ISSN:
1562-6938
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract In experiments on studying the ohmic H-mode in the TUMAN-3M tokamak, it is found that, in high-current (I p∼120–170 kA) discharges, a region with high electron-temperature and density gradients is formed in the plasma core. In this case, the energy confinement time τ E attains 9–18 ms, which is nearly twice as large as that predicted by the ELM-free ITER-93H scaling. This is evidence that the internal transport barrier in a plasma can exist without auxiliary heating. Calculations of the effective thermal diffusivity by the ASTRA transport code demonstrate a strong suppression of heat transport in the region where the temperature and density gradients are high.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.952838
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