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Plasma-discharges using nanosecond repetitive high voltage pulses has been very effective for the stabilization of lean flame1. To explain the chemical mechanisms of active species production by pulsed discharges, a two-step mechanism was proposed to explain the production of high densities of atomic oxygen. This mechanism first creates excited electronic states of nitrogen, which then dissociate...
A two-dimensional particle-in-cell simulation has been developed to study density enhancement of capacitively coupled rf discharges with multi-slit electrodes. The observed density increase is shown to result from a hollow cathode effect that takes place within the multi-slit electrode configuration, which forms as a result of secondary electron emission due to ion bombardment. By investigating the...
In the interaction of high power laser beams with solid density plasma, there are a number of magnetic field generating mechanisms that result in very strong fields that can inhibit energy transport. Here, we present 2D numerical modeling of near critical density plasma using a fully implicit Vlasov-Fokker-Planck code, IMPACTA, which includes self-consistent magnetic fields as well as anisotropic...
The Field-Reversed Configuration Heating Experiment (FRCHX) is a collaborative experiment between the Air Force Research Laboratory (AFRL) and Los Alamos National Laboratory (LANL) to study high energy density laboratory plasma (HEDLP) phenomena, which encompass such topics as magneto-inertial fusion (MIF). In this experiment, field-reversed configuration (FRC) plasmas are formed via a reversed-field...
We have been conducting experiments at Arecibo, Puerto Rico and Gakona, Alaska to investigate naturally occurring and high power radio wave induced ionospheric plasma turbulence in the past two decades. Ionospheric turbulence can have a broad range of scale length from several hundred kilometers to centimeters. Zero-frequency modes associated with plasma density fluctuations (irregularities) are highly...
In the past few years cold atmospheric plasmas (CAPs) have proven their bactericidal, fungicidal and also sporicidal properties. One further challenge is the inactivation of viruses.
We have been conducting controlled studies of VLF whistler wave interactions with “inner” radiation belts at Arecibo, Puerto Rico and with “outer radiation belts” at Gakona, Alaska. Whistler waves at 40.75 kHz can be launched from a Naval transmitter code-named NAU at Arecibo, while HF amplitude-modulated electrojet current can radiate at selected VLF wave frequencies at Gakona, Alaska. A new technique...
Fast plasma heating in a multi-mirror magnetic trap by a high-current beam of relativistic electrons is a promising way to achieve fusion-grade plasma parameters. A high-level Langmuir turbulence develops during the beam-plasma interaction. These high-energy-density plasma oscillations can generate electromagnetic (EM) radiation in a wide frequency range extending from the plasma frequency to its...
The Field-Reversed Configuration Heating Experiment (FRCHX) is a collaborative experiment between the Air Force Research Laboratory (AFRL) and Los Alamos National Laboratory (LANL) to explore the physics of magneto-inertial fusion (MIF) and other high energy density laboratory plasma (HEDLP) phenomena. In the experiment, a plasma in a field-reversed configuration (FRC), with density 5 × 1016 ions/cm...
Creation of a burning plasma that is heated by α-particles created in fusion reactions, is of great importance for successful inertial fusion experiments. In order to model the initiation and propagation of a burn wave through the fusion fuel, it is vital to have a good understanding of the energetics involved. Only through correct modeling can improvements in experiment including ignition and sufficient...
Calabazas Creek Research, Inc. (CCR) is continuing research on controlled porosity reservoir (CPR) cathodes1. In addition to thermionic dispenser cathodes, CCR is teamed with the Institute for Research in Electronics and Applied Physics (IREAP) at the University of Maryland to apply this technology to cesiated dispenser photocathodes. CPR technology provides increased emission uniformity with longer...
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