TJ-IU
In the torsatron TJ-IU, a single coil generates the helicoidal magnetic field (l=1). The number of turns of the coil around the vacuum chamber is m=6. The vertical field is generated by a set of vertical field coils.
The name 'TJ-IU' arises as this machine was an upgrade ('U') of the TJ-I device, in the sense that much auxiliary equipment from the latter was reused to operate TJ-IU.
| Parameter | Value | Unit |
|---|---|---|
| Major radius, R0: | 0.60 | m |
| Mean plasma radius, a: | 0.10 | m |
| Minor coil radius, Rc: | 0.24 | m |
| Number of periods, m: | 6 | |
| Rotational transform at the axis, ι0: | 0.30 | |
| Magnetic shear: | almost zero | |
| Magnetic well depth: | 6.9 | % |
| Magnetic ripple at the axis: | 7.6 | % |
| Helical axis elongation: | 0.025 | m |
| Toroidal field, BT, at φ=30 degrees: | 0.5 | T |
| 2nd harmonic Electron Cyclotron Heating, 28 - 37.5 GHz: | 200 | kW |
The device was entirely built in Spain and taken into operation in 1994. In 1999, the device was sent to the University of Kiel, Germany, under a permanent loan agreement, and renamed TJ-K. Currently, TJ-K is located at the University of Stuttgart in Germany.
External links
References
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- E. Ascasíbar, C. Alejaldre, et al, First results of the TJ-I U torsatron, Transactions of Fusion Technology 27 (1995) 198
- B.A. Carreras, C. Hidalgo, E. Sánchez, M.A. Pedrosa, R. Balbín, I. García-Cortés, B.Ph. van Milligen, D.E. Newman, V.E. Lynch, Fluctuation-induced flux at the plasma edge in toroidal devices, Plasma Physics 3 (7) (1996) 2664
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- B.A. Carreras, R. Balbin, B. van Milligen, M.A. Pedrosa, I. Garcia-Cortes, E. Sanchez, C. Hidalgo, J. Bleuel, M. Endler, H. Thomsen, A. Chankin, S. Davies, K. Erents, and G.F. Matthews, Characterization of the frequency ranges of the plasma edge fluctuation spectra, Phys. Plasmas 6 (1999) 4615