RT info:eu-repo/semantics/article
T1 Measured cathode fall characteristics depending on the diameter of a hydrogen hollow cathode discharge
A1 Gonzalez-Fernandez, V
A1 Grützmacher, K
A1 Steiger, A
A1 Pérez, C
A1 Grützmacher, K.
A1 Rosa García, María Inmaculada de la
K1 hollow cathode discharge
K1 laser spectroscopy
K1 optogalvanic detection
K1 electric field
K1 cathode fall region
K1 2209 Óptica
AB In this work, Doppler-free two photon optogalvanic spectroscopy is used to measure the electric field strength in the cathode fall region of a hollow cathode discharge, operated in pure hydrogen, via the Stark splitting of the 2S level of atomic hydrogen. The cathode fall characteristics are analysed for various pressures and in a wide range of discharge currents. Tungsten is used as the cathode material, because it allows for reliable measurements in a fairly wide range of discharge conditions and because of its minimal sputtering. Two cathode diameters (10 mm and 15 mm) are used to study the dependence of the cathode fall on discharge geometry. The measurements reveal that the cathode fall characteristics are quite independent on the cathode diameter for equal cathode current density; hence the measurements can be used to test one dimensional modelling of the cathode fall region for low pressure hydrogen discharges using e.g. plane parallel electrodes.
PB IOP Publishing Ltd.
SN 1361-6595
YR 2017
FD 2017
LK https://uvadoc.uva.es/handle/10324/65837
UL https://uvadoc.uva.es/handle/10324/65837
LA eng
NO Plasma Sources Science and Technology, vol. 26, n.10, 2017
NO Producción Científica
DS UVaDOC
RD 12-jul-2024