共查询到19条相似文献,搜索用时 125 毫秒
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描述了一种新的消色差等时性磁偏转系统.它由二个反对称的预偏磁铁和一个主偏磁铁构成。根据六维传输矩阵导出了系统的消色差和等时性关系式.该系统具有优良的消色差性、等时性和良好的聚焦特性。这种结构紧凑的三磁铁偏转系统适用于自由电子激光器的束流传输。 相似文献
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宽谱段光学系统消二级光谱的设计 总被引:1,自引:0,他引:1
利用修正的部分色散(P)和阿贝数(V)公式,计算一些典型的普通光学玻璃在450nm~950nm波段的色散特性,应用二级光谱理论,采用普通光学材料,设计了一个复消色差系统,分析近红外波段光学系统的二级光谱特性及校正方法,给出设计实例。设计结果表明:在可见光近红外波段,采用重冕玻璃ZK4、ZK8和特种火石玻璃TF3组合实现了二级光谱色差的校正,即从理论的0.18mm减少到0.084mm,证明该系统有较好的消色差能力,并且具有较长的后截距,为安装像移补偿反射镜提供了方便。 相似文献
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多级衍射元件在衍射望远系统消色差领域的应用逐渐成为热点。基于赛德尔三级像差理论,对由多级衍射光学元件、折射光学元件和菲涅耳衍射元件三元件组合的光学系统展开分析。在400~700 nm工作波段,通过数学推导校正表面系统的球差,同时实现消色差及复消色差。对系统在平面、球面和非球面不同面型下的成像质量进行比对。当系统为非球面设计时,调制传递函数在截止频率50 lp/mm处高于0.6683,优于平面和球面设计,衍射圈入能量更高,成像质量更好。该研究为将多级衍射元件组合系统运用到消色差领域提供了参考。 相似文献
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在三元复合式消色差波片设计的基础上,对拓宽消色差范围的重要因素——单波片延迟量和复合角度进行了进一步分析和测试,提出了优化设计方案;利用石英晶体设计了适用于红外光通信波段的复合消色差波片。理论和实验均表明:通过调整单波片延迟量或改变复合角度可使该波片在中心波长为1 400 nm的900 nm~1 800 nm波长范围内最大延迟偏差≤5%,而在光通信波段(1 200 nm~1 600 nm)该复合波片的最大延迟偏差只有3.2%。 相似文献
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为解决普通生物显微物镜视场小、场曲和色差严重的问题,本文利用光学软件Code V设计了一款20×平场复消色差显微物镜,通过合理的结构优化、光焦度分配及材料选择,使该物镜具有大视场、高数值孔径、平场复消色差的特点。设计分析结果表明,该物镜平场数为0.11 μm,最大焦移量为0.5 μm,满足显微物镜国际标准的规定;光学传递函数(MTF)曲线与理论衍射极限接近,达到指标要求,该物镜在可见光范围内实现了平场复消色差设计。公差分析结果表明RMS波前差劣化至0.24λ,能够满足加工和实际应用要求。 相似文献
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讨论了利用二元光学元件实现红外光学系统消热差的原理和方法,分析了二元光学元件的色散特性及其在校正二级光谱中的优越性,给出了实现复消色差和超常温消热差的混合红外光学系统设计实例.该系统焦距100mm,相对孔径1/2,视场角6°,工作波段8—11μm;采用了两种最常用的硅和锗材料,共三片,结构简单.在-80—200℃的超宽温度范围内,成像质量稳定并达到衍射极限,约在系统0.7孔径处轴向像差曲线基本相交于一点,实现了系统的复消色差.
