Plasma initiation and preliminary magnetic control in the HL-2M tokamak

被引：13

作者：

Song, X. ^{[1
]}

Song, X. M. ^{[1
]}

Li, B. ^{[1
]}

Zhou, J. ^{[1
]}

Nardon, E. ^{[2
]}

Heumann, H. ^{[3
]}

Faugeras, B. ^{[3
]}

Li, J. X. ^{[1
]}

Wang, Sh. ^{[1
]}

Liang, Sh. Y. ^{[1
]}

Zhang, J. Z. ^{[1
]}

Sun, T. F. ^{[1
]}

Li, W. B. ^{[1
]}

Huang, Zh. H. ^{[1
]}

Liu, L. ^{[1
]}

Yang, Z. C. ^{[1
]}

Wang, H. X. ^{[1
]}

Ji, X. Q. ^{[1
]}

Zhong, W. L. ^{[1
]}

机构：

[1] Southwestern Inst Phys, POB 432, Chengdu, Peoples R China

[2] CEA, IRFM, F-13108 St Paul Les Durance, France

[3] Univ Cote Azur, CNRS UMR 7351, CASTOR INRIA, Lab JA Dieudonn, Nice, France

来源：

NUCLEAR FUSION | 2021年 / 61卷 / 08期

关键词：

HL-2M; plasma initiation; first plasma; feedback control; plasma equilibria reconstruction; DESIGN;

D O I：

10.1088/1741-4326/ac09fc

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：

The first plasmas have been achieved in the HL-2M tokamak by fulfilling the usual criteria for plasma breakdown, i.e. optimal working gas pressure, field null configuration of poloidal magnetic field, reasonable toroidal electrical field and clean wall conditions. The characterization of plasma initiation, such as identification of initiation time and position, is performed by diagnostic data analysis and numerical simulation. A model-based method, which enables dedicated pick-up sensors to estimate plasma radial position in real time, is applied for the limiter plasma shape in the first plasma commissioning phase. For a circular cross-section plasma, feedback control on plasma current and radial position allowed us to extend discharge durations to similar to 250 ms associated with a 120 kA plasma current in flat-top. Preliminary plasma equilibrium reconstruction by the NICE code from pick-up sensors and flux loops, as well as interferometry measurements, gives plasma boundaries, plasma profiles of toroidal current density and safety factor, as well as electron density, in an offline way.

引用

页数：9

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