Monte Carlo simulation of electron swarm parameters in c-C₄F₈

Department of Electrical Engineering, Shanghai Jiao Tong University, No. 1954 Huashan Rd, Shanghai 200030, P.R. China

Corresponding author: dmxiao@sjtu.edu.cn

Received: 14 June 2006
Accepted: 3 April 2007
Published online: 13 June 2007

Abstract

Perfluorocyclobutane (c-C₄F₈) is one of the most promising gases to be used in gas mixtures, which are the candidates to substitute for SF₆ gas as high dielectric strength insulators with a reduced potential for global warming. The set of initial collision cross-sections are assembled and modified. The motion of electrons in c-C₄F₈ in uniform electric fields is simulated using Monte Carlo method. Also the density-normalized ionization coefficients α/N, attachment coefficients η/N, the effective ionization coefficients (α – η)/N, drift velocity (V_e) and the electron longitudinal diffusion coefficient (ND_L) are calculated for the range of density-reduced electric field strength, 300 E/N 1000 Td. The electron swarm parameters of simulation are compared with experimental data and other results of simulation, which obtain a good agreement. However, further calculations and measurements for c-C₄F₈, such as η/N and ND_L are required.