HT-7 2005 tasks

李建刚

HT-7 ASIPP

Targets of the campaigns

• 2 invite talk for 17th PSI (2006.5), 1 invite talk for EPS(2005.7), 1overview for IAEA (2006.10), other oral talks.

• High quality papers(Science, PRL,NF,PPCF)• Possible operation schedule• HT-7:2005.1-3, 2005.9-11,2006.1-4• EAST: 2005.4-6, 2005.11-12, 2006.7-10

HT-7 ASIPP

我们的优势和主线• 稳态条件下等离子体参数的实时采集和控制；• 稳态条件下等离子体与壁相互作用；• 稳态条件下高性能等离子体的获得。

HT-7 ASIPP

Advanced plasma control

Two issues are missing:PWI(erosion&re-deposition)particle and heat loads

HT-7 ASIPP

Plasma control of SSO in HT-7• Plasma position, density,magnetic flux, heat load (nearly

done for past few years)

• New issues in coming campaigns • New real-time data acquisition and massive storage, dynamic

data analysis(black-box-type)• Real-time feed back control of plasma-wall interaction:LH

power, visible&IR cameras, position feedback manually and automatically(video signal reconstruction for hot spot protection)

• Energetic particles distribution by change LH n||

• Wall recycling and retention by different fueling methods( GP, SMB, pellet)

• Full non-inductive CD H-mode by LH+IBW (5-10s)

HT-7 ASIPP

SSO High Priority Research Areas: recommendations for 2004/2005

• Investigate hybrid scenarios and full current drive plasmas with significant bootstrap current: assess beta limits.

• Use Heating &CD actuators for real time current profile control: assess predictability, in particular for off-axis CD.

• Compare profile control techniques for SSO• Studies of fast particles collective modes in low and

reversed magnetic shear configurations.

HT-7 ASIPP

SSO Issues in HT-7• 400s plasma(50kA, 0.7E19, 1.0keV)• AC operation (N.Fish, 1987, ne, IBW, LH)• SS H-mode: (Ip=120kA, ne=1.5, vp=0)• 50% bootstrap, 50% non-inductive drive

HT-7 ASIPP

PSI: High Priority Research Areas: recommendations for 2004/2005

• Understanding the effect of ELMs/disruptions on divertor and first wall structures,

• Tritium retention & the processes that determine it,• Improve understanding of SOL plasma interaction with the main chamber,• Better prescription of perpendicular transport coefficients and boundary

conditions for input to BPX modeling.• Medium-Term• SOL transport (parallel and drift) & influence on C transport, High-Z materials

- operational experience,• Improve our understanding of processes that determine the core impurity level,• The impact of the simultaneous use of different materials (e.g. tritium

retention).

PSI: High Priority Research Areas: recommendations for 2004/2005

• Fueling comparison across machines• Material migration• emphasis on C13 injection experiments and flow measurements• Role of divertor geometry in affecting performance (exp’t and

theory)• Dust• Model of movement + summary of existing knowledge• Tritium removal• update primarily on flash lamp results,• new results on T codeposition on tile sides

HT-7 ASIPP

PWI issues in HT-7

• 2-3 possible invite talks topics:

• 1. Hydrogen removing by Oxidation

• 2. Real-time recycling and wall material recovery(coating) for long duration discharge.

• 3. Retention and erosion for SSO.

HT-7 ASIPP

Hydrogen removing by Oxidationref.Fedirich, NF

• Target:applicability method for ITER

• O2 RF conditioning( PRF>50kW, P>0.1Pa)

• O2/He RF conditioning (best ratio)

• D2 RF+He RF, mainly for between shots

• Prediction for EAST and experiments

• Prediction for ITER

HT-7 ASIPP

Real-time recycling and wall material recovery

• Wall saturation and de-saturation control:• a. Gas injection(He,neon), • b. Movable Solid Li (Ti) limiter• c. Position control• Real-time wall coating:

• a. SiH4, Boron gas

• b. Movable Solid Li (Ti) limiter

HT-7 ASIPP

Retention and erosion for SSO

• The distribution of H retention, different wall temperature, especially after wall saturation

• Comparison between the modeling and the experimental data for the erosion of C and W

• Erosion of Ferritic steel and CLAN for the the possibility as PFM,as first mirror for example, and comparison with W.

PSI issues in HT-7• Oral and interesting topics:• Recycling behavior for SSO• First mirror(CLAN or Ferritic steel)• Real-time measurement of first wall deposition.• Edge plasma property for IBW improved

confinement plasma.• Impurity evolution for steady-state

operation( from wall, limiter)• Real-time measurement of GMS and its relation

with wall conditions.

HT-7 ASIPP

Integrated high performance

Real-time MHD suppression(LHCD,IBW,GP)

Synergy between LHCD and IBW

The properties of IBW induced

Improved confinement

The role of Zonal flow under

Improved confinement plasma

Synergy of LHCD+ICRF.

HT-7 ASIPP

如何实现这些目标• 精心组织：三个物理组（考虑与 ITPA, 上轮分组及运行组密切关联，每个组有几个小组，博士生必须参加，鼓励硕士生参加）、实验计划的精心安排（如 JET 、 JT-60 、 DIII-D 等）

• 不断学习和讨论，创造一个不断提高的学术环境 :按物理目标、实验计划分组，每周讨论、资料消化、学术报告、完善实验方案。

• 组织 (助手制 )落实、内容落实（讲课、介绍学习心德、资料共享、实验计划讨论），为 EAST未来作准备。