Chuan Yang 1,2,*Tao Liu 3Kai Hu 1Ye Zhu 1[ ... ]Weiqing Zhang 1,4,*
Author Affiliations
Abstract
1 Institute of Advanced Science Facilities, Shenzhen, China
2 College of Science, Southern University of Science and Technology, Shenzhen, China
3 Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China
4 State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
The development of high-brightness X-ray free electron lasers (XFELs), such as hard X-ray self-seeding free electron lasers and XFEL oscillators (XFELOs), brings a severe challenge to the crystal monochromator due to a strong non-uniform thermal load. The distortion caused by spatial temperature gradients can severely affect the optical performance of crystals. Therefore, this paper presents a model to estimate the performance of non-uniform thermally distorted crystals. The model not only takes into account thermal strain, slope error and incident angle deviation, but also considers temperature-dependent factors such as the Debye–Waller factor and electric susceptibility. Our investigation indicates that the Debye–Waller factor reduces the height and bandwidth of rocking curves, and the impact of the electric susceptibility is tiny. The proposed model can describe the distortion of the reflectivity and transmissivity curves of non-uniform thermally loaded crystals and can be applied in the design of crystal monochromators, crystal splitters, crystal compressors and XFELOs.
crystal monochromator free electron laser thermal load X-ray diffraction 
High Power Laser Science and Engineering
2023, 11(6): 06000e69
Author Affiliations
Abstract
1 Department of Materials Science and Engineering, City University of Hong Kong, City University of Hong Kong, Kowloon Hong Kong SAR 999077, China
2 Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
3 KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
4 Department of Applied Physics, Research Institute for Smart Energy, The Hong Kong Polytechnic University, Kowloon, Research Institute for Smart Energy, Hong Kong SAR 999077, China
5 Agency for Science, Technology, and Research, Institute of Materials Research and Engineering and Institute of Sustainability for Chemicals, Energy and Environment, Technology, Singapore 138634, Singapore
Lithium (Li) is an essential element in modern energy production and storage devices. Technology to extract Li from seawater, which contains ~ 230 billion tons of Li, offers a solution to the widespread concern regarding quantitative and geographical limitations of future Li supplies. To obtain green Li from seawater, we propose an unassisted photoelectrochemical (PEC) Li extraction system based on an III-V-based triple-junction (3J) photoelectrode and a Li-ion selective membrane with only sunlight as an input. A light-harvesting/catalysis decoupling scheme yielded a 3J photoelectrode with excellent light-harvesting and catalysis reaction capabilities and superb stability over the 840 h of the extraction process. It allows the system to successfully enrich seawater Li by 4,350 times (i.e., from 0.18 ppm to 783.56 ppm) after three extraction stages. The overall reaction of the unassisted PEC green Li extraction system achieved 2.08 mg kJ-1 of solar-to-Li efficiency and 3.65% of solar-to-hydrogen efficiency. Photoelectrochemical (PEC) lithium extraction device is designed to explore lithium from seawater for the first time. The PEC cell with a triple-junction (InGaP/GaAs/Ge) photoelectrode and light-harvesting/catalysis decoupling scheme is constructed, offering a suitable operating potential and superb stability to the membrane-based extraction process in the seawater. The device can successfully enrich lithium by 4,350 times (from 0.18 to 783.56 ppm).
