Measurement of the Polarization of the Radiation Reflected Backward From a Laser-Heated Plasma

Zaritskii, A. R.; Zakharov, Stanisłav D.; Kryukov, P. G.; Fedosimov, A I

doi:10.1070/qe1972v002n02abeh004407

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…Subsequent developments employed the principles of nonuniform and time-varying electric fields to trap particles using a wide variety of electrode configurations, including hyperboloidal endcaps above and below a hyperbolic ring (Wuerker et al, 1959a;Davis and Ray, 1980), spherical end electrodes inside a cylinder (Berg et al, 1970), spherical-void electrodes (Arnold and Folan, 1987), and ring-shaped electrodes in various arrangements (Berg et al, 1970;Weiss-Wrana, 1983;Davis et al, 1990;Ray et al, 1991). Of special interest to the evolution of our system is the cubic design developed initiafly by Wuerker et al (1959b) and later by Zaritskii et al (1971). Separate alternating (AC) voltages from a three-phase power supply were applied to the three pairs of opposing faces of the cell.…”

Section: Lamb Et Almentioning

confidence: 99%

The Environmental Control of Individual Aqueous Particles in a Cubic Electrodynamic Levitation System

Lamb

Moyle

Brune

1996

Aerosol Science and Technology

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ABSTRACT. The experimental investigation of aerosol particles often requires special apparatus to ensure that the walls of the system interfere minimally with the measurements. Electrodynamic levitation offers an attractive approach because the particle, when suitably charged, is held away from the system walls by time-dependent electric fields. A new electrodynamic levitation system has been developed expressly for investigating aqueous particles in controlled gaseous environments. A cubic cell was used in conjunction with the carefully controlled introduction of gas into the cell to form a wall-less flow reactor that is ideal for thermodynamic and kinetic studies involving reactive reagents. Unlike most previous cell configurations, the cubic geometry permits three-axis position control of the particle and an ability to measure the gravitational and drag forces simultaneously and independently when the gas flow is horizontally aligned. Preliminary results at room temperature of the mass gained by salt and sulfuric acid particles exposed to various humidities show the basic characteristics of the cell. New results with sulfuric acid particles exposed simultaneously to the vapors of water and nitric acid show that nonvolatile and volatile solutes cause aqueous particles to behave in qualitatively differentways. Such results confirm that cloud formation in the atmosphere should be enhanced by the presence of soluble trace gases under suitably low-temperature conditions.

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Section: Lamb Et Almentioning

confidence: 99%

The Environmental Control of Individual Aqueous Particles in a Cubic Electrodynamic Levitation System

Lamb

Moyle

Brune

1996

Aerosol Science and Technology

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“…The required two-phase source has a phase difference of 60°and an amplitude of 1.73 times the amplitude of the equivalent three-phase source. Note that this arrangement is not equivalent to removing one phase of a conventional three-phase ac drive as described by Zaritskii et al 15 A convenient means of generating the ac drive signals for the levitation trap is to employ a variable frequency electronic oscillator with quadrature outputs. These quadrature outputs may be combined algebraically to produce the desired 60°signals.…”

Section: Electrical Considerationsmentioning

confidence: 99%

Cubic electrodynamic levitation trap with transparent electrodes

Allison

Kendall

1996

Review of Scientific Instruments

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An unconventional electrodynamic suspension system with transparent planar electrodes is described which stably levitates charged solid particles or liquid droplets without the need for feedback control. The system has been used with particles ranging from about 1 to 100 m diam, under vacuum and within stationary and flowing gases. Operation within low conductivity liquids is possible in principle. The suspension system consists of six transparent conducting electrodes arranged as faces of a hollow cube. Four of these electrodes are driven by a variable-frequency two-phase ac source operating in the low audio frequency range. Advantages of this type of trap for aerosol studies include relatively wide-angle optical access and a geometry naturally suited to the use of three-axis dc crossfields for particle manipulation. Conditions for stable levitation are reviewed as well as methods for determining the radius, mass, charge, and density of a spherical levitated object.

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Measurement of the Polarization of the Radiation Reflected Backward From a Laser-Heated Plasma

Cited by 2 publications

References 1 publication

The Environmental Control of Individual Aqueous Particles in a Cubic Electrodynamic Levitation System

The Environmental Control of Individual Aqueous Particles in a Cubic Electrodynamic Levitation System

Cubic electrodynamic levitation trap with transparent electrodes

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