Results 261 to 270 of about 187,352 (298)
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Microwave-Thawed Plasma for Cryoprecipitate Production
Vox Sanguinis, 1985Abstract. A microwave oven has been used to obtain rapid and controlled thawing of frozen plasma packs for cryoprecipitate production. The resulting factor VIII yields were higher than the average of 77.8 IU (in a volume of 17.2 ml) obtained by the slow overnight thaw procedures in routine use. Assays on 10 individual packs showed mean results of 142 ±
H, Bass, P M, Trenchard, M J, Mustow
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PTGMTT National Symposium Digest, 2005
Since the inception of modern plasma research, microwaves have played an important role. It has first served as a diagnostic tool to determine such properties of the plasma as electron density, collision frequency and electron temperature. Second the plasma with an applied magnetic field has served as a medium with interesting propagation properties ...
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Since the inception of modern plasma research, microwaves have played an important role. It has first served as a diagnostic tool to determine such properties of the plasma as electron density, collision frequency and electron temperature. Second the plasma with an applied magnetic field has served as a medium with interesting propagation properties ...
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Laser air plasma expansion by microwaves
Applied Optics, 2023Utilizing microlasers and microwaves, our study examined the impact of microwaves on the expansion of air plasma. We applied microwaves to the air plasma generated by a microlaser, visualized its growth using a phone camera, and recorded plasma emissions using a high-resolution spectrometer.
Yuji Ikeda +3 more
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Journal of Applied Physics, 1965
Transmission characteristics of a rectangular waveguide with a perpendicularly inserted mercury-vapor discharge tube, have been measured. The waveguide was excited in the TE01 mode and the plasma column was either perpendicular or parallel to the electric vector of the waveguide mode.
B. Keržar, P. Weissglas
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Transmission characteristics of a rectangular waveguide with a perpendicularly inserted mercury-vapor discharge tube, have been measured. The waveguide was excited in the TE01 mode and the plasma column was either perpendicular or parallel to the electric vector of the waveguide mode.
B. Keržar, P. Weissglas
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IET Conference on High Power RF Technologies, 2009
A technique has been developed for melting holes in masonry as an alternative to conventional drilling. Microwaves are applied to a tungsten rod inside a section of waveguide, which is terminated by a short circuit. The rod protrudes from the waveguide, via a small hole, and is placed against the masonry to be drilled.
S.R. Wylie, A.I. Al-Shamma'a, A. Shaw
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A technique has been developed for melting holes in masonry as an alternative to conventional drilling. Microwaves are applied to a tungsten rod inside a section of waveguide, which is terminated by a short circuit. The rod protrudes from the waveguide, via a small hole, and is placed against the masonry to be drilled.
S.R. Wylie, A.I. Al-Shamma'a, A. Shaw
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1966 International Electron Devices Meeting, 1966
A low-loss, low-noise plasma varactor has been developed. This is a variable microwave reactance produced by means of a low pressure, highly efficient gas discharge. This device compares favorably with ferrite or semiconductor devices as far as rf losses and average rf power handling capability are concerned. A low-loss phase shifter has been developed
J.Y. Wada, R.C. Knechtli, B.J. Forman
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A low-loss, low-noise plasma varactor has been developed. This is a variable microwave reactance produced by means of a low pressure, highly efficient gas discharge. This device compares favorably with ferrite or semiconductor devices as far as rf losses and average rf power handling capability are concerned. A low-loss phase shifter has been developed
J.Y. Wada, R.C. Knechtli, B.J. Forman
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Microwave Diagnostics of Plasmas
IEEE Transactions on Nuclear Science, 1964The theory of wave propagation in plasma media where temperature and collision effects are important is formulated by combining the wave equation and Boltzmann's equation for average electron velocity. Usually it is assumed that the electron collision frequency is independent of velocity, but most gases are characterized by a velocity-dependent ...
R. W. Grow, C. C. Johnson, A. S. Jones
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Physics World, 1988
A plasma of easily-attained parameters could be used as a phase-conjugate reflector for subcentimetre electromagnetic (EM) waves, according to I. Nebenzahl of the Hebrew University, Jerusalem and colleagues at the University of California, Irvine (Phys.Fluids. 31 2144).
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A plasma of easily-attained parameters could be used as a phase-conjugate reflector for subcentimetre electromagnetic (EM) waves, according to I. Nebenzahl of the Hebrew University, Jerusalem and colleagues at the University of California, Irvine (Phys.Fluids. 31 2144).
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Nature, 1962
A striated r-f discharge in argon was produced by highpower, continuous- wave, 3.4-cm wavelength radiation focused into the central region of a discharge vessel. The conditions are approximates 2 kw source power and 40 to 100 mm Hg argon pressure, and the effects of varying the power and pressure are described. (D.L.C.)
J. ALLISON, A. L. CULLEN, A. ZÁVODY
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A striated r-f discharge in argon was produced by highpower, continuous- wave, 3.4-cm wavelength radiation focused into the central region of a discharge vessel. The conditions are approximates 2 kw source power and 40 to 100 mm Hg argon pressure, and the effects of varying the power and pressure are described. (D.L.C.)
J. ALLISON, A. L. CULLEN, A. ZÁVODY
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Measurements of plasma potential in high-pressure microwave plasmas
Review of Scientific Instruments, 2009Plasma potential of a high-pressure (∼1 Torr) microwave-generated argon plasma is measured using a Langmuir probe and a cold emissive probe. The operation of a hot emissive probe in a high-pressure plasma has been very difficult due to frequent burn-outs and significantly reduced lifetime of the probe filament, which, in turn, limits the possibility of
A V, Tarasova +2 more
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