Secondary electron emission from meteoric smoke particles inside the polar ionosphere

Secondary electron emission from meteoric smoke particles inside the polar ionosphere

The charging by secondary electron emission (SEE) from particles is known as a significant charging process in astrophysical plasmas. This work aims at evaluating the significance of SEE for charging of meteoric smoke particles (MSPs) in the Earth’s polar atmosphere. Here, the atmosphere is subject to a bombardment of energetic electrons from the magnetosphere (and partly the sun). We employ th...

The Polar Ionosphere: Editorial

Secondary-electron emission from hydrogen- terminated diamond

Diamond amplifiers demonstrably are an electron source with the potential to support high-brightness, highaverage-current emission into a vacuum. We recently developed a reliable hydrogenation procedure for the diamond amplifier. The systematic study of hydrogenation resulted in the reproducible fabrication of high gain diamond amplifier. Furthermore, we measured the emission probability of dia...

Secondary electron emission studies

Secondary-electron-emission processes under electron bombardment play an important role in the performance of a variety of electron devices. While in some devices, the anode and the grid require materials that suppress the secondary-electron-generation process, the crossed-field amplifier (CFA) is an example where the cathode requires an efficient secondaryelectron-emission material. Secondary-...

Interactions of meteoric smoke particles with sulphuric acid in the Earth’s stratosphere

Nano-sized meteoric smoke particles (MSPs) with iron-magnesium silicate compositions, formed in the upper mesosphere as a result of meteoric ablation, may remove sulphuric acid from the gas-phase above 40 km and may also affect the composition and behaviour of supercooled H2SO4H2O droplets in the global stratospheric aerosol (Junge) layer. This study describes a time-resolved spectroscopic anal...