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Millisecond dynamics of colloidal suspension studied by X-ray photon correlation spectroscopy at the Shanghai Synchrotron Radiation Facility 被引量:1
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作者 Chen-Hui Cui Zi-Mu Zhou +7 位作者 Lin-Feng Wei Song-Lin Li Feng Tian Xiu-Hong Li Zhi Guo Yi-Hui Xu Huai-Dong Jiang ren-zhong tai 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2024年第1期1-9,共9页
X-ray photon correlation spectroscopy(XPCS)has emerged as a powerful tool for probing the nanoscale dynamics of soft condensed matter and strongly correlated materials owing to its high spatial resolution and penetrat... X-ray photon correlation spectroscopy(XPCS)has emerged as a powerful tool for probing the nanoscale dynamics of soft condensed matter and strongly correlated materials owing to its high spatial resolution and penetration capabilities.This technique requires high brilliance and beam coherence,which are not directly available at modern synchrotron beamlines in China.To facilitate future XPCS experiments,we modified the optical setup of the newly commissioned BL10U1 USAXS beamline at the Shanghai Synchrotron Radiation Facility(SSRF).Subsequently,we performed XPCS measurements on silica suspensions in glycerol,which were opaque owing to their high concentrations.Images were collected using a high frame rate area detector.A comprehensive analysis was performed,yielding correlation functions and several key dynamic parameters.All the results were consistent with the theory of Brownian motion and demonstrated the feasibility of XPCS at SSRF.Finally,by carefully optimizing the setup and analyzing the algorithms,we achieved a time resolution of 2 ms,which enabled the characterization of millisecond dynamics in opaque systems. 展开更多
关键词 XPCS SSRF Silica suspension GLYCEROL Brownian motion Millisecond dynamics
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High-precision X-ray polarimeter based on channel-cut crystals
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作者 Shang-Yu Si Zhong-Liang Li +8 位作者 Wen-Hong Jia Lian Xue Hong-Xin Luo Jian-Cai Xu Bai-Fei Shen Lin-Gang Zhang Liang-Liang Ji Yu-Xin Leng ren-zhong tai 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2024年第3期30-39,共10页
We report on using synthetic silicon for a high-precision X-ray polarimeter comprising a polarizer and an analyzer,each based on a monolithic channel-cut crystal used at multiple Brewster reflections with a Bragg angl... We report on using synthetic silicon for a high-precision X-ray polarimeter comprising a polarizer and an analyzer,each based on a monolithic channel-cut crystal used at multiple Brewster reflections with a Bragg angle very close to 45°.Experiments were performed at the BL09B bending magnet beamline of the Shanghai Synchrotron Radiation Facility using a Si(800)crystal at an X-ray energy of 12.914 keV.A polarization purity of 8.4×10^(-9)was measured.This result is encouraging,as the measured polarization purity is the best-reported value for the bending magnet source.Notably,this is the firstly systematic study on the hard X-ray polarimeter in China,which is crucial for exploring new physics,such as verifying vacuum birefringence. 展开更多
关键词 X-ray polarimeter Vacuum birefringence Synchrotron radiation Channel-cut crystal
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Design of wide-range energy material beamline at the Shanghai Synchrotron Radiation Facility 被引量:4
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作者 Zhen-Hua Chen Fan-Fei Sun +5 位作者 Ying Zou Fei Song Shuo Zhang Zheng Jiang Yong Wang ren-zhong tai 《Nuclear Science and Techniques》 SCIE CAS CSCD 2018年第2期91-102,共12页
We report the design of a wide-range energy material beamline(E-line) with multiple experimental techniques at the Shanghai Synchrotron Radiation Facility.The undulators consisted of an elliptically polarizing undulat... We report the design of a wide-range energy material beamline(E-line) with multiple experimental techniques at the Shanghai Synchrotron Radiation Facility.The undulators consisted of an elliptically polarizing undulator and in-vacuum undulator that generate the soft and hard X-rays, respectively. The beamline covered a wide energy range from 130 to 18 ke V with both a high photon flux([ 10^(12) phs/s with exit silt 30 lm in soft X-ray and [ 5 9 10^(12) phs/s in hard X-ray within 0.1%BW bandwidth) and promising resolving power(maximum E/DE [ 15,000 in soft X-ray with exit silt 30 lm and [6000 in hard X-ray). Moreover, the beam spots from the soft and hard X-rays were focused to the same sample position with a high overlap ratio, so that the surfaces, interfaces, and bulk properties were characterized in situ by changing the probing depth. 展开更多
