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458 results on '"Inubushi, Y."'

1. Strength of diamond beyond the elastic limit under dynamic compression

Author

Katagiri, K., Ozaki, N., Dresselhaus-Marais, L. E., Eggert, J. H., Inubushi, Y., Irifune, T., Koenig, M., Matsuoka, T., Miyanishi, K., Nakamura, H., Nishiyama, N., Okuchi, T., Sekine, T., Seto, Y., Sueda, K., Tange, Y., Togashi, T., Umeda, Y., Yabashi, M., Yabuuchi, T., and Kodama, R.

Subjects
Condensed Matter - Materials Science
Abstract

Extremely high pressures over a million of atmospheres are required to deform diamonds permanently. Under dynamic high-pressure conditions, even such strong materials lose their strengths so rapidly that the initially pristine lattice transforms into complex dynamics. Here, we report femtosecond x-ray diffraction observations that directly resolve how shock waves deform the crystal lattice in the isotropic nano-polycrystalline form of diamond. The results show that the nano-grain reinforced diamond retains its strength at shock pressures far beyond its elastic limit until it finally approaches zero at 707 GPa, indicating the existence of brittle-ductile transition of nano-polycrystalline diamond under high-strain rate shock compression. The atomic-level deformation process of the diamond observed in this study is a key benchmark for designing high strength materials and simulating their behavior under extreme conditions.

Published
2022

2. Direct imaging of shock wave splitting in diamond at Mbar pressures

Author

Makarov, S. S., Dyachkov, S. A., Pikuz, T. A., Katagiri, K., Zhakhovsky, V. V., Inogamov, N. A., Khokhlov, V. A., Martynenko, A. S., Albertazzi, B., Rigon, G., Mabey, P., Hartley, N., Inubushi, Y., Miyanishi, K., Sueda, K., Togashi, T., Yabashi, M., Yabuuchi, T., Kodama, R., Pikuz, S. A., Koenig, M., and Ozaki, N.

Subjects
Physics - Plasma Physics, Condensed Matter - Materials Science
Abstract

The propagation of a shock wave in solids can stress them to ultra-high pressures of millions of atmospheres. Understanding the behavior of matter at these extreme pressures is essential to describe a wide range of physical phenomena, including the formation of planets, young stars and cores of super-Earths, as well as the behavior of advanced ceramic materials subjected to such stresses. Under megabar (Mbar) pressure, even a solid with high strength exhibits plastic properties, causing the shock wave to split in two. This phenomenon is described by theoretical models, but without direct experimental measurements to confirm them, their validity is still in doubt. Here, we present the results of an experiment in which the evolution of the coupled elastic-plastic wave structure in diamond was directly observed and studied with submicron spatial resolution, using the unique capabilities of the X-ray free-electron laser. The direct measurements allowed, for the first time, the fitting and validation of a strength model for diamond in the range of several Mbar by performing continuum mechanics simulations in 2D geometry. The presented experimental approach to the study of shock waves in solids opens up new possibilities for the direct verification and construction of the equations of state of matter in the ultra-high pressure range, which are relevant for the solution of a variety of problems in high energy density physics., Comment: 14 pages, 15 figures, submitted to Nature

Published
2022

3. Using Diffuse Scattering to Observe X-Ray-Driven Nonthermal Melting

Author

Hartley, N. J., Grenzer, J., Huang, L., Inubushi, Y., Kamimura, N., Katagiri, K., Kodama, R., Kon, A., Lu, W., Makita, M., Matsuoka, T., Nakajima, S., Ozaki, N., Pikuz, T., Rode, A., Sagae, D., Schuster, A. K., Tono, K., Voigt, K., Vorberger, J., Yabuuchi, T., McBride, E. E., and Kraus, D.

Subjects
Physics - Plasma Physics
Abstract

We present results from the SPring-8 Angstrom Compact free electron LAser (SACLA) XFEL facility, using a high intensity ($\sim\!10^{20}\,$W/cm$^2$) X-ray pump X-ray probe scheme to observe changes in the ionic structure of silicon induced by X-ray heating of the electrons. By avoiding Laue spots in the scattering signal from a single crystalline sample, we observe a rapid rise in diffuse scattering, which we attribute to a loss of lattice order and a transition to a liquid state within 100 fs of irradiation, a timescale which agrees well with first principles simulations, but is faster than that predicted by purely inertial behavior. This method is capable of observing liquid scattering without masking or filtering of signal from the ambient solid, allowing the liquid structure to be measured throughout and beyond the phase change., Comment: 6 pages, 5 figures. Updated title and abstract

Published
2020
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4. Search for Two-Photon Interaction with Axionlike Particles Using High-Repetition Pulsed Magnets and Synchrotron X Rays

Author

Inada, T., Yamazaki, T., Namba, T., Asai, S., Kobayashi, T., Tamasaku, K., Tanaka, Y., Inubushi, Y., Sawada, K., Yabashi, M., Ishikawa, T., Matsuo, A., Kawaguchi, K., Kindo, K., and Nojiri, H.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors, Physics - Optics
Abstract

We report on new results of a search for two-photon interaction with axionlike particles (ALPs). The experiment was carried out at a synchrotron radiation facility using a "light shining through a wall (LSW)" technique. For this purpose, we have developed a novel pulsed-magnet system, composed of multiple racetrack-magnets and a transportable power supply. It produces fields of about 10 T over 0.8 m with a high repetition rate of 0.2 Hz and yields a new method of probing vacuum with high intensity fields. The data obtained with a total of 27,676 pulses provide a limit on the ALP-two-photon coupling constant that is more stringent by a factor of 5.2 compared to a previous x-ray LSW limit for the ALP mass below 0.1 eV., Comment: 5 pages, 4 figures, 1 table

Published
2016
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5. An experiment of X-ray photon-photon elastic scattering with a Laue-case beam collider

Author

Yamaji, T., Inada, T., Yamazaki, T., Namba, T., Asai, S., Kobayashi, T., Tamasaku, K., Tanaka, Y., Inubushi, Y., Sawada, K., Yabashi, M., and Ishikawa, T.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

We report a search for photon-photon elastic scattering in vacuum in the X-ray region at an energy in the center of mass system of \omega_{cms} =6.5 keV for which the QED cross section is \sigma_{QED} =2.5 \times 10^{-47} m^2. An X-ray beam provided by the SACLA X-ray Free Electron Laser is split and the two beamlets are made to collide at right angle, with a total integrated luminosity of (1.24 \pm 0.08) \times 10^{28} m^{-2}. No signal X rays from the elastic scattering that satisfy the correlation between energy and scattering angle were detected. We obtain a 95% C.L. upper limit for the scattering cross section of 1.9 \times 10^{-27} m^2 at \omega_{cms}=6.5 keV. The upper limit is the lowest upper limit obtained so far by keV experiments., Comment: 11 pages, 2 Postscript figures, 1 tables

Published
2016
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6. Coherent Acoustic Perturbation of Second-Harmonic-Generation in NiO

