ht-7 2005 tasks 李建刚 ht-7 asipp. targets of the campaigns 2 invite talk for 17th psi (2006.5),...
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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。