Laboratory Investigation of Vapor Shielding for Lithium-Coated Molybdenum in Devex

Author

Jung, Soonwook ; Andruczyk, Daniel ; Ruzic, David N.

Author_Institution

Nucl., Plasma, & Radiol. Eng., Univ. of Illinois at Urbana-Champaign, Urbana, IL, USA

Volume

40

Issue

3

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

730

Lastpage

734

Abstract

To investigate the effect of lithium on a molybdenum target, a triple Langmuir probe diagnostics and target temperature measurements are carried out. Several experimental scenarios are tested to optimize the device for the vapor shielding experiment. A lithium sputtering system is used to deposit lithium on a molybdenum target. A triple Langmuir probe is placed near the target at various pressures to estimate change of plasma density and electron temperature and their effects on vapor shielding. Temperature increase at the target is measured by a thermocouple and its relationship with plasma parameters and lithium is discussed in detail.

Keywords

Langmuir probes; coatings; lithium; molybdenum; plasma density; plasma temperature; plasma-wall interactions; sputter deposition; thermocouples; Devex; Langmuir probe diagnostics; Li-Mo; electron temperature; lithium sputtering system; lithium-coated molybdenum; plasma density; plasma parameters; plasma-wall interactions; target temperature measurements; thermocouple; vapor shielding; Coils; Lithium; Plasma measurements; Plasma temperature; Probes; Temperature measurement; Lithium; molybdenum; triple langmuir probe; vapor shielding;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2011.2181980

Filename

6145702