Author

Huber, L., Ferrer, A., Kubacka, T., Huber, T., Dornes, C., Sato, T., Ogawa, K., Tono, K., Katayama, T., Inubushi, Y., Yabashi, M., Tanaka, Yoshikazu, Beaud, P., Fiebig, M., Scagnoli, V., Staub, U., and Johnson, S. L.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

We investigate the structural and magnetic origins of the unusual ultrafast second-harmonicgeneration (SHG) response of femtosecond-laser-excited nickel oxide (NiO) previously attributed to oscillatory reorientation dynamics of the magnetic structure induced by d-d excitations. Using time-resolved x-ray diffraction from the (3/2 3/2 3/2) magnetic planes, we show that changes in the magnitude of the magnetic structure factor following ultrafast optical excitation are limited to $\Delta/$ = 1.5% in the first 30 ps. An extended investigation of the ultrafast SHG response reveals a strong dependence on wavelength as well as characteristic echoes, both of which give evidence for an acoustic origin of the dynamics. We therefore propose an alternative mechanism for the SHG response based on perturbations of the nonlinear susceptibility via optically induced strain in a spatially confined medium. In this model, the two observed oscillation periods can be understood as the times required for an acoustic strain wave to traverse one coherence length of the SHG process in either the collinear or anti-collinear geometries., Comment: 26 pages, 7 figures

Published
2015
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8. Search for Photon-Photon Elastic Scattering in the X-ray Region

Author

Inada, T., Yamaji, T., Adachi, S., Namba, T., Asai, S., Kobayashi, T., Tamasaku, K., Tanaka, Y., Inubushi, Y., Sawada, K., Yabashi, M., and Ishikawa, T.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors, Physics - Optics
Abstract

We report the first results of a search for real photon-photon scattering using X rays. A novel system is developed to split and collide X-ray pulses by applying interferometric techniques. A total of $6.5\times10^{5}$ pulses (each containing about $10^{11}$ photons) from an X-ray Free-Electron Laser are injected into the system. No scattered events are observed, and an upper limit of $1.7\times 10^{-24}$ ${\rm m^{2}}$ (95% C.L.) is obtained on the photon-photon elastic scattering cross section at 6.5 keV.

Published
2014
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9. In Situ Characterization of XFEL Beam Intensity Distribution and Focusability by High-Resolution LiF Crystal Detector

Author

Pikuz, T. A., Faenov, A. Ya., Matsuoka, T., Albertazzi, B., Ozaki, N., Hartely, N., Muray Ricardo Arturo, O., Yabuuchi, T., Habara, H., Matsuyama, S., Yamauchi, K., Inubushi, Y., Togashi, T., Yumoto, H., Tange, Y., Tono, K., Sato, Y., Yabashi, M., Nishikino, M., Kawachi, T., Mitrofanov, A., Pikuz, S. A., Bleiner, D., Grum-Grzhimailo, A., Rosanov, N. N., Vysotina, N. V., Harmand, M., Koenig, M., Tanaka, K. A., Ishikawa, T., Kodama, R., Kawachi, Tetsuya, editor, Bulanov, Sergei V., editor, Daido, Hiroyuki, editor, and Kato, Yoshiaki, editor

Published
2018
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10. Micron-scale phenomena observed in a turbulent laser-produced plasma

Author

Rigon, G., Albertazzi, B., Pikuz, T., Mabey, P., Bouffetier, V., Ozaki, N., Vinci, T., Barbato, F., Falize, E., Inubushi, Y., Kamimura, N., Katagiri, K., Makarov, S., Manuel, M. J.-E., Miyanishi, K., Pikuz, S., Poujade, O., Sueda, K., Togashi, T., Umeda, Y., Yabashi, M., Yabuuchi, T., Gregori, G., Kodama, R., Casner, A., and Koenig, M.

Published
2021
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12. Deep inner-shell multiphoton ionization by intense x-ray free-electron laser pulses

Author

Fukuzawa, H., Son, S. -K., Motomura, K., Mondal, S., Nagaya, K., Wada, S., Liu, X. -J., Feifel, R., Tachibana, T., Ito, Y., Kimura, M., Sakai, T., Matsunami, K., Hayashita, H., Kajikawa, J., Johnsson, P., Siano, M., Kukk, E., Rudek, B., Erk, B., Foucar, L., Robert, E., Miron, C., Tono, K., Inubushi, Y., Hatsui, T., Yabashi, M., Yao, M., Santra, R., and Ueda, K.

Subjects
Physics - Atomic Physics
Abstract

We have investigated multiphoton multiple ionization dynamics of argon and xenon atoms using a new x-ray free electron laser (XFEL) facility, SPring-8 Angstrom Compact free electron LAser (SACLA) in Japan, and identified that highly charged Xe ions with the charge state up to +26 are produced predominantly via four-photon absorption as well as highly charged Ar ions with the charge state up to +10 are produced via two-photon absorption at a photon energy of 5.5 keV. The absolute fluence of the XFEL pulse, needed for comparison between theory and experiment, has been determined using two-photon processes in the argon atom with the help of benchmark ab initio calculations. Our experimental results, in combination with a newly developed theoretical model for heavy atoms, demonstrate the occurrence of multiphoton absorption involving deep inner shells., Comment: 5 pages, 5 figures

Published
2012
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14. Indirect evidence for elemental hydrogen in laser-compressed hydrocarbons

Author

Kraus, D., primary, Vorberger, J., additional, Hartley, N. J., additional, Lütgert, J., additional, Rödel, M., additional, Chekrygina, D., additional, Döppner, T., additional, van Driel, T., additional, Falcone, R. W., additional, Fletcher, L. B., additional, Frydrych, S., additional, Galtier, E., additional, Gericke, D. O., additional, Glenzer, S. H., additional, Granados, E., additional, Inubushi, Y., additional, Kamimura, N., additional, Katagiri, K., additional, MacDonald, M. J., additional, MacKinnon, A. J., additional, Matsuoka, T., additional, Miyanishi, K., additional, McBride, E. E., additional, Nam, I., additional, Neumayer, P., additional, Ozaki, N., additional, Pak, A., additional, Ravasio, A., additional, Saunders, A. M., additional, Schuster, A. K., additional, Stevenson, M. G., additional, Sueda, K., additional, Sun, P., additional, Togashi, T., additional, Voigt, K., additional, Yabashi, M., additional, and Yabuuchi, T., additional

Published
2023
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15. Indirect evidence for elemental hydrogen in laser-compressed hydrocarbons

