Observation of stable superdense core plasmas in the large helical device.
In reduced recycling discharges in the Large Helical Device, a super dense core plasma develops when a series of pellets are injected. A core region with density as high as 4.5 x 10(20) m(-3) and temperature of 0.85 keV is maintained by an internal diffusion barrier with very high-density gradient. These results may extrapolate to a scenario for fusion ignition at very high density and relatively low temperature in helical devices.
Ohyabu
N
N
National Institute for Fusion Science, Toki 509-5292, Japan.
Morisaki
T
T
Masuzaki
S
S
Sakamoto
R
R
Kobayashi
M
M
Miyazawa
J
J
Shoji
M
M
Komori
A
A
Motojima
O
O