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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...
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...
The goal of the Field-Reversed Configuration Heating Experiment (FRCHX) is to demonstrate magnetized plasma compression and thereby provide a low cost approach to high energy density laboratory plasma (HEDLP) studies, which include such topics as magneto-inertial fusion (MIF). A requirement for the field-reversed configuration (FRC) plasma is that the trapped flux in the FRC must maintain confinement...
Summary form only given. Over the next three to five years, Los Alamos National Laboratory (LANL) and the U. S. Air Force Research Laboratory (AFRL) will form, translate, capture, and compress a field reversed configuration (FRC) of magnetized deuterium plasma using an imploding solid liner to achieve magnetic fields more than a million times that of the Earth and plasma pressures of one million atmospheres...
Summary form only given. In the University of Nevada Reno Megagauss Experiment small rods with diameters near 1 mm were driven by the Zebra pulser resulting in a current pulse that rises to a peak just over 930 kA in 160 ns. A green filtered photodiode in an experiment with a 1 mm diameter aluminum rod shows a strong signal rising at about 100 ns on this same time scale when the current is near 450...
Summary form only given. In experiments at the Air Force Research Laboratory to form, translate, and compress a field reversed plasma configuration (FRC) with an imploding liner, the liner will compress a near-vacuum field to megagauss levels. In our magnetohydrodynamic (MHD) simulations of the full experiment to date we have used insufficient resolution to address the possibility of plasma formation...
A variety of plasma diagnostics will be fielded in experiments at the Air Force Research Laboratory to form, translate, and compress a field reversed plasma configuration (FRC) with an imploding liner over the next three to five years. Information from those diagnostics will be valuable in determining and remedying the causes of suboptimal performance. In order to lay the groundwork for post-shot...
Summary form only given. In experiments at the Air Force Research Laboratory to form, translate, and compress a field reversed plasma configuration (FRC), the initial plasma is formed by driving the main theta coil with a one-quarter MHz current pulse. In our magnetohydrodynamic (MHD) simulations of the full experiment to date we have assumed an initially uniform density, 1 eV plasma with an embedded...
Summary form only given. Three types of experiments developing FRC formation, injection, and compression are described: field-compression, FRC formation-translation-capture, and FRC formation- translation-capture-compression. All involve the generation of primarily axial guide and mirror magnetic fields with ~2 Tesla peak fields, using ~5 ms rise time discharges into 9 pulsed magnet coils surrounding...
Summary form only given. We present and overview the experimental high density Field Reversed Configurationi (FRC) approach for application to a physics demonstration of magnetized target fusion (MTF). This MT target plasma continues to be developed at the Los Alamos FRC experiment FRXL. The first translated FRXL FRC data will be shown, where the translation speeds exceed 15cm/usec, which yields a...
Magnetized target fusion (MTF) is a means to compress plasmas to fusion conditions that uses magnetic fields to greatly reduce electron thermal conduction, thereby greatly reducing compression power density requirements. The compression is achieved by imploding the boundary, a metal shell. This effort pursues formation of the field-reversed configuration (FRC) type of magnetized plasma, and implosion...
Summary form only given. Compression of a field reversed configuration of plasma and magnetic field by a near-solid liner is an attractive path to fusion. We have previously developed the capability to model the formation and translation of an FRC into an imploding liner that subsequently compresses the magneto-plasma to fusion conditions aided by the magnetic inhibition of the thermal conduction...
Magnetized Target Fusion (MTF) is a means to compress plasmas to fusion conditions that uses magnetic fields to greatly reduce electron thermal conduction, thereby greatly reducing compression power density requirements (1,2). The compression is achieved by imploding the boundary, a metal shell. This effort pursues formation of the Field Reversed Configuration (FRC) type of magnetized plasma, and...
Compression of a field-reversed configuration (FRC) by an imploding solid liner is a possible path to magnetized target fusion. It is critical to the success of such experiments to perform full-up multidimensional computational simulations of them. However, there are numerous difficulties in performing those simulations. The interacting physical processes involved introduce disparate time scales....
Summary form only given. We have performed 3-D, resistive, magnetohydrodynamic (MHD) simulations with MACH3 of argon gas-puff Z-pinches inside an array of 12 current return posts from realistic initial conditions using a collisional radiative equilibrium (CRE) model to predict K-shell and L-shell radiation output. Initial gas puff conditions, including densities, temperatures, and velocities were...
We obtained full axial coverage radiography of a deformable contact imploding liner. This radiographic data indicates the feasibility of using a varying thickness in a long cylindrical solid liner, driven as a 12 megamp Z-pinch, to achieve factor- 16 cylindrical convergence, while using 8 cm diameter aperture electrodes. The Al liner was 30 cm long, with 9.78 cm inner diameter for its full length,...
Summary form only given. In order to implode enough mass to the high specific energies necessary to produce K-shell emission from high Z elements like krypton, large-diameter Z-pinch loads will be required for short current rise time machines, like Z and ZR. For long pulse rise time machines, such as Decade Quad, large diameters are needed for the same reason and, in addition, they are needed to effectively...
Summary form only given. Hollandsworth, et al., describe experiments in which current pulses of hundreds of kiloamps tens of microsecond in duration are passed through half-centimeter diameter rods of various metals with step variations in radius. We have performed two-dimensional MHD simulations of these experiments using MACH2. The simulations include elastic-plastic effects; diffusion of magnetic...
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