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首页> 外文期刊>Nuclear fusion >Reduced core transport in T-10 and TEXTOR discharges at rational surfaces with low magnetic shear
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Reduced core transport in T-10 and TEXTOR discharges at rational surfaces with low magnetic shear

机译：在低磁剪的合理表面上减少T-10和TEXTOR放电中的铁心传输

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It has been observed in the T-10 tokamak that immediately after off-axis electron cyclotron resonance heating (ECRH) switch-off, the core electron temperature stays constant for some time, which can be as long as several tens of milliseconds, i.e. several energy confinement times (TE), before it starts to decrease. Whether or not the effect is observed depends critically on the local magnetic shear in the vicinity of the q = 1 rational surface, which should be close to zero. It is hypothesized that a small shear can induce the formation of an internal transport barrier. Measurements of density fluctuations in the transport barrier with a correlation reflectometer show immediately after the ECRH switch-off a clear reduction in the fluctuation level, corroborating the above results. The delayed temperature decrease has also been observed in similar discharges in the TEXTOR tokamak; however, the delay is restricted to ～ 1 × τ{sub}E.
机译：已经观察到在T-10托卡马克中，离轴电子回旋共振加热（ECRH）关闭后，核心电子温度会保持恒定一段时间，该时间可能长达几十毫秒，即几毫秒。能量限制时间（TE），然后开始减少。是否观察到这种影响主要取决于q = 1有理表面附近的局部磁剪切，该剪切应接近于零。据推测，小的剪切力可以诱导内部运输壁垒的形成。使用相关反射仪对传输屏障中密度波动的测量表明，在ECRH关闭后，波动水平会明显降低，从而证实了上述结果。在TEXTOR托卡马克的类似放电中也观察到了延迟的温度下降。但是，延迟被限制为〜1×τ{sub} E。

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