共查询到19条相似文献,搜索用时 93 毫秒
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提出了热阴极微波电子枪的设计中可以通过缩短腔长减小电子反轰功率,并通过模拟计算详细研究了腔长对电子反轰及枪出口束流品质的影响。 相似文献
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柏伟黎明王汉斌杨兴繁单李军张浩刘宇 《强激光与粒子束》2013,(B05):133-136
为开展自由电子激光太赫兹技术研究,研制出利用两路微波馈入的独立调谐热阴极微波电子枪,建立了热测实验装置,并进行了束流测试和电子反轰效应的热测实验研究。实验结果表明,该微波电子枪出口处束流强度可超过500mA,电子反轰效应随着首腔电场的相位和幅度调节发生显著变化。 相似文献
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为了研制紧凑型自由电子激光装置,开展自由电子激光太赫兹技术研究,需要研制微波电子枪作为高品质电子束源,为此,中国工程物理研究院研制了独立调谐热阴极微波电子枪。在前期进行了初步热测实验的基础上,通过改进实验环境、优化实验参数,进一步开展大量实验,深入研究了热阴极微波电子枪的热测实验结果。实验结果表明:微波电子枪出口处束流强度可超过500 mA,电子反轰效应随着首腔电场的相位和幅度调节发生显著变化。该热阴极微波电子枪已经应用于紧凑型自由电子激光装置。 相似文献
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中国工程物理研究院紧凑型自由电子激光太赫兹源装置采用了两路微波独立调谐热阴极微波电子枪作为注入器,一路由首腔馈入激励首腔和实现阴极表面建场并引出电子,另一路由后续腔馈入并通过腔间耦合激励各腔,两路微波互不耦合。对于这种微波激励方式,微波电子枪首腔的电场相位和幅度在实验中均可调节,因此可以通过实验研究来优化微波电子枪的工作参数,从而减小热阴极微波电子枪的电子反轰效应,提高束流品质。介绍了该热阴极微波电子枪热测实验研究的最新结果,通过BCT测得微波电子枪出口处束流强度超过400 mA,电子反轰效应随着首腔电场的相位和幅度调节发生显著变化,这些指标和实验现象与理论研究结果较为吻合。 相似文献
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To meet the requirements of high performance THz-FEL (Free Electron Laser), a compact scheme of FEL injector was proposed. A thermionic cathode was chosen to emit electrons instead of a photo-cathode with its complex structure and high cost. The effective bunch charge was improved to ~200 pC by adopting an enhanced EC-ITC (External Cathode Independently Tunable Cells) RF gun to extract micro-bunches; back bombardment effects were almost eliminated as well. Constant gradient accelerator structures were designed to improve energy to ~14 MeV, while the focusing system was applied for emittance suppressing and bunch state maintenance. The physical design and beam dynamics of the key components for the FEL injector were analyzed. Furthermore, start-to-end simulations with multi-pulses were performed using homemade MATLAB and Parmela. The results show that continual high brightness electron bunches with a low energy spread and emittance could be obtained stably. 相似文献
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To meet the requirements of high performance THz-FEL (Free Electron Laser), a compact scheme of FEL injector was proposed. A thermionic cathode was chosen to emit electrons instead of a photo-cathode with its complex structure and high cost. The effective bunch charge was improved to ~200 pC by adopting an enhanced EC-ITC (External Cathode Independently Tunable Cells) RF gun to extract micro-bunches; back bombardment effects were almost eliminated as well. Constant gradient accelerator structures were designed to improve energy to ~14 MeV, while the focusing system was applied for emittance suppressing and bunch state maintenance. The physical design and beam dynamics of the key components for the FEL injector were analyzed. Furthermore, start- to-end simulations with multi-pulses were performed using homemade MATLAB and Parmela. The results show that continual high brightness electron bunches with a low energy spread and emittance could be obtained stably. 相似文献
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高重复频率、高平均流强的电子枪具有十分广泛的应用。设计了一台束团重复频率为325 MHz在CW模式工作的微波栅控高压型热阴极电子枪,并详细论述了该类型微波栅控电子枪的实验原理。在该类型电子枪的设计中,首先需要利用仿真模拟软件EGUN、POISSON(PoissonSuperfish)、GPT(General Particle Tracer)完成300 kV直流高压电子枪的结构设计,并进行束流动力学验证计算。为将微波馈入该直流电子枪的阴栅极之间,进行了该微波栅控电子枪的供电系统设计,完成了从射频功率源到同轴热阴极的阻抗匹配方案,设计了一种325 MHz双模式同轴供电器件,并进行了验证与分析。 相似文献
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In this paper, we present the simulation results of a 1.6 cell X-band photocathode RF gun for ultra-low emittance electron beams. It will work at 9.3 GHz. The emittance, bunch length, electron energy and energy spread at the gun exit are optimized at bunch charge of 1pC using PARMELA. Electron bunches with emittance about 0.1 mm·mrad and bunch length less than 100 fs can be obtained from this gun. A PITZ type coupler is adopted in this gun and an initial simulation by MAFIA is also given in this paper. 相似文献
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In this paper, we present the simulation results of a 1.6 cell X-band photocathode RF gun for ultra-low emittance electron beams. It will work at 9.3 GHz. The emittance, bunch length, electron energy and energy spread at the gun exit are optimized at bunch charge of 1pC using PARMELA. Electron bunches with emittance about 0.1 mm·mrad and bunch length less than 100 fs can be obtained from this gun. A PITZ type coupler is adopted in this gun and an initial simulation by MAFIA is also given in this paper. 相似文献