Applied Physics Letters
A fluid model has been developed and used to help clarify the physical mechanisms occurring in microhollow cathode discharges (MHCD). Calculated current-voltage (I-V) characteristics and gas temperatures in xenon at 100 Torr are presented. Consistent with previous experimental results in similar conditions, we find a voltage maximum in the I-V characteristic. We show that this structure reflects a transition between a low-current, abnormal discharge localized inside the cylindrical hollow cathode to a higher-current, normal glow discharge sustained by electron emission from the outer surface of the cathode. This transition, due to the geometry of the device, is a factor contributing to the well-known stability of MHCDs.
Original Publication Citation
Boeuf, J. P., Pitchford, L. C., & Schoenbach, K. H. (2005). Predicted properties of microhollow cathode discharges in xenon. Applied Physics Letters, 86(7), 071501. doi:10.1063/1.1862781
Boeuf, J. P.; Pitchford, L. C.; and Schoenbach, K. H., "Predicted Properties of Microhollow Cathode Discharges in Xenon" (2005). Bioelectrics Publications. 234.