Results 151 to 160 of about 314 (212)
Carbon Neutralization, Volume 5, Issue 5, September 2026.The valorization of CH4 toward carbon neutralization and energy sustainability: transforming global emissions into high‐–value products via mild catalytic strategies. ABSTRACT The direct conversion of methane into value‐added chemicals under mild conditions offers a sustainable pathway to utilize this abundant hydrocarbon feedstock and mitigate ...
Hengchi Liu +7 more
wiley +1 more source
Carbon Neutralization, Volume 5, Issue 5, September 2026.Trace high‐entropy doping is integrated with spray‐drying to construct sodium iron sulfate microspheres with accelerated charge and mass transfer. The doped cathode exhibits narrowed band gaps, reduced sodium diffusion barriers, stable cathode interphases, and improved tolerance to low‐temperature operation and humid‐air exposure, enabling scalable ...
Fei Wang +10 more
wiley +1 more source
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IEEE Conference Record - Abstracts. 1997 IEEE International Conference on Plasma Science, 2002
Summary form only given. Substantial progress has been made in understanding the physics of diamond cold cathodes. Four distinct regions: the metal contact, bulk diamond, vacuum interface, and free space, exhibit distinct physical processes affecting the behaviour of the cathode.
M.W. Geis +4 more
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Summary form only given. Substantial progress has been made in understanding the physics of diamond cold cathodes. Four distinct regions: the metal contact, bulk diamond, vacuum interface, and free space, exhibit distinct physical processes affecting the behaviour of the cathode.
M.W. Geis +4 more
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Proceedings of IEEE/Cornell Conference on Advanced Concepts in High Speed Semiconductor Devices and Circuits, 2002
There is a great need for electron sources for a variety of applications, such as klystrons, traveling wave tubes (TWTs), planar panel displays, vacuum triodes, etc.. The cold cathode electron emitters under investigation currently can be basically divided into two types: field emitters and planar emitters.
U.K. Mishra, null Wei-Nan Jiang
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There is a great need for electron sources for a variety of applications, such as klystrons, traveling wave tubes (TWTs), planar panel displays, vacuum triodes, etc.. The cold cathode electron emitters under investigation currently can be basically divided into two types: field emitters and planar emitters.
U.K. Mishra, null Wei-Nan Jiang
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IEEE Electron Device Letters, 1991
Diamond cold cathodes have been formed by fabricating mesa-etched diodes using carbon ion implantation into p-type diamond substrates. When these diodes are forward biased, current is emitted into vacuum. The cathode efficiency (emitted current divided by diode current) varies from 2*10/sup -4/ to 1*10/sup -10/ and increases with the addition of 10/sup
M.W. Geis +6 more
openaire +1 more source
Diamond cold cathodes have been formed by fabricating mesa-etched diodes using carbon ion implantation into p-type diamond substrates. When these diodes are forward biased, current is emitted into vacuum. The cathode efficiency (emitted current divided by diode current) varies from 2*10/sup -4/ to 1*10/sup -10/ and increases with the addition of 10/sup
M.W. Geis +6 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
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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
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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
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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
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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
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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
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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
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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
Microtips cathode for ignition of cold cathode gauges
Vacuum, 1997A novel device used for ignition of Penning gauges is described. It is based on electron emission by a field effect microtips cathode. The complete reliability of the device is demonstrated.
R Baptist, F Bachelet
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