Abstract
Interchange turbulence in two-dimensions is investigated in the Scrape-Off Layer of fusion devices, when driven by a constant core particle influx. Contrary to the standard gradient driven approach, density is allowed to fluctuate around its average profile. Transverse transport exhibits some of the features of Self-organised Critical systems, namely, inward and outward avalanches, together with a frequency spectrum decrease in 1 / f and f{sup -2} at intermediate and high frequencies respectively. An avalanches occurs when follows the large radial structures of the electric potential. As experimentally, the radial profile of density relative fluctuations decreases from the wall into the core plasma, while that of density relative fluctuations peaks inside the SOL. Equilibrium density exhibits the experimental exponential decrease. An analytical expression of the SOL width {Delta}{sub SOL} is obtained, which maximizes the linear growth rate, when the poloidal modulation of electric potential equilibrium is taken into account. The parametric dependence of {Delta}{sub SOL} well agrees with experimental data. (authors) 31 refs.
Ghendrih, Ph;
[1]
Sarazin, Y
[2]
- Association Euratom-CEA, CEA Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee
- Universite de Provence, 13 - Marseille (France). Centre de Saint Jerome, Equipe Turbulence Plasma
Citation Formats
Ghendrih, Ph, and Sarazin, Y.
Soc dynamics in a 2D model of turbulent particle transport in the sol.
France: N. p.,
1998.
Web.
Ghendrih, Ph, & Sarazin, Y.
Soc dynamics in a 2D model of turbulent particle transport in the sol.
France.
Ghendrih, Ph, and Sarazin, Y.
1998.
"Soc dynamics in a 2D model of turbulent particle transport in the sol."
France.
@misc{etde_10147099,
title = {Soc dynamics in a 2D model of turbulent particle transport in the sol}
author = {Ghendrih, Ph, and Sarazin, Y}
abstractNote = {Interchange turbulence in two-dimensions is investigated in the Scrape-Off Layer of fusion devices, when driven by a constant core particle influx. Contrary to the standard gradient driven approach, density is allowed to fluctuate around its average profile. Transverse transport exhibits some of the features of Self-organised Critical systems, namely, inward and outward avalanches, together with a frequency spectrum decrease in 1 / f and f{sup -2} at intermediate and high frequencies respectively. An avalanches occurs when follows the large radial structures of the electric potential. As experimentally, the radial profile of density relative fluctuations decreases from the wall into the core plasma, while that of density relative fluctuations peaks inside the SOL. Equilibrium density exhibits the experimental exponential decrease. An analytical expression of the SOL width {Delta}{sub SOL} is obtained, which maximizes the linear growth rate, when the poloidal modulation of electric potential equilibrium is taken into account. The parametric dependence of {Delta}{sub SOL} well agrees with experimental data. (authors) 31 refs.}
place = {France}
year = {1998}
month = {Dec}
}
title = {Soc dynamics in a 2D model of turbulent particle transport in the sol}
author = {Ghendrih, Ph, and Sarazin, Y}
abstractNote = {Interchange turbulence in two-dimensions is investigated in the Scrape-Off Layer of fusion devices, when driven by a constant core particle influx. Contrary to the standard gradient driven approach, density is allowed to fluctuate around its average profile. Transverse transport exhibits some of the features of Self-organised Critical systems, namely, inward and outward avalanches, together with a frequency spectrum decrease in 1 / f and f{sup -2} at intermediate and high frequencies respectively. An avalanches occurs when follows the large radial structures of the electric potential. As experimentally, the radial profile of density relative fluctuations decreases from the wall into the core plasma, while that of density relative fluctuations peaks inside the SOL. Equilibrium density exhibits the experimental exponential decrease. An analytical expression of the SOL width {Delta}{sub SOL} is obtained, which maximizes the linear growth rate, when the poloidal modulation of electric potential equilibrium is taken into account. The parametric dependence of {Delta}{sub SOL} well agrees with experimental data. (authors) 31 refs.}
place = {France}
year = {1998}
month = {Dec}
}