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摘要
相干X射线衍射成像方法是一种先进的成像技术, 分辨率可达纳米量级. 国际上大多数的同步辐射装置和自由电子激光装置都建立了该成像方法, 并有将其作为主要成像技术的趋势. 上海光源作为目前国内唯一的一台第三代同步辐射光源, 尚未建立基于硬X射线的相干衍射成像实验平台. 随着一批以波荡器为光源的光束线站投入使用, 使得该方法的建立成为了可能. 本文基于上海光源BL19U2生物小角散射线站, 通过有效的光路设计, 搭建了相干衍射实验平台, 在12 keV和13.5 keV能量点均获得了硬X射线相干光束, 并基于小孔衍射测量了入射光束的空间相干长度. 该平台支持常规和扫描相干衍射实验模式, 对小孔衍射图样及波带片扫描衍射图样实现了正确的相位重建, 证明了该平台初步具备开展硬X射线相干衍射成像实验的能力. 硬X射线相干衍射成像实验平台为国内首次建立, 将为国内该实验方法的发展和应用提供有效的软硬件支持.-
关键词:
- 同步辐射 /
- 相干衍射成像 /
- 相干性 /
- 相位重建
Abstract
Coherent X-ray diffraction imaging (CDI) method is a powerful X-ray imaging technique with high resolution up to nanometer scale. Most of the synchrotron radiation facilities and free electron laser facilities are equipped with this state-of-the-art imaging technique and have made many outstanding achievements in multiple scientific areas. Up to now, although scanning CDI (ptychography) method based on a soft X-ray source has been opened to users, the hard X-ray CDI experimental platform has not been built at Shanghai Synchrotron Radiation Facility (SSRF) which can research some relatively thick specimens and easily extend to three-dimensional imaging. As some new beamlines with undulator source were put into operation recently, it is possible and feasible to build up the CDI experimental platform with hard X-ray. In this article, we report the hard X-ray CDI experimental platform development process and preliminary experimental results of coherent diffraction pattern and image reconstruction at SSRF. Based on the operating BL19U2 biological small-angle X-ray scattering (SAXS) beamline at SSRF, the hard X-ray coherent beam is obtained through effective optical path designation at 12 keV and 13.5 keV. The hard X-ray optimization includes tuning several slits, double crystal monochromator (DCM), horizontal deflection mirror, focusing mirror system and pinhole, etc. Furthermore, hard X-ray CDI experiments are conducted. The spatial coherent length of the incident beam is also measured from the pinhole diffraction pattern. This platform can provide both conventional mode and scanning mode (ptychography) for the coherent diffraction imaging method, and the correct image reconstruction from the experimental diffraction patterns proves that the platform has the experimental capability for hard X-ray CDI. In the conventional forward scattering CDI mode, coherent diffraction patterns of pinhole are collected and used to analyse the coherence property of the optimized X-ray beam. The structure of pinhole is also reconstructed from the diffraction pattern. In the scanning CDI mode, a zone plate is used as a sample. The central area of zone plate is reconstructed correctly. About 90 nm/pixel resolution of reconstruction is achieved which is extremely dependent on the X-ray flux density from the undulator source emission. Hard X-ray CDI experimental platform based on the synchrotron radiation facility is first built in China. It will provide effective software and hardware supporting for the development and application of hard X-ray CDI experiments in China in the future.-
Keywords:
- synchrotron radiation /
- coherent diffraction imaging /
- coherence /
- phase retrieval
作者及机构信息
Authors and contacts
文章全文 : translate this paragraph
参考文献
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施引文献
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图 1 储存环流强为300 mA时, 不同波荡器K值下, 计算得到不同奇次谐波的(a)能量和(b)亮度分布
Fig. 1. Calculated (a) energy and (b) brilliance for odd harmonics as a function of the undulator K-value (a target ring current of 300 mA is used).
图 2 相干衍射实验模式@BL19U2光束线站布局图 (a)侧视图, 垂直方向; (b)上视图, 水平方向
Fig. 2. Beamline layout of the coherent scattering experimental modes on BL19U2: (a) Side view, vertical direction; (b) top view, horizontal direction.
图 3 (a)实验装置示意图; (b)现场照片
Fig. 3. (a) Schematic diagram of experimental equipment; (b) on-site picture.