Author

(0000-0002-6350-4180) Kraus, D., (0000-0001-5926-9192) Vorberger, J., Hartley, N. J., Lütgert, J., Rödel, M., Chekrygina, D., Döppner, T., Driel, T., Falcone, R. W., Fletcher, L. B., Frydrych, S., Galtier, E., Gericke, D. O., Glenzer, S. H., Granados, E., Inubushi, Y., Kamimura, N., Katagiri, K., Macdonald, M. J., Mackinnon, A. J., Matsuoka, T., Miyanishi, K., McBride, E. E., Nam, I., Neumayer, P., Ozaki, N., Pak, A., Ravasio, A., Saunders, A. M., Schuster, A. K., Stevenson, M. G., Sueda, K., Sun, P., Togashi, T., Voigt, K., Yabashi, M., Yabuuchi, T., (0000-0002-6350-4180) Kraus, D., (0000-0001-5926-9192) Vorberger, J., Hartley, N. J., Lütgert, J., Rödel, M., Chekrygina, D., Döppner, T., Driel, T., Falcone, R. W., Fletcher, L. B., Frydrych, S., Galtier, E., Gericke, D. O., Glenzer, S. H., Granados, E., Inubushi, Y., Kamimura, N., Katagiri, K., Macdonald, M. J., Mackinnon, A. J., Matsuoka, T., Miyanishi, K., McBride, E. E., Nam, I., Neumayer, P., Ozaki, N., Pak, A., Ravasio, A., Saunders, A. M., Schuster, A. K., Stevenson, M. G., Sueda, K., Sun, P., Togashi, T., Voigt, K., Yabashi, M., and Yabuuchi, T.

Abstract

We demonstrate a significantly simplified experimental approach for investigating liquid metallic hydrogen, which is crucial to understand the internal structure and evolution of giant planets. Plastic samples were shockcompressed and then probed by short pulses of X-rays generated by free electron lasers. By comparison with ab initio simulations, we provide indirect evidence for the creation of elemental hydrogen in shock-compressed plastics at ∼150GPa and ∼5,000K and thus in a regime where hydrogen is predicted to be metallic. Being the most common form of condensed matter in our solar system, and ostensibly the simplest of all elements, hydrogen is the model case for many theoretical studies and we provide a new possibility to benchmark models for conditions with extreme pressures and temperatures. Moreover, this approach will also allow to probe the chemical behavior of metallic hydrogen in mixture with other elements, which, besides its importance for planetary physics, may open up promising pathways for the synthesis of new materials.

Published
2023

16. Corrigendum to ultrafast anisotropic disordering in graphite driven by intense hard X-ray pulses

Author

Hartley, N.J., primary, Grenzer, J., additional, Lu, W., additional, Huang, L.G., additional, Inubushi, Y., additional, Kamimura, N., additional, Katagiri, K., additional, Kodama, R., additional, Kon, A., additional, Lipp, V., additional, Makita, M., additional, Matsuoka, T., additional, Medvedev, N., additional, Nakajima, S., additional, Ozaki, N., additional, Pikuz, T., additional, Rode, A.V., additional, Sagae, D., additional, Schuster, A.K., additional, Tono, K., additional, Voigt, K., additional, Vorberger, J., additional, Yabuuchi, T., additional, and Kraus, D., additional

Published
2023
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19. Advanced high resolution x-ray diagnostic for HEDP experiments

Author

Faenov, A. Y., Pikuz, T. A., Mabey, P., Albertazzi, B., Michel, Th., Rigon, G., Pikuz, S. A., Buzmakov, A., Makarov, S., Ozaki, N., Matsuoka, T., Katagiri, K., Miyanishi, K., Takahashi, K., Tanaka, K. A., Inubushi, Y., Togashi, T., Yabuuchi, T., Yabashi, M., Casner, A., Kodama, R., and Koenig, M.

Published
2018
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20. Small Angle X-ray Scattering and particle measurements of sub-micron rod-assembly target at SACLA

Author

Sakawa, Youichi, Ota, M., Matsumoto, Y., Rodel, M., Pikuz, T., Pirozhkov, Alexander, Egashira, S., Takumi, Minami, Sakai, K., Ishihara, D., Kuramoto, O., Maeda, K., Abe, Y., Nakamura, H., Morace, A., Matsui, R., Yabuuchi, T., Miyanishi, K., Togashi, T., Inubushi, Y., Sueda, K., Ozaki, N., Kuramitsu, Y., L. Garcia, A., Fukami, K., Kluge, T., Kanasaki, M., Yamauchi, T., Yuji, Fukuda, Kishimoto, Y., Sakawa, Youichi, Ota, M., Matsumoto, Y., Rodel, M., Pikuz, T., Pirozhkov, Alexander, Egashira, S., Takumi, Minami, Sakai, K., Ishihara, D., Kuramoto, O., Maeda, K., Abe, Y., Nakamura, H., Morace, A., Matsui, R., Yabuuchi, T., Miyanishi, K., Togashi, T., Inubushi, Y., Sueda, K., Ozaki, N., Kuramitsu, Y., L. Garcia, A., Fukami, K., Kluge, T., Kanasaki, M., Yamauchi, T., Yuji, Fukuda, and Kishimoto, Y.

Abstract

We conduct SAXS measurement of sub-micron scale highly-ordered silicon-wire assembly targets (wire diameter: 500 nm, distance: 1 um, length: ~10 um, 15x3 array) to reveal temporal evolution of density profiles of 3D structure for the first time., International Conference on High Energy Density Science 2022

Published
2022

21. Diamond formation kinetics in shock-compressed C-H-O samples recorded by small-angle X-ray scattering and X-ray diffraction

Author

He, Z., Rödel, M., Lütgert, J., Bergermann, A., Bethkenhagen, M., Chekrygina, D., (0000-0002-5845-000X) Cowan, T., Descamps, A., French, M., Galtier, E., Gleason, A. E., Glenn, G. D., Glenzer, S. H., Inubushi, Y., (0000-0002-6268-2436) Hartley, N., Hernandez, J.-A., Heuser, B., (0000-0001-6748-0422) Humphries, O. S., Kamimura, N., Katagiri, K., Khaghani, D., Ja Lee, H., McBride, E. E., Miyanishi, K., Nagler, B., Ofori-Okai, B., Ozaki, N., Pandolfi, S., Qu, C., (0000-0002-8641-4794) Ranjan, D., Redmer, R., Schoenwaelder, C., (0000-0001-5489-5952) Schuster, A., Stevenson, M. G., Sueda, K., Togashi, T., Vinci, T., (0000-0001-8090-2626) Voigt, K., (0000-0001-5926-9192) Vorberger, J., Yabashi, M., Yabuuchi, T., Zinta, L. M. V., Ravasio, A., (0000-0002-6350-4180) Kraus, D., He, Z., Rödel, M., Lütgert, J., Bergermann, A., Bethkenhagen, M., Chekrygina, D., (0000-0002-5845-000X) Cowan, T., Descamps, A., French, M., Galtier, E., Gleason, A. E., Glenn, G. D., Glenzer, S. H., Inubushi, Y., (0000-0002-6268-2436) Hartley, N., Hernandez, J.-A., Heuser, B., (0000-0001-6748-0422) Humphries, O. S., Kamimura, N., Katagiri, K., Khaghani, D., Ja Lee, H., McBride, E. E., Miyanishi, K., Nagler, B., Ofori-Okai, B., Ozaki, N., Pandolfi, S., Qu, C., (0000-0002-8641-4794) Ranjan, D., Redmer, R., Schoenwaelder, C., (0000-0001-5489-5952) Schuster, A., Stevenson, M. G., Sueda, K., Togashi, T., Vinci, T., (0000-0001-8090-2626) Voigt, K., (0000-0001-5926-9192) Vorberger, J., Yabashi, M., Yabuuchi, T., Zinta, L. M. V., Ravasio, A., and (0000-0002-6350-4180) Kraus, D.

