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889 results on '"A. Faenov"'

1. Development of new diagnostics based on LiF detector for pump-probe experiments

Author

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

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

We present new diagnostics for use in optical laser pump - X-ray Free Electron Laser (XFEL) probe experiments to monitor dimensions, intensity profile and focusability of the XFEL beam and to control initial quality and homogeneity of targets to be driven by optical laser pulse. By developing X-ray imaging, based on the use of an LiF crystal detector, we were able to measure the distribution of energy inside a hard X-ray beam with unprecedented high spatial resolution (∼1 μm) and across a field of view larger than some millimetres. This diagnostic can be used in situ, provides a very high dynamic range, has an extremely limited cost, and is relatively easy to be implemented in pump-probe experiments. The proposed methods were successfully applied in pump-probe experiments at the SPring-8 Angstrom Compact free electron LAser (SACLA) XFEL facility and its potential was demonstrated for current and future High Energy Density Science experiments.

Published
2018
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2. Demonstration of repetitive energetic proton generation by ultra-intense laser interaction with a tape target

Author

Dover, N.P., Nishiuchi, M., Sakaki, H., Kondo, Ko., Lowe, H.F., Alkhimova, M.A., Ditter, E.J., Ettlinger, O.C., Faenov, A.Ya., Hata, M., Hicks, G.S., Iwata, N., Kiriyama, H., Koga, J.K., Miyahara, T., Najmudin, Z., Pikuz, T.A., Pirozhkov, A.S., Sagisaka, A., Schramm, U., Sentoku, Y., Watanabe, Y., Ziegler, T., Zeil, K., Kando, M., and Kondo, K.

Published
2020
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3. Optimization of a laser plasma-based x-ray source according to WDM absorption spectroscopy requirements

Author

A. S. Martynenko, S. A. Pikuz, I. Yu. Skobelev, S. N. Ryazantsev, C. D. Baird, N. Booth, L. N. K. Döhl, P. Durey, A. Ya. Faenov, D. Farley, R. Kodama, K. Lancaster, P. McKenna, C. D. Murphy, C. Spindloe, T. A. Pikuz, and N. Woolsey

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

X-ray absorption spectroscopy is a well-accepted diagnostic for experimental studies of warm dense matter. It requires a short-lived X-ray source of sufficiently high emissivity and without characteristic lines in the spectral range of interest. In the present work, we discuss how to choose an optimum material and thickness to get a bright source in the wavelength range 2 Å–6 Å (∼2 keV to 6 keV) by considering relatively low-Z elements. We demonstrate that the highest emissivity of solid aluminum and silicon foil targets irradiated with a 1-ps high-contrast sub-kJ laser pulse is achieved when the target thickness is close to