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磁约束装置 等离子体与壁的相互作用 (II) 李建刚 2005/04. 目前该领域的前沿问题 Understanding the effect of ELMs/disruptions on divertor and first wall structures, Tritium retention &

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Presentation on theme: "磁约束装置 等离子体与壁的相互作用 (II) 李建刚 2005/04. 目前该领域的前沿问题 Understanding the effect of ELMs/disruptions on divertor and first wall structures, Tritium retention &"— Presentation transcript:

1 磁约束装置 等离子体与壁的相互作用 (II) 李建刚 2005/04

2 目前该领域的前沿问题 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).

3 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

4 Tore-Supra 近年的研究前沿和重点

5 Urge for ITER TS assets D retention D recovery Laser/flashlamp, O baking/glows, disruptions C migration Chemical erosion, transport, redeposition, dust Conditionning RF, boronisation W PFCs HHF components, melting, mixed materials C PFCs Cycling studies, acceptance criteria SOL transport and turbulence Anomalous perp., parallel flows Wave/SOL coupling Ripple physics Disruptions Heat loads, time scale, mitigation Fuelling Next stage : put priorities on the different topics for instance on the graph below (not done yet on this page !)

6 ASIPP D in-vessel inventory under long pulse Why no wall saturation?

7

8 稳态运行下的重要问题 氢的分布、滞留,特别是在壁饱和条件 下的行为; 再循环的作用、对高约束性能的影响、 控制; 杂质对长脉冲特别是高约束等离子体的 影响; 第一壁材料的腐蚀及再沉积; 材料的辐照损伤。

9 下一代聚变装置中等离子体与表 面的相互作用 在下一代装置中(像 ITER )的运行条件 和环境:放电脉冲时间和工作循环比起 目前的聚变装置将大大延长,高热负荷 以及更为强烈的等离子体破裂。

10 1)High energy content (several hundreds MJ vs. few MJ in current device) and power flow More intense disruptions and disruption-related damage effects;More intense disruptions and disruption-related damage effects; Require an effective reliable way to disperse the power to the divertor surfaces.Require an effective reliable way to disperse the power to the divertor surfaces. 2)Long pulse duration (few hundreds s vs. fews in current devices) require active cooling of PFCs and vessel structure and technique to pumping He ash ; require active cooling of PFCs and vessel structure and technique to pumping He ash ; Require effective control of plasma purity and PMIs to achieve high plasma performance.Require effective control of plasma purity and PMIs to achieve high plasma performance. 3)High duty factor (3% ~ 10%) or pulse repetition rate Short time for wall conditioning and tritium recovery from co-deposited films;Short time for wall conditioning and tritium recovery from co-deposited films; Remote maintenance with acceptable shot-down times.Remote maintenance with acceptable shot-down times. 4)Long cumulative run time The erosion lifetime (needs to be replaced several times);The erosion lifetime (needs to be replaced several times); Tritium retention and dust (safety problems);Tritium retention and dust (safety problems); Neutron damages effects in the bulk surrounding materials and structures;Neutron damages effects in the bulk surrounding materials and structures; PFM surfaces will be modified by mixing effects;PFM surfaces will be modified by mixing effects; 5)Routine operation with large amount of tritium; 6)Superconducting magnet technology; 7)Fast remote maintenance for repair/ refurbishment of the in-vessel components and some of ex-vessel components; 8) Safety: 未来聚变装置的主要特征和相关的 PMI 问题

11 思考题 为什么要清除器壁中的氧,有哪些方 法? 碳材料作为第一壁材料的主要优缺点 是什么? 对长脉冲放电( 1 分钟到数小时)状 态,最主要的 PWI 是什么,如何解决?


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