TFTR Mirnov coil analysis at plasma start-up
Abstract
The methods for finding poloidal and toroidal numbers of MHD oscillations from Mirnov coils are reviewed and modified. Examples of various MHD phenomena occurring during start-up on TFTR are illustrated. It is found that the MHD mode structure best fits a model with the toroidal correction included. A new algorithm which finds m,n numbers can accommodate toroidal effects which are manifested in the phase data. The algorithm can find m,n numbers with a given toroidal correction parameter lambda', (lambda' = 0 cylindrical). This algorithm is also used to find the optimal value of lambda' automatically, eliminating the need for ''guesswork.'' The algorithm finds the best parameters to the fit much faster than more conventional computational techniques. 9 refs., 21 figs., 2 tabs.
- Authors:
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- OSTI Identifier:
- 6027511
- Report Number(s):
- PPPL-2298
ON: DE86006354
- DOE Contract Number:
- AC02-76CH03073
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TFTR TOKAMAK; START-UP; ALGORITHMS; COMPUTERIZED SIMULATION; MAGNET COILS; MAGNETOHYDRODYNAMICS; TEARING INSTABILITY; ELECTRIC COILS; ELECTRICAL EQUIPMENT; EQUIPMENT; FLUID MECHANICS; HYDRODYNAMICS; INSTABILITY; MATHEMATICAL LOGIC; MECHANICS; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; SIMULATION; THERMONUCLEAR REACTORS; TOKAMAK TYPE REACTORS; 700202* - Fusion Power Plant Technology- Magnet Coils & Fields
Citation Formats
Harley, T R, Buchenauer, D A, Coonrod, J, and McGuire, K M. TFTR Mirnov coil analysis at plasma start-up. United States: N. p., 1986.
Web. doi:10.2172/6027511.
Harley, T R, Buchenauer, D A, Coonrod, J, & McGuire, K M. TFTR Mirnov coil analysis at plasma start-up. United States. https://doi.org/10.2172/6027511
Harley, T R, Buchenauer, D A, Coonrod, J, and McGuire, K M. 1986.
"TFTR Mirnov coil analysis at plasma start-up". United States. https://doi.org/10.2172/6027511. https://www.osti.gov/servlets/purl/6027511.
@article{osti_6027511,
title = {TFTR Mirnov coil analysis at plasma start-up},
author = {Harley, T R and Buchenauer, D A and Coonrod, J and McGuire, K M},
abstractNote = {The methods for finding poloidal and toroidal numbers of MHD oscillations from Mirnov coils are reviewed and modified. Examples of various MHD phenomena occurring during start-up on TFTR are illustrated. It is found that the MHD mode structure best fits a model with the toroidal correction included. A new algorithm which finds m,n numbers can accommodate toroidal effects which are manifested in the phase data. The algorithm can find m,n numbers with a given toroidal correction parameter lambda', (lambda' = 0 cylindrical). This algorithm is also used to find the optimal value of lambda' automatically, eliminating the need for ''guesswork.'' The algorithm finds the best parameters to the fit much faster than more conventional computational techniques. 9 refs., 21 figs., 2 tabs.},
doi = {10.2172/6027511},
url = {https://www.osti.gov/biblio/6027511},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}