3rd US-PRC Magnetic Fusion Collaboration Workshop 3rd US-PRC Magnetic Fusion Collaboration Workshop May 18, 19 , 2006 Dalian ChinaMay 18, 19 , 2006 Dalian China

The Progress of J-TEXT Rebuilding at The Progress of J-TEXT Rebuilding at Huazhong University of Science and THuazhong University of Science and T

echnology echnology

Kexun YU, Kexun YU, Hongfa DINGHongfa DING, Yuan PAN, Yuan PAN

andand J-TEXT Team College of Electrical and Electronic EngineeringHuazhong University of Science and Technology

May 19, 2006

OutlineOutline

1. Introduction1. Introduction

2. The up-to-date Re-building2. The up-to-date Re-building

3. The ongoing Work3. The ongoing Work

4. The J-TEXT could do in China MCF4. The J-TEXT could do in China MCF

ProjectProject

5. Acknowledgement5. Acknowledgement

Cooperation Background 1. Cooperation program of U.S.-PRC in magnetic confinement

fusion field for 2002

1. Introduction

1. Introduction

2. The Agreement between HUST of China and UT Austin of US

Cooperation Background

Major points of the agreement of UT Austin and HUST:

FRC of UT Austin contributes the completed set of TEXT device to HUST, and also provides the auxiliary equipments, engineering support.

FRC of HUST will contribute building of the Joint TEXT Lab, and cover all of expenditure for setting up the Joint TEXT Lab.

The Joint TEXT Lab will be also used to train graduate students from both sides. Both sides will start exchanging program of graduate students and scholars.

The patent copyright and experimental data at the Joint TEXT Lab will be shared by FRC of UT Austin and FRC of HUST.

1. Introduction

Cooperation Background

1. Introduction

The Texas Experimental Tokamak (TEXT) was built and operated by the University of Texas at Austin under the United States Department of Energy. TEXT is a general–purpose device designed to provide facilities for fusion experiments. The main program is devoted to the study of plasma transport and turbulence. In addition, a number of smaller programs are undertaken.

The TEXT DeviceThe TEXT Device

The TEXT DeviceThe TEXT Device

In 1990, the TEXT device was upgraded to TEXT-U. With the upgraded device, it will be possible to study the scalings of transport and fluctuations with increased power and for diverted discharges. The combination of a diverter and auxiliary heating should initiate the H-mode transition and extend these studies to H-mode plasma.

The whole TEXT device was moved to HUST at the end of 2003. And the joint TEXT Lab is under construction the joint TEXT Lab is under construction at the campus of HUST.at the campus of HUST.

1. Introduction

The TEXT-U Device The TEXT-U Device At UT Austin before DisassemblyAt UT Austin before Disassembly

TEXT-U Laboratory At UT AustinTEXT-U Laboratory At UT Austin

The main parameters of J-TEXT

Major Radius R = 1.05 m

Minor Radius a = 0.26 m

Plasma Current Ip = 400 kA

Magnetic Field BT = 3 T

Plasma Density ne = 3.4x1019m-3

The TEXT Device

1. Introduction

1. Introduction

The Diagnostic SystemsThe Diagnostic Systems

Assignment of TEXT-UAssignment of TEXT-U

2. The up-to-date Re-building

The total investment is up to ￥ 17.7 million:

￥ 5 million for moving the TEXT device from UT to HUST

￥ 4 million for the laboratory building construction

￥ 1.5 million for the installation of Motor-Generator set

￥ 4 million for the power supply capacity upgrade

￥ 3.2 million for the reinstallation of the main machine of J-TEXT

The investment in the re-building

2. The up-to-date Re-building

Authorized by Ministry of Education of China, a new speciality of pulse power and plasma was set up in HUST.

A group of young students, including postgraduate students, more than ten masters and doctors, are trained and join in the project of the rebuilding of J-TEXT Lab.

2. The up-to-date Re-building

A new experimental building with its area over 1000 m2 has been completed.

Some old experimental hall and rooms over 1000 m2 have

been decorated.

A building over 4000 m2 are also improved to serves as

research and administration area.

Rooms for discharge control and data acquisition &

management with antistatic floor have been built.

Construction of the building of the J-TEXT laboratory.

The overlook of the J-TEXT laboratory

The decorated research building

The re-installation of J-TEXT inside the Tokamak hall

2. The up-to-date Re-building

The main machine of the J-TEXT

2. The up-to-date Re-buildingCompleted the main circuit connection of the power supply

system for magnetic field.

2. The up-to-date Re-building

the tokamak platform has been set up

3. The up-to-date Re-building

Re-installation of 100 MW pulsed motor-generator

2. The up-to-date Re-building

Power supply capacity has been upgraded to 6MVA.

power distribution room after the power supply capacity upgraded

2. The up-to-date Re-building

Most of the cooling water system has been finished

The 50 tons water tank integrate three 37kW pumping system inside

2. The up-to-date Re-building

The basic magnetic diagnostic system

• Plasma current—IP(t) measured by four Rogovski coils around the vacuum vessel.

• Loop voltage--V(t) measured by six loops around the vacuum vessel.

• MHD activity—studied by Mirnov magnetic probe arrays

• Total energy--Etot measured with diamagnetic loops

Rogovski coil to measure the plasma current

3. The ongoing Work

The control systems of 100 MW pulsed motor-generator The system of de-ionized water the rest part of the power supply system for J-TEXT magnetic

field and its control system vacuum system data acquisition and management system plasma diagnostic systems

Several systems are being developed:Several systems are being developed:

Schematic of general control system of J-TEXTSchematic of general control system of J-TEXT

The The general general control control system system of J-of J-

TEXTTEXT

100MW 100MW motor-motor-

generatorgenerator

power power supplysupply

data acquisition systemdata acquisition system

diagnostic systemdiagnostic system

security and protection systemsecurity and protection system

vacuum systemvacuum system

TF P. S.TF P. S.

OH P.S.OH P.S.

HF P.S.HF P.S.

VF P.S.VF P.S.

DV P.S.DV P.S.

Operating status monitor and protectionOperating status monitor and protection

Excitation system and its power supply controlExcitation system and its power supply control

Variable speed control (doubly-fed)Variable speed control (doubly-fed)

3. 3. The ongoing Work ongoing Work

Plasma Plasma diagnostic system being developed

• The vertical and horizontal position calculated from sine and cosine loops.

• Hαintensity monitored with an interference filter and photodiode.

• the line-averaged plasma density on a vertical chord measured by infrared HCN interferometer .

• Electron temperature measured with the soft X-ray pulse height analysis (PHA) system.

• Radiated power-- a bolometer viewing a central chord of the plasma.

4.The J-TEXT could Do in China MCF Project

A world-wide open laboratory in the field of fusion plasma. Combining with the other education resources of Hust, it co

uld be the main experimental device for cultivating and training fusion engineers

Used to examine the innovate idea and develop advanced operation regime.

Devote to the R&D of novel fusion technology

Serves as the complementary and pre-experimental device for large-size tokamaks.

Special Expectation

In our schedule, the whole rebuilding work will be completed by the end of this year. And now we need the supports from all aspects, especially finance funding, to guarantee our rebuilding plan of J-TEXT.

5. Acknowledgement

• FRC of UT Austin, USEspecially for Professor Kenneth Gentle, engineer Keith Carter, Doctor He Huang, and many other friends.

• Southwestern Institute of Physics, China

• Institute of Plasma Physics, Chinese Academy of Science

Thank you!