A5089622562- Advanced X-ray Imaging Techniques
- Advanced Electron Microscopy Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Adaptive optics and wavefront sensing
- Power Systems and Renewable Energy
- Optical Systems and Laser Technology
- Laser-Plasma Interactions and Diagnostics
- Advanced Surface Polishing Techniques
- Advanced X-ray and CT Imaging
- Microgrid Control and Optimization
- Smart Grid Energy Management
- Optical measurement and interference techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Measurement and Metrology Techniques
- Smart Grid and Power Systems
- Advancements in Photolithography Techniques
- Astronomical Observations and Instrumentation
- Integrated Energy Systems Optimization
- Solar and Space Plasma Dynamics
- Astrophysical Phenomena and Observations
- Semiconductor materials and interfaces
- Heavy Metal Exposure and Toxicity
- HIV-related health complications and treatments
- Spatial and Panel Data Analysis
- Crystallography and Radiation Phenomena
Osaka University
2018-2024
Nagoya University
2010-2024
SPring-8
2024
Nagoya Institute of Technology
2019-2020
A method of fabricating multilayer focusing mirrors that can focus X-rays down to 10 nm or less was established in this study. The wavefront aberration induced by Kirkpatrick-Baez mirror optics measured using a single grating interferometer at photon energy 9.1 keV SPring-8 Angstrom Compact Free Electron Laser (SACLA), and the shape then directly corrected employing differential deposition method. accuracies these processes were carefully investigated, considering accuracy required for...
X-ray diffraction of silicon irradiated with tightly focused femtosecond x-ray pulses (photon energy, 11.5 keV; pulse duration, 6 fs) was measured at various intensities up to 4.6×10^{19} W/cm^{2}. The measurement reveals that the intensity is highly suppressed when reaches order 10^{19} With a dedicated simulation, we confirm observed reduction can be attributed change in individual atomic scattering factors due ultrafast creation ionized atoms through photoionization, Auger decay, and...
Abstract Metal homeostasis is tightly regulated in cells and organisms, its disturbance frequently observed some diseases such as neurodegenerative metabolic disorders. Previous studies suggest that zinc iron are necessary for the normal functions of pancreatic β cells. However, distribution elements conditions pathophysiological significance dysregulated islet diabetic have remained unclear. In this study, to investigate dynamics islets a mouse model expressing human amyloid polypeptide...
It is widely recognized that the toxicity of mercury (Hg) attenuated by simultaneous administration selenium (Se) compounds in various organisms. In this study, we revealed mechanisms underlying antagonistic effect sodium selenite (Na2SeO3) on inorganic Hg (Hg2+) human hepatoma HepG2 cells. Observations transmission electron microscopy indicated HgSe (tiemannite) granules up to 100 nm diameter were accumulated lysosomal-like structures The composed a number nanoparticles, each measuring less...
Power output fluctuation of photovoltaic power generation systems (PVSs) high penetration may cause negative impact on the load frequency control (LFC) existing electric utility. For cost-effective mitigation, proper evaluation PVSs dispersed in large-area is very important. Based independence insolation among various points, this paper discusses practical usability standard deviation (STD) total simply calculated as 1/√N value STD at representative point. The statistical using observed 5...
This study proposes a method to estimate the standard deviation (STD) of total power output fluctuation high penetration photovoltaic generation system (HP-PVS) dispersed in large area, so that impact HP-PVS on load frequency control is discussed. First, by using data horizontal global insolation observed at 5 points 25 km × practical usefulness STD evaluated comparing with maximum width. Then, two key factors proposed model are discussed; distance which fluctuations can be considered as...
Power output fluctuation of high penetration photovoltaic power generation systems (PVSs) may cause negative impacts on the load frequency control (LFC) an electric utility. For cost-effective mitigation, proper evaluation apparent electricity demand is important, taking PVSs into account as a demand. If actual patterns are independent among several points, standard deviation (STD) total located in points can be estimated based addition theorem variance. Moreover, central limit applied if...
X-ray single-grating interferometry was applied to conduct accurate wavefront corrections for hard nanofocusing mirrors. Systematic errors in the interferometer, originating from a grating, detector, and alignment of components, were carefully examined. Based on measured errors, mirror shapes directly corrected using differential deposition technique. The focusing mirrors with numerical aperture 0.01 attained two-dimensionally diffraction-limited performance. results correction indicate that...
X-ray microscopy is very promising not only for nondestructive and high-spatial-resolution observation of the internal structure a sample but also elemental distribution chemical state analysis. However, spatial resolution microscopes remains unsatisfactory owing to fabrication error in objective lens. To realize an ultra-high-resolution, we propose develop monolithic deformable mirror based on lithium niobite single crystal novel adaptive imaging system it. An interferometer confirmed that...
In this study, the systematic errors of an X-ray single-grating interferometer based on Talbot effect were investigated in detail. Non-negligible induced by camera identified and a method to eliminate error was proposed. Systematic-error-free measurements wavefront produced multilayer focusing mirrors with large numerical apertures demonstrated at SPring-8 Angstrom Compact free electron LAser. Consequently, aberration obtained two different cameras found be consistent accuracy better than λ/12.
