Abstract
With positive ambipolar potential, ion non-resonant neoclassical transport leads to increased particle confinement times. In certain regimes of filling pressure, microwave powers (ECRH and ICRH) and positive potential, new folds can now emerge from previously degenerate equilibrium surfaces allowing for distinct C, T, and M modes of operation. A comparison in the equilibrium fold structure is also made between (i) equal particle and energy confinement times, and (ii) particle confinement times enhanced over the energy confinement time. The nonlinear time evolution of these point model equations is considered and confirms the delay convention occurrences at the fold edges. It is clearly seen that the time-asymptotic equilibrium state is very sensitive, not only to the values of the control parameters (neutral density, ambipolar electrostatic potential, electron and ion cyclotron power densities) but also to the initial conditions on the plasma density, and electron and ion temperatures.
Citation Formats
Punjabi, A, and Vahala, G.
Effects of positive potential in the catastrophe theory study of the point model for bumpy tori.
United Kingdom: N. p.,
1985.
Web.
doi:10.1017/S0022377800002361.
Punjabi, A, & Vahala, G.
Effects of positive potential in the catastrophe theory study of the point model for bumpy tori.
United Kingdom.
https://doi.org/10.1017/S0022377800002361
Punjabi, A, and Vahala, G.
1985.
"Effects of positive potential in the catastrophe theory study of the point model for bumpy tori."
United Kingdom.
https://doi.org/10.1017/S0022377800002361.
@misc{etde_5344510,
title = {Effects of positive potential in the catastrophe theory study of the point model for bumpy tori}
author = {Punjabi, A, and Vahala, G}
abstractNote = {With positive ambipolar potential, ion non-resonant neoclassical transport leads to increased particle confinement times. In certain regimes of filling pressure, microwave powers (ECRH and ICRH) and positive potential, new folds can now emerge from previously degenerate equilibrium surfaces allowing for distinct C, T, and M modes of operation. A comparison in the equilibrium fold structure is also made between (i) equal particle and energy confinement times, and (ii) particle confinement times enhanced over the energy confinement time. The nonlinear time evolution of these point model equations is considered and confirms the delay convention occurrences at the fold edges. It is clearly seen that the time-asymptotic equilibrium state is very sensitive, not only to the values of the control parameters (neutral density, ambipolar electrostatic potential, electron and ion cyclotron power densities) but also to the initial conditions on the plasma density, and electron and ion temperatures.}
doi = {10.1017/S0022377800002361}
journal = []
volume = {33}
journal type = {AC}
place = {United Kingdom}
year = {1985}
month = {Feb}
}
title = {Effects of positive potential in the catastrophe theory study of the point model for bumpy tori}
author = {Punjabi, A, and Vahala, G}
abstractNote = {With positive ambipolar potential, ion non-resonant neoclassical transport leads to increased particle confinement times. In certain regimes of filling pressure, microwave powers (ECRH and ICRH) and positive potential, new folds can now emerge from previously degenerate equilibrium surfaces allowing for distinct C, T, and M modes of operation. A comparison in the equilibrium fold structure is also made between (i) equal particle and energy confinement times, and (ii) particle confinement times enhanced over the energy confinement time. The nonlinear time evolution of these point model equations is considered and confirms the delay convention occurrences at the fold edges. It is clearly seen that the time-asymptotic equilibrium state is very sensitive, not only to the values of the control parameters (neutral density, ambipolar electrostatic potential, electron and ion cyclotron power densities) but also to the initial conditions on the plasma density, and electron and ion temperatures.}
doi = {10.1017/S0022377800002361}
journal = []
volume = {33}
journal type = {AC}
place = {United Kingdom}
year = {1985}
month = {Feb}
}