Analytic Approximate for the Plasma Sheath Potential

19th Chilean Physics Symposium 2014

Martin, Pablo^1,2 ; Maass-Artigas, Fernando^1 ; Cortés-Vega, Luis^1,3

Physics Department, Antofagasta University, Casilla 170, Antofagasta, Chile^1

Physics Department, Simón Bolivar University, Apartado 89000, Caracas

1083 A, Venezuela^2

Mathematics Department, Antofagasta University, Casilla 170, Antofagasta, Chile^3

关键词: Analytic approximation;    Ion velocity;    Wall potential;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/720/1/012040/pdf
DOI  :  10.1088/1742-6596/720/1/012040

来源: IOP

【 摘 要 】

Here a new analytic approximation for the Bhom Sheath Potential is presented, which is valid for any value of the characteristic parameter K, measuring the mean ion velocity. The procedure to obtain this approximation is different to those used by previous authors, because now, the characteristic exponential parameter λ, depends on the parameter K, as well as the wall potential φw. In previous works that parameter used to be function of K only, and all the approximation used to fail for K ≤ 1/2, which is not the case now.