Results 241 to 250 of about 4,811,794 (288)

A plasma cathode for a radio-frequency gun

Instruments and Experimental Techniques, 2008
A plasma ferroelectric cathode is used to form electron beams with a high pulse charge and a high charge in an electron bunch in an rf electron gun of a 10-cm wavelength range. The design of the cathode is described, and the results of calculations of the densities of the cathode-emitted and the gun-outputted currents are presented.
V. A. Kushnir, I. V. Khodak
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A tandem radio-frequency plasma torch

Journal of Applied Physics, 1988
The flow and temperature fields in a tandem radio-frequency (rf) plasma torch were calculated. The method employed here is based on our previous rf plasma model. The flow and temperature fields of this tandem plasma show similar features to those of a dc-rf hybrid plasma, and the carrier gas can be injected into the high-temperature region (∼9000 °C ...
Takashi Uesugi, Osamu Nakamura, Toyonobu Yoshida, Kazuo Akashi   +3 more
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The Radio-Frequency Confinement and Acceleration of Plasmas

1967
Publisher Summary This chapter focuses on the radio-frequency (rf) confinement and acceleration of plasmas. In 1956, the Soviet physicist Veksler pointed out that the force exerted on plasma by an rf electromagnetic field could be quite substantial.
H. Motz, C.J.H. Watson
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Plasma parameters of a radio frequency discharge

Review of Scientific Instruments, 1990
A low-frequency (100 kHz) radio frequency discharge has been characterized by making time-resolved measurements of the basic plasma parameters, including the electron energy-distribution function. Measurements obtained when operating with H2, D2, and Ar are compared.
C. A. Anderson, M. B. Hopkins, W. G. Graham   +2 more
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LiNbO3 exposed to radio-frequency plasma

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1998
Abstract Radio-frequency (27.12 MHz) glow discharge in H 2 and O, have been used for surface modification of LiNbO 3 wafers. The properties of plasma modified surface layers were dependent on the gas pressure and radio frequency (RF) input power. At pressures below 1 Torr of H 2 and input powers of 1–10 W/cm 3 , a low-resistance layer was created
H Turcicova, J Vacik, J Cervena, V Perina, M Polcarova, J Bradler, V Zelezny, J Zemek   +7 more
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[The effect of uvulopalatopharyngoplasty by radio frequency plasma].

Lin chuang er bi yan hou tou jing wai ke za zhi = Journal of clinical otorhinolaryngology head and neck surgery, 2011
To study the effect of uvulopalatopharyngoplasty(UPPP) by using radio frequency plasma on obstructive sleep apnea-hypopnea syndrome(OSAHS) with velopharyngeal obstruction.Eighty-one cases that were diagnosed as OSAHS with Velopharyngeal obstruction were randomized into two groups, UPPP group and radio frequency plasma Uvulopalatopharyngoplasty group ...
Mengling, Wei, Lingbo, Li, Huanhua, Qin
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Plasma Resonance in a Radio-Frequency Probe

Physical Review Letters, 1960
When the frequency of a low-voltage r-f signal superposed on a probe was swept within an adequate frequency range, the d-c component of the electron current due to the nonlinearity of the sheath impedance was measured. lt was found that a resonant increase appeared in the current at the electron plasma frequency, omega /sub p/ = (4 pi N/sub 0/e/sup 2/m)
K. Takayama, H. Ikegami, S. Miyazaki
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Radio‐Frequency Plasma Spraying of Ceramics

Journal of the American Ceramic Society, 1989
This study was aimed at developing a novel spraying process using a radio‐frequency (rf) plasma. Experiments of Al 2 O 3 and ZrO 2 –8 wt% Y 2 O 3
Tomohisa Okada, Hideki Hamatani, Toyonobu Yoshida   +2 more
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Effects of radio frequency waves on plasmas

Radiation Effects and Defects in Solids, 2013
The interaction of radio frequency waves as it propagates through a plasma medium – has fascinated the plasma physicists for decades. The ionosphere is crucial for radio wave propagation.
J.J. Martinell, S. Sen, G. Vahala
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Radio-frequency heating of fusion plasmas

1998
VTT Energy co-ordinates the national FFUSION research programme and the Finnish activities in the European fusion programme. Finnish fusion research was integrated into the European programme by the contract of association between Tekes and Euratom, which defines the research areas of the Association Euratom-Tekes.
Heikkinen, Jukka, Karttunen, Seppo, Pättikangas, Timo   +3 more
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