JT-60U 的实验进展

JT-60U的实验进展

2003-04-25

JT-60U: R = 3~3.4m, a = 0.6-1.1m, b = 1.0-1.7m, Ip < 5MA, Bt ~ 4T

•

Advanced Tokamak Research

• High Q• High beta

JT-60U• Long pulse• SteadyState

ITER

Non-inductive CD

Improved confinement

MHD & Instability

• Heat control• Particle control

Advanced operation regimes

• (1) Reversed shear mode with ITB

• (2) High ELMy H-mode

Reversed shear mode with ITB

Reversed Magnetic Shear discharge in JT-60U

•

High equivalent fusion power gain of QDT

eq=1.25

Sustainment of Negative Magnetic Shear with LHCD

Quasi-steady sustainment of transport barriers

Quasi-steady Reversed Shear Mode (18E) by NBI heating: ITB + ETB

Fully Non-Inductive Current Drive in

Quasi-Steady Reversed Shear Plasma

Formation of Internal Transport Barrier

Current Hole in JT-60U

• In the experimental research on JT-60U reversed shear plasmas, a plasma with a 'current hole', a zero-current region at the core part of the toroidal plasma, was discovered in 2000. The zero current in the core region was also reported from JET.

• The current hole extended up to 40 % of the plasma radius. The current hole existed stably for 5 s.

• The current hole is an unexpected discovery in tokamaks.

High Performance Advanced Plasma in JT-60U without Using Central Solenoid Coils

High ELMy H-mode

High performance ELMy H-mode

Sustainment of high normalized beta plasma

H89 = 2.1, N =2.6-2.7, = 0.46, Ip = 1 MA, Bt = 2.1 T

High Fusion Triple Product in High-p H-mode Plasmas

• The world highest fusion triple product of nD

(0) E Ti (0) = 1.5*102

1 m-3 s keV has been achieved in JT-60U's high- p H-mode plasmas.

• Simultaneously the ion temperature marked the world record of 45 keV.

Non-inductive steady-state high-p H-mode plas

mas at high density (60E)

Steady state high performance device is needed

• High Q• High beta

JT-60U• Long pulse• SteadyState

ITER

Non-inductive CD

Improved confinement

MHD & Instability

• Heat control• Particle control

Next plan: JT-60SC

JT-60U

边界物理组芯部物理组

RS

高

MHD

高能粒子

SOL

加料

偏滤器

稳态运行

ITB

NAKA

聚变工程部聚变物理部

计划室

实验 I+II

理论室

解析室

试验室

RF室

NB室

装置室

ITER部 计算中心

JT-60U