Fast tokamak plasma flux and electron density reconstruction technique

Journal Article · Wed Jan 01 04:00:00 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--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

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