A low energy ion beam system for space charge compensation (SCC) experiments was developed and evaluated. This system was designed for observation of SCC of a positive ion beam with an electron beam. The system consisted of the ion source chamber and the SCC experiment chamber. The ion source chamber was equipped with the compact microwave ion source for low voltage extraction. Ion current at i...

A graphene Schottky contact was fabricated on an AlGaN/GaN heterostructure and subsequently analyzed. The calculated experimentally measured barrier heights (SBHs) determined using the theoretical Schottky–Mott model, thermionic emission temperature-dependent current–voltage measurement, capacitance–voltage measurement were observed to be inconsistent, which attributed ambiguities in both area ...

Dark current in AIGaAs/GaAs two-dimensional electron gas charge-coupled devices (2DEG CCDs) is investigated both theoretically and experimentally. Measurement of the dark current for temperatures in the range 160 K to 360 K was performed and compared with the results of numerical modelling. It is found that thermionic-field emission of electrons from the gate to the channel is the dominant mech...

Abstract In this work, a test set-up device is designed, developed and manufactured to perform direct measurement of the current emission enhancement that photon absorption can bring thermionic in Photon-Enhanced Thermionic Emission Device (PETED) where C12A7:e- electride used as semiconductor due its low work function value 2.4 eV. Even though measured starts at operational temperatures, obtai...

Thin films based on aluminum nitride were obtained by fs-laser assisted Pulsed Laser Deposition (fs-PLD) at room temperature tantalum substrates for studying the electron emission performance in range 700- 1600 °C, so to investigate possibility of their exploitation as thermionic cathodes. Results structural, chemical and morphological analyses show growth nanostructured thin with a significant...

We analyze the two-dimensional electron gas (2DEG) heating by incident terahertz (THz) radiation in field-effect transistor (FET) structures with graphene channels (GCs) and black-phosphorus black-arsenic gate barrier layers (BLs). Such GC-FETs can operate as bolometric THz detectors using thermionic emission of hot electrons from GC via BL into gate. Due to excitation plasmonic oscillations si...

Ionization mechanisms in the low-temperature thermal plasma, which contains alkali metal atoms as ionizable component and nanosized dust grains, are studied. In such a electrons captured by because work function of grains depends on their sizes, electron adsorption rate is more than thermionic emission for grains. Accordingly, an increase grain number leads to decrease volume ionization recombi...