Heating of a Plasma by a Powerful Relativistic Electron Beam in a Strong Magnetic Field PDF Download
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Author:
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ISBN:
Category : Controlled fusion
Languages : en
Pages : 21
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Book Description
Author:
Publisher:
ISBN:
Category : Controlled fusion
Languages : en
Pages : 21
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Book Description
Author: Michael D. Montgomery
Publisher:
ISBN:
Category : Plasma density
Languages : en
Pages : 14
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Book Description
An intense (5 x 105 Amp/cm2), relativistic (5 MeV), electron beam will be used to investigate the heating of small volumes (~5 to 10 cm3) of dense plasma (1017-- 1018 electrons/cm3) to kilovolt temperatures via the electrostatic two-stream instability.
Author:
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Category :
Languages : en
Pages :
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Book Description
A device and method for relativistic electron beam heating of a high-density plasma in a small localized region. A relativistic electron beam generator or accelerator produces a high-voltage electron beam which propagates along a vacuum drift tube and is modulated to initiate electron bunching within the beam. The beam is then directed through a low-density gas chamber which provides isolation between the vacuum modulator and the relativistic electron beam target. The relativistic beam is then applied to a high-density target plasma which typically comprises DT, DD, hydrogen boron or similar thermonuclear gas at a density of 10.sup. 17 to 10.sup. 20 electrons per cubic centimeter. The target gas is ionized prior to application of the electron beam by means of a laser or other preionization source to form a plasma. Utilizing a relativistic electron beam with an individual particle energy exceeding 3 MeV, classical scattering by relativistic electrons passing through isolation foils is negligible. As a result, relativistic streaming instabilities are initiated within the high-density target plasma causing the relativistic electron beam to efficiently deposit its energy and momentum into a small localized region of the high-density plasma target. Fast liners disposed in the high-density target plasma are explosively or ablatively driven to implosion by a heated annular plasma surrounding the fast liner which is generated by an annular relativistic electron beam. An azimuthal magnetic field produced by axial current flow in the annular plasma, causes the energy in the heated annular plasma to converge on the fast liner.
Author: Michael Alter Greenspan
Publisher:
ISBN:
Category : Electron beams
Languages : en
Pages : 590
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Book Description
Author: Kwo-Ray Chu
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 244
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Book Description
Author: Frederick Lee Sandel
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ISBN:
Category : Electron beams
Languages : en
Pages : 264
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Book Description
Author: D. A. Hammer
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ISBN:
Category :
Languages : en
Pages : 115
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Book Description
Experimental results are presented for the heating of a 4 m long plasma confined by a uniform magnetic field of 4-5 kG by an intense relativistic electron beam. The initial plasma density ranged from approximately 5 x 10 to the 13th power cu cm to approximately 3 x 10 to the 15th power cu cm, the lower density cases being partially ionized and the higher density cases highly ionized. In all cases, the energy coupled from the beam to the plasma is greater than can be explained by binary collisions between beam electrons and the plasma particles. Over most of the density range tested, 5 x 10 to the 13th power cu cm to 1.5 x 10 to the 15th power cu cm the plasma heating cannot be explained by classical processes. These results are found to be explained quantitatively by the use of a full nonlinear treatment of the electron-electron two stream instability in the kinetic regime. A review of beam plasma interaction theory and previous experiments is presented to facilitate comparison with the present results.
Author:
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ISBN:
Category : Nuclear energy
Languages : en
Pages : 612
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Author: G. Janssen
Publisher:
ISBN:
Category :
Languages : en
Pages : 125
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 030908637X
Category : Science
Languages : en
Pages : 177
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Book Description
Recent scientific and technical advances have made it possible to create matter in the laboratory under conditions relevant to astrophysical systems such as supernovae and black holes. These advances will also benefit inertial confinement fusion research and the nation's nuclear weapon's program. The report describes the major research facilities on which such high energy density conditions can be achieved and lists a number of key scientific questions about high energy density physics that can be addressed by this research. Several recommendations are presented that would facilitate the development of a comprehensive strategy for realizing these research opportunities.
