Explosive cathode gyrotron experiments
Explosive cathode gyrotron experiments
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爆炸性阴极回旋管实验
DOI：
10.1109/27.700768
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发表时间：
1998
影响因子：
1.5
通讯作者：
S. Spark
中科院分区：
文献类型：
--
作者：
K. Ronald;A. Cross;A. Phelps;Wenlong He;H. Yin;S. Spark
实验研究了使用具有中心定位的刀刃阴极和锥形阳极的圆柱形对称同轴二极管的爆炸发射阴极回旋管的行为。当由 3 /spl mu/s 1/e 时间 Marx 电源（高达 150 kV）驱动时，利用电压探针和分流器来监测二极管的电气行为。时间参考信号允许将二极管的电演化与同时测量的来自回旋管的微波输出信号进行比较。研究发现，微波输出脉冲持续时间取决于二极管间隙间距（范围为 16-27 mm）、腔体磁场（范围为 1.3-3.3 T）和阴极材料，终止是由二极管上加速电势的衰减和二极管几何结构的破坏引起的。石墨、铜和不锈钢阴极的阴极耀斑膨胀速度比率估计为(1:(1.3/spl plusmn/0.2):(2.2/spl plusmn/0.5))，微波输出信号的持续时间相应变化[((590/spl plusmn/17):(414/spl plusmn/25):(325/spl plusmn/10)) ns (2.6 T)]。报告了最近实验的初步结果，这些实验将脉冲回旋管工作期间二极管区域的光发射与同时记录的二极管电行为和回旋管微波输出进行了比较。
Experiments have investigated the behavior of explosive emission cathode gyrotrons using cylindrically symmetric coaxial diodes with centrally located knife-edged cathode and conical anode. Voltage probes and current shunts were exploited to monitor the diode electrical behavior when driven by a 3 /spl mu/s 1/e time Marx power supply (up to 150 kV). Temporal reference signals permitted comparison of the diode's electrical evolution with the simultaneously measured microwave output signal from the gyrotron. The microwave output pulse duration was found to depend on the diode gap spacing (in the range 16-27 mm), the cavity magnetic field (range 1.3-3.3 T) and the cathode material, the termination being caused by the decay of the accelerating potential across the diode and the disruption of the diode geometry. The ratios of the cathode flare expansion velocities for graphite, copper and stainless steel cathodes were estimated as (1:(1.3/spl plusmn/0.2):(2.2/spl plusmn/0.5)) with a corresponding change in the duration of the microwave output signal [((590/spl plusmn/17):(414/spl plusmn/25):(325/spl plusmn/10)) ns at 2.6 T]. Preliminary results are reported of recent experiments which have compared the optical emissions from the diode region during pulsed gyrotron operation with the simultaneously recorded diode electrical behavior and the gyrotron microwave output.