Losses of a thermonuclear plasma imploded by a high-velocity wall

Rioux, C.; Jablon, C.

doi:10.1088/0029-5515/15/3/008

Cited by 17 publications

(12 citation statements)

References 15 publications

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“…Our model therefore describes the energy dynamics of the inner hot core, when it exists. The preceding study [1] has shown that such a core can be maintained with a sufficiently rapid liner, a sufficiently high magnetic field, provided that the experiment stays away from the radiative regime v/here bremsstrahlung losses become excessive. This last condition is written as…”

Section: As In Refmentioning

confidence: 96%

“…[l], we study the implosion of a weakly magnetized dense plasma (j3» 1, n~10 m" , T~ 100 eV) by a rapidly moving liner (v~20 km-s' 1 )…”

Section: As In Refmentioning

confidence: 99%

“…It has been shown [1] that thermonuclear temperatures can be reached by the implosion of a pre-heated plasma by a rapidly moving cylinder, provided that thermal conduction losses are cut down by a relatively small axial magnetic field ( $ » 1), and the initial density and evolution time are chosen so that bremsstrahlung radiation losses remain small. Implosion speeds of the order of 20 km-s" 1 are necessary for such a scheme, and can be reached by electromagnetic acceleration, with eventual ablation through Joule heating [2], At the end of the compression, a regime is then reached where the temperatures of the ions and the electrons are expected to decouple from each other; a one-temperature model is, therefore, not appropriate for an estimate of the thermonuclear energy production of such experiments. Here we report results using a very simple threetemperature model, neglecting diffusion and radial dependence phenomena (which were treated in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Thermonuclear energy production of a cylindrical plasma imploded by a heavy liner

Jablon

Rioux

1976

Nucl. Fusion

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The production of thermonuclear energy by the adiabatic compression of a ß ≫ 1-dense plasma by a cylindrical heavy liner is investigated. Energy yields and compression ratios are optimized as functions of the initial conditions (plasma temperature and nτ-product, liner inertia). D-T α-self–heating is computed by dividing the α-population into a Maxwellian cold part and a flat hot part. High-energy amplification requires α-self-heating and stability of the liner-plasma interface well after the turn-around time.

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Section: As In Refmentioning

confidence: 96%

“…[l], we study the implosion of a weakly magnetized dense plasma (j3» 1, n~10 m" , T~ 100 eV) by a rapidly moving liner (v~20 km-s' 1 )…”

Section: As In Refmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermonuclear energy production of a cylindrical plasma imploded by a heavy liner

Jablon

Rioux

1976

Nucl. Fusion

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“…[2][3][4] Because of the small gain of MTF, the author had suggested to use MTF as a booster stage for the ignition of second high gain inertial confinement fusion targets. 5 In Thio et al 's new approach towards MTF, a quasispherical array of plasma jets is focused onto a small volume into which the magnetized deuterium-tritium ͑DT͒ fusion target is placed.…”

Section: Introductionmentioning

confidence: 99%

Plasma gun supersonic vortex magnetohydrodynamic dynamo for magnetized target fusion

Winterberg

2004

Physics of Plasmas

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Supersonic plasma jets injected with a large azimuthal velocity component into a magnetic cusp field entrap the radial field component in between the coalescing jets, with the cushioning effect of the magnetic field diminishing the formation of shocks which otherwise would occur by the collision of the jets. With the bending of the radial magnetic lines of force into an azimuthal direction by the vortex flow of the coalescing jets, a magnetohydrodynamic dynamo with an axial current is established. With the radial velocity component of the jets compressing the magnetic field and the plasma formed by the coalescing jets, a closed field line configuration is established. If dense denterium–tritium (DT) gas is injected into the vortex core, the axial current passes through the DT resulting in a dense pinch discharge stabilized by the rapidly rotating vortex flow.