PhotoniX
2023, 4(1): 23
作者单位
摘要
1 中国科学院 上海高等研究院 上海同步辐射装置, 上海 201204
2 中国科学院 北京高能物理研究所 北京同步辐射装置, 北京 100049
3 中国科学院大学, 北京 100049
为了精确测量加工、夹持、装调等工艺引起的晶体摇摆曲线的微小变化, 建立了高分辨的在线检测系统。研究了同步辐射实验配置对晶体摇摆曲线的影响。首先利用DuMond图解法定性分析了不同实验配置中光束带宽和角发散的影响, 根据DuMond图解结果和X射线晶体动力学衍射理论, 推导出晶体摇摆曲线宽度的经验公式。然后研究了同步辐射在线检测系统提升角分辨率的方法, 利用高指数面的Si(333)切槽晶体、Si(775)定能量分析晶体抑制光束的带宽和角发散, 调制出高分辨的检测光束。最后在上海光源X光学测试线搭建了检测系统, 测量了Si(111)晶体摇摆曲线并验证了经验公式。实验结果表明, Si(111)晶体摇摆曲线半高宽的测量值4.79″@12.763 keV, 与动力学衍射的理论值4.70″差值在2%以内, 可满足晶体摇摆曲线微小变化的检测需求。
同步辐射 高分辨实验配置 摇摆曲线 色散和消色散 DuMond作图法 synchrotron radiation high energy resolution experiment configuration rocking curve parallel and antiparallel arrangements DuMond diagram 
光学 精密工程
2020, 28(9): 1950
作者单位
摘要
上海微小卫星工程中心, 上海 201210
国内导电滑环在轨寿命在10万转量级, 为验证某型号星载柱式滑环(汇流环)在轨100万转需求下寿命期内的可靠性, 地面对导电滑环进行200万转寿命试验考核, 并测试了寿命试验末期刷丝和刷丝束两种不同刷丝结构形式摩擦副下功率环及信号环的传输可靠性。在真空高低温环境中, 根据在轨不同工况, 模拟星上特定功率以及500 kb/s的CAN, RS422信号, 测试导电滑环功率环供电稳定性及常用信号经过信号环后传输误码, 为导电滑环正样产品配对摩擦副的结构设计提供依据。刷丝束多触点结构形式的导电滑环电平波动率为0.6%, 信号传输误码率为0; 单刷丝结构形式导电滑环电平波动率超过100%, 信号传输误码率为16.1%; 验证了空间应用环境下, 刷丝束结构形式信号环性能优于传统单刷丝的导电滑环。
导电滑环 汇流环 摩擦副 电平波动率 动态接触电阻 信号误码 satellite electric slip ring brush structure friction pair dynamic contact resistance transmission error 
光学 精密工程
2019, 27(9): 2028
Author Affiliations
Abstract
1 State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
2 School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
Microlasers based on high quality (Q) whispering-gallery mode (WGM) resonance are promising low threshold laser sources for bio-sensing and imaging applications. In this Letter, dye-doped polymer microspheres were fabricated by a controlling emulsion solvent evaporation method. WGM lasing with low threshold and high Q factors was realized in an individual microsphere under femtosecond laser pumping. The slight change of environmental relative humidity (RH) can be monitored by measuring the shift of the lasing modes at the exposure of water molecules, which demonstrates the sensitivity is as high as 6 pm/RH%. The results would offer an insight into employing microlasers as sensors.
140.2020 Diode lasers 160.2540 Fluorescent and luminescent materials 
Chinese Optics Letters
2018, 16(8): 081401
作者单位
摘要
中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