图 4 (a), (b)不同入射光束相干度下的针孔衍射图样; (c)水平和(d)垂直方向上的衍射强度分布(图(a), (b)中白色虚线位置); 强度分布均为对数显示
Fig. 4. (a), (b) Measured diffraction patterns of pinhole with incident beam of reduced coherence; diffracted intensity distribution in the horizontal (c) and vertical (d) direction along the dotted line profile in panel (a) and (b), and the intensity distribution are shown in log scale.
图 5 针孔样品的(a)相干衍射图, (b) 结构重建图, (c)扫描电镜图
Fig. 5. Coherent diffraction pattern (a), reconstruction (b) and SEM image (c) of pinhole.
图 6 (a)探测器采集到的第441张衍射图; 根据衍射图重建波带片样品结构的(b)振幅和(c)相位信息; (d)波带片样品相应结构的电子显微镜图片; 根据衍射图重建的入射光束的(e)振幅和(f)相位信息
Fig. 6. (a) The 441st diffraction pattern collected by the detector; recovered (b) amplitude and (c) phase information of the sample structure of the Fresnel zone plate according to the diffraction patterns; (d) electron microscope image of the corresponding structures of the wave band specimens; reconstructed (e) amplitude and (f) phase information of the incident beam simultaneously according to the diffraction pattern.
表 1 国际上同步辐射相干散射(衍射)线站举例列表
Table 1. Well-known coherent scattering beamlines in the world.
光束线站 能量范围/keV 光斑尺寸/μm 相干通量 相干实验方法 NSLS 11-ID 6—16 3—10 5 × 1011 ph/s@9.65 keV CoSAXS, XPCS PETRA-III P10 5—20 4.5—40 3 × 109 ph/s CDI, Bragg CDI, XPCS SPring-8 29 XUL 4.5—18.7 ~1—20 ~109 ph/s CDI, Ptychography Diamond I13-1 6—35 1 × 1010 ph/s@8 keV CDI, Bragg CDI, Ptychography, XPCS APS 34-ID-C 5—15 ~0.7 5 × 109 ph/s@10 keV CoSAXS, Ptychography MAX IV CoSAXS 4—20 10 or 100 1.5 × 1012 ph/s@10 keV CoSAXS, XPCS SLS X12 SA 4.4—17.9 25 × 10 7 × 108 ph/s@6.2 keV CoSAXS PLS-II 9 C 5—15 < 300 1.7 × 1010 ph/s@10 keV CDI, Bragg CDI, XPCS TPS 25 A 5.5—20 1—10 1 × 1010 ph/s@6 keV CDI, XPCS 表 2 储存环流强为300 mA时, 波荡器不同参数下辐射出的能量、亮度、通量和相干通量
Table 2. Photon energy and highest brilliance/flux/coherent flux with corresponding undulator parameters (a target ring current of 300 mA is used).
光子能量/
keV谐波阶数 磁场/T K 亮度/
1018 flux·mm–2·mrad–2光通量/
1014 ph·s–1·0.1%BW–1相干光通量/
109 ph·s–1·0.1%BW–18 3 0.822 1.535 19.5 4.43 111 10 3 0.654 1.221 12.5 2.80 44.9 12 3 0.512 0.955 6.26 1.37 15.3 13.5 5 0.816 1.523 8.64 1.68 14.8 15 5 0.734 1.370 6.09 1.17 8.34 表 3 上海光源BL19U2光源点(12 keV时)及传播时的光束相干特性
Table 3. Beam parameters of BL19U2 (@12 keV) at the source and KB mirrors.
