Results 191 to 200 of about 9,308 (245)
Some of the next articles are maybe not open access.
British Journal of Applied Physics, 1963
Electron emission in vacuum has been observed from thin film capacitor-like devices, prepared mainly by evaporation techniques and anodization. Continuous emission and destructive processes which depend on the insulating film and counterelectrode material are described. Transfer ratios up to 2% were obtained.
W Haas, R Johannes
openaire +2 more sources
Electron emission in vacuum has been observed from thin film capacitor-like devices, prepared mainly by evaporation techniques and anodization. Continuous emission and destructive processes which depend on the insulating film and counterelectrode material are described. Transfer ratios up to 2% were obtained.
W Haas, R Johannes
openaire +2 more sources
Diamond and Related Materials, 1995
Abstract Diamond junction cold cathodes composed of a phosphorus doped diamond layer and a boron doped diamond layer have been fabricated and tested. The devices were rectifying and had a large, temperature-dependent series resistance that limited the current when the device was forward biased.
G.R. Brandes +3 more
openaire +1 more source
Abstract Diamond junction cold cathodes composed of a phosphorus doped diamond layer and a boron doped diamond layer have been fabricated and tested. The devices were rectifying and had a large, temperature-dependent series resistance that limited the current when the device was forward biased.
G.R. Brandes +3 more
openaire +1 more source
2007
Publisher Summary A planar cathode is a thin-film emitter deposited on a conducting surface. It emits electrons when an electric field is applied by an anode separated from the film front surface by a vacuum gap. This chapter discusses thin film and ultra-thin film planar cathodes with effective low work function.
Vu Thien Binh, Vincent Semet
openaire +1 more source
Publisher Summary A planar cathode is a thin-film emitter deposited on a conducting surface. It emits electrons when an electric field is applied by an anode separated from the film front surface by a vacuum gap. This chapter discusses thin film and ultra-thin film planar cathodes with effective low work function.
Vu Thien Binh, Vincent Semet
openaire +1 more source
Compact cold-cathode electron buncher
IEEE Conference Record - Abstracts. 2002 IEEE International Conference on Plasma Science (Cat. No.02CH37340), 2003Summary form only given, as follows. We are developing a compact high-frequency electron buncher for applications in the next generation of microwave tubes and electron accelerators. This electron buncher uses a conventional Pierce-type electron gun with a gated field-emitter-array cathode for the production of short, 10 kV, 100 mA electron bunches ...
Jose E. Velazco, Peter H. Ceperley
openaire +1 more source
Coaxial cold-cathode magnetron
Fifth IEEE International Vacuum Electronics Conference (IEEE Cat. No.04EX786), 2004We have studied the experimental prototype of an X-band pulsed coaxial magnetron (CM): /spl tau/ = 70 ns; F = 1000/spl tau//s. The above magnetron uses a metalporous secondary-emission cathode (SEC) as a set of rings between the discs made of refractory metal are placed, with the blade-like shoulders being periodically arranged around their edges.
V.D. Yeryomka, V.P. Dzyuba
openaire +1 more source
Proceedings of the IRE, 1929
Asymmetric conductivity in a gas between two electrodes can be accomplished without the use of a hot cathode, if the relative areas of the electrodes are widely different. This paper presents the results of an investigation of the discharge phenomena and asymmetric conductivity in a cold cathode rectifier tube containing two anodes and one cathode ...
openaire +1 more source
Asymmetric conductivity in a gas between two electrodes can be accomplished without the use of a hot cathode, if the relative areas of the electrodes are widely different. This paper presents the results of an investigation of the discharge phenomena and asymmetric conductivity in a cold cathode rectifier tube containing two anodes and one cathode ...
openaire +1 more source
Nature, 1975
THE cold cathode arc, so called because of the very high current densities and low temperatures observed at the cathode, has been subjected to intensive theoretical and experimental study1–4. Many theories of the ‘cathode spot’ have been proposed, but distinguishing between them experimentally has proved to be a formidable task, because of the rapid ...
openaire +1 more source
THE cold cathode arc, so called because of the very high current densities and low temperatures observed at the cathode, has been subjected to intensive theoretical and experimental study1–4. Many theories of the ‘cathode spot’ have been proposed, but distinguishing between them experimentally has proved to be a formidable task, because of the rapid ...
openaire +1 more source
IEEE Transactions on Electron Devices, 1973
Cold cathode emission has been obtained from forward-biased silicon p-n junctions whose p-surfaces were activated to a state of negative electron affinity. In operation, electrons injected into the p-layer diffuse to the surface where they are emitted into vacuum. An Si:SiO 2 structure has been developed to overcome the problems associated with current
openaire +1 more source
Cold cathode emission has been obtained from forward-biased silicon p-n junctions whose p-surfaces were activated to a state of negative electron affinity. In operation, electrons injected into the p-layer diffuse to the surface where they are emitted into vacuum. An Si:SiO 2 structure has been developed to overcome the problems associated with current
openaire +1 more source
Abstracts. International Vacuum Electronics Conference 2000 (Cat. No.00EX392), 2002
Summary form only given. Application of cold cathode technology for use in crossed-field amplifiers (CFAs) has been limited by the characteristics of the materials, usually platinum (Pt) or beryllium (Be/BeO), used as the emitter. A case in point is the L-4717, used as the second stage amplifier (baby Amplitron) in the SPS-48-C/E transmitters.
K.F. Ramacher +2 more
openaire +1 more source
Summary form only given. Application of cold cathode technology for use in crossed-field amplifiers (CFAs) has been limited by the characteristics of the materials, usually platinum (Pt) or beryllium (Be/BeO), used as the emitter. A case in point is the L-4717, used as the second stage amplifier (baby Amplitron) in the SPS-48-C/E transmitters.
K.F. Ramacher +2 more
openaire +1 more source
Review of Scientific Instruments, 1970
A new gaseous discharge source has been developed for use in measurement of atomic and molecular electronic state lifetimes where the transitions occur in the range 1000–12 000 Å. The source is a coaxial aluminum cold cathode-anode device utilizing fast pulse circuits, magnetic field breakdown enhancement, and a flowing gas supply.
G. E. Copeland, R. G. Fowler
openaire +1 more source
A new gaseous discharge source has been developed for use in measurement of atomic and molecular electronic state lifetimes where the transitions occur in the range 1000–12 000 Å. The source is a coaxial aluminum cold cathode-anode device utilizing fast pulse circuits, magnetic field breakdown enhancement, and a flowing gas supply.
G. E. Copeland, R. G. Fowler
openaire +1 more source