are not directly accelerated into walls. This is difficult to achieve without detailed surveys of equipotential surfaces Reference Komurasaki, K, Hirakowa, M. and Arakawa, Y, IEPC paper 91-078. 22 Electric Propulsion Conference, Viareggio, Italy Oct. 1991 1-D Model of hall thruster M=-1 Drift (not included) Anode pre-sheath ionization Define「e=n(v。<0,sor。<0) T=neVi (2) Tn=nvn v,=constant=SKT w (3) 1. Conservation of particles n=n vion dx (4) 16.522, Space P pessan Lecture 18 Prof. Manuel martinez Page 5 of 2016.522, Space Propulsion Lecture 18 Prof. Manuel Martinez-Sanchez Page 5 of 20 are not directly accelerated into walls. This is difficult to achieve without detailed surveys of equipotential surfaces. Reference: Komurasaki, K, Hirakowa, M. and Arakawa, Y., IEPC paper 91-078. 22nd Electric Propulsion Conference, Viareggio, Italy, Oct. 1991. 1-D Model of Hall Thruster Define Γe ee =n v ( ) v < 0, so < 0 e e Γ (1) Γi ei =n v ( ) + or - (2) Γn nn =n v w n i 5 kT v constant 3 m   (3) 1. Conservation of particles e i n e ion d d d = =- =n dx dx dx Γ Γ Γ ν (4) Drift Zone SHEATH (not included) Sonic point Ionization region M = -1 Tw x Anode Pre-sheath Diffusion