Spectroscopic characterization and imaging of laser- and unipolar arc-induced plasmas

TitleSpectroscopic characterization and imaging of laser- and unipolar arc-induced plasmas
Publication TypeJournal Article
Year of Publication2014
AuthorsD.UB Aussems, D. Nishijima, C. Brandt, R.P Doerner, N.J. Lopes Cardozo
JournalJournal of Applied Physics
Volume116
Issue6
Pagination063301
Abstract

Tungsten plasmas induced by unipolar arcs were investigated using optical emission spectroscopy and imaging, and compared with laser-induced tungsten plasmas. The unipolar arcs were initiated in the linear-plasma simulator PISCES-A at UCSD under fusion relevant conditions. The electron temperature and density of the unipolar arc plasmas were in the range 0.5-0.7 eV and 0.7-2.0 x 10(20) m(-3), respectively, and increased with increasing negative bias voltage, but did not correlate with the surface temperature. In comparison, the electron temperature and density of the laser-induced plasmas were in the range 0.6-1.4 eV and 7 x 10(19)-1 x 10(22) m(-3), respectively.

DOI10.1063/1.4892675
Division

MaSF

Department

MaSF-E

PID

00bc5c41bfa979b0bd2bb5ed0cc1d9a1

Alternate TitleJ. Appl. Phys.
LabelOA
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