关键词:
红外光学系统设计
消热差
复消色差
折射/衍射混合光学系统 相似文献
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A superconducting linear accelerator (LINAC) to boost the energy of the heavy ion beams from the 14 UD pelletron accelerator
at Mumbai is under development. The booster is based on quarter wave resonators (QWR) coated with lead which is superconducting
at liquid helium temperature. The operating frequency is 150 MHz. Four resonators each are mounted in a cryostat module built
indigenously. A total of seven such modules arranged in two arms with an isochronous and achromatic beam bend in the middle
comprises the full LINAC. The transverse focusing of the beam through the LINAC is carried out using periodic quadrupole doublet
magnets operating at room temperature. The present status of the project is described. 相似文献
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SHENG Li-Na SONG Ming-Tao ZHANG Xiao-Qi YANG Xiao-Tian GAO Da-Qing HE Yuan ZHANG Bin LIU Jie SUN You-Mei DANG Bing-Rong LI Wen-Jian SU Hong MAN Kai-Di GUO Yi-Zhen WANG Zhi-Guang ZHAN Wen-Long 《中国物理C(英文版)》2009,33(4):315-320
A state-of-the-art high energy heavy ion microbeam irradiation system is constructed at the Institute of Modern Physics of the Chinese Academy of Sciences. This microbeam system operates in both full current intensity mode and single ion mode. It delivers a predefined number of ions to pre-selected targets for research in biology and material science. The characteristic of this microbeam system is high energy and vertical irradiation. A quadrupole focusing system, in combination with a series of slits, has been designed to optimize the spatial resolution. A symmetrically achromatic system leads the beam downwards and serves simulta-neously as an energy analyzer. A high gradient quadrupole triplet finally focuses a C6+ ion beam to 1 μm in the vacuum chamber within the energy range from 10 MeV/u to 100 MeV/u. In this paper, the IMP microbeam system is described in detail. A systematic investigation of the ion beam optics of this microbeam system is presented together with the associated aberrations. Comparison is made between the IMP microbeam system and the other existing systems to further discuss the performance of this microbeam. Then the optimized initial beam parameters are given for high resolution and high hitting efficiency. At last, the experiment platform is briefly introduced. 相似文献
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根据HL-2M装置5MW-NBI加热束线总体设计参数、注入器的部件空间布局、几何汇聚特点等,建立了基于8饼线圈的注入器偏转磁体3D模型。利用电磁场模拟软件CST Studio详细模拟了注入器的偏转磁体产生的偏转磁场分布,不同成份离子束的偏转轨迹。在模拟分析结果的基础上优化了偏转磁体的物理结构,完成了磁体的工程设计、加工和测试。偏转磁体的磁场测试结果表明,测试值与CST计算值的偏差小于±5%,达到注入器偏转磁体设计要求。 相似文献
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A Penning surface H- ion source test stand has been developed for the China Spallation Neutron Source (CSNS) at the Institute of High Energy Physics (IHEP). H- beams with a current up to 50 mA and a pulse length up to 520μs at a repetition rate of 25 Hz are obtained at present. In order to improve the extraction system based on both the results of the emittance measurements in experiment and the simulation results of the effect of the extraction system on the beam emittance, three dimensional electromagnetic finite element analysis and particle tracking are undertaken. First, the magnetic field of the deflecting magnet is studied in detail, and then the effect of the extraction geometry on the beam transport is also investigated. 相似文献
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A pilot experiment for mass measurement at CSRe 总被引:1,自引:0,他引:1
TU Xiao-Lin XU Hu-Shan XIA Jia-Wen WANG Meng MAO Rui-Shi YUAN You-Jin HU Zheng-Guo LIU Yong ZHANG Hong-Bin ZANG Yong-Dong ZHAO Tie-Cheng ZHANG Xue-Ying FU Fen YANG Jian-Cheng MAO Li-Jun XIAO Chen XIAO Guo-Qing ZHAO Hong-Wei ZHAN Wen-Long 《中国物理C(英文版)》2009,33(7)
A pilot experiment of mass measurement was performed at CSRe with the method of isochronous mass spectrometry. The secondary fragments produced via RIBLL2 with the primary beam of 400 MeV/u 36Ar delivered by CSRm were injected into CSRe. The revolution periods of the stored ions, which depend on the mass-to-charge ratios of the stored ions, were measured with a time-of-flight detector system. The results show that the mass resolution around 8×10-6 for Δm/m is achieved. 相似文献
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A pilot experiment for mass measurement at CSRe 总被引:2,自引:1,他引:1
A pilot experiment of mass measurement was performed at CSRe with the method of isochronous mass spectrometry. The secondary fragments produced via RIBLL2 with the primary beam of 400 MeV/u ^36Ar delivered by CSRm were injected into CSRe. The revolution periods of the stored ions,which depend on the mass-to-charge ratios of the stored ions,were measured with a time-of-flight detector system. The results show that the mass resolution around 8×10^-6 for △m/m is achieved. 相似文献
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SHI Jia-Ru CHEN Huai-Bi TANG Chuan-Xiang HUANG Wen-Hui DU Ying-Chao ZHENG Shu-Xin REN Li 《中国物理C(英文版)》2008,32(10)
RF deflecting cavity can be used for bunch length measurement and is designed to diagnose the beam produced by the photocathode electron gun which was built at Tsinghua University for the Thomson scattering experiment.Detailed discussion and calculation for measuring the 3.5 MeV bunch and another with further acceleration to 50 MeV,which is under development,are presented.A standing-wave deflecting cavity working at 2856 MHz is designed and the power feeding system has been planned. 相似文献