RT info:eu-repo/semantics/article
T1 Influence of the cathode material in the cathode fall characteristics of a hydrogen hollow cathode glow-discharge
A1 González Fernández, Verónica
A1 Grützmacher, K.
A1 Pérez, C.
A1 Rosa García, María Inmaculada de la
K1 Photoionization
K1 Plasmas
K1 Gas discharges
K1 Optogalvanic spectroscopy,
K1 Ultraviolet lasers
K1 Stark effect
K1 2209 Óptica
AB In this work, we present Doppler free two photon optogalvanic measurements to determine the localelectric field strength (E-field) in the cathode fall region of a hollow cathode discharge, operated inpure hydrogen, via the Stark splitting of the 2S level of hydrogen. The main aim of this article is thecomparison of the measurements made with different cathode materials, stainless steel, andtungsten; both of them are widely used in the low-pressure discharges. Sputtering of stainless steelis the principle cause of the differences observed for the E-field variation, and the differencesare analyzed in the frame of the sputtered material in a wide range of discharge conditions.Complementary images of the discharge luminosity allow for the conclusion; the cathode dark zonecorresponds in good approximation to the cathode fall length.
PB AIP Publishing
SN 1089-7550
YR 2018
FD 2018
LK https://uvadoc.uva.es/handle/10324/65820
UL https://uvadoc.uva.es/handle/10324/65820
LA eng
NO Journal of Applied Physics, 124(3) 033302
NO Producción Científica
DS UVaDOC
RD 23-nov-2024