Abstract: A fluid model including two-temperature electrons was constructed for a collisionless plasma sheath. Effects of two-temperature electrons on sheath of stationary plasma were simulated. It is found that as temperature of cold electron is lower or density of cold electron at sheath adge is smaller critical ion Mach number decreases, sheath width becomes narrow and ion energy flow deposited on wall reduces. In addition, it is discussed that sheath thickness and ion energy flow deposited on wall are affected by cold electron in different plasma species.

Key words: plasma sheath, plasma simulation, Mach number, energy flow