关键词 SYNCHROTRON RADIATION BEAMLINE Wide energy range E-line SHANGHAI SYNCHROTRON RADIATION FACILITY
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An APXPS endstation for gas–solid and liquid–solid interface studies at SSRF 被引量:4
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作者 Jun Cai Qiao Dong +7 位作者 Yong Han Bao-Hua Mao Hui Zhang Patrik G.Karlsson John ?hlund ren-zhong tai Yi Yu Zhi Liu 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第5期103-112,共10页
In the past few decades, various surface analysis techniques find wide applications in studies of interfacial phenomena ranging from fundamental surface science,catalysis, environmental science and energy materials.Wi... In the past few decades, various surface analysis techniques find wide applications in studies of interfacial phenomena ranging from fundamental surface science,catalysis, environmental science and energy materials.With the help of bright synchrotron sources, many of these techniques have been further advanced into novel in-situ/operando tools at synchrotron user facilities, providing molecular level understanding of chemical/electrochemical processes in-situ at gas–solid and liquid–solid interfaces.Designing a proper endstation for a dedicated beamline is one of the challenges in utilizing these techniques efficiently for a variety of user's requests. Many factors,including pressure differential, geometry and energy of the photon source, sample and analyzer, need to be optimized for the system of interest. In this paper, we discuss the design and performance of a new endstation at beamline02 B at the Shanghai Synchrotron Radiation Facility for ambient pressure X-ray photoelectron spectroscopy studies.This system, equipped with the newly developed hightransmission HiPP-3 analyzer, is demonstrated to be capable of efficiently collecting photoelectrons up to 1500 eV from ultrahigh vacuum to ambient pressure of 20 mbar.The spectromicroscopy mode of HiPP-3 analyzer also enables detection of photoelectron spatial distribution with resolution of 2.8 ± 0.3 lm in one dimension. In addition,the designing strategies of systems that allow investigations in phenomena at gas–solid interface and liquid–solid interface will be highlighted through our discussion. 展开更多
关键词 AMBIENT pressure XPS SYNCHROTRON Liquid- SOLID interface SPECTROMICROSCOPY
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Soft X-ray ptychography method at SSRF 被引量:2
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作者 Chun-Peng Wang Zi-Jian Xu +2 位作者 Hai-Gang Liu Xulei Tao ren-zhong tai 《Nuclear Science and Techniques》 SCIE CAS CSCD 2017年第6期86-94,共9页
Ptychography is a diffraction-based X-ray microscopy technique in which an extended sample is scanned by a coherent beam with overlapped illuminated areas and complex transmission function of the sample is obtained by... Ptychography is a diffraction-based X-ray microscopy technique in which an extended sample is scanned by a coherent beam with overlapped illuminated areas and complex transmission function of the sample is obtained by applying iterative phase retrieval algorithms to the diffraction patterns recorded at each scanned position.It permits quantitatively imaging of non-crystalline specimens at a resolution limited only by the X-ray wavelength and the maximal scattering angle detected.In this paper,the development of soft X-ray ptychography method at the BL08U1 A beamline of Shanghai Synchrotron Radiation Facility is presented.The experimental setup,experimental parameters selection criteria,and post-experimental data analyzing procedures are presented in detail with a prospect of high-resolution image reconstruction in real time.The performance of this newly implemented method is demonstrated through the measurements of a resolution test pattern and two real samples:Pt-Co alloy nanoparticles and a breast cancer cell.The results indicate that strong scattering specimens can be reconstructed to sub-20 nm resolution,while a sub-25 nm resolution for biological specimens can be achieved. 展开更多
关键词 PTYCHOGRAPHY COHERENT DIFFRACTION imaging X-ray MICROSCOPY Phase RETRIEVAL
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Picosecond time-resolved X-ray ferromagnetic resonance measurements at Shanghai synchrotron radiation facility 被引量:2