Ultimate focusing of an X-ray free-electron laser (XFEL) enables the generation ultrahigh-intensity pulses. Although sub-10 nm has already been achieved using synchrotron light sources, XFEL beams remains difficult mainly because insufficient stability source hinders evaluation a focused beam profile. This problem is specifically disadvantageous for Kirkpatrick–Baez (KB) mirror system, in which slight misalignment ∼300 nrad can degrade beam. In this work, nanobeam was generated reflective KB...
Power output fluctuation of photovoltaic power generation systems (PVSs) may cause negative impact on the load frequency control existing electric system when penetration PVSs is quite large. For cost-effective mitigation, proper evaluation apparent electricity property very important, taking into account as load. Considering independency patterns insolation among various locations, this study evaluates standard deviation total by using multi-point observation data insolation. The diversity...
Based on the independence of insolation fluctuations among various points, this paper estimates standard deviation total power output fluctuation photovoltaic generation systems (PVSs) high penetration. In order to apply simplified calculation property based independence, study develops an area model consisting a number blocks, where PVS pattern cycles shorter than few ten minutes is considered as independent blocks by considering independency evaluation insolation. This evaluates apparent...
This paper proposes and demonstrates a simple method using the intensity correlation of X-ray fluorescence to evaluate focused beam size an free-electron laser (XFEL). was applied sub-micrometre XFEL at SPring-8 Angstrom Compact Free Electron Laser, evaluated proposed consistent with that measured knife-edge scan method. The is readily applicable extremely small spots can be for precise diagnostics sub-10 nm beams which have recently emerged.
We demonstrate a propagation-based phase-contrast imaging method for full-field X-ray microscopy based on advanced Kirkpatrick-Baez (AKB) mirrors to achieve high-contrast observations of weak phase objects and correct field curvature aberrations. Through demonstration performed at SPring-8, the contrast such as polystyrene spheres chemically fixed cells was successfully observed with high sensitivity (∼0.03 rad). Furthermore, view AKB expanded full area obtained images (25 × 30 µm) by...
Abstract By illuminating matter with bright and intense light, we gain profound insights into its composition property. In the regime of extremely short wavelengths, X-ray free-electron lasers (XFELs) exceptional peak brilliance have unveiled crucial details about structures, dynamics, physics various materials. Although focusing optics to enhance intensity progressed, achieving a single-nanometre spot that fully exploits source performance has remained elusive. Aberrations arising from...
We propose an extended X-ray adaptive zoom condenser that can form intermediate virtual focus. The system comprises two deformable mirrors for focusing within a single dimension and vary its numerical aperture (NA) without changing the positions of light source, mirrors, or final desired NA is achieved simply by controlling mirror surfaces, which enables conversion between convex concave forms, varying position A feasibility test at SPring-8 under photon energy 10 keV demonstrated beam size...
In this study, we evaluated the practical usability of so-called 1/√N rule, focusing on three factors, i.e. geographical extent, location representative point, and topological difference. First, by using insolation data observed at 37 points mainly located in Nobi Plain, calculated correlation diagram between two different standard deviations (STDs) average fluctuation, STD ensemble N (σe) with point rule (σN). As results evaluating slope R2 values regression line P-value χ2-test regarding...
We propose a multi-frame blind deconvolution method using an in-plane rotating sample optimized for X-ray microscopy, where the application of existing methods is technically difficult. Untrained neural networks are employed as reconstruction algorithm to enable robust against stage motion errors caused by rotation samples. From demonstration experiments full-field microscopy with advanced Kirkpatrick–Baez mirror optics at SPring-8, spatial resolution 34 nm (half period) was successfully...
HIV-associated lipodystrophy has been reported in people taking anti-retroviral therapy (ART). Lipodystrophy can cause cardiovascular diseases, affecting the quality of life HIV-infected individuals. In this study, we propose a pharmacological lipid index to estimate risk hyperlipidemia caused by drugs. Lipid droplets were stained cells treated with drugs and cyclosporin A. Signal intensities plotted against drug concentrations obtain an isodose 10 μM A, which call Pharmacological Index...
Scatterometry has been put into practical use for microstructure measurement of ultra-large-scale integration due to its high process compatibility. On the other hand, application limited periodic structures. By applying this method isolated systems and using hard X-rays, it may be possible significantly exceed a resolution 10 nm, which is limit conventional optical measurement. We demonstrate feasibility by rigorous calculations. For purpose, we measured intensity specular reflection noise...
We present a new planar Ni compound refractive lens for high energy X-rays (116 keV). The is composed of identical plano-concave elements with longitudinal parabolic grooves manufactured by punch technique. In order to increase the transmission, thickness single at groove vertex was reduced less than 5 μm and radius curvature about 20 μm. small allowed us reduce number needed get focal length 3 m 54 lenses. gain parameter has been significantly improved compared previous lenses due higher...
X-ray scientists are continually striving to improve the quality of microscopy, due fact that information obtained from microscopy materials can be complementary optical and electron microscopes. In contrast ease with which one deflect beams, relative difficulty has constrained development scanning microscopes (SXMs) based on a scan an small probe. This restriction caused severe complications hinder progress toward achieving ultimate resolution. Here, simple innovative method for...