An Investigation of High Energy Runaway Electron Confinement in the Oak Ridge Tokamak PDF Download
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Author: Steward Jay Zweben
Publisher:
ISBN:
Category : Plasma confinement
Languages : en
Pages : 578
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Book Description
Author: Steward Jay Zweben
Publisher:
ISBN:
Category : Plasma confinement
Languages : en
Pages : 578
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
High energy runaway electrons in the Oak Ridge tokamak ORMAK have been investigated through measurement of the bremsstrahlung produced when these electrons leave the discharge and strike the limiting aperture of the torus. The experimental results have been interpreted in terms of a classical single-particle model appropriate for collisionless particles in a tokamak, and it has been found that most of the confinement properties of high energy runaways in ORMAK can be understood on this basis. An experiment designed to directly test this model has disclosed an anomalous transport which has been described by a runaway diffusion coefficient D approximately 102 to 104 cm2/sec appropriate for runaways near the outside of the plasma. A discussion of the possible mechanisms for this anomalous transport is given.
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Category :
Languages : en
Pages :
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Runaway electrons produced during normal discharges in the Oak Ridge Tokamak (ORMAK) have been studied with a hard x-ray diagnostic system along with most of the other diagnostics available on this machine. It is found that runaways can attain maximum energies of up to 10 MeV and be contained over times of typically 50 msec. A simple physical model is proposed that is consistent with most of the observed high energy runaway phenomena. Some properties of the overall runaway distribtion generated in tokamaks are inferred from these results and are discussed in terms of runaway generation, acceleration, and transport.
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Category : Aeronautics
Languages : en
Pages : 312
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Author:
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Category : Controlled fusion
Languages : en
Pages : 144
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Author:
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ISBN:
Category :
Languages : en
Pages :
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Some of the ramifications of the runaway population in tokamak experiments are investigated. Consideration is given both to the normal operating regime of tokamaks where only a small fraction of high energy runaways are present and to the strong runaway regime where runaways are thought to carry a significant portion of the toroidal current. In particular, the areas to be examined are the modeling of strong runaway discharges, single particle orbit characteristics of runaways, macroscopic beam-plasma equilibria, and stability against kink modes. A simple one-dimensional, time-dependent model has been constructed in relation to strong runaway discharges. Single particle orbits are analyzed in relation to both the strong runaway regime and the weak regime. The effects of vector E x vector B drifts are first considered in strong runaway discharges and are found to lead to a slow inward shrinkage of the beam. Macroscopic beam-plasma equilibria are treated assuming a pressureless relativistic beam with inertia and using an ideal MHD approximation for the plasma. The stability of a toroidal relativistic beam against kink perturbations is examined using several models. (MOW).
Author:
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Category : Power resources
Languages : en
Pages : 448
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Author: United States. Energy Research and Development Administration
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Category : Medicine
Languages : en
Pages : 800
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Author: United States. Energy Research and Development Administration. Technical Information Center
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Category : Force and energy
Languages : en
Pages : 1680
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Author: Oak Ridge National Laboratory
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ISBN:
Category : Fuel
Languages : en
Pages : 1458
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