Optical boundary reconstruction of tokamak plasmas for feedback control of plasma position and shape

被引：45

作者：

Hommen, G. ^{[1
,2
]}

de Baar, M. ^{[1
,2
]}

Nuij, P. ^{[1
]}

McArdle, G. ^{[3
]}

Akers, R. ^{[3
]}

Steinbuch, M. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Control Syst Technol Grp, NL-5600 MB Eindhoven, Netherlands

[2] EURATOM, FOM Inst Plasma Phys Rijnhuizen, NL-3430 BE Nieuwegein, Netherlands

[3] EURATOM CCFE Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2010年 / 81卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

H-MODE; CONFINEMENT; ASDEX; EDGE; MAST;

D O I：

10.1063/1.3499219

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A new diagnostic is developed to reconstruct the plasma boundary using visible wavelength images. Exploiting the plasma's edge localized and toroidally symmetric emission profile, a new coordinate transform is presented to reconstruct the plasma boundary from a poloidal view image. The plasma boundary reconstruction is implemented in MATLAB and applied to camera images of Mega-Ampere Spherical Tokamak discharges. The optically reconstructed plasma boundaries are compared to magnetic reconstructions from the offline reconstruction code EFIT, showing very good qualitative and quantitative agreement. Average errors are within 2 cm and correlation is high. In the current software implementation, plasma boundary reconstruction from a single image takes 3 ms. The applicability and system requirements of the new optical boundary reconstruction, called OFIT, for use in both feedback control of plasma position and shape and in offline reconstruction tools are discussed. (C) 2010 American Institute of Physics. [doi:10.1063/1.3499219]

引用

页数：13

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