High-pressure dc glow discharges in hollow diamond cathodes
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2016-02-05 |
| Journal | Plasma Sources Science and Technology |
| Authors | Benjamin S. Truscott, C. Michael R. Turner, Paul May |
| Institutions | University of Bristol |
| Citations | 5 |
Abstract
Section titled āAbstractāWe report the generation and characterization of dc helium microdischarges at several times atmospheric pressure in monolithic diamond hollow-cathode devices having cavity diameters on the order of 100 Ī¼m. I-V characteristics indicated operation in the glow discharge regime even at nearly 10 atm, while spectroscopic measurements of the N2 C3Ī u ā B3Ī g emission returned rotational temperatures always around 420 K, with a pressure-dependent vibrational population distribution. The variation of breakdown voltage with pressure closely followed Paschenās law, but with offsets in both axes that we tentatively ascribe to strong diffusive loss and a partial thermalization of electron energies under the high pressures considered here.