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“…II-l, fresh liner/leads assemblies [1] coming from a refabrication facility (not shown) are transported to the FLR core as spent liner/leads assemblies [2], and are removed for reprocessing by the rotating liner manipulator [3]. A liner/leads assembly is inserted through a port in the blast-containment header, and the plasma source and the connector module for the energy transfer and storage (ETS) system [4], which is attached to the external ETS leads arm [5J, is moved into place [6l The liner/leads assembly is clamped to the containment vessel by a latching assembly [7]. The M50-MJ power supply consists of a bank of homopolar generators [8], an intermediate storage inductor, intermediate transfer capacitors and switches [9], all of which are shown approximately to scale.…”

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confidence: 99%

Conceptual design of the Fast-Liner Reactor (FLR) for fusion power

Moses¹,

Krakowski²,

Miller³

1979

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The generation of fusion power from the Fast-Liner Reactor (FLR) concept envisages the implosion of a thin (3mm) metallic cylinder (0.2-m radius by 0.2-m length) onto a preinjected plasma. This plasma would be heated to thermonuclear temperatures by adiabatic compression, pressure confinement would be provided by the liner inertia, and thermal insulation of the wall-confined plasma would be established by an embedded azimuthal magnetic field. A 2-to 3-ys burn would follow the ^10 4 m/s radial implosion and would result in a thermonuclear yield equal to 10-15 times the energy initially invested into the liner kinetic energy. For implosions occurring once every 10 s a gross thermal power of 430 MWt would be generated. The results of a comprehensive systems study of both physics and technology (economics) optima are presented. Despite unresolved problems associated with both the physics and technology of the FLR, a conceptual power plant design is presented. Los Alamos Scientific Laboratory has proposed and is conducting experiments on ^10 m/s imploding liners; this approach is similar to that followed ten years ago by Alikhanov et al. Consideration of liner buckling and Rayleigh-Taylor stability, particle and energy confinement, and the desire for very compact systems exhibiting high power densities nave led to the choice of the fast mode. Fast implosions that are driven by an azimuthal field should alleviate the Rayleigh-Taylor instability and supress the plastic-elastic (buckling) instability in addition to allowing wallconfinement of the plasma pressure. The technological problems associated with GJ-level energy transfers and releases over microsecond time intervals g are severe, and to a great extent the magnitude of these problems is related directly to the non-ideal behavior of a fast-liner/plasma system (i.e., liner compressibility, liner stability, field diffusion, plasma turbulence, thermal conduction, and radiation) as reflected by constraints imposed by a realistic engineering energy balance. The Fast-Liner Reactor (FLR) concept combines the favorable aspects of inertia! confinement and heating with the more efficient energy transfer associated with magnetic approaches to yield a conceptual fusion system based on the pulsed burn of a \iery dense D-T plasma. A thin metal cylinder or "liner" of ^0.2-m initial radius, ^3-rnm initial thickness, and ^0.2-m length is imploded radially to a velocity of ^ 10 m/s by self-magnetic fields resulting from large currents driven axially through the liner. The liner implodes onto a ^0.5-keV, ^10-m~° D-T plasma that is initially formed in or injected into the liner. As the liner implodes in ^20-40 us, adiabatic compression raises the plasma to thermonuclear temperatures, and a vigorous fusion burn ensues for ^2-3 JJS. During the implosion the plasma pressure is confined inertially by the metal liner and endplug walls. An imbedded azimuthal magnetic field, generated by an axial current driven through the plasma, provides magnetic insulation against radial and axial therma...

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Losses of a thermonuclear plasma imploded by a high-velocity wall

Cited by 17 publications

References 15 publications

Thermonuclear energy production of a cylindrical plasma imploded by a heavy liner

Thermonuclear energy production of a cylindrical plasma imploded by a heavy liner

Plasma gun supersonic vortex magnetohydrodynamic dynamo for magnetized target fusion

Conceptual design of the Fast-Liner Reactor (FLR) for fusion power

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