Author: Howard M. Stainer
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
Book Description
A theoretical study was made of the characteristics of structured plasma puffs produced in a two-coil theta-pinch gun. The puffs are fired into a drift tube containing a longitudinal magnetic field, and their subsequent behavior is analyzed. Electron-electron and ion-ion collision times are short enough so that scalar pressures (P = nkT) can be used. Ion-electron collision times, however, are of the duration of the experiment or longer, allowing the use of two-fluid moment equations. An idealized model for the plasma puffs is proposed in which the ion fluid rotates as a rigid body in one direction about the longitudinal axis, and the electron fluid rotates in the opposite direction. This high-Beta model yields self-consistent equilibrium density and magnetic field profiles, stemming from a balance among thermal, magnetic, centrifugal, and electrostatic forces, that are compatible with observation. It is shown that double magnetic pick-up loop signals can be analyzed to ascertain the temperature, peak density, angular momentum, etc., of the plasma as it travels down the tube, and a sample calculation is presented to indicate the probable evolution of a typical puff. Thus, the model provides a self-consistent high-Beta approach to the problem of plasma and magnetic-field interaction. (Author).
Some Consequences of Rotation in Theta-pinch-generated Plasma Confined by a Longitudinal Magnetic Field
Author: Howard M. Stainer
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
Book Description
A theoretical study was made of the characteristics of structured plasma puffs produced in a two-coil theta-pinch gun. The puffs are fired into a drift tube containing a longitudinal magnetic field, and their subsequent behavior is analyzed. Electron-electron and ion-ion collision times are short enough so that scalar pressures (P = nkT) can be used. Ion-electron collision times, however, are of the duration of the experiment or longer, allowing the use of two-fluid moment equations. An idealized model for the plasma puffs is proposed in which the ion fluid rotates as a rigid body in one direction about the longitudinal axis, and the electron fluid rotates in the opposite direction. This high-Beta model yields self-consistent equilibrium density and magnetic field profiles, stemming from a balance among thermal, magnetic, centrifugal, and electrostatic forces, that are compatible with observation. It is shown that double magnetic pick-up loop signals can be analyzed to ascertain the temperature, peak density, angular momentum, etc., of the plasma as it travels down the tube, and a sample calculation is presented to indicate the probable evolution of a typical puff. Thus, the model provides a self-consistent high-Beta approach to the problem of plasma and magnetic-field interaction. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 71
Book Description
A theoretical study was made of the characteristics of structured plasma puffs produced in a two-coil theta-pinch gun. The puffs are fired into a drift tube containing a longitudinal magnetic field, and their subsequent behavior is analyzed. Electron-electron and ion-ion collision times are short enough so that scalar pressures (P = nkT) can be used. Ion-electron collision times, however, are of the duration of the experiment or longer, allowing the use of two-fluid moment equations. An idealized model for the plasma puffs is proposed in which the ion fluid rotates as a rigid body in one direction about the longitudinal axis, and the electron fluid rotates in the opposite direction. This high-Beta model yields self-consistent equilibrium density and magnetic field profiles, stemming from a balance among thermal, magnetic, centrifugal, and electrostatic forces, that are compatible with observation. It is shown that double magnetic pick-up loop signals can be analyzed to ascertain the temperature, peak density, angular momentum, etc., of the plasma as it travels down the tube, and a sample calculation is presented to indicate the probable evolution of a typical puff. Thus, the model provides a self-consistent high-Beta approach to the problem of plasma and magnetic-field interaction. (Author).
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1282
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1282
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Causes of Magnetic-field Nonuniformity and Its Effect on Stability of Theta-pinch Plasma
Author: Joseph Norwood
Publisher:
ISBN:
Category : Pinch effect (Physics)
Languages : en
Pages : 76
Book Description
The various instabilities which beset the theta-pinch plasma are described in some detail, and the importance of the role of magnetic-field uniformity is demonstrated. Sources of the field nonuniformity are delineated and discussed. These included the collector-plate geometry, the nonlinear effect of the plasma, and effects in the coil, discontinuity in gap spacing as the current flows into the coil, and effects of the alteration in axial current distribution due to skin effect.
Publisher:
ISBN:
Category : Pinch effect (Physics)
Languages : en
Pages : 76
Book Description
The various instabilities which beset the theta-pinch plasma are described in some detail, and the importance of the role of magnetic-field uniformity is demonstrated. Sources of the field nonuniformity are delineated and discussed. These included the collector-plate geometry, the nonlinear effect of the plasma, and effects in the coil, discontinuity in gap spacing as the current flows into the coil, and effects of the alteration in axial current distribution due to skin effect.
Nuclear Science Abstracts
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1298
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1298
Book Description
U.S. Government Research and Development Reports Index
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 728
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 728
Book Description
Nuclear Science Abstracts
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1162
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1162
Book Description
Fusion Energy Update
Author:
Publisher:
ISBN:
Category : Controlled fusion
Languages : en
Pages : 170
Book Description
Publisher:
ISBN:
Category : Controlled fusion
Languages : en
Pages : 170
Book Description
Documentation of Plasma Physics. Pt. 1, Experimental Plasma Physics [and] Theoretical Plasma Physics
Author:
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 570
Book Description
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 570
Book Description
U. S. Government Research and Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1214
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1214
Book Description
U.S. Government Research & Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1208
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1208
Book Description