水平方向 垂直方向 光源点光斑尺寸 397 µm 26 µm 光源点发散度 78 µrad 23 µrad 光源点相干长度 0.48 µm 1.29 µm 光源点相干度 0.15% 7.59% KB镜处光斑尺寸 1073 µm 距离光源31.2 m 434 µm 距离光源点34 m KB镜处相干长度 3.36 µm 57.3 µm 深圳SEO优化公司漳州网络营销哪家好玉树网站设计价格沈阳百姓网标王拉萨网站优化软件内江网络营销哪家好潮州企业网站制作价格安康企业网站制作报价巴中模板推广哪家好开封关键词按天计费公司荆州百姓网标王推广公司广州建站哪家好西宁如何制作网站报价烟台SEO按天扣费济宁建设网站价格鞍山百度竞价包年推广多少钱承德网站推广系统报价威海网站设计景德镇企业网站设计哪家好大芬seo优化公司茂名网站优化按天收费价格温州建网站报价那曲网站优化按天收费推荐桐城SEO按天收费报价安康企业网站建设哪家好延安网站推广哪家好沈阳网站设计模板报价烟台阿里店铺托管价格长治百度网站优化排名价格巴中百度竞价东营网站优化推广价格歼20紧急升空逼退外机英媒称团队夜以继日筹划王妃复出草木蔓发 春山在望成都发生巨响 当地回应60岁老人炒菠菜未焯水致肾病恶化男子涉嫌走私被判11年却一天牢没坐劳斯莱斯右转逼停直行车网传落水者说“没让你救”系谣言广东通报13岁男孩性侵女童不予立案贵州小伙回应在美国卖三蹦子火了淀粉肠小王子日销售额涨超10倍有个姐真把千机伞做出来了近3万元金手镯仅含足金十克呼北高速交通事故已致14人死亡杨洋拄拐现身医院国产伟哥去年销售近13亿男子给前妻转账 现任妻子起诉要回新基金只募集到26元还是员工自购男孩疑遭霸凌 家长讨说法被踢出群充个话费竟沦为间接洗钱工具新的一天从800个哈欠开始单亲妈妈陷入热恋 14岁儿子报警#春分立蛋大挑战#中国投资客涌入日本东京买房两大学生合买彩票中奖一人不认账新加坡主帅:唯一目标击败中国队月嫂回应掌掴婴儿是在赶虫子19岁小伙救下5人后溺亡 多方发声清明节放假3天调休1天张家界的山上“长”满了韩国人?开封王婆为何火了主播靠辱骂母亲走红被批捕封号代拍被何赛飞拿着魔杖追着打阿根廷将发行1万与2万面值的纸币库克现身上海为江西彩礼“减负”的“试婚人”因自嘲式简历走红的教授更新简介殡仪馆花卉高于市场价3倍还重复用网友称在豆瓣酱里吃出老鼠头315晚会后胖东来又人满为患了网友建议重庆地铁不准乘客携带菜筐特朗普谈“凯特王妃P图照”罗斯否认插足凯特王妃婚姻青海通报栏杆断裂小学生跌落住进ICU恒大被罚41.75亿到底怎么缴湖南一县政协主席疑涉刑案被控制茶百道就改标签日期致歉王树国3次鞠躬告别西交大师生张立群任西安交通大学校长杨倩无缘巴黎奥运
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[5] Nugent K A 2010 Adv. Phys. 59 1 Google Scholar
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Fan J D, Jiang H D 2012 Acta Phys. Sin. 61 218702 Google Scholar
[7] 周光照, 佟亚军, 陈灿, 任玉琦, 王玉丹, 肖体乔 2011 物理学报 60 028701 Google Scholar
Zhou G Z, Tong Y J, Chen C, Ren Y Q, Wang Y D, Xiao T Q 2011 Acta Phys. Sin. 60 028701 Google Scholar
[8] 周光照, 王玉丹, 任玉琦, 陈灿, 叶琳琳, 肖体乔 2012 物理学报 61 018701 Google Scholar
Zhou G Z, Wang Y D, Ren Y Q, Chen C, Ye L L, Xiao T Q 2012 Acta Phys. Sin. 61 018701 Google Scholar
[9] Miao J W, Charalambous P, Kirz J, Sayre D 1999 Nature 400 342 Google Scholar
[10] Shi X W, Burdet N, Chen B, Xiong G, Streubel R, Harder R, Robinson I K 2019 Appl. Phys. Res. 6 011306
[11] Jiang H D, Song C Y, Chen C C, Xu R, Raines K S, Fahimian B P, Lu C H, Lee T K, Nakashima A, Urano J, Ishikawa T, Tamano F, Miao J W 2010 Proc. Natl. Acad. Sci. USA 107 11234 Google Scholar
[12] Rodriguez J A, Xu R, Chen C C, Huang Z F, Jiang H D, Chen A L, Raines K S, Jr A P, Nam D, Wiegart L, Song C Y, Madsen A, Chushkin Y, Zontone F, Bradley P J, Miao J W 2015 IUCrJ 2 575 Google Scholar
[13] Yang W G, Huang X J, Harder R, Clark J N, Robinson I K, Mao H K 2013 Nat. Commun. 4 1680 Google Scholar
[14] Holler M, Sicairos M G, Tsai E H R, Dinapoli R, M, Müller E, Bunk O, Raabe J, Aeppli G 2017 Nature 543 402 Google Scholar
