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in creator/contributor: "Prager, S."  
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Global confinement in the MST (Madison Symmetric Torus) reversed field pinch

Description: Global confinement measured in the first six months of MST full design operation is summarized. Central electron temperature and enhancement of resistivity over the Z = 1 Spitzer value are similar to other RFP experiments for the same value of I/N. As in several other RFP experiments, energy confinement time and poloidal beta are found to decrease with increasing plasma current, with maximum values of {tau}{sub E} {approximately} 1 ms and {beta}{sub p} {approximately} 10%. Particle transport ma… more
Date: October 1, 1990
Creator: Almagri, A.; Assadi, S.; Beckstead, J.; Chartas, G.; Cudzinovic, M.; Den Hartog, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Edge fluctuations in the MST (Madison Symmetric Torus) reversed field pinch

Description: Edge magnetic and electrostatic fluctuations are measured in the Madison Symmetric Torus (MST) reversed field pinch. At low frequency (<25 kHz), the mode number spectra of magnetic fluctuations agree very well with theoretical prediction for nonlinearly saturated tearing fluctuations resonant in the core. At high frequency (50 kHz to 100 kHz) the magnetic spectra broaden and the modes become resonant in the reversal region. Nonlinear phenomena are under experimental investigation. The low frequ… more
Date: October 1, 1990
Creator: Almagri, A.; Assadi, S.; Beckstead, J.; Chartas, G.; Crocker, N.; Den Hartog, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Reversed-field pinch studies in the Madison Symmetric Torus

Description: Studies of large-size (R = 1.5 m, a = 0.5 m), moderate current (I < 750 kA) reversed-field pinch (RFP) plasmas are carried out in the Madison Symmetric Torus in order to evaluate and improve RFP confinement, study general toroidal plasma MHD issues, determine the mechanism of the RFP dynamo, and measure fluctuation-induced transport and anomalous ion heating. MST confinement has been improved by reduction of magnetic field errors with correction coils in the primary circuit and reduction of imp… more
Date: April 3, 1993
Creator: Hokin, S.; Almagri, A.; Cekic, M.; Chapman, B.; Crocker, N.; Den Hartog, D.J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Anomalous ion heating and superthermal electrons in the MST reversed-field pinch

Description: Anomalous ion heating and superthermal electron populations have been studied in the MST reversed-field pinch. The ion heating is much stronger than that given by classical electron-ion friction, and is particularly strong during dynamo bursts. The heating displays a marked density dependence: in a 350-kA discharge with a maximum {bar n} = 0.9 {times} 10{sup 13} cm{sup {minus} 3}, T{sub i} rises sharply as {bar n} drops below 0.4 {times} 10{sub 13} cm{sup {minus}3} late in the discharge. Supert… more
Date: September 1, 1992
Creator: Hokin, S.; Almagri, A.; Assadi, S.; Cekic, M.; Chapman, B.; Chartas, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Reversed-field pinch studies in the Madison Symmetric Torus

Description: Studies of large-size (R = 1.5 m, a = 0.5 m), moderate current (I < 750 kA) reversed-field pinch (RFP) plasmas are carried out in the Madison Symmetric Torus in order to evaluate and improve RFP confinement, study general toroidal plasma MHD issues, determine the mechanism of the RFP dynamo, and measure fluctuation-induced transport and anomalous ion heating. MST confinement has been improved by reduction of magnetic field errors with correction coils in the primary circuit and reduction of imp… more
Date: April 3, 1993
Creator: Hokin, S.; Almagri, A.; Cekic, M.; Chapman, B.; Crocker, N.; Den Hartog, D. J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Disruptions, Disruptivity, and Safer Operating Windows in the High-β Spherical Torus NSTX

Description: A fusion pilot plant study was initiated to clarify the development needs in moving from ITER to a first of a kind fusion power plant. The mission of the pilot plant was set to encompass component test and fusion nuclear science missions yet produce net electricity with high availability in a device designed to be prototypical of the commercial device. The objective of the study was to evaluate three different magnetic configuration options, the advanced tokamak (AT), spherical tokamak (ST) and… more
Date: September 26, 2012
Creator: Brown, T.; Goldston, R. J.; El-Guebaly, L.; Kessel, C.; Neilson, G. H.; Malang, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Anomalous ion heating and superthermal electrons in the MST reversed-field pinch

Description: Anomalous ion heating and superthermal electron populations have been studied in the MST reversed-field pinch. The ion heating is much stronger than that given by classical electron-ion friction, and is particularly strong during dynamo bursts. The heating displays a marked density dependence: in a 350-kA discharge with a maximum {bar n} = 0.9 {times} 10{sup 13} cm{sup {minus} 3}, T{sub i} rises sharply as {bar n} drops below 0.4 {times} 10{sub 13} cm{sup {minus}3} late in the discharge. Supert… more
Date: September 1, 1992
Creator: Hokin, S.; Almagri, A.; Assadi, S.; Cekic, M.; Chapman, B.; Chartas, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparison of Options for a Pilot Plant Fusion Nuclear Mission

Description: A fusion pilot plant study was initiated to clarify the development needs in moving from ITER to a first of a kind fusion power plant, following a path similar to the approach adopted for the commercialization of fission. The pilot plant mission encompassed component test and fusion nuclear science missions plus the requirement to produce net electricity with high availability in a device designed to be prototypical of the commercial device. Three magnetic configuration options were developed a… more
Date: August 27, 2012
Creator: Brown, T.; Goldston, R. J.; El-Guebaly, L.; Kessel, C.; Neilson, G. H.; Malang, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Workshop on Feedback Stabilization of MHD Stabilities

Description: The feedback stabilization of MHD instabilities is an area of research that is critical for improving the performance and economic attractiveness of magnetic confinement devices. A Workshop dedicated to feedback stabilization of MHD instabilities was held from December 11-13, 1996 at the Princeton Plasma Physics Laboratory, Princeton NJ, USA. The resulting presentations, conclusions, and recommendations are summarized.
Date: December 31, 1996
Creator: McGuire, K.; Kugel, H.; La Haye, R.; Mauel, M.; Nevins, W. & Prager, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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