IEEE Conference Record - Abstracts. 2002 IEEE International Conference on Plasma Science (Cat. No.02CH37340)
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Enhanced Raman scattering of a rippled laser beam in laser-plasma interaction
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Summary form only given, as follows. In the laser-plasma interaction experiments, self-focusing and filamentation affect quite a large number of other parametric processes including stimulated scattering processes. It has also been experimentally observed that SRS is more prone to the nonlinearly refraction-induced enhancement in the intensity of the filaments. This situation is qualitatively well......
#Raman scattering #Laser beams #Laser excitation #Laser modes #Particle beams #Electron beams #Plasma waves #Magnetic fields #Optical coupling #Optical refraction
Sheet shaped plasma production using microwave-plasma interaction with ECR region
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Summary form only given. To control the shape of high density plasma has been one of the issues for the application of plasma to industrial usages. Therefore, ECR plasma is a good candidate of a high density plasma. A sheet shaped high density plasma could be used to modify the surface of materials uniformly and as the basis for electron accelerators. The discharge parameters, such as ECR conditio......
#Production #Plasma density #Plasma accelerators #Plasma applications #Plasma materials processing #Plasma waves #Plasma measurements #Shape control #Magnetic field measurement #Industrial control
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
Effect of material strength models on numerical prediction of instability growth solids
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Summary form only given, as follows. Considerable research has been devoted to the subject of the instability phenomena that appear on material interfaces. While instability phenomena in perfect fluids and gases are reasonably well understood, the problem of characterizing these phenomena in real materials possessing strength, viscosity, compressibility or phase transitions remains an open questio......
#Solid modeling #Predictive models #Numerical models #Testing #Capacitive sensors #Temperature #Conducting materials #Numerical simulation #Gases #Viscosity
Time-resolved reflectivity and transmission measurements of a laser-heated ultrathin foil
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Summary form only given. Heating ultrathin foils with femtosecond laser pulses provides an experimental test ground for the study of high-energy density matter, in particular, for warm dense matter (WDM). Investigating the optical properties with high temporal and spatial resolution yields information about the AC conductivity of these nearly isochorically heated states. Theoretical predictions fo......
#Reflectivity #Ultrafast optics #Optical pulses #Pulse measurements #Testing #Wavelength division multiplexing #Conductivity #Plasma properties #Plasma measurements #Laser modes
Study of pulsed plasma doping by Langmuir probe diagnostics and ion mass-energy analyzer
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Summary form only given. Pulsed plasma diagnostics in a plasma doping system for semiconductor device fabrication have been carried out. Pulsed plasma was generated adjacent to the silicon wafer using pulsed biases. The source gases were BF/sub 3/ and N/sub 2/. An ion mass and energy analyzer was mounted with a small aperture open to the plasma. Bias voltages between 0 and -5.0 kV were applied to ......
#Plasma diagnostics #Plasma immersion ion implantation #Doping #Probes #Plasma density #Plasma temperature #Plasma measurements #Plasma sources #Plasma devices #Electron beams
High purity mode operation of a gyrotron
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Summary form only given, as follows. High frequency gyrotrons are characterized by their capacity to deliver high powers and their frequency step-tunability due to the alternation of the operating mode. Very often the gyrotron output needs to be converted into a Gaussian-like beam because the gyrotron generates radiation with TE/sub mn/ mode structure. High output mode purity is necessary for an e......
#Gyrotrons #Kilns #Insulation #Frequency #Power engineering and energy #Plasmas #Gaussian processes #High power microwave generation #Tellurium #Scattering
Atomic effects in the turbulent properties of microwave generated plasmas
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Summary form only given, as follows. Microwave plasmas are generated in helium, neon, argon, krypton, and xenon at various microwave powers and neutral gas pressures. A floating Langmuir double probe is employed to diagnose plasma electron density and temperature. Bias voltage and current characteristic curves are analyzed for the determination of electron temperature and density for all five gase......
#Plasma properties #Microwave generation #Plasma temperature #Plasma density #Plasma diagnostics #Gases #Electrons #Fluctuations #Power generation #Helium
LASNEX simulations of ETA-II and laser target experiments
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Summary form only given, as follows. In order to have confidence in the radiation converter target design for DARHT-II using LASNEX and our equation of state (EOS) for Ta, we need to compare the LASNEX simulations with experimental results from ETA-II and laser target experiments. ETA-II experiments include the following measurements: integrated line density, plasma expansion velocity, temperature......
#Plasma measurements #Plasma temperature #Plasma density #Plasma simulation #Optical design #Equations #Earth Observing System #Density measurement #Velocity measurement #Thermal expansion
Simulation of charged cooled trapped ions
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Summary form only given. Future aspects of science and technology in many fields such as physics, chemistry, material science, electronics, biology, medicine, etc. are characterized by miniaturization down to an atomic level. One promising method that offers such miniaturization is the ion beam manipulation technology. Over the years we have developed methods dealing with manipulation of ions in i......
#Biological system modeling #Medical simulation #Chemical technology #Materials science and technology #Atom optics #Biomedical optical imaging #Particle beam optics #Optical buffering #Temperature distribution #Electron traps