Objective
The origin of an anomalous transport is the fundamental problem in High Temperature Plasma Physics. Options to improve confinement in a laboratory plasma are addressed worldwide by employing both theoretical and experimental methods. In 1982 the operational scenario with reduced energy and particle transport - H-mode - was discovered in the experiments with powerful auxiliary heating. Since then, the universal nature of the H-mode phenomenon has been well established. Similarity of underlying physical phenomena accompanying transition into H-mode in ohmically and in auxiliary heated plasmas has been demonstrated by TUMAN-3 and COMPASS-D teams in previous studies.
The activities of the project include: measurements of radial electric fields and plasma rotation in a different operating modes of TUMAN-3M; analysis of these experimental data and their implication for H-mode transition theories; experiments on H-mode triggering by boundary pellet ablation; development of a theory for description of a pellet assisted H-mode transition.
The experimental study will be performed on the small scale tokamak TUMAN-3M in A.F.Ioffe Physico-Technical Institute. Device parameters are as follows: vacuum vessel major radius - 0.55 m, minor radius - 0.24 m, toroidal field < 2.0 T, plasma current < 200 kA. To perform proposed rotation and electric field measurements new visible spectrometer and energy analyzer for Heavy Ion Beam Probing system will be build. Within the framework of the project pellet injectors will be modified to provide the trigger of the improved confinement mode in a laboratory plasma.
The results of the studies will be published in the scientific papers.
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Programme(s)
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Coordinator
OX14 3DB Abingdon
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.