Results 1 to 10 of about 2,133,051 (141)
A G-Band Broadband Continuous Wave Traveling Wave Tube for Wireless Communications
Micromachines, 2022 Development of a G-band broadband continuous wave (CW) traveling wave tube (TWT) for wireless communications is described in this paper. This device provides the saturation output power over 8 W and the saturation gain over 30.5 dB with a bandwidth of 27
Yuan Feng +5 more
doaj +1 more source
Vertical Nanoscale Vacuum Channel Triodes Based on the Material System of Vacuum Electronics
Micromachines, 2023 Nanoscale vacuum channel triodes realize the vacuum-like transmission of electrons in the atmosphere because the transmission distance is less than the mean free path of electrons in air.
Panyang Han +3 more
doaj +1 more source
Development and Application Prospect of Space Electric Propulsion Technology
气体物理, 2023 Space electric propulsion technology has entered a new stage of maturity and full application in China. In order to further promote and accelerate the development of electric propulsion technology, this paper adopted the methods of investigation and ...
Hai GENG +8 more
doaj +1 more source
Advances in Materials Science and Engineering, 2022 A range of titanium diaphragms for spacecraft propellant tanks are designed in detail, and two typical titanium diaphragms were manufactured and corresponding reversal tests were developed.
Tianju Ma +5 more
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Frontiers in Physics, 2022 In order to get a better tradeoff between the long lifetime and high performances of cesium beam atomic clocks, we proposed a design scheme of compact optically pumped cesium beam tube (OPCBT) based on hexapole magnetic focusing (HMF) system for the ...
Haijun Chen +3 more
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Vacuum Gasification-Directional Condensation for Separation of Tellurium from Lead Anode Slime
Metals, 2021 Tellurium is the indispensable base material of semiconductors in solar panels. Traditional tellurium recycling, a highly complicated separation process, has exhausted reagents and energy sources whilst producing waste residue and water containing ...
Zhe Gao +7 more
doaj +1 more source
Spatial evolution characteristics of ion and electron flow for 300 W class low-power Hall thruster
AIP Advances, 2021 The Faraday probe and cylindrical Langmuir probe were used to characterize the downstream ion and electron spatial evolution of a 300 W class low-power Hall thruster.
Xinwei Chen +10 more
doaj +1 more source
Vacuum defects without a vacuum [PDF]
, 1998 Topological defects can arise in symmetry breaking models where the scalar field potential $V(\phi)$ has no minima and is a monotonically decreasing function of $|\phi|$.
A. Vilenkin +10 more
core +4 more sources
On vacuum-vacuum amplitude and Bogoliubov coefficients [PDF]
, 2002 Even if the electromagnetic field does not create pairs, virtual pairs lead to the appearance of a phase in vacuum-vacuum amplitude. This makes it necessary to distinguish the in- and out-solutions even when it is commonly assumed that there is only one ...
A. A. Grib +16 more
core +2 more sources
, 1999 We analyse symmetry breaking in general gauge theories paying particular attention to the underlying geometry of the theory. In this context we find two natural metrics upon the vacuum manifold: a Euclidean metric associated with the scalar sector, and ...
Lepora, Nathan. F.
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