Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-02-01

Journal: JOURNAL OF NUCLEAR MATERIALS

Included Journals: Scopus、EI、SCIE

Volume: 433

Issue: 1-3

Page Number: 80-85

ISSN: 0022-3115

Abstract: Tungsten has become an important material in fusion reactors and plasma-facing components. Laser ablation of tungsten has been carried out at 1064 nm, 532 nm, and 355 nm at atmospheric pressure to determine the capability of laser-induced breakdown spectroscopy (LIBS) for in situ diagnosis of plasma-facing components. Stark broadening and Boltzmann plots were used for the measurement of electron density and temperature, respectively of laser produced tungsten plasma. At a constant laser irradiance (1.05 x 10(15) W m(-2)) the maximum temperature (16,304 K) was reached at 1064 nm. Maximum electron density (1.12 x 10(18) cm(-3)) was observed at 355 nm. Variations in electron temperature and density as a function of laser irradiance and time are also discussed. This work could provide important reference data for the design and optimization of LIBS systems involved in plasma-facing components diagnostics. (c) 2012 Elsevier B.V. All rights reserved.