Fast tokamak plasma flux and electron density reconstruction technique

Journal Article · Wed Jan 01 00:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147714· OSTI ID:451909

Chiang, K L; Hallock, G A; Wootton, A J; Wang, L ^[1]

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1. Fusion Research Center, The University of Texas at Austin, Austin, Texas 78712 (United States)

Density profiles in TEXT-U are obtained using a vertical viewing far-infrared (FIR) interferometer. To obtain the local (inverted) density, we have developed a simple analytic model of the plasma equilibrium configuration which is faster than EFIT (a flux surface reconstruction program) and can be easily computed between discharges. This analytic solution of the Grad{endash}Shafranov equation is valid as long as the pressure p is a function of poloidal flux {psi}, i.e., p=p({psi}). The procedure incorporates both magnetic and FIR density data to solve the Grad{endash}Shafranov equation, and provides a density profile which is self-consistent with the reconstructed equilibrium flux surfaces. Examples are presented. {copyright} {ital 1997 American Institute of Physics.}

• DOE Contract Number: FG03-94ER54241
• OSTI ID: 451909
• Report Number(s): CONF-960543-; ISSN 0034-6748; TRN: 97:006266
• Journal Information: Review of Scientific Instruments, Vol. 68, Issue 1; Conference: 11. annual high-temperature plasma diagnostics conference, Monterey, CA (United States), 12-16 May 1996; Other Information: PBD: Jan 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TEXT DEVICES
PLASMA DIAGNOSTICS
PLASMA DENSITY
EQUILIBRIUM PLASMA
ANALYTICAL SOLUTION
ITERATIVE METHODS
MAGNETIC FLUX
TOKAMAK DEVICES
PLASMA SIMULATION
INFRARED RADIATION
INTERFEROMETRY
INTERFEROMETERS
EQUILIBRIUM
plasma toroidal confinement
surface fitting
physics computing