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首页> 外文期刊>Plasma physics and controlled fusion >Dimensionless pedestal identity experiments in JT-60U and JET in ELMy H-mode plasmas
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Dimensionless pedestal identity experiments in JT-60U and JET in ELMy H-mode plasmas

机译：ELMy H型等离子体中的JT-60U和JET中的无量纲基座身份实验

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This paper reports the first results of collaborative experiments in JT-60U and JET to compare ELMy H-mode characteristics in the two machines. The JT-60U/JET identity experiments were aimed explicitly at matching edge pedestal parameters in plasmas of the same geometry. The similar size, of the two devices allows plasma configurations and conditions to, be established for which the match of the dimensionless p trameters (rho*, nu*, beta and q(95)) and of the equilibrium geometry is carried out in plasmas that are also almost identical in dimensional terms.The results of the power and density scans at fixed (and matched) I-p - B-T show that, in a common range of rho*, the pedestal electron collisionality, nu(e)* and normalized pressure, beta(p,ped) do not match in the two machines, against expectations. In particular, the range of beta(p,ped) - of JT-60U ELMy H-modes with Type I ELMs is accessible to JET plasmas only with a Type III ELM edge, and nu(e)*, in JT-60U is consistently higher by approximate to2 than in JET, for the same rho*. A comparison of n(e) and T-e pedestal profiles indicates that delT(e) is comparable in the two devices, while JET n(e) profiles are steeper than JT-60U. The global energy confinement enhancement factor (H98y-2) is higher in JET than in JT-60U, and part of this difference is attributed to the reduced pedestal pressure in JT-60U compared with JET.
机译：本文报告了在JT-60U和JET中进行合作实验以比较两台机器的ELMy H模式特性的第一个结果。 JT-60U / JET身份实验明确地旨在匹配相同几何形状的等离子体中的边缘基座参数。两种装置的尺寸相似，可建立等离子体构型和条件，在等离子体中进行无因次p计（rho *，nu *，β和q（95））与平衡几何形状的匹配在固定的（和匹配的）Ip-BT下，功率和密度扫描的结果表明，在共同的rho *范围内，基座电子碰撞性，nu（e）*和归一化压力，beta（p，ped）在两台计算机中都不匹配，这与预期不符。特别是，具有I型ELM的JT-60U ELMy H模式的beta（p，ped）-范围仅适用于具有III型ELM边缘的JET等离子体，而JT-60U中的nu（e）*为在相同的rh *下，始终比JET高2倍左右。 n（e）和T-e基座轮廓的比较表明，delT（e）在两种设备中具有可比性，而JET n（e）轮廓比JT-60U陡。 JET中的整体能量约束增强因子（H98y-2）高于JT-60U，部分原因是与JET相比，JT-60U的基座压力降低了。

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