[15] Miao J W, Ishikawa T, Robinson I K, Murnane M M 2015 Science 348 530 Google Scholar
[16] Zhang X Y 2018 Synchrotron Radiation Applications (Singapore: World Scientific Hackensack) pp343−388
[17] Grübel G, Madsen A, Robert A (Borsali R, Pecora R eds) 2008 Soft Matter Characterization (Heidelberg: Springer Netherlands) pp953−995
[18] Sinha S K, Jiang Z, Lurio L B 2014 Adv. Mater. 26 7764 Google Scholar
[19] 张明俊, 郭智, 邰仁忠, 张祥志, 罗豪甦 2015 物理学报 64 147801 Google Scholar
Zhang M J, Guo Z, Tai R Z, Zhang X Z, Luo H S 2015 Acta Phys. Sin. 64 147801 Google Scholar
[20] Xu R, Salha S, Raines K S, Jiang H D, Chen C C, Takahashi Y, Kohmura Y, Nishino Y, Song C Y, Ishikawa T, Miao J W 2011 J. Synchrotron Radiat. 18 293 Google Scholar
[21] Rau C, Wagner U, Pesic Z, Fanis A D 2011 Phys. Status Solidi A 208 2522 Google Scholar
[22] Xu Z J, Wang C P, Liu H G, Tao X L, Tai R Z 2017 J. Phy. Conf. Ser. 849 012033 Google Scholar
[23] Li N, Li X, Wang Y, Liu G, Zhou P, Wu H, Hong C, Bian F, Zhang R 2016 J. Appl. Crystallogr. 49 1428 Google Scholar
[24] 玻恩M, 沃耳夫E 著 (杨葭荪 译)2009 光学原理: 光的传播、干涉和衍射的电磁理论(第7版) (北京: 电子工业出版社) 第459−525页
Born M, Wolf E (translated by Yang J S) 2009 Principles of Optics: Electromagnetic Theory of Propagation, Interference and Diffraction of Light (7th Ed.) (Beijing: Publishing House of Electronics Industry) pp459−525 (in Chinese)
[25] 徐朝银 著 2013 同步辐射光学与工程 (合肥: 中国科学技术大学出版社) 第24−37页
Xu C Y 2013 Synchrotron Radiation Optics and Engineering (Hefei: Press of University of Science and Technology of China) pp24−37 (in Chinese)
[26] 王华, 闫帅, 闫芬, 蒋升, 毛成文, 梁东旭, 杨科, 李爱国, 余笑寒 2012 物理学报 61 144102 Google Scholar
Wang H, Yan S, Yan F, Jiang S, Mao C W, Liang D X, Yang K, Li A G, Yu X H 2012 Acta Phys. Sin. 61 144102 Google Scholar
[27] Tanaka T, Kitamura H 2001 J. Synchrotron Radiat. 8 1221 Google Scholar
[28] Hua W Q, Bian F G, Song L, Li X H, Wang J 2013 Chin. Phys. C 37 068001 Google Scholar
[29] Yu C J, Lee H C, Chan K, Cha W, Carnis J, Kim Y, Noh D Y, Kim H 2014 J. Synchrotron Radiat. 21 264 Google Scholar
[30] Hua W Q, Zhou G Z, Wang Y Z, Zhou P, Yang S M, Peng C Q, Bian F G, Li X H, Wang J 2017 Chin. Opt. Lett. 15 033401 Google Scholar
[31] Deng J J, Vine D J, Chen S, Jin Q L, Nashed Y S G, Peterka T, Vogt S, Jacobsen C 2017 Sci. Rep. 7 445 Google Scholar
[32] Maiden A M, Rodenburg J M 2009 Ultramicroscopy 109 1256 Google Scholar
目录
- 第69卷,第3期 - 2020年02月05日
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