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Long pulse operation of 170 GHz ITER gyrotron by beam current control

机译:通过束电流控制170 GHz ITER旋流器的长脉冲操作

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In a pulse extension of a high-power gyrotron, a pulse duration was limited by the shift of the oscillation mode caused by a beam current decrease during the shot. The cause of the current decrease is the cathode cooling by the electron beam extraction. To keep the beam current constant, pre-programming control of the input power to the heater was applied. As an initial result, the stable and steady state operation of 1000 s with the output power of 0.2 MW was demonstrated on the 170 GHz gyrotron. Temperatures of the inner components of the gyrotron and cooling waters were constant, and the vacuum pressure was less than 10~(-5) Pa for 1000 s operation, which gives a prospect for CW operation at the higher power.
机译:在大功率回旋管的脉冲扩展中,脉冲持续时间受到由发射期间射束电流减小引起的振荡模式的偏移限制。电流减少的原因是通过电子束提取引起的阴极冷却。为了保持电子束电流恒定,对加热器的输入功率进行了预编程控制。最初的结果是,在170 GHz的回旋加速器上演示了1000 s的稳态和稳态操作,输出功率为0.2 MW。回旋管内部元件和冷却水的温度是恒定的,并且在1000 s操作中真空压力小于10〜(-5)Pa,这为在更高功率下进行CW操作提供了前景。

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