共查询到20条相似文献,搜索用时 0 毫秒
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M. V. Kartikeyan E. Borie B. Piosczyk O. S. Lamba V. V. P. Singh A. Mobius 《International Journal of Electronics》2013,100(6):709-723
This paper deals with the conceptual design of a 42 GHz, 200 kW continuous wave gyrotron operating in the TE 5,2 mode with radial output coupling. The basic motivation and selection criteria are discussed and the design of the resonant cavity, magnetron injection gun, radio frequency (RF) guiding system, quasioptical output coupler and RF window is presented. 相似文献
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J. J. Choi 《Journal of Infrared, Millimeter and Terahertz Waves》1998,19(12):1681-1691
A design study of a high efficiency/gain gyroklystron amplifier is performed to demonstrate amplified radiation power of 200kW operating at 28GHz. A key design feature of the present gyroklystron amplifier is that the amplifier is designed to be high gain so that it can be saturated by a low power solid state power amplifier. A non-linear, time-dependent, large signal numerical code is used to predict tube performance. Simulations predict that a stable amplifier radiation power of 214kW is produced with a saturated gain of 54dB, an electronic efficiency of 37%, and a frequency bandwidth of 0.3% from a five-cavity gyroklystron amplifier. The amplifier gain is found to be very sensitive to a beam velocity spread. 相似文献
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S. H. Lee J. J. Choi W. K. Han S. W. Baek 《Journal of Infrared, Millimeter and Terahertz Waves》1999,20(12):2011-2022
A design study of a double-anode magnetron-injection-gun is performed to incorporate the electron gun into a high power 28GHz gyroklystron amplifier operating at 70kV and 8.2A. The electron gun is designed to be used in a tapered magnetic field in the cathode region produced from an iron-free superconducting magnet. An electron trajectory code predicts a beam axial velocity spread of 5.9% at α = 1.5, 70kV, 8.2A and 10.4kG, which is a high quality electron beam suitable for the high gain, high efficiency, five-cavity gyroklystron amplifier. The successful design of the high quality electron gun is attributed to a longer gap between the modulating anode and the grounded anode compared with the case of the first 28GHz electron gun built with an iron enclosed electromagnet. 相似文献
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W波段的高功率连续波回旋管振荡器在毫米波非致命武器等领域有着重要的应用。该文首先通过起振电流的计算,确定了工作模式,继而利用自行开发的自洽非线性计算程序GYROSC对工作在94GHz频率的连续波回旋振荡管高频系统进行了模拟计算和优化设计。结果表明,设计的W波段连续波回旋管可获得输出功率40kW,电子效率大于30%。 相似文献
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K. G. Kostov J. J. Barroso 《Journal of Infrared, Millimeter and Terahertz Waves》1998,19(11):1513-1521
A high-power transit-time oscillator producing 110kW at 5.7GHz in the TM010 cavity mode is described. The device comprises a temperature-limited diode electron gun operating at 40A in the range from 28kV to 35kV and an intermediate coaxial cavity from which the microwave power is extracted through a TEM coaxial guide. The diode serves also as a resonant cavity, where electromagnetic oscillations are grown from noise. The effect of the applied voltage on both the output microwave power and the instability saturation time has been investigated leading to an optimal diode voltage of 33kV. 相似文献
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P.-K. Liu E. Borie M. V. Kartikeyan 《Journal of Infrared, Millimeter and Terahertz Waves》2000,21(12):1917-1943
The preliminary design of a moderate (25-50 kW) gyrotron operating at the ISM (industrial, scientific, medical) frequency of 24.1 GHz is presented. Operation at the second harmonic is considered so that one can obtain radiation at the given frequency with only half the magnetic field required. 相似文献
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Ken Kajiwara Atsushi Kasugai Yasuihisa Oda Koji Takahashi Keishi Sakamoto Calorine Darbos Mark Henderson 《Journal of Infrared, Millimeter and Terahertz Waves》2011,32(3):329-336
Using the ITER relevant 170 GHz gyrotron, repetitive operation with long pulse and high power is conducted. The first consecutive
days repetitive operation with ITER equivalent condition (800 kW/600 s with 20 min interval) is successfully performed in
JAEA gyrotron test stand in order to obtain a basic data of the reliability of the current gyrotron system. Seventy-two shots
out of 88 shots were successfully continued until the end of the pulse (600 s). The successful rate was 82%. The results demonstrate
