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Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
A.A. Kabantsev, V.B. Reva, V.G. Sokolov
Fusion Science and Technology | Volume 35 | Number 1 | January 1999 | Pages 185-189
Oral Presentations | doi.org/10.13182/FST99-A11963848
Articles are hosted by Taylor and Francis Online.
We report the first experimental verification of the magnetohydrodynamic (MHD) dynamo in the axisymmetric linear machine. The dynamo phenomenon, in which the magnetic-field-aligned electric current is self-generated by plasma dynamics, has been a puzzle not only in astrophysical plasmas, but also in magnetically confined laboratory plasmas for many decades. The mirror trap axisymmetric plasma, in which the unstable differential rotation of plasma column in crossed E×B fields excites the helical MHD turbulence, is a new and particularly vivid example of the dynamo effect.
By manipulating the trap's magnetic and plasma conditions, we have obtained both the parallel and the antiparallel to the magnetic field electric current with density to the order of 100 A/cm2 (total current up to 6 kA) in the plasma. The measured mean electromotive force Fem has linear dependence from the turbulent diffusion coefficient DT (r,t) and reachs up to 50 V/m. By measuring each term of Fem, the parallel MHD mean-field Ohm's law has been observed to hold within experimental error bars during plasma flow pulse. A comprehensive physical picture of the dynamo phenomenon has been obtained.
