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Title: NSTX Diagnostics for Fusion Plasma Science Studies

Abstract

This paper will discuss how plasma science issues are addressed by the diagnostics for the National Spherical Torus Experiment (NSTX), the newest large-scale machine in the magnetic confinement fusion (MCF) program. The development of new schemes for plasma confinement involves the interplay of experimental results and theoretical interpretations. A fundamental requirement, for example, is a determination of the equilibria for these configurations. For MCF, this is well established in the solutions of the Grad-Shafranov equation. While it is simple to state its basis in the balance between the kinetic and magnetic pressures, what they are as functions of space and time are often not easy to obtain. Quantities like the plasma pressure and current density are not directly measurable. They are derived from data that are themselves complex products of more basic parameters. The same difficulties apply to the understanding of plasma instabilities. Not only are the needs for spatial and temporal resolution more stringent, but the wave parameters which characterize the instabilities are difficult to resolve. We will show how solutions to the problems of diagnostic design on NSTX, and the physics insight the data analysis provides, benefits both NSTX and the broader scientific community.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab., NJ (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
787715
Report Number(s):
PPPL-3586
TRN: US0110597
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 5 Jul 2001
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; NSTX DEVICE; CURRENT DENSITY; DATA ANALYSIS; DESIGN; GRAD-SHAFRANOV EQUATION; MAGNETIC CONFINEMENT; PLASMA PRESSURE; DIAGNOSTIC TECHNIQUES; PLASMA INSTABILITY

Citation Formats

R. Kaita, D. Johnson, L. Roquemore, M. Bitter, F. Levinton, F. Paoletti, D. Stutman, and and the NSTX Team. NSTX Diagnostics for Fusion Plasma Science Studies. United States: N. p., 2001. Web. doi:10.2172/787715.
R. Kaita, D. Johnson, L. Roquemore, M. Bitter, F. Levinton, F. Paoletti, D. Stutman, & and the NSTX Team. NSTX Diagnostics for Fusion Plasma Science Studies. United States. doi:10.2172/787715.
R. Kaita, D. Johnson, L. Roquemore, M. Bitter, F. Levinton, F. Paoletti, D. Stutman, and and the NSTX Team. Thu . "NSTX Diagnostics for Fusion Plasma Science Studies". United States. doi:10.2172/787715. https://www.osti.gov/servlets/purl/787715.
@article{osti_787715,
title = {NSTX Diagnostics for Fusion Plasma Science Studies},
author = {R. Kaita and D. Johnson and L. Roquemore and M. Bitter and F. Levinton and F. Paoletti and D. Stutman and and the NSTX Team},
abstractNote = {This paper will discuss how plasma science issues are addressed by the diagnostics for the National Spherical Torus Experiment (NSTX), the newest large-scale machine in the magnetic confinement fusion (MCF) program. The development of new schemes for plasma confinement involves the interplay of experimental results and theoretical interpretations. A fundamental requirement, for example, is a determination of the equilibria for these configurations. For MCF, this is well established in the solutions of the Grad-Shafranov equation. While it is simple to state its basis in the balance between the kinetic and magnetic pressures, what they are as functions of space and time are often not easy to obtain. Quantities like the plasma pressure and current density are not directly measurable. They are derived from data that are themselves complex products of more basic parameters. The same difficulties apply to the understanding of plasma instabilities. Not only are the needs for spatial and temporal resolution more stringent, but the wave parameters which characterize the instabilities are difficult to resolve. We will show how solutions to the problems of diagnostic design on NSTX, and the physics insight the data analysis provides, benefits both NSTX and the broader scientific community.},
doi = {10.2172/787715},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 05 00:00:00 EDT 2001},
month = {Thu Jul 05 00:00:00 EDT 2001}
}

Technical Report:

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