Abstract

Extreme conditions inside ice giants like Uranus and Neptune can result in peculiar chemistry and structural transitions, e.g., the precipitation of diamonds or superionic water, as so far experimentally observed only for pure C-H and H2O systems, respectively. Here we investigate a stoichiometric mixture of C and H2O by shock-compressing PET plastics and performing in situ X-ray probing. We observe diamond formation at pressures between 72±7 GPa and 125±13 GPa at temperatures ranging from ~3500 K to ~6000 K. Combining X-ray diffraction and small angle X-ray scattering, we access the kinetics of this exotic reaction. The observed demixing of C and H2O suggests that diamond precipitation inside the ice giants is enhanced by oxygen, which can lead to isolated water and thus the formation of superionic structures relevant to the planets’ magnetic fields. Moreover, our measurements indicate a way of producing nanodiamonds by simple laser-driven shock-compression of cheap PET plastics.

Published
2022

22. X-ray diffraction study of phase transformation dynamics of Fe and Fe-Si alloys along the shock Hugoniot using an x-ray free electron laser

Author

Krygier, A., primary, Harmand, M., additional, Albertazzi, B., additional, McBride, E. E., additional, Miyanishi, K., additional, Antonangeli, D., additional, Inubushi, Y., additional, Kodama, R., additional, Koenig, M., additional, Matsuoka, T., additional, Mogni, G., additional, Pietrucci, F., additional, Saitta, A. M., additional, Togashi, T., additional, Umeda, Y., additional, Vinci, T., additional, Yabashi, M., additional, Yabuuchi, T., additional, Fiquet, G., additional, and Ozaki, N., additional

Published
2022
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23. Erratum: Using Diffuse Scattering to Observe X-Ray-Driven Nonthermal Melting [Phys. Rev. Lett. 126 , 015703 (2021)]

Author

Hartley, N. J., primary, Grenzer, J., additional, Huang, L., additional, Inubushi, Y., additional, Kamimura, N., additional, Katagiri, K., additional, Kodama, R., additional, Kon, A., additional, Lu, W., additional, Makita, M., additional, Matsuoka, T., additional, Nakajima, S., additional, Ozaki, N., additional, Pikuz, T., additional, Rode, A., additional, Sagae, D., additional, Schuster, A. K., additional, Tono, K., additional, Voigt, K., additional, Vorberger, J., additional, Yabuuchi, T., additional, McBride, E. E., additional, and Kraus, D., additional

Published
2022
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24. Hugoniot equation-of-state and structure of laser-shocked polyimide C22H10N2O5

Author

Katagiri, K., primary, Ozaki, N., additional, Murayama, D., additional, Nonaka, K., additional, Hironaka, Y., additional, Inubushi, Y., additional, Miyanishi, K., additional, Nakamura, H., additional, Okuchi, T., additional, Sano, T., additional, Seto, Y., additional, Shigemori, K., additional, Sueda, K., additional, Togashi, T., additional, Umeda, Y., additional, Yabashi, M., additional, Yabuuchi, T., additional, and Kodama, R., additional

Published
2022
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25. Polarization control with an X-ray phase retarder for high-time-resolution pump–probe experiments at SACLA1

Author

Kubota, Y., Suzuki, M., Katayama, T., Yamamoto, K., Tono, K., Inubushi, Y., Seki, T., Takanashi, K., Wadati, H., and Yabashi, M.

Subjects
polarization, X-ray free-electron lasers, Research Papers, dynamical theory of diffraction
Abstract

Polarization control using an X-ray phase retarder in combination with an arrival timing diagnostic on BL3 of SACLA is reported., Control of the polarization of an X-ray free-electron laser (XFEL) has been performed using an X-ray phase retarder (XPR) in combination with an arrival timing diagnostic on BL3 of the SPring-8 Angstrom Compact free-electron LAser (SACLA). To combine with the timing diagnostic, a pink beam was incident on the XPR crystal and then monochromated in the vicinity of samples. A high degree of circular polarization of ∼97% was obtained experimentally at 11.567 keV, which agreed with calculations based on the dynamical theory of X-ray diffraction. This system enables pump–probe experiments to be operated using circular polarization with a time resolution of 40 fs to investigate ultrafast magnetic phenomena.

Published
2019

26. Using Diffuse Scattering to Observe X-Ray-Driven Nonthermal Melting

Author

(0000-0002-6268-2436) Hartley, N., Grenzer, J., (0000-0003-1184-2097) Huang, L., Inubushi, Y., Kamimura, N., Katagiri, K., Kodama, R., Kon, A., Lu, W., Makita, M., Matsuoka, T., Nakajima, S., Ozaki, N., Pikuz, T., Rode, A. V., Sagae, D., (0000-0001-5489-5952) Schuster, A., Tono, K., (0000-0001-8090-2626) Voigt, K., (0000-0001-5926-9192) Vorberger, J., Yabuuchi, T., McBride, E. E., (0000-0002-6350-4180) Kraus, D., (0000-0002-6268-2436) Hartley, N., Grenzer, J., (0000-0003-1184-2097) Huang, L., Inubushi, Y., Kamimura, N., Katagiri, K., Kodama, R., Kon, A., Lu, W., Makita, M., Matsuoka, T., Nakajima, S., Ozaki, N., Pikuz, T., Rode, A. V., Sagae, D., (0000-0001-5489-5952) Schuster, A., Tono, K., (0000-0001-8090-2626) Voigt, K., (0000-0001-5926-9192) Vorberger, J., Yabuuchi, T., McBride, E. E., and (0000-0002-6350-4180) Kraus, D.

Abstract

We present results from the SPring-8 Angstrom Compact free electron LAser facility, where we used a high intensity (∼10^20 W/cm2) x-ray pump x-ray probe scheme to observe changes in the ionic structure of silicon induced by x-ray heating of the electrons. By avoiding Laue spots in the scattering signal from a single crystalline sample, we observe a rapid rise in diffuse scattering and a transition to a disordered, liquidlike state with a structure significantly different from liquid silicon. The disordering occurs within 100 fs of irradiation, a timescale that agrees well with first principles simulations, and is faster than that predicted by purely inertial behavior, suggesting that both the phase change and disordered state reached are dominated by Coulomb forces. This method is capable of observing liquid scattering without masking signal from the ambient solid, allowing the liquid structure to be measured throughout and beyond the phase change.

