Results 211 to 220 of about 6,836 (265)
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Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1999
A new type of plasma sputtering device, named the hollow cathode magnetron (HCM), has been developed by surrounding a planar magnetron cathode with a hollow cathode structure. Operating characteristics of HCMs, current–voltage (I–V) curves for fixed discharge pressure and voltage–pressure (V–p) curves for fixed cathode current, are measured.
Zhehui Wang, Samuel A. Cohen
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A new type of plasma sputtering device, named the hollow cathode magnetron (HCM), has been developed by surrounding a planar magnetron cathode with a hollow cathode structure. Operating characteristics of HCMs, current–voltage (I–V) curves for fixed discharge pressure and voltage–pressure (V–p) curves for fixed cathode current, are measured.
Zhehui Wang, Samuel A. Cohen
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Hollow Cathode Discharge with Thermionic Cathodes
Journal of Applied Physics, 1971The electrical and visual characteristics of a dc hollow cathode discharge with indirectly heated thermionic cathodes were obtained in argon at a few Torr. Two facing planar cathodes of variable separation form the hollow cathode geometry. A hollow cathode effect was observed in the ``ball-of-fire'' mode and in the ``low-voltage arc'' mode. The results
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1993
Pioneering observations on the luminescent phenomena generated in evacuated tubes belong to the history of spectroscopy and date as far back as the mid-1800s.(1,2) Within this field of research, the first description of a hollow cathode discharge (HCD) published in the scientific literature can be found in the early years of this century, when a German
Sergio Caroli, Oreste Senofonte
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Pioneering observations on the luminescent phenomena generated in evacuated tubes belong to the history of spectroscopy and date as far back as the mid-1800s.(1,2) Within this field of research, the first description of a hollow cathode discharge (HCD) published in the scientific literature can be found in the early years of this century, when a German
Sergio Caroli, Oreste Senofonte
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Cathode Sputtering in Hollow Cathode Discharges
Journal of the Physical Society of Japan, 1962In order to investigate the processes responsible for a negative resistance of the hollow cathode discharge, several discharge parameters are measured with a Langmuir probe. The vapor density distributions of the sputtered cathode metal are measured by the absorption method of the resonance radiation of the metal atom. Almost all the metal atoms in the
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Collisionless instability of the cathode sheath in a hollow-cathode discharge
Physical Review Letters, 1993High-intensity periodic variations of the potential fall across the cathode sheath are observed in a low-pressure magnetic-field-free hollow-cathode discharge. These potential variations cause modulation of the discharge current, reaching a depth of almost 100%.
, Arbel +4 more
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Note: Coaxial-heater hollow cathode
Review of Scientific Instruments, 2017The design and tests of a LaB6 hollow cathode with a novel heater are presented. In the new design, the heater wire is completely encapsulated around the cathode tube and a coaxial return electrode, thereby eliminating hot spots on the heater wire due to the free hanging regions. Since the new heater confines the Joule heating to the region of interest,
Huseyin, Kurt +3 more
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Hollow cathode effects in charge development processes in transient hollow cathode discharges
IEEE Transactions on Plasma Science, 1995A detailed experimental study of space charge formation and ionization growth in transient hollow cathode discharges (THCD) is presented. The experiment was performed with an applied step voltage up to 30 kV, with rise time less than 50 ns. The discharge was operated in different gases, at pressures in the range 50-750 mTorr, with cathode apertures ...
M. Favre +6 more
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Compact lanthanum hexaboride hollow cathode
Review of Scientific Instruments, 2010A compact lanthanum hexaboride hollow cathode has been developed for space applications where size and mass are important and research and industrial applications where access for implementation might be limited. The cathode design features a refractory metal cathode tube that is easily manufactured, mechanically captured orifice and end plates to ...
Dan M, Goebel, Ronald M, Watkins
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Observations of hollow cathode light emission from a transient hollow cathode discharge
Applied Physics Letters, 1991Experimental observations are presented on the light emission from the hollow cathode region of a pulsed hollow cathode discharge. A 2 mJ, 30 ns, 1.06 μm laser pulse incident on the back of the cathode is used to trigger the discharge. The temporal evolution of the light emission from this region is recorded in 50 nm spectral bands.
WYNDHAM, E +3 more
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Centrospazio Progress on MPDT Hollow Cathodes
40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2004The paper deals with Alta-Centrospazio progress in the frame of the numerical activity on high-current hollow cathodes for MPD thrusters applications, started about three years ago with the development of a stationary, one-dimension single-channel hollow cathode model.
ROSSETTI P. +3 more
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