the feasibility of gyrotron operating at a high reliability for high power long pulse operation for ITER like conditions. 相似文献
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采用几何光学模型研究并设计了一个由Vlasov矩形开口辐射器和两级曲面反射器组成的太赫兹回旋管准光模式变换器。利用几何光学理论对Vlasov型准光模式变换器进行了初步设计,采用矢量绕射理论对准光模式变换器进行了详细的分析并编写相应程序,最后结合具体设计参数,得到工作模式在模式变换器中的变换过程。模拟结果表明,太赫兹回旋管中的TE0.6模式在输出窗处被转换为能量集中的准Gauss波束,其效率为89.0%。 相似文献
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R. J. Temkin K. E. Kreischer W. J. Mulligan S. MacCabe H. R. Fetterman 《Journal of Infrared, Millimeter and Terahertz Waves》1982,3(4):427-437
The design and operation of a 100 kW, 140 GHz pulsed gyrotron are reported. To our knowledge, this is the highest frequency at which high gyrotron output power (>-100 kW) has been achieved. Results are presented for gyrotron operation in the range of magnetic field from 4 to 7 T, voltage from 23 to 80 kV and current up to 7.5 A. Near a value of magnetic field of 5.4 T, and output power of 100 kW was obtained at 140.4 GHz in single mode operation in the TE031 resonator mode. 相似文献
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A new type of complex cavity structure is used to improve the selectivity of modes in gyrotron resonant cavity with a rational position of inter-cavity wall and the shape of coupling holes between inter- and outer-cavities. The resonant characteristics of the complex cavity operating in TE021/TE031 mode at Ka frequency band are simulated and analyzed with Ansoft HFSS code, which shows that mode competition can effectively be alleviated with the cavity structure and it may be useful to the formation of clustered-cavity for extending interaction frequency bandwidth. 相似文献
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P. V. Krivosheev V. K. Lygin V. N. Manuilov Sh. E. Tsimring 《Journal of Infrared, Millimeter and Terahertz Waves》2001,22(8):1119-1145
Potentialities of different numerical models for calculation of helical electron beams parameters are analyzed. The most simple and economical with respect to the calculation time static mono-velocity model, as well as the model considering initial velocities of electrons and the dynamic model based on the PIC-method and on the quasi-static concept of the electric field are described. The main physical results obtained on the basis if each model mentioned above are given. 相似文献
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M. V. Kartikeyan E. Borie M. Thumm 《Journal of Infrared, Millimeter and Terahertz Waves》2007,28(8):611-619
A design concept of a 250 GHz, ≈ 50 W, CW, second harmonic gyrotron for spectroscopy will be presented in this paper. Mode competition, in particular with regard to competition with first harmonic modes, and mode selection procedures are carefully investigated by considering various candidate modes and the TE6,2 and TE6,3 modes are chosen as probable operating modes. Cold cavity and self-consistent calculations of power and efficiency are carried out to determine optimum parameters for these two modes. The results indicate that an output power of well over 50 W, CW can be achieved. 相似文献
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Design of a Ka Band 35 kW CW Low-Voltage Harmonic Gyrotron 总被引:1,自引:0,他引:1
Zhi-Hui Geng Pu-Kun Liu Yi Nong Su Shou Xi Xu Qian Zhong Xue 《Journal of Infrared, Millimeter and Terahertz Waves》2010,31(1):41-47
In this paper, a continuous wave (CW) low-voltage second harmonic gyrotron with the conventional cavity has been preliminarily
designed and evaluated with self-consistent nonlinear simulation code and the particle-in-cell code CHIPIC. The simulation
results of the two codes are shown to be in agreement basically. The 35 kW CW output power of the designed harmonic gyrotron
driven by a 25 kV 5.0A electron beam from a magnetron injection gun (MIG) is obtained. The maximum output power and the electronic
efficiency of the gyrotron is about 35 kW and 30% respectively. 相似文献
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N. A. Zavolsky V. E. Zapevalov M. A. Moiseev 《Journal of Infrared, Millimeter and Terahertz Waves》2000,21(9):1381-1395
The opportunity of use of a TE25.10 operating mode for CW 170 GHz/1 MW gyrotron for ITER is estimated. Parameters are optimized to achieve maximum efficiency of the gyrotron with an acceptable Ohmic load on the cavity. The influence of unwanted mode conversion at the output of the resonator, mode competition, electron beam potential depression, ion compensation of the space charge and beam energy recovery is investigated. 相似文献