PatentDOI
High-current, low-pressure plasma-cathode electron gun
TLDR
In this article, a thermionic emitter within an enclosure with a partially transparent electrode defining a plasma face is described, where a magnetic system forms an inward directed field, and a portion of the plasma electrons are directed through this field to enhance ionization efficiency.Abstract:
Plasma-cathode electron gun structures capable of operation in low-pressure, e.g., <5×10 -3 Torr, ionizable gas environments are disclosed. They utilize a thermionic emitter within an enclosure with a partially transparent electrode defining a plasma face. Spaced anodes are disposed adjacent the electrode to extract an electron beam from the plasma face. A magnetic system forms an inward directed field, and a portion of the plasma electrons are directed through this field to enhance ionization efficiency.read more
Citations
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Journal ArticleDOI
Fore-vacuum plasma-cathode electron sources
V. A. Burdovitsin,Efim Oks +1 more
TL;DR: In this paper, a review of physical principles, design, and performances of plasma-cathode direct current (dc) electron beam guns operated in so-called fore-vacuum pressure (1-15-Pa) was presented.
Patent
Controlled fusion in a field reversed configuration and direct energy conversion
Hendrik J. Monkhorst,N. Rostoker +1 more
TL;DR: In this article, a system and apparatus for controlled fusion in a field reversed configuration (FRC) magnetic topology and conversion of fusion product energies directly to electric power is presented.
Patent
Methods and apparatus for generating strongly-ionized plasmas with ionizational instabilities
TL;DR: In this paper, the authors described a strongly ionized plasma generator with a chamber for confining a feed gas and a pulsed power supply connecting an anode and a cathode assembly.
Journal ArticleDOI
Recent progress in the development of plasma-filled traveling-wave tubes and backward-wave oscillators
TL;DR: In this article, a review of recent advances in this field is presented with emphasis on basic processes, including the formation of hybrid waves in plasma-filled slow wave structures (SWSs), the role of these modes in improving the beam/wave coupling, the beneficial role of ac space charge in plasma filled devices and the effect of plasma on electron beam transport.
Journal ArticleDOI
Pulsed plasma electron sourcesa)
Ya. E. Krasik,D. Yarmolich,J. Z. Gleizer,Vladislav Vekselman,Y. Hadas,V. Tz. Gurovich,Joshua Felsteiner +6 more
TL;DR: In this paper, a review of several types of plasma electron sources will be considered, namely, passive (metal ceramic, velvet and carbon fiber with and without CsI coating, and multicapillary and multislot cathodes) and active (ferroelectric and hollow anodes) plasma sources.
References
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Book
Introduction to Plasma Physics and Controlled Fusion
TL;DR: In this article, the authors presented a three-hour final exam on the theory of wave motion in a cold uniform plasma and showed that it can be viewed as a form of particle motion.
Journal ArticleDOI
Magnetic Multipole Containment of Large Uniform Collisionless Quiescent Plasmas
TL;DR: In this paper, over 1200 Alnico magnets are used to contain a conventional discharge plasma produced by 1-20 A of emission from 6-48 small filaments at − 60 V.
Journal ArticleDOI
Large-area lanthanum hexaboride electron emitter
TL;DR: In this article, a large area cathode assembly capable of continuous, high-current electron emission is described, which utilizes an indirectly heated lanthanum hexaboride (LaB6) disk as the thermionic electron emitter.
Journal ArticleDOI
High-power microwave source based on an unmagnetized backward-wave oscillator
TL;DR: The PASOTRON (Plasma-Assisted Slow-Wave Oscillator) as discussed by the authors uses a long-pulse E-gun and plasma-filled slow-wave structure (SWS) to produce high-energy microwave pulses from a simple, lightweight device that utilizes no externally-produced magnetic fields.