无增益微通道板时空特性的模拟研究
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摘要
为提高分幅相机的时间分辨率,采用无增益微通道板(microchannel plate,MCP)代替有增益MCP研制分幅相机.利用Monte Carlo方法对无增益MCP的时间分辨特性、渡越时间弥散及空间分辨特性进行了理论研究.结果表明,无增益MCP的时间分辨率随着选通脉冲宽度的减小而提高,无增益MCP中电子的渡越时间弥散小于有增益MCP的渡越时间弥散.无增益MCP变像管的空间分辨率优于有增益MCP变像管的空间分辨率.因而,无增益MCP可以减小电子的渡越时间弥散,获得更好的时间分辨率.
To improve the temporal resolution of the framing camera,a non-gain microchannel plate( MCP) instead of a gain MCP is used to study the framing camera. The temporal resolution,the transit time spread,and the spatial resolution of the non-gain MCP are simulated by using the Monte Carlo method. The simulated results show that the temporal resolution of the non-gain MCP increases with the decrease of the gating pulse width. And the transit time spread in the non-gain MCP is lower than that in the gain MCP. Furthermore,the spatial resolution in the non-gain MCP is better than that in the gain MCP. Therefore,the non-gain MCP could reduce the transit time spread,and obtain the better temporal resolution for the framing camera.
To improve the temporal resolution of the framing camera,a non-gain microchannel plate( MCP) instead of a gain MCP is used to study the framing camera. The temporal resolution,the transit time spread,and the spatial resolution of the non-gain MCP are simulated by using the Monte Carlo method. The simulated results show that the temporal resolution of the non-gain MCP increases with the decrease of the gating pulse width. And the transit time spread in the non-gain MCP is lower than that in the gain MCP. Furthermore,the spatial resolution in the non-gain MCP is better than that in the gain MCP. Therefore,the non-gain MCP could reduce the transit time spread,and obtain the better temporal resolution for the framing camera.
引文
[1]HURRICANE O A,CALLAHAN D A,CASEY D T,et al. Fuel gain exceeding unity in an inertially confined fusion implosion[J]. Nature,2014,506(7488):343-348
[2]PARK H S,HURRICANE O A,CALLAHAN D A,et al.High-adiabat high-foot inertial confinement fusion implosion experiments on the national ignition facility[J].Physical Review Letters,2014,112(5):055001.
[3]TOWN R P J,BRADLEY D K,KRITCHER A,et al.Dynamic symmetry of indirectly driven inertial confinement fusion capsules on the National Ignition Facility[J].Physics of Plasmas,2014,21(5):056313.
[4] MICHEL D T,CRAXTON R S,DAVIS A K,et al.Implosion dynamics in direct-drive experiments[J].Plasma Physics and Controlled Fusion,2015,57(1):014023.
[5]HURRICANE O A,CALLAHAN D A,CASEY D T,et al. The high-foot implosion campaign on the National Ignition Facility[J]. Physics of Plasmas,2014,21(5):056314.
[6]YI Shengzhen,MU Baozhong,WANG Xin,et al. A fourchannel multilayer KB microscope for high-resolution8-keV X-ray imaging in laser-plasma diagnostics[J].Chinese Optics Letters,2014,12(1):013401.
[7]潘京生.微通道板及其主要特征性能[J].应用光学,2004,25(5):25-29.PAN Jingsheng. Microchannel plates and its main characteristics[J]. Journal of Applied Optics,2004,25(5):25-29.(in Chinese)
[8]CAI Houzhi,LIU Jinyuan,PENG Xiang,et al. Largeformat microchannel plate gated framing camera[J].Nuclear Instruments and Methods in Physics Research A,2012,677:14-17.
[9] BELL P M, KILLKENNY J D, HANKS R, et al.Measurements with a 35 psec gate time microchannel plate camera[C]//The 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering. San Diego,USA:SPIE,1990:456-464.
[10]LIU Jinyuan,NIU Lihong,PENG Wenda,et al. Application of a fast electrical pulse in gated multichannel plate camera[J]. Review of Scientific Instruments,2007,78(5):055104.
