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Abnormal thermal field electron emission energy conversion method for vacuum electron-optical systems (EOS) with a nanostructured surface electron sources is offered and developed. Physical and numerical modeling of an electron emission and transport processes for different EOS is carried out. It is shown that at the specific configuration of electrostatic and magnetic fields in the EOS offered method...
A study of the field emission properties of ZrO2/W nanoheterostructures (NS) is presented. The NS was represented by a thin (∼10 nm) ZrO2 layer at the tip of a needle-shaped W<100> and W<111> microcrystals. It has been revealed that at temperatures NS substance within 1950K to 2150K the NS shows an abnormally high normalized brightness (up to ∼ 106 A/(cm2 sr V)) and high stability of field...
New thermal field electron emission energy conversion method for vacuum electron-optical systems (EOS) with a nanostructured surface electron sources is offered and developed. Physical and numerical modeling of an electron emission and transport processes for different EOS is carried out. It is shown that at the specific configuration of electrostatic and magnetic fields in the EOS offered method...
New thermal field electron emission energy conversion method for vacuum electron-optical systems (EOS) with a nanostructured surface electron sources is developed. Physical and numerical modeling of an electron emission and transport processes for different EOS was carried out. Studies have shown that nanoscale thermal field emission EOS can be used to design and create stand-alone devices converting...
Experimental researches of thermal field emission properties ZrO2/W nanoheterostructures (NHS), formed by thin (∼10 nm) ZrO2 layers on the W microcrystals surface oriented in the <100> and <111> directions, are carried out.
New approach to thermal-to-electrical energy conversion problem on the bases of the thermal field electron emission phenomenon for vacuum emission systems with a nanostructured surface electron sources is offered and developed. Physical and numerical modeling of an electron emission and transport processes for different electron-optical systems is carried out.
In this paper, the model of "low-voltage" field emission phenomenon from the surfaces of low-dimensional NHS is constructed. The vacuum diode, was modeled by a 2D structure: metal-a thin (about ~ 3-10 nm) dielectric film placed into vacuum under a homogeneous electrostatic field of strength Fe.
A study of the field emission properties of ZrO2/W and ZrO2/Mo nanoheterostructures is presented. The nanoheterostructure (NHS) was represented by a thin (~3-10 nm) ZrO2 layer at the tip of a needle-shaped W<100>, W<111>, Mo<100> and Mo<111> microcrystals (MC). It is established, that at temperature of NHS substance ~ (1900plusmn100)K process of thermal field electron emission...
The emission of excited neutrals and positive ions from the liquid metal surface in electric fields depends on thermal field processes. Such processes include interaction between the liquid metal surface and electron flux of high power density exceeding a threshold value P*, evaporation of neutrals activated by metal electron subsystem excitation, and lastly, field ionization of evaporating neutrals...
As is known, laser ablation is widely used in time-of-flight mass spectrometry as well as in modern micro and nanoelectronics, microelectromechanics for structural surface modification and profiling of condensed substances. In the present work the phenomenon of ablation is treated as a fast process of phase bound-free transition in excited or ionized structural elements (atoms, molecules) of condensed...
The emissive and electro-optical characteristics of ZrO/W Schottky cathodes used as bright thermal field electron sources for electron microscopy and lithography instruments are theoretically studied. The models using TAU software package is in good quantitative agreement with experimental data for electrostatic field potential distribution and surface field strength for conventional cathodes
This paper investigated the electron emission properties of self-assembled GaAs nanowhiskers (NWs) grown by MBE which includes electron emission current, potential difference dependences in the vacuum gap between the probe tip and GaAs NWs surface. The analysis shows that the electron emission from the NWs nanostructure surface is the result of electron tunneling from the indicated above surfaces...
Summary form only given: The report presents a new physical nanotechnology procedure to produce self-assembled nanoheterostructures (NHS) formed in thin (~10 nm) (ZrO2) dielectric layers at the surface of needle-shaped Wlang100rang microcrystals. The studies of thermally activated electron emission from the ZrO2-vacuum interface into vacuum under electrostatic field have shown that the electron emission...
The physical mechanism of field emission from the surface of epitaxial ZrO2/W nanoheterostructure is studied under high vacuum conditions. Results reveal an abnormally high normalized brightness and high field emission stability. This abnormal thermal field emission phenomenon can be used to produce new high intensity stationary electron sources as well as efficient thermal and electromagnetic radiation...
An electron-optical system (with a thermal field electron source-cathode) is introduced. The system is designed to form on the target surface submicron microprobes of a power density exceeding the ablation threshold (~10 8 W/cm 2 ) of condensed media. The numerical modeling of electron paths carried out using a software package (TAU) developed by the authors has shown that the proposed...
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