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For realization of nuclear fusion research, to resolve followed problem is important.
- Reducing
heat load at divertor plate (We focus on divertor geometries, control
of pulse flow due to ELM (Edge Localized Mode) and impurity seeding in
divertor.).
- Development of large-current negative ion beam source for NBI (Neutral Beam Injection) system to heat core plasma.
- Technics of separation and recovery helium ash in divertor
In
Tonegawa laboratory, research using the sheet plasma generator called
TPD-SheetIV (Test Plasma produced by Directed current for Sheet plasma
IV).
The
sheet plasma is compressed by electric field between plasma and
electrodes which is set between anode and cathode in TPD-SheetIV.
Therefore, our sheet plasma gives high density plasma experiments such
as experimental divertor simulation and so on.
Due
to sheet shape, our sheet plasma has many features such as a high
efficiency ion heating by ICR heating and a high density negative ion
production.
For
measurement apparatus, we have Omegatron type mass-analyzer to measure
densities and temperatures of ions in plasma such as H+, H2+, H3+, H-
and He+ and fast scanning probe system to measure plasma parameters
using each probes even in high heat flux sheet plasma.
For
analysis physical reaction processes in hydrogen plasma from
experimental results, we develop molecular and atomic
Collisional-Radiative (CR) model code.
Collaborators
of our laboratory are NIFS (National Institute for Fusion Science)
which has helical device LHD, Tsukuba University which has linear
device GAMMA 10/PDX, Nagoya University which has linear device
NAGDIS-II and Osaka Prefecture University which uses 2D neutral
transport code DEGAS2.
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