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TPD-Sheet IV

A experimental facility: TPD-Sheet IV (for the Test plasma Produced by Direct current (TPD)-type DC discharge for Sheet plasma) was proposed in a linear divertor plasma simulator at Tokai University. The TPD-Sheet IV device consists of the sheet plasma source, 11 rectangular magnetic coils, ICR heating part, a measurement part, end chamber, a vacuum exhaust. These are rectangular magnets to generate the magnetic field of about 0.1 T. The TPD-Sheet IV facility employs a DC plasma source which can generate steady state hydrogen, deuterium and helium plasmas with the density of the order of 1019 m-3 and the electron temperatures around 10-15eV with a discharge current of 30-100 A. Installed on TPD-Sheet IV are fast scanning Langmuir probe, an optical VUV spectrometer, a omegatoron mass-analyzer, all of which are for the sake of plasma characteristics.



Ion acceleration of high density sheet plasma in a non-uniform magnetic field by ion-cyclotron resonance (ICR) is investigated in TPD-Sheet IV. The ion energy along the axis of the magnetic field or in the perpendicular direction was measured using a Faraday cup. Ion energy in the direction perpendicular to the magnetic field line is increased by ICR and ions are also accelerated along the axis of the magnetic field line, due to the magnetic field gradient along the axis.



Experimental simulations of effects of the divertor target geometry on the formation of detached sheet plasma in TPD-Sheet IV are presented.


Our research theme and plans are showed inhere.
(Parts of power point in 25TH IAEA FUSION ENERGY CONFERENCE)
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