为了提高Z箍缩动态黑腔中低密度泡沫柱的装配精度, 基于辅助移动平台和视觉识别工艺的基础上, 对低密度泡沫柱装配的误差源进行了分析与建模。建立设计、加工和装配误差源传递模型和低密度泡沫柱装配同轴度及轴向夹角精度预测模型, 获得各误差源对低密度泡沫柱装配精度的影响大小和规律。最后采用某负载进行了模型的有效性验证, 当泡沫柱粘接随机位置误差较小时, 同轴误差预测值与实测值偏差为001~0.03 mm, 轴向夹角预测值与实测值偏差为0.05°~0.34°。实践表明, 该方法可为低密度泡沫柱装配精度的预测和误差源控制提供一定的理论支撑。
动态黑腔 低密度泡沫柱 误差源 装配方案 精度预测 dynamic hohlraum low density foam column error source assembly program precision prediction 
强激光与粒子束
2016, 28(11): 112002
作者单位
摘要
中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
利用研制平台、激光衍射直径在线表征设备、扫描电子显微镜及力学性能测试设备等对超细钨丝的直径周期调制成型过程及单丝性能进行研究。结果表明,正电压与零电压交替出现的电解腐蚀方法可以用于制备连续型直径周期调制钨丝; 电解电压1.4 V和1.6 V下,100~500 g·L-1的NaOH体系下,钨丝均能表现出较明显的直径周期调制形貌; 电解电压更高时,只有当NaOH浓度低于500 g·L-1时,钨丝才能呈现周期调制的形貌。钨丝电解抛光的质量损失与电流强度和腐蚀时间存在正比关系,在特定条件下超细钨丝的重量损失与电流强度、电解时间二者乘积的比值为5.35×10-5 g·C-1。在电解液质量浓度200 g·L-1,电解电压2.0 V下,以3 s的腐蚀时间制得的直径调制钨丝的粗段直径为12.2 μm,细段直径为9.8 μm,减径率约20%,其单丝断裂力可达0.288 3 N。
超细钨丝 电解腐蚀 周期调制 激光衍射 Z箍缩 ultra-fine W wire electrochemical corrosion modulation laser diffraction Z-pinch 
强激光与粒子束
2016, 28(5): 054101
作者单位
摘要
中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
厚度低于5 μm的AlMg合金箔材可作为带材切割的原材料应用于Z箍缩物理实验。利用热蒸镀方法,通过控制沉积速率在超光滑的NaCl基片上获得了AlMg薄膜,最终在脱膜后获得了厚度低于5 μm的无支撑AlMg箔材。实验对该箔材的厚度均匀性、表面粗糙度、衍射峰位、晶粒尺寸及距表面不同距离下的成份进行了分析表征。实验发现,此热蒸镀法制备的AlMg合金箔材的厚度均匀性优于8%,两面的表面粗糙度均小于180 nm,晶粒尺寸约20 nm; 不同厚度样品的衍射峰位未明显偏移,箔材内应力很小; 不同深度下Mg含量稳定分布,而在箔材表面杂质含量较高,在距表面6 nm以下合金含量达到预期值并趋于稳定。热蒸镀法制得的无支撑AlMg合金箔材具有厚度可控且均匀、成分稳定、内应力小的特点,适用于制备Z箍缩带阵负载。
铝镁合金 热蒸镀 粗糙度 带阵 Z箍缩 AlMg alloy thermal evaporation roughness ribbon array Z-pinch 
强激光与粒子束
2016, 28(2): 022002
作者单位
摘要
中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
根据准球型负载的结构和材料特点及其装配过程中对精度的要求,开展了丝阵和泡沫微球装配技术的研究。并根据准球型负载的丝阵装配技术,进行了丝阵直径约8 mm、钨丝直径约10 μm的丝阵负载装配;利用泡沫微球装配系统进行了直径约3 mm微球与直径约200 μm玻璃纤维的精确装配。准球型负载已成功应用于准球型负载物理试验中,并取得了较为理想的试验结果,有望在惯性约束聚变(ICF)物理试验及准球型负载物理试验中发挥更大的作用。
装配精度 准球型负载 惯性约束聚变 Z箍缩 钨丝 低密度泡沫微球 assembly precision quasi-spherical load inertial confinement fusion Z-pinch tungsten wire low-density foam microspheres 
强激光与粒子束
2014, 26(10): 102002
牛高 1,2,*杨毅 1刘旭东 1朱晔 1[ ... ]周秀文 1
作者单位
摘要
1 中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
2 等离子体物理重点实验室, 四川 绵阳 621900
根据电磁箍缩物理实验需求,设计出了一种具有自适应结构的电磁箍缩铝带阵负载。采用手工裁剪和激光裁剪两种方法来制备铝带,表征了两种方法制备出铝带的边缘形貌,并优选出激光裁剪法做为铝带的裁剪方法。分析了激光裁剪铝带的力学性能,30 mm×1 mm×5 μm的铝带断裂强度约116 cN,延伸率约为1.3%。利用上述铝带成功装配出了具有自适应结构的电磁箍缩铝带阵负载,且其自适量达到了4.5 mm的物理实验需求,可应用于“强光一号”物理实验。
电磁箍缩 铝带阵负载 自适应 力学性能 Z-pinch aluminum cingulum array self-accommodating mechanical performance 
强激光与粒子束
2014, 26(7): 072004

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