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EXPLORATION OF SPHERICAL TORUS PHYSICS IN THE NSTX DEVICE

机译:NSTX设备中球面环物理的探索

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The National Spherical Torus Experiment (NSTX) is being built at PPPL to test the fusion physicsrnprinciples for the ST concept at the MA level. The NSTX nominal plasma parameters are R0 = 85 cm,rna = 67 cm, R/a ≥ 1.26, B_T = 3 kG, I_p = 1 MA, q_(95) = 14, elongation k ≤ 2.2, triangularity δ ≤ 0.5, andrnplasma pulse length of up to 5 sec. The plasma heating / current drive (CD) tools are High HarmonicrnFast Wave (HHFW) (6 MW, 5 sec), Neutral Beam Injection (NBI) (5 MW, 80 keV, 5 sec), andrnCoaxial Helicity Injection (CHI). Theoretical calculations predict that NSTX should provide excitingrnpossibilities for exploring a number of important new physics regimes including very high plasmarnbeta, naturally high plasma elongation, high bootstrap current fraction, absolute magnetic well, andrnhigh pressure driven sheared flow. In addition, the NSTX program plans to explore fully noninductivernplasma start-up as well as a dispersive scrape-off layer for heat and particle flux handling.
机译:PPPL正在建立国家球形圆环实验(NSTX),以在MA级别测试ST概念的融合物理原理。 NSTX标称血浆参数为R0 = 85 cm,rna = 67 cm,R / a≥1.26,B_T = 3 kG,I_p = 1 MA,q_(95)= 14,伸长率k≤2.2,三角形δ≤0.5,并且质膜脉冲长度最长为5秒。等离子加热/电流驱动(CD)工具是高谐波快速波(HHFW)(6 MW,5 sec),中性束注入(NBI)(5 MW,80 keV,5 sec)和同轴螺旋注入(CHI)。理论计算预测,NSTX应该为探索许多重要的新物理机制提供令人兴奋的可能性,包括非常高的等离子体beta,自然地高的等离子体伸长率,高的自举电流分数,绝对磁阱和高压驱动的剪切流。此外,NSTX计划计划探索完全非感应等离子体的启动以及用于热和颗粒通量处理的分散刮除层。

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