Macroparticle generation in DC arc discharge from a WC cathode

Macroparticle generation in DC arc discharge from a WC cathode

We have studied macroparticle generation from a tungsten carbide (WC) cathode used in a dc vacuum arc discharge. Despite a relatively high decomposition/melting point (~ 3100 K), there is an intensive generation of visible particles with sizes in the range 20-35 μm. Visual observations during the discharge and scanning electron microscopy of the cathode surface as well as of collected macropart...

Macroparticle Charging in a Pulsed Vacuum Arc Thruster Discharge

A pulsed vacuum arc discharge emits a plasma as well as macroparticles in the form of micron-sized molten droplets of cathode material. Due to their trajectory and size, these macroparticles often pose a contamination threat for both spacecraft-based thrusters, and thin film deposition systems. The charge of these macroparticles was experimentally measured, and compared to a model based on ther...

Effect of arc behaviour on the temperature fluctuation of carbon electrode in DC arc discharge

Vacuum arc plasma generation and thin film deposition from a TiB2 cathode

Preparation of carbon nanotubes by DC arc discharge process under reduced pressure in an air atmosphere

Carbon nanotubes (CNTs) were grown using a DC arc discharge process in an air atmosphere and relevant process parameters were investigated. ithout using an inert gas, multi walled carbon nanotubes could be synthesized in the deposit area of the cathode even in an air atmosphere, but ingle walled carbon nanotubes were not detected in the soot area despite using the same process conditions as in ...