Broadband Amplification of Low-Terahertz Signals Using Axis-Encircling Electrons in a Helically Corrugated Interaction Region.
Broadband Amplification of Low-Terahertz Signals Using Axis-Encircling Electrons in a Helically Corrugated Interaction Region.
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DOI：
10.1103/physrevlett.119.184801
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发表时间：
2017-10
影响因子：
8.6
通讯作者：
Wenlong He;C. Donaldson;Liang Zhang;K. Ronald;A. Phelps;A. Cross
中科院分区：
文献类型：
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作者：
Wenlong He;C. Donaldson;Liang Zhang;K. Ronald;A. Phelps;A. Cross
介绍了一种工作在（75 ~ 110）ghz频段、基于螺旋波纹相互作用区域的宽带、高功率回旋管行波放大器（gyrotron行波放大器）的实验结果。利用55 kev， 1.5 a，绕轴电子束的二次谐波回旋模式与旅行的TE_{21}样本征波发生共振相互作用，实现宽带放大。在实验测量中，陀螺- twa显示了至少5.5 GHz的3db增益带宽，其中9 GHz是宽带驱动源，测量的不饱和输出功率为3.4 kW，增益为36-38 dB。这种方法可能允许陀螺- twa在1thz下工作。
Experimental results are presented of a broadband, high power, gyrotron traveling wave amplifier (gyro-TWA) operating in the (75-110)-GHz frequency band and based on a helically corrugated interaction region. The second harmonic cyclotron mode of a 55-keV, 1.5-A, axis-encircling electron beam is used to resonantly interact with a traveling TE_{21}-like eigenwave achieving broadband amplification. The gyro-TWA demonstrates a 3-dB gain bandwidth of at least 5.5 GHz in the experimental measurement with 9 GHz predicted for a wideband drive source with a measured unsaturated output power of 3.4 kW and gain of 36-38 dB. The approach may allow a gyro-TWA to operate at 1 THz.