Published
2021

27. Liquid Structure of Tantalum under Internal Negative Pressure

Author

Katagiri, K., primary, Ozaki, N., additional, Ohmura, S., additional, Albertazzi, B., additional, Hironaka, Y., additional, Inubushi, Y., additional, Ishida, K., additional, Koenig, M., additional, Miyanishi, K., additional, Nakamura, H., additional, Nishikino, M., additional, Okuchi, T., additional, Sato, T., additional, Seto, Y., additional, Shigemori, K., additional, Sueda, K., additional, Tange, Y., additional, Togashi, T., additional, Umeda, Y., additional, Yabashi, M., additional, Yabuuchi, T., additional, and Kodama, R., additional

Published
2021
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28. In Situ Characterization of XFEL Beam Intensity Distribution and Focusability by High-Resolution LiF Crystal Detector

Author

A., Pikuz T., Ya., Faenov A., Matsuoka, T., Albertazzi, B., Ozaki, N., Hartely, N., Muray, Ricardo Arturo O., Yabuuchi, T., Habara, H., Matsuyama, S., Yamauchi, K., Inubushi, Y., Togashi, T., yumoto, H., Tange, Y., Tono, K., Sato, Y., Yabashi, M., Mitrofanov, A., A., Pikuz S., Bleiner, D., Grum-Grzhimailo, A., N., Rosanov N., V., Vysotina N., Harmand, M., Koenig, M., A., Tanaka K., and Ishikawa, T.

Abstract

We present here a new diagnostics based on using LiF crystal detectors that are able to perform measurements an intensity distribution of X-rays beams with diameters ranging from some microns up to some centimeters with high spatial resolution (~1 micron). in situ, 3D visualization of SACLA XFEL focused beam profile along propagation, including propagation inside photoluminescence solid materials, is demonstrated.

Published
2018

30. X-ray radiography based on the phase-contrast imaging with using LiF detector

Author

Makarov, S S, primary, Pikuz, T A, additional, Buzmakov, A V, additional, Chernyaev, A P, additional, Mabey, P, additional, Vinci, T, additional, Rigon, G, additional, Albertazzi, B, additional, Casner, A, additional, Bouffetier, V, additional, Kodama, R, additional, Katagiri, K, additional, Kamimura, N, additional, Umeda, Y, additional, Ozaki, N, additional, Falize, E, additional, Poujade, O, additional, Togashi, T, additional, Yabashi, M, additional, Yabuuchi, T, additional, Inubushi, Y, additional, Miyanishi, K, additional, Sueda, K, additional, Manuel, M, additional, Gregori, G, additional, Koenig, M, additional, and Pikuz, S A, additional

Published
2021
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31. Using Diffuse Scattering to Observe X-Ray-Driven Nonthermal Melting

Author

Hartley, N. J., primary, Grenzer, J., additional, Huang, L., additional, Inubushi, Y., additional, Kamimura, N., additional, Katagiri, K., additional, Kodama, R., additional, Kon, A., additional, Lu, W., additional, Makita, M., additional, Matsuoka, T., additional, Nakajima, S., additional, Ozaki, N., additional, Pikuz, T., additional, Rode, A. V., additional, Sagae, D., additional, Schuster, A. K., additional, Tono, K., additional, Voigt, K., additional, Vorberger, J., additional, Yabuuchi, T., additional, McBride, E. E., additional, and Kraus, D., additional

Published
2021
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33. Ablation threshold and crater morphology of amorphous and crystalline SiO2 glass for extreme ultraviolet femtosecond pulses

Author

Shibuya, T., primary, Sakaue, K., additional, Ogawa, H., additional, Dinh, T.-H., additional, Satoh, D., additional, Terasawa, E., additional, Washio, M., additional, Tanaka, M., additional, Higashiguchi, T., additional, Ishino, M., additional, Kubota, Y., additional, Inubushi, Y., additional, Owada, S., additional, Nishikino, M., additional, Kobayashi, Y., additional, and Kuroda, R., additional

Published
2020
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35. Coherent X-ray beam metrology using 2D high-resolution Fresnel-diffraction analysis

Author

Ruiz-Lopez, M., Faenov, A., Pikuz, T., Ozaki, N., Mitrofanov, A., Albertazzi, B., Hartley, N., Matsuoka, T., Ochante, Y., Tange, Y., Yabuuchi, T., Habara, T., A., Tanaka K., Inubushi, Y., Yabashi, M., Nishikino, M., Kawachi, T., Pikuz, S., Ishikawa, T., and Kodama, R.

Subjects
Physics::Instrumentation and Detectors, Physics::Optics, Physics::Accelerator Physics
Abstract

Direct metrology of coherent short-wavelength beamlines is important for obtaining operational beam characteristics at the experimental site. However, since beam-time limitation imposes fast metrology procedures, a multi- parametric metrology from as low as a single shot is desirable. Here a two- dimensional (2D) procedure based on high-resolution Fresnel diffraction analysis is discussed and applied, which allowed an efficient and detailed beamline characterization at the SACLA XFEL. So far, the potential of Fresnel diffraction for beamline metrology has not been fully exploited because its high- frequency fringes could be only partly resolved with ordinary pixel-limited detectors. Using the high-spatial-frequency imaging capability of an irradiated LiF crystal, 2D information of the coherence degree, beam divergence and beam quality factor M2 were retrieved from simple diffraction patterns. The developed beam metrology was validated with a laboratory reference laser, and then successfully applied at a beamline facility, in agreement with the source specifications.

Published
2017

36. Evaluation of Pulse Duration of the Soft X-ray Free Electron Laser at SACLA BL1 with Single-Shot Spectrometry

Author

Kubota, Y, Inoue, I, Togawa, K, Kinjo, R, Iwayama, H, Inubushi, Y, Owada, S, Tono, K, Tanaka, T, Hara, T, and Harries, James

Abstract

We performed single-shot spectrometry to evaluate the pulse duration of the soft X-ray free electron laser (FEL) at BL1 of SPring-8 Angstrom Compact free electron LAser (SACLA). The soft X-ray FEL beam was focused with a Kirkpatrick-Baez (KB) focusing mirror system and single-shot spectra were measured with a grating and a two dimensional detector. The spike widths of the spectra, which are inversely proportional to the pulse duration, varied when we changed the operation conditions of the accelerator. By comparing the spike widths with a simulation, the pulse duration was evaluated to be less than 100 fs.

Published
2019

37. Kinetic Simulations of Target Heating, Ionization and Micro-Explosion with High Intensity XFEL Beams

Author

Huang, L., Hartley, N., Hau-Riege, S., Inubushi, Y., Kamimura, N., Katagiri, K., Kodama, R., Kon, A., Makita, M., Matsuoka, T., Nakajima, S., Pikuz, T., Rode, A., Rohatsch, K., Sagae, D., Schuster, A., Tono, K., Lu, W., Yabuuchi, T., Ozaki, N., Kraus, D., and Cowan, T.

