CNC Machined Helically Corrugated Interaction Region for a THz Gyrotron Traveling Wave Amplifier
CNC Machined Helically Corrugated Interaction Region for a THz Gyrotron Traveling Wave Amplifier
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DOI：
10.1109/tthz.2017.2778944
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发表时间：
2018-01
影响因子：
3.2
通讯作者：
C. Donaldson;Liang Zhang;M. Beardsley;Michael Harris;P. Huggard;Wenlong He
中科院分区：
文献类型：
--
作者：
C. Donaldson;Liang Zhang;M. Beardsley;Michael Harris;P. Huggard;Wenlong He
本文报道了一个中心频率为0.37 THz的100 W回旋行波管放大器的螺旋波纹互作用区（HCIR）的发展。这HCIR具有42 μ m的振幅，与0.760毫米的标称波导直径。HCIR是由电铸铜上的牺牲铝心轴：后者是精密数控铣削使用0.2毫米直径的球头刀具。测量了HCIR的色散特性，发现与解析计算和数值模拟吻合得很好。测量的插入损耗在2和4 dB之间。
This paper reports the development of a helically corrugated interaction region (HCIR) for a 100 W gyrotron traveling wave amplifier operating at a central frequency of 0.37 THz. This HCIR has a corrugation amplitude of 42 $\mu$m, with a nominal waveguide diameter of 0.760 mm. The HCIR was made by electroforming copper on a sacrificial aluminum mandrel: the latter was precision CNC milled using a 0.2 mm diameter ball nose cutter. The dispersion characteristics of the HCIR were measured and found to be in good agreement with the analytical calculation and numerical simulation. Measured insertion loss was between 2 and 4 dB.