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作者 Xia Yang Jie-Feng Cao +6 位作者 Jun-Qin Li Fang-Yuan Zhu Rui Yu Jian He Zi-Long Zhao Yong Wang ren-zhong tai 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2022年第5期126-134,共9页
An experimental picosecond time-resolved X-ray ferromagnetic resonance(TR-XFMR)apparatus with a time resolution of 13 ps(RMS)or 31 ps(FWHM)was constructed and demonstrated in the 07U and 08U1A soft X-ray beamlines at ... An experimental picosecond time-resolved X-ray ferromagnetic resonance(TR-XFMR)apparatus with a time resolution of 13 ps(RMS)or 31 ps(FWHM)was constructed and demonstrated in the 07U and 08U1A soft X-ray beamlines at the Shanghai Synchrotron Radiation Facility(SSRF)using pump-probe detection and X-ray magnetic circular dichroism(XMCD)spectroscopy.Element and time-resolved ferromagnetic resonance was excited by continuous microwave phase-locking of the bunch clock within the photon beam during synchrotron radiation and was characterized by detecting the magnetic circular dichroism signals of the elements of interest in the magnetic films.Using this equipment,we measured the amplitude of the element-specific moment precession during ferromagnetic resonance(FMR)at 2 GHz in a single Ni81Fe19layer. 展开更多
关键词 Ferromagnetic resonance Time resolution PUMP-PROBE Synchrotron radiation
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Coexistence of Polaronic States and Superconductivity in Iron-Pnictide Compound Ba_2Ti_2Fe_2As_4O
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作者 Li-Yuan Rong Xun Shi +9 位作者 Pierre Richard Yun-Lei Sun Guang-Han Cao Xiang-Zhi Zhang Jun-Zhang Ma Ming Shi Yao-Bo Huang Tian Qian Hong Ding ren-zhong tai 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第5期119-122,共4页
The electronic structure of iron-pnictide compound superconductor Ba_2Ti_2Fe_2As_4O, which has metallic intermediate Ti_2O layers, is studied using angle-resolved photoemission spectroscopy. The Ti-related bands show ... The electronic structure of iron-pnictide compound superconductor Ba_2Ti_2Fe_2As_4O, which has metallic intermediate Ti_2O layers, is studied using angle-resolved photoemission spectroscopy. The Ti-related bands show a‘peak-dip-hump' line shape with two branches of dispersion associated with the polaronic states at temperatures below around 120 K. This change in the spectra occurs along with the resistivity anomaly that was not clearly understood in a previous study. Moreover, an energy gap induced by the superconducting proximity effect opens in the polaronic bands at temperatures below T_c(~21 K). Our study provides the spectroscopic evidence that superconductivity coexists with polarons in the same bands near the Fermi level, which provides a suitable platform to study interactions between charge, lattice and spin freedoms in a correlated system. 展开更多
关键词 Ti As Coexistence of Polaronic States and Superconductivity in Iron-Pnictide Compound Ba2Ti2Fe2As4O Fe BA
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Smelting recrystallization of CsPbBrI_(2)perovskites for indoor and outdoor photovoltaics 被引量:2
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作者 Kai-Li Wang Ying-Guo Yang +9 位作者 Yan-Hui Lou Meng Li Femi Igbari Jun-Jie Cao Jing Chen Wen-Fan Yang Chong Dong Lina Li ren-zhong tai Zhao-Kui Wang 《eScience》 2021年第1期53-59,共7页
A smelting multiple recrystallization strategy and its effects on the morphology,composition,and defects of CsPbBrI_(2)film were investigated.An optimal number(n=2)of recrystallization cycles improved the crystallinit... A smelting multiple recrystallization strategy and its effects on the morphology,composition,and defects of CsPbBrI_(2)film were investigated.An optimal number(n=2)of recrystallization cycles improved the crystallinity and phase purity,minimized the grain boundaries,and optimized the crystal structure,yielding a high-quality perovskite film with significantly reduced defects density.The corresponding photovoltaic devices exhibited a champion efficiency of 16.02%under AM 1.5 G illumination and presented an even higher indoor efficiency of 33.50%under an LED(2956 K,P_(in):334.41𝜇W/cm^(2)).This recrystallization method offers a promising strategy for developing high-performance indoor and outdoor photovoltaics.Direct recrystallization in the cells was also explored to achieve enhanced stability and longer lifetime in humid conditions. 展开更多
关键词 Perovskite solar cells RECRYSTALLIZATION Trap density INDOOR INORGANIC
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