON: DE92019297
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
665300 -- Interactions Between Beams & Condensed Matter-- (1992-)
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700480* -- Fusion Technology-- Component Development
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGED PARTICLES
CIRCULATING SYSTEMS
CLOSED PLASMA DEVICES
DEUTERIUM IONS
ELEMENTS
HELIUM IONS
ION IMPLANTATION
IONS
LIMITERS
MAGNETIC FIELDS
METALS
Ma
Materials Studies-- (1992-)
NICKEL
SELF-PUMPING SYSTEMS
TEXTOR TOKAMAK
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSITION ELEMENTS
TRAPPING