Subjects
Pump-Probe Experiment, Kinect Simulations, XFEL, Radiation Transport, Physics::Atomic and Molecular Clusters
Abstract

High intensity X-ray Free Electron Lasers (XFEL) are an ideal tool to heat materials directly and isochorically, which can cause them to be modified and damaged irreversibly. During XFEL-matter interactions, the energy of an XFEL beam will be mainly absorbed by photoionization, creating numerous high-energy photo- and Auger electrons. Modelling this process is quite complex since both atomic physics and plasma physics are involved. Atomic collisional-radiative (CR) codes such as FLYCHK are widely used to simulate such processes. However, the CR codes typically assume local thermodynamic equilibrium (LTE) and are limited to zero dimension. In order to understand the sample damaging mechanisms, we performed two-dimensional kinetic particle-in-cell simulations with radiation transport (PIC-RT) to retrieve the temporal processes of XFEL-matter interactions. The dynamics of XFEL-Matter interactions can roughly divide into three different time scales: 1) electron heating and photoionization by XFEL in ~ 10 fs ; 2) collisional heating and ionization by high-energy photo- and Auger electrons with several keV energy in tens of fs to sub-ps; and 3) collective hydrodynamic explosion driven by ~ TPa thermal pressure from ~100 fs to nanoseconds. The simulation results are compared to our recent experiment that a variety of samples were irradiated by Japanese XFEL SACLA with intensities on the order of 10^20 W/cm^2. The post-analysis of the irradiated samples showed that large holes with radius sizes more than one order of magnitude higher than the XFEL spot were created for metallic samples. The hole size is also much larger than the stopping range of high energy electrons. According to our PIC-RT simulations, we attribute the generation of such large holes to the micro-explosion process. Kinect simulation of the hole generation with multiple time scales is also useful and complementary to understand the change of X-Ray diffraction pattern in the experiment that infers significant material structural change on femtosecond timescales.

Published
2019

38. Indirect monitoring shot-to-shot shock waves strength reproducibility during pump–probe experiments.

Author

Pikuz, T. A., Faenov, A. Ya., Ozaki, N., Hartley, N. J., Albertazzi, B., Matsuoka, T., Takahashi, K., Habara, H., Tange, Y., Matsuyama, S., Yamauchi, K., Ochante, R., Sueda, K., Sakata, O., Sekine, T., Sato, T., Umeda, Y., Inubushi, Y., Yabuuchi, T., and Togashi, T.

Subjects
SHOCK waves, X-ray emission spectroscopy, X-ray spectrometers, ELECTRON plasma, LASER pulses
Abstract

We present an indirect method of estimating the strength of a shock wave, allowing on line monitoring of its reproducibility in each laser shot. This method is based on a shot-to-shot measurement of the X-ray emission from the ablated plasma by a high resolution, spatially resolved focusing spectrometer. An optical pump laser with energy of 1.0 J and pulse duration of ∼660 ps was used to irradiate solid targets or foils with various thicknesses containing Oxygen, Aluminum, Iron, and Tantalum. The high sensitivity and resolving power of the X-ray spectrometer allowed spectra to be obtained on each laser shot and to control fluctuations of the spectral intensity emitted by different plasmas with an accuracy of ∼2%, implying an accuracy in the derived electron plasma temperature of 5%-10% in pump-probe high energy density science experiments. At nano- and sub-nanosecond duration of laser pulse with relatively low laser intensities and ratio Z/A∼0.5, the electron temperature follows Te∼Ilas2/3. Thus, measurements of the electron plasma temperature allow indirect estimation of the laser flux on the target and control its shot-to-shot fluctuation. Knowing the laser flux intensity and its fluctuation gives us the possibility of monitoring shot-to-shot reproducibility of shock wave strength generation with high accuracy. [ABSTRACT FROM AUTHOR]

Published
2016
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39. Kinetic Simulations of Target Heating, Ionization and Micro-Explosion with High Intensity XFEL Beams

Author

(0000-0003-1184-2097) Huang, L., (0000-0002-6268-2436) Hartley, N., Hau-Riege, S., Inubushi, Y., Kamimura, N., Katagiri, K., Kodama, R., Kon, A., Makita, M., Matsuoka, T., Nakajima, S., Pikuz, T., Rode, A., Rohatsch, K., Sagae, D., Schuster, A., Tono, K., Lu, W., Yabuuchi, T., Ozaki, N., (0000-0002-6350-4180) Kraus, D., (0000-0002-5845-000X) Cowan, T., (0000-0003-1184-2097) Huang, L., (0000-0002-6268-2436) Hartley, N., Hau-Riege, S., Inubushi, Y., Kamimura, N., Katagiri, K., Kodama, R., Kon, A., Makita, M., Matsuoka, T., Nakajima, S., Pikuz, T., Rode, A., Rohatsch, K., Sagae, D., Schuster, A., Tono, K., Lu, W., Yabuuchi, T., Ozaki, N., (0000-0002-6350-4180) Kraus, D., and (0000-0002-5845-000X) Cowan, T.

Abstract

High intensity X-ray Free Electron Lasers (XFEL) are an ideal tool to heat materials directly and isochorically, which can cause them to be modified and damaged irreversibly. During XFEL-matter interactions, the energy of an XFEL beam will be mainly absorbed by photoionization, creating numerous high-energy photo- and Auger electrons. Modelling this process is quite complex since both atomic physics and plasma physics are involved. Atomic collisional-radiative (CR) codes such as FLYCHK are widely used to simulate such processes. However, the CR codes typically assume local thermodynamic equilibrium (LTE) and are limited to zero dimension. In order to understand the sample damaging mechanisms, we performed two-dimensional kinetic particle-in-cell simulations with radiation transport (PIC-RT) to retrieve the temporal processes of XFEL-matter interactions. The dynamics of XFEL-Matter interactions can roughly divide into three different time scales: 1) electron heating and photoionization by XFEL in ~ 10 fs ; 2) collisional heating and ionization by high-energy photo- and Auger electrons with several keV energy in tens of fs to sub-ps; and 3) collective hydrodynamic explosion driven by ~ TPa thermal pressure from ~100 fs to nanoseconds. The simulation results are compared to our recent experiment that a variety of samples were irradiated by Japanese XFEL SACLA with intensities on the order of 10^20 W/cm^2. The post-analysis of the irradiated samples showed that large holes with radius sizes more than one order of magnitude higher than the XFEL spot were created for metallic samples. The hole size is also much larger than the stopping range of high energy electrons. According to our PIC-RT simulations, we attribute the generation of such large holes to the micro-explosion process. Kinect simulation of the hole generation with multiple time scales is also useful and complementary to understand the change of X-Ray diffraction pattern in the experiment that infers significa

