Research progresses on Cherenkov and transit-time high-power microwave sources at NUDT  

作　　者：Jiande Zhang Xingjun Ge Jun Zhang Juntao He Yuwei Fan Zhiqiang Li Zhenxing Jin Liang Gao Junpu Ling Zumin Qi 

机构地区：[1]Laboratory of High Power Microwave Technology,National University of Defense Technology,Changsha 410073,People's Republic of China

出　　处：《Matter and Radiation at Extremes》2016年第3期163-178,共16页极端条件下的物质与辐射（英文）

基　　金：supported by the National Natural Science Funds Fund of China under Grant No.11505288;Provincial Natural Science Foundation of Hunan;scientific effort project of NUDT.

摘　　要：Research progresses on Cherenkov and transit-time high-power microwave(HPM)sources in National University of Defense Technology(NUDT)of China are presented.The research issues are focused on the following aspects.The pulse-shortening phenomenon in O-type Cerenkov HPM devices is suppressed.The compact coaxial relativistic backward-wave oscillators(RBWOs)at low bands are developed.The power efficiency in M-Type HPM tubes without guiding magnetic field increased.The power capacities and power efficiencies in the triaxial klystron amplifier(TKA)and relativistic transit-time oscillator(TTO)at higher frequencies increased.In experiments,some exciting results were obtained.The X-band source generated 2 GW microwave power with a pulse duration of 110 ns in 30 Hz repetition mode.Both L-and P-band compact RBWOs generated over 2 GW microwave power with a power efficiency of over 30%.There is approximately a 75% decline of the volume compared with that of conventional RBWO under the same power capacity conditions.A 1.755 GHz MILO produced 3.1 GW microwave power with power efficiency of 10.4%.A 9.37 GHz TKA produced the 240 MW microwave power with the gain of 34 dB.A 14.3 GHz TTO produced 1 GW microwave power with power efficiency of 20%.

关 键 词：High-power microwave(HPM) Long-pulse O-type Cerenkov source Magnetically insulated line oscillator(MILO) Coaxial relativistic backwardwave oscillator(RBWO) Triaxial klystron amplifier(TKA) Transit-time oscillator(TTO) 

分 类 号：O57[理学—粒子物理与原子核物理]