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研究了铁电材料的电子发射特性,根据实验和数值模拟结果给出了铁电发射特性的定性解释,并指出目前的几种铁电发射理论都不足以完备地解释各种实验现象。设计了Pierce型铁电阴极电子枪,实现了束流的二级压缩,其总束流大于100 A。在此基础上,分析和设计了具有盘荷波导慢波结构的相对论行波管,得到了带宽500 MHz,增益约25 dB的X波段行波放大输出。
The electron emission characteristics of ferroelectric materials were studied. According to the experimental and numerical simulation results, the qualitative explanation of the ferroelectric emission characteristics was given. It was pointed out that the current theories of ferroelectric emission are not enough to fully explain various experimental phenomena. The Pierce-type ferroelectric cathode gun was designed to achieve a two-stage compression of the beam with a total beam current greater than 100 A. On this basis, the relativistic traveling wave tube with the waveguide-guided slow-wave structure is analyzed and designed, and the amplified output of X-band traveling wave with a bandwidth of 500 MHz and a gain of about 25 dB has been obtained.