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(EX/P2-10) Fusion Oriented Plasma Research in Bangladesh: Impact of Dust on Plasma

M.K. Islam1), M. Salimullah2), K. Yatsu3), Y. Nakashima3), Y. Ishimoto3)
1) Institute of Nuclear Science and Technology, Atomic Energy Commission, Dhaka, Bangladesh
2) Department of Physics, Jahangirnagar University, Savar, Dhaka, Bangladesh
3) Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki, Japan

Abstract.  Study on dusty plasma is important to understand the crucially adverse effect of dust on the fusion plasma. Detailed results of theoretical investigation on the properties and excitation of dust-modes in a low-temp dusty plasma including the ions streaming, dust charge fluctuation and kinetic effects are given. In the case of high- and low-density dusty plasma, the dust-lower-hybrid (dlh) and dust-acoustic (DA) modes propagating nearly perpendicular to the external B have been obtained, respectively. It is found that in any case of the modes, the Landau damping linearly adds to the dust charge fluctuation damping and the DA mode is damped rapidly compared to the dlh mode through these dampings. Collaboration with Japanese institute in the subject of plasma-wall interaction and dusty plasma has been started. Results of the investigation on edge plasma behavior in the anchor cell of GAMMA10 are given. Significant influence of the local non-axisymmetric magnetic field on the ions is found. The evidence which indicates the cold plasma formation in the anchor cell is explained from the viewpoint of enhanced outgassing from the wall due to the interaction of the drifted out passing ions.

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IAEA 2003