Published
2019

40. Ultrafast Anisotropic Disordering in Graphite Driven by Intense Hard X-ray Pulses

Author

(0000-0002-6268-2436) Hartley, N., Grenzer, J., Lu, W., (0000-0003-1184-2097) Huang, L., Inubushi, Y., Kamimura, N., Katagiri, K., Kodama, R., Kon, A., Lipp, V., Makita, M., Matsuoka, T., Medvedev, N., Nakajima, S., Ozaki, N., Pikuz, T., Rode, A. V., Rohatsch, K., Sagae, D., (0000-0001-5489-5952) Schuster, A., Tono, K., (0000-0001-5926-9192) Vorberger, J., Yabuuchi, T., (0000-0002-6350-4180) Kraus, D., (0000-0002-6268-2436) Hartley, N., Grenzer, J., Lu, W., (0000-0003-1184-2097) Huang, L., Inubushi, Y., Kamimura, N., Katagiri, K., Kodama, R., Kon, A., Lipp, V., Makita, M., Matsuoka, T., Medvedev, N., Nakajima, S., Ozaki, N., Pikuz, T., Rode, A. V., Rohatsch, K., Sagae, D., (0000-0001-5489-5952) Schuster, A., Tono, K., (0000-0001-5926-9192) Vorberger, J., Yabuuchi, T., and (0000-0002-6350-4180) Kraus, D.

Abstract

We present results from the SPring-8 Angstrom Compact free electron LAser (SACLA) X-ray free electron laser (XFEL) facility, using an X-ray pump, X-ray probe scheme to observe ultrafast changes in the structure of heated graphite. The 9.8 keV XFEL beam was focused to give an intensity on the order of 10^19 W/cm2, and the evolution of the diffraction pattern observed up to delays of 300 fs. The interplanar diffraction peaks weaken significantly within 10s of femtoseconds, but in-plane diffraction orders i.e. those with Miller Index (hk0), persist up to 300 fs, with the observed signal increasing. We interpret this as nonthermal damage through the breaking of interplanar bonds, which at longer timescales leads to ablation by removal of intact graphite sheets. Post-experiment examination of the graphite samples shows damage which is comparable in size to the range of the excited photoelectrons. These results highlight the challenges of accurately modelling X-ray driven heating, as it becomes a routine approach to generating high energy density states.

Published
2019

41. Dynamics of the photoinduced insulator-to-metal transition in a nickelate film

Author

Esposito, V., Rettig, L., Bothschafter, E., Deng, Y., Dornes, C., Huber, L., Huber, T., Ingold, G., Inubushi, Y., Katayama, T., Kawaguchi, T., Lemke, H., Ogawa, K., Owada, S., Radovic, M., Ramakrishnan, M., Ristic, Z., Scagnoli, V., Tanaka, Y., Togashi, T., Tono, K., Usov, I., Windsor, Y., Yabashi, M., Johnson, S., Beaud, P., and Staub, U.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter::Materials Science, Strongly Correlated Electrons (cond-mat.str-el), lcsh:QD901-999, FOS: Physical sciences, Condensed Matter::Strongly Correlated Electrons, lcsh:Crystallography, Articles, Materials
Abstract

The control of materials properties with light is a promising approach towards the realization of faster and smaller electronic devices. With phases that can be controlled via strain, pressure, chemical composition or dimensionality, nickelates are good candidates for the development of a new generation of high performance and low consumption devices. Here we analyze the photoinduced dynamics in a single crystalline NdNiO$_3$ film upon excitation across the electronic gap. Using time-resolved reflectivity and resonant x-ray diffraction, we show that the pump pulse induces an insulator-to-metal transition, accompanied by the melting of the charge order. Finally we compare our results to similar studies in manganites and show that the same model can be used to describe the dynamics in nickelates, hinting towards a unified description of these photoinduced phase transitions., Comment: 17 pages, 6 figures

Published
2018

42. Erratum: “Fluence thresholds for grazing incidence hard x-ray mirrors” [Appl. Phys. Lett. 106, 241905 (2015)]

Author

Aquila, A., primary, Sobierajski, R., additional, Ozkan, C., additional, Hájková, V., additional, Burian, T., additional, Chalupský, J., additional, Juha, L., additional, Störmer, M., additional, Bajt, S., additional, Klepka, M. T., additional, Dłużewski, P., additional, Morawiec, K., additional, Ohashi, H., additional, Koyama, T., additional, Tono, K., additional, Inubushi, Y., additional, Yabashi, M., additional, Sinn, H., additional, Tschentscher, T., additional, Mancuso, A. P., additional, and Gaudin, J., additional

Published
2019
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43. Development of new diagnostics based on LiF detector for pump-probe experiments

Author

Pikuz, T., primary, Faenov, A., additional, Ozaki, N., additional, Matsuoka, T., additional, Albertazzi, B., additional, Hartley, N.J., additional, Miyanishi, K., additional, Katagiri, K., additional, Matsuyama, S., additional, Yamauchi, K., additional, Habara, H., additional, Inubushi, Y., additional, Togashi, T., additional, Yumoto, H., additional, Ohashi, H., additional, Tange, Y., additional, Yabuuchi, T., additional, Yabashi, M., additional, Grum-Grzhimailo, A.N., additional, Casner, A., additional, Skobelev, I., additional, Makarov, S., additional, Pikuz, S., additional, Rigon, G., additional, Koenig, M., additional, Tanaka, K.A., additional, Ishikawa, T., additional, and Kodama, R., additional

Published
2018
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45. Ultrafast observation of lattice dynamics in laser-irradiated gold foils

Author

Hartley, N. J., 1000070432515, Ozaki, N., 1000070581635, Matsuoka, T., Albertazzi, B., Faenov, A., Fujimoto, Y., 1000060397734, Habara, H., Harmand, M., 1000040506250, Inubushi, Y., 1000090648073, Katayama, T., Koenig, M., Krygier, A., Mabey, P., Matsumura, Y., 1000010423196, Matsuyama, S., McBride, E. E., Miyanishi, K., Morard, G., Okuchi, T., Pikuz, T., 1000040215629, Sakata, O., 1000040252598, Sano, Y., Sato, T., Sekine, T., Seto, Y., Takahashi, K., 1000070171741, Tanaka, K. A., 1000070543164, Tange, Y., 1000060415239, Togashi, T., Umeda, Y., Vinci, T., 1000000372144, Yabashi, M., 1000020397772, Yabuuchi, T., 1000010174575, Yamauchi, K., 1000080211902, Kodama, R., Hartley, N. J., 1000070432515, Ozaki, N., 1000070581635, Matsuoka, T., Albertazzi, B., Faenov, A., Fujimoto, Y., 1000060397734, Habara, H., Harmand, M., 1000040506250, Inubushi, Y., 1000090648073, Katayama, T., Koenig, M., Krygier, A., Mabey, P., Matsumura, Y., 1000010423196, Matsuyama, S., McBride, E. E., Miyanishi, K., Morard, G., Okuchi, T., Pikuz, T., 1000040215629, Sakata, O., 1000040252598, Sano, Y., Sato, T., Sekine, T., Seto, Y., Takahashi, K., 1000070171741, Tanaka, K. A., 1000070543164, Tange, Y., 1000060415239, Togashi, T., Umeda, Y., Vinci, T., 1000000372144, Yabashi, M., 1000020397772, Yabuuchi, T., 1000010174575, Yamauchi, K., 1000080211902, and Kodama, R.

