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|a (TOE)ost10183308
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|a E 1.99:doe/er/51124--7
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|a E 1.99:doe/er/51124--7
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|a High beta and second stability region transport and stability analysis. Final report
|h [electronic resource]
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| 260 |
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|a Washington, D.C. :
|b United States. Dept. of Energy ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
|c 1992.
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| 300 |
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|a 90 p. :
|b digital, PDF file.
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|a text
|b txt
|2 rdacontent.
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| 337 |
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|a computer
|b c
|2 rdamedia.
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| 338 |
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|a online resource
|b cr
|2 rdacarrier.
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|a Published through the Information Bridge: DOE Scientific and Technical Information.
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| 500 |
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|a 09/01/1992.
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| 500 |
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|a "doe/er/51124--7"
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|a "DE93000886"
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| 500 |
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|a Hughes, M.H.; Hartley, R.; Todd, A.M.M.; Phillps, M.W.; Krishnaswami, J.
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| 500 |
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|a Grumman Corp., Princeton, NJ (United States)
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| 513 |
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|a Final;
|b 01/01/1989 - 12/31/1992.
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3 |
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|a This report describes ideal and resistive studies of high-beta plasmas and of the second stability region. Emphasis is focused on ̀̀supershot̀̀ plasmas in TFIR where MHD instabilities are frequently observed and which spoil their confinement properties. Substantial results are described from the analysis of these high beta poloidal plasmas. During these studies, initial pressure and safety factor profiles were obtained from the TRANSP code, which is used extensively to analyze experimental data. Resistive MBD stability studies of supershot equilibria show that finite pressure stabilization of tearing modes is very strong in these high βp plasmas. This has prompted a detailed re-examination of linear tearing mode theory in which we participated in collaboration with Columbia University and General Atomics. This finite pressure effect is shown to be highly sensitive to small scale details of the pressure profile. Even when an ad hoc method of removing this stabilizing mechanism is implemented, however, it is shown that there is only superficial agreement between resistive MBD stability computation and the experimental data. While the mode structures observed experimentally can be found computationally, there is no convincing correlation with the experimental observations when the computed results are compared with a large set of supershot data. We also describe both the ideal and resistive stability properties of TFIR equilibria near the transition to the second region. It is shown that the highest β plasmas, although stable to infinite-n ideal ballooning modes, can be unstable to the so called ̀̀infernal̀̀ modes associated with small shear. The sensitivity of these results to the assumed pressure and current density profiles is discussed. Finally, we describe results from two collaborative studies with PPPL. The first involves exploratory studies of the role of the 1/1 mode in tokamaks and, secondly, a study of sawtooth stabilization using ICRF.
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|b FG02-89ER51124.
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|a Sawtooth Oscillations.
|2 local.
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|a Mhd Equilibrium.
|2 local.
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|a Tftr Tokamak.
|2 local.
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|a High-beta Plasma.
|2 local.
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|a Progress Report.
|2 local.
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| 650 |
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|a Computerized Simulation.
|2 local.
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| 650 |
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|a Plasma Instability.
|2 local.
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| 650 |
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|a Stability.
|2 local.
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| 650 |
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|a Current Density.
|2 local.
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|a Icr Heating.
|2 local.
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|a Charged-particle Transport.
|2 local.
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| 650 |
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|a Plasma Physics And Fusion Technology.
|2 edbsc.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|4 spn.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|b Chicago Operations Office.
|4 res.
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| 710 |
1 |
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|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
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| 856 |
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|u http://www.osti.gov/servlets/purl/10183308-PyofuJ/
|z Online Access
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| 907 |
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|a .b59709698
|b 03-06-23
|c 05-26-10
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| 998 |
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|a web
|b 05-26-10
|c f
|d m
|e p
|f eng
|g dcu
|h 0
|i 1
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|a Information bridge
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|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:doe/er/51124--7
|h Superintendent of Documents classification
|i web
|n 1
|
