IEEE Conference Record - Abstracts. 2002 IEEE International Conference on Plasma Science (Cat. No.02CH37340)
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Quantum extension of Child-Langmuir law
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Summary form only given, as follows. In the advent fields of nano-technology, electrode gaps with scales down to nanometer regime can be fabricated. On such a nano scale, quantum effects such as electron tunneling and the electron exclusion principle become important in the study of beam-gap interaction. We extend the classical Child-Langmuir law into the quantum regime including the effects of el......
#Electrodes #Electron beams #Tunneling #Voltage #Plasmas #Equations #Current density #Matter waves #Solid modeling #Geometry
Electron density and electron temperature in argon microhollow cathode discharges
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Summary form only given, as follows. Direct current microhollow cathode discharges (MHCDs) operated in noble gases and in mixtures of rare gases and halides have been shown to emit excimer radiation with efficiency in the 0.5-10% range. Even higher values in efficiency have been obtained (20% in xenon) when the discharge was pulsed with 20 ns pulses. These relatively high values indicate a substan......
#Argon #Cathodes #Plasma temperature #Plasma measurements #Gases #Density measurement #Hydrogen #Electron emission #Xenon #Atomic measurements
Study of high energy storage Blumlein transmission lines as high power microwave drivers
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Summary form only given. The evolution of high power microwave (HIPM) sources as practical systems requires the development of compact, portable, reusable, pulsed power systems. One approach to pursuing this objective is to utilize parallel-stacked Blumlein transmission lines energized using a compact Marx generator. Such a configuration would be capable of driving low impedance HPM sources with a......
#Energy storage #Power transmission lines #Pulse power systems #Electric breakdown #High power microwave generation #Impedance #Dielectric breakdown #Dielectric materials #Dielectric substrates #Computational geometry
X-ray streak spectroscopy of Z-pinch K-shell mass dynamics
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Summary form only given, as follows. We have made streaked spectroscopy measurements of K-shell x-ray emission at the SNL/Albuquerque Z facility for both nested Ni wire arrays and Ar double-shell gas puffs. By doping either of the wire arrays or gas puff shells with a different tracer, Cr or Mn in the case of the wire arrays and Cl for the gas puffs, we can determine when the mass from each is rad......
#Mass spectroscopy #Physics #Contracts #History #Wire #Circuits
New microwave plasma sources for large scale applications up to atmospheric pressure
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Summary form only given, as follows. Plasma technology is used in a wide field of applications for example for PECD-deposition, activation and etching. In particular microwave enhanced plasmas are very effective for activation of surfaces. Our objective targets are to construct plasma sources for large area application and plasma sources which can be used in a wide pressure regime as possible up t......
#Plasma sources #Large-scale systems #Plasma density #Plasma applications #Plasma waves #Plasma materials processing #Plasma devices #Plasma accelerators #Plasma measurements #Microwave devices
Design and performance of a current transformer for efficient liner implosions
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Summary form only given. Proton radiography offers several advantages in the analysis of convergent geometry hydrodynamic experiments when compared to the more usual flash X-ray radiography and laser shadowgraphy. However, such an experiment must be fielded at the proton beam line source. This requirement places severe constraints on the size and thus the efficiency of an electrical pulsed power d......
#Current transformers #Pulse transformers #Capacitors #Radiography #X-ray lasers #Inductance #Protons #Geometrical optics #Hydrodynamics #Particle beams
Structures of microwave tunnel kiln
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Summary form only given. The electric field is uniform in the tunnel. The kiln has a blanket with double layer thermal insulation. Varying the thermal insulator can create the temperature gradient. The inner layer is made of mulite base cement. The loss tangent of it is the order of 10/sup -2/ which is equivalent to the work pieces. The microwave reflects on the metallic wall of the tunnel repeate......
#Kilns #Insulation #Temperature #Ceramics #Silicon compounds #Steel #Magnetic field measurement #Isolators #Fans #Microwave antenna arrays
Dielectric Cherenkov maser with a magnetically confined plasma column in a dielectric rod slow-wave waveguide
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Summary form only given. Dielectric Cherenkov maser with a plasma column, an axial dielectric rod and a thin annular relativistic electron beam (TAREB) is studied in the presence of external magnetic field. The dispersion equations of the beam-wave interaction are derived. The growth rates of the wave are obtained, and the effects of the accelerating voltage, beam current and the background plasma......
#Dielectrics #Magnetic confinement #Plasma confinement #Masers #Plasma waves #Plasma accelerators #Electron beams #Magnetic fields #Equations #Acceleration
AC conductivity of warm dense aluminum
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Summary form only given, as follows. The AC conductivity of aluminum in the warm dense matter regime of several electron-volts and solid density is of particular interest because of its proximity to the predicted region of conductivity minimum. In this paper, we will describe the first determination of AC conductivity of a well defined, single plasma state using measured values of reflectivity and......
#Conductivity #Aluminum
Modeling of discharges in atmospheric-pressure air sustained by travelling electromagnetic waves
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Summary form only given, as follows. Results are presented of simulation of atmospheric-pressure air discharges sustained by electromagnetic surface waves propagating along discharge tubes. The discharge model is developed with account of nonequilibrium effects. Number densities of charged and neutral plasma species are obtained by solving the system of kinetic equations, with rate constants depen......
#Atmospheric modeling #Electromagnetic modeling #Atmospheric waves #Electromagnetic scattering #Plasma temperature #Equations #Electromagnetic propagation #Plasma waves #Temperature dependence #Temperature distribution