Abstract
Turbulence suppression by shear in the E x B flow is a widely accepted mechanism. Edge polarization experiments on TEXTOR-94 have been used to study the dependence on the toroidal magnetic field, plasma current and plasma composition of the critical E x B shear, defined as the highest rate of change in the diffusion coefficient with shear. Our experiments show that an increase of the isotopic mass and/or a decrease of the toroidal magnetic field leads to higher critical E x B flow shear, whereas a change of the plasma current seems to have no effect.
| Original language | English |
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| Pages (from-to) | A147-A152 |
| Journal | Plasma Physics and Controlled Fusion |
| Volume | 42 |
| Issue number | SUPPL. 5A |
| DOIs | |
| Publication status | Published - 2000 |