Abstract

N. J. Hartley, N. Ozaki, T. Matsuoka, B. Albertazzi, A. Faenov, Y. Fujimoto, H. Habara, M. Harmand, Y. Inubushi, T. Katayama, M. Koenig, A. Krygier, P. Mabey, Y. Matsumura, S. Matsuyama, E. E. McBride, K. Miyanishi, G. Morard, T. Okuchi, T. Pikuz, O. Sakata, Y. Sano, T. Sato, T. Sekine, Y. Seto, K. Takahashi, K. A. Tanaka, Y. Tange, T. Togashi, Y. Umeda, T. Vinci, M. Yabashi, T. Yabuuchi, K. Yamauchi, and R. Kodama , "Ultrafast observation of lattice dynamics in laser-irradiated gold foils", Appl. Phys. Lett. 110, 071905 (2017) https://doi.org/10.1063/1.4976541., We have observed the lattice expansion before the onset of compression in an optical-laser-driven target, using diffraction of femtosecond X-ray beams generated by the SPring-8 Angstrom Compact Free-electron Laser. The change in diffraction angle provides a direct measure of the lattice spacing, allowing the density to be calculated with a precision of ±1%. From the known equation of state relations, this allows an estimation of the temperature responsible for the expansion as <1000 K. The subsequent ablation-driven compression was observed with a clear rise in density at later times. This demonstrates the feasibility of studying the dynamics of preheating and shock formation with unprecedented detail.

Published
2017

46. Ultrafast observation of lattice dynamics in laser-irradiated gold foils

Author

(0000-0002-6268-2436) Hartley, N. J., Ozaki, N., Matsuoka, T., Albertazzi, B., Faenov, A., Fujimoto, Y., Habara, H., Harmand, M., Inubushi, Y., Katayama, T., Koenig, M., Krygier, A., Mabey, P., Matsumura, Y., Matsuyama, S., Mcbride, E. E., Miyanishi, K., Morard, G., Okuchi, T., Pikuz, T., Sakata, O., Sano, Y., Sato, T., Sekine, T., Seto, Y., Takahashi, K., Tanaka, K. A., Tange, Y., Togashi, T., Umeda, Y., Vinci, T., Yabashi, M., Yabuuchi, T., Yamauchi, K., Kodama, R., (0000-0002-6268-2436) Hartley, N. J., Ozaki, N., Matsuoka, T., Albertazzi, B., Faenov, A., Fujimoto, Y., Habara, H., Harmand, M., Inubushi, Y., Katayama, T., Koenig, M., Krygier, A., Mabey, P., Matsumura, Y., Matsuyama, S., Mcbride, E. E., Miyanishi, K., Morard, G., Okuchi, T., Pikuz, T., Sakata, O., Sano, Y., Sato, T., Sekine, T., Seto, Y., Takahashi, K., Tanaka, K. A., Tange, Y., Togashi, T., Umeda, Y., Vinci, T., Yabashi, M., Yabuuchi, T., Yamauchi, K., and Kodama, R.

Abstract

We have observed lattice expansion before the onset of compression in an optical-laser-driven target, using diffraction of femtosecond X-ray beams generated by the SACLA X-ray Free Electron Laser. The change in diffraction angle provides a direct measure of the lattice spacing, allowing the density to be calculated with a precision of +-1%. From known equation of state relations this allows estimation of the temperature responsible for the expansion as <1000 K. The subsequent ablation-driven compression was observed with a clear rise in density at later times. This demonstrates the feasibility of studying the dynamics of preheating and shock formation with unprecedented detail.

Published
2017

47. Search for Two-Photon Interaction with Axionlike Particles Using High-Repetition Pulsed Magnets and Synchrotron X Rays

Author

Inada, T., primary, Yamazaki, T., additional, Namba, T., additional, Asai, S., additional, Kobayashi, T., additional, Tamasaku, K., additional, Tanaka, Y., additional, Inubushi, Y., additional, Sawada, K., additional, Yabashi, M., additional, Ishikawa, T., additional, Matsuo, A., additional, Kawaguchi, K., additional, Kindo, K., additional, and Nojiri, H., additional

Published
2017
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48. Ultrafast observation of lattice dynamics in laser-irradiated gold foils

Author

Hartley, N. J., primary, Ozaki, N., additional, Matsuoka, T., additional, Albertazzi, B., additional, Faenov, A., additional, Fujimoto, Y., additional, Habara, H., additional, Harmand, M., additional, Inubushi, Y., additional, Katayama, T., additional, Koenig, M., additional, Krygier, A., additional, Mabey, P., additional, Matsumura, Y., additional, Matsuyama, S., additional, McBride, E. E., additional, Miyanishi, K., additional, Morard, G., additional, Okuchi, T., additional, Pikuz, T., additional, Sakata, O., additional, Sano, Y., additional, Sato, T., additional, Sekine, T., additional, Seto, Y., additional, Takahashi, K., additional, Tanaka, K. A., additional, Tange, Y., additional, Togashi, T., additional, Umeda, Y., additional, Vinci, T., additional, Yabashi, M., additional, Yabuuchi, T., additional, Yamauchi, K., additional, and Kodama, R., additional

Published
2017
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49. Electron spectroscopy of rare-gas clusters irradiated by x-ray free-electron laser pulses from SACLA

Author

Fukuzawa, H., Tachibana, T., Motomura, K., Xu, W. Q., Nagaya, K., Wada, S., Johnsson, P., Siano, M., Mondal, S., Ito, Y., Kimura, M., Sakai, T., Matsunami, K., Hayashita, H., Kajikawa, J., Liu, X-J, Robert, E., Miron, C., Feifel, Raimund, Marangos, J. P., Tono, K., Inubushi, Y., Yabashi, M., Yao, M., Ueda, K., Fukuzawa, H., Tachibana, T., Motomura, K., Xu, W. Q., Nagaya, K., Wada, S., Johnsson, P., Siano, M., Mondal, S., Ito, Y., Kimura, M., Sakai, T., Matsunami, K., Hayashita, H., Kajikawa, J., Liu, X-J, Robert, E., Miron, C., Feifel, Raimund, Marangos, J. P., Tono, K., Inubushi, Y., Yabashi, M., Yao, M., and Ueda, K.

Abstract

We have measured electron energy spectra and asymmetry parameters of Ar clusters and Xe clusters illuminated by intense x-rays at 5 and 5.5 keV. A velocity map imaging spectrometer was developed for this purpose and employed at an x-ray free-electron laser facility, SACLA in Japan. The cluster size dependence and the peak fluence dependence of the electron spectra and asymmetry parameters are discussed.

Published
2016
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