[11] KILKENNY J D. High speed proximity focused X-ray cameras[J]. Laser and Particle Beams,1991,9(1):49-69.
[12] CAI Houzhi,LIU Jinyuan,NIU Lihong,et al. Monte Carlo simulation for microchannel plate framing camera[J]. Optical Engineering,2010,49(8):080502.
[13]FURMAN M A,PIVI M T F. Probabilistic model for the simulation of secondary electron emission[J]. Physical Review Special Topics-Accelerators and Beams,2002,5(12),124404.
[14] ROCHAU G A, WU M, KRUSCHWITZ C, et al.Measurement and modeling of pulsed microchannel plate operation[J]. Review of Scientific Instruments,2008,79(10):10E902.
[15]蔡厚智,龙井华,刘进元,等.无增益微通道板皮秒分幅技术研究[J].红外与激光工程,2015,44(S):109-112.CAI Houzhi,LONG Jinghua,LIU Jinyuan,et al. Nongain microchannel plate picosecond framing technology[J]. Infrared and Laser Engineering,2015,44(S):109-112.(in Chinese)
[2]PARK H S,HURRICANE O A,CALLAHAN D A,et al.High-adiabat high-foot inertial confinement fusion implosion experiments on the national ignition facility[J].Physical Review Letters,2014,112(5):055001.
[3]TOWN R P J,BRADLEY D K,KRITCHER A,et al.Dynamic symmetry of indirectly driven inertial confinement fusion capsules on the National Ignition Facility[J].Physics of Plasmas,2014,21(5):056313.
[4] MICHEL D T,CRAXTON R S,DAVIS A K,et al.Implosion dynamics in direct-drive experiments[J].Plasma Physics and Controlled Fusion,2015,57(1):014023.
[5]HURRICANE O A,CALLAHAN D A,CASEY D T,et al. The high-foot implosion campaign on the National Ignition Facility[J]. Physics of Plasmas,2014,21(5):056314.
[6]YI Shengzhen,MU Baozhong,WANG Xin,et al. A fourchannel multilayer KB microscope for high-resolution8-keV X-ray imaging in laser-plasma diagnostics[J].Chinese Optics Letters,2014,12(1):013401.
[7]潘京生.微通道板及其主要特征性能[J].应用光学,2004,25(5):25-29.PAN Jingsheng. Microchannel plates and its main characteristics[J]. Journal of Applied Optics,2004,25(5):25-29.(in Chinese)
[8]CAI Houzhi,LIU Jinyuan,PENG Xiang,et al. Largeformat microchannel plate gated framing camera[J].Nuclear Instruments and Methods in Physics Research A,2012,677:14-17.
[9] BELL P M, KILLKENNY J D, HANKS R, et al.Measurements with a 35 psec gate time microchannel plate camera[C]//The 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering. San Diego,USA:SPIE,1990:456-464.
[10]LIU Jinyuan,NIU Lihong,PENG Wenda,et al. Application of a fast electrical pulse in gated multichannel plate camera[J]. Review of Scientific Instruments,2007,78(5):055104.
[11] KILKENNY J D. High speed proximity focused X-ray cameras[J]. Laser and Particle Beams,1991,9(1):49-69.
[12] CAI Houzhi,LIU Jinyuan,NIU Lihong,et al. Monte Carlo simulation for microchannel plate framing camera[J]. Optical Engineering,2010,49(8):080502.
[13]FURMAN M A,PIVI M T F. Probabilistic model for the simulation of secondary electron emission[J]. Physical Review Special Topics-Accelerators and Beams,2002,5(12),124404.
[14] ROCHAU G A, WU M, KRUSCHWITZ C, et al.Measurement and modeling of pulsed microchannel plate operation[J]. Review of Scientific Instruments,2008,79(10):10E902.
[15]蔡厚智,龙井华,刘进元,等.无增益微通道板皮秒分幅技术研究[J].红外与激光工程,2015,44(S):109-112.CAI Houzhi,LONG Jinghua,LIU Jinyuan,et al. Nongain microchannel plate picosecond framing technology[J]. Infrared and Laser Engineering,2015,44(S):109-112.(in Chinese)