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The reserves of krypton are abundant, and it has become an important high specific impulse substitute for Hall thrusters as its physical properties are closest to xenon. However, it has been found that the plasma beam of a Hall thruster has weak plume-focusing characteristics and the half-divergence angle is large when using krypton as a propellant. In this paper, the thrust, specific impulse, efficiency,...
The electric propulsion hollow cathode is a thermal electron emission device that can be used as an electron source and a neutralizer for aerospace electric propulsion systems. As a serial structure, the cathode's life reliability is the key to its application in orbit. The heater is used to start the hollow cathode, and short-circuit and open-circuit failure are important forms of hollow cathode...
Using grooves created along the axial direction of the discharge channel, a method for measuring sheath thickness in Hall-type stationary plasma thrusters has been developed. By distorting the wall surface using these grooves, it is possible to numerically study the effect of the wall surface on the sheath and near wall conductivity. Monte Carlo method is applied to calculate the electron temperature...
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