Visible Light Tomography Considering Reflection Light in a Small Tokamak Device PHiX

被引：6

作者：

Munechika, Koyo ^{[1
]}

Tsutsui, Hiroaki ^{[1
]}

Tsuji-Iio, Shunji ^{[1
]}

机构：

[1] Tokyo Inst Technol, Tokyo 1528550, Japan

来源：

PLASMA AND FUSION RESEARCH | 2021年 / 16卷 / 16期

关键词：

high-speed camera; tomographic reconstruction; visible light; reflection light; Tikhonov-Phillips; L-curve; ray tracing; small tokamak; synthetic diagnostics platform;

D O I：

10.1585/pfr.16.2402033

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In a small tokamak, the visible light emission is observed and used to investigate plasmas' behavior with a fast visible camera. However, the reflected light causes a systemic error in measuring visible light emitted from the plasma. In this paper, we managed to overcome the reflection effect with the ray-tracing technique which is utilized in a synthetic diagnostic platform of the small tokamak device PHiX at Tokyo Institute of Technology using Raysect and CHERAB python libraries. We successfully evaluated the amount of reflected light and obtained tomographic reconstruction images from simulated and experimental data with the Tikhonov-Phillips regularization and the L-curve method to choose an optimal regularization parameter. We also proposed to project the contour of a reconstruction image onto a camera image to validate tomography results. (C) 2021 The Japan Society of Plasma Science and Nuclear Fusion Research

引用

页码：1 / 5

页数：5

共 16 条

[1] Physically principled reflection models applied to filtered camera imaging inversions in metal walled fusion machines [J].

Carr, M. ;

Meakins, A. ;

Silburn, S. A. ;

Karhunen, J. ;

Bernert, M. ;

Bowman, C. ;

Callarelli, A. ;

Carvalho, P. ;

Giroud, C. ;

Harrison, J. R. ;

Henderson, S. S. ;

Huber, A. ;

Lipschultz, B. ;

Lunt, T. ;

Moulton, D. ;

Reimold, F. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2019, 90 (04)

[2]

cil M. Odstr., 2014, REV SCI INSTRUM, V85

[3] DEMO design activity in Europe: Progress and updates [J].

Federici, G. ;

Bachmann, C. ;

Barucca, L. ;

Biel, W. ;

Boccaccini, L. ;

Brown, R. ;

Bustreo, C. ;

Ciattaglia, S. ;

Cismondi, F. ;

Coleman, M. ;

Corato, V. ;

Day, C. ;

Diegele, E. ;

Fischer, U. ;

Franke, T. ;

Gliss, C. ;

Ibarra, A. ;

Kembleton, R. ;

Loving, A. ;

Maviglia, F. ;

Meszaros, B. ;

Pintsuk, G. ;

Taylor, N. ;

Tran, M. Q. ;

Vorpahl, C. ;

Wenninger, R. ;

You, J. H. .

FUSION ENGINEERING AND DESIGN, 2018, 136 :729-741

[4]

Giroud D.C., 2018, CHERAB SPECTROSCOPY

[5]

Hansen PC, 2001, ADV COMP BIOENG, V5, P119

[6]

I.P.B. Editors, 1999, NUCL FUSION, V39, P2137

[7]

Iwama N., 2006, J PLASMA FUSION RES, V82, P399

[8] DYNAMIC MODELING OF TRANSPORT AND POSITIONAL CONTROL OF TOKAMAKS [J].

JARDIN, SC ;

POMPHREY, N ;

DELUCIA, J .

JOURNAL OF COMPUTATIONAL PHYSICS, 1986, 66 (02) :481-507

[9]

Kobayashi T., 2015, P 42 EPS C PLASM PHY

[10]

Meakins A., 2018, RAYSECTSOURCE V052 R

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