3 research outputs found
Spectroscopic characterization and imaging of laser- and unipolar arc-induced plasmas
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
0.7–2.01020m3, 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 71019–11022m3, respectively.
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