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首页> 外文期刊>Nuclear fusion >ACCESSIBILITY OF VERY LOW q_a (VLQ) AND ULTRA-LOW q_a (ULQ) DISCHARGES IN THE SINP TOKAMAK
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ACCESSIBILITY OF VERY LOW q_a (VLQ) AND ULTRA-LOW q_a (ULQ) DISCHARGES IN THE SINP TOKAMAK

机译：SINP托卡马克中的非常低q_a（VLQ）和超低q_a（ULQ）放电量

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摘要

Attempts to operate a tokamak at q_a < 2 are normally found to terminate with a major disruption. In the SINP tokamak, however, it has been found possible to operate at q_a < 1 with comparative ease. In this Letter an attempt is made to quantify the rate of current rise required to set up discharges having q_a < 2 and q_a < 1 by comparing the risetime with the resistive diffusion time-scale. It has been observed that discharges with q_a less than a particular value can be obtained if the time taken to cross the previous q_a barrier is less than the resistive diffusion time. When the resistive diffusion time is less than the time taken to cross a particular q_a barrier, it becomes extremely difficult to cross the next lower q_a barrier.
机译：通常发现以q_a <2操作托卡马克的尝试以重大中断而终止。但是，在SINP托卡马克中，已经发现可以比较容易地在q_a <1下运行。在这封信中，试图通过将上升时间与电阻扩散时标进行比较来量化建立q_a <2和q_a <1的放电所需的电流上升速率。已经观察到，如果穿越前一个q_a势垒的时间小于电阻扩散时间，则可以获得q_a小于特定值的放电。当电阻扩散时间小于穿越特定q_a势垒所需的时间时，穿越下一个较低的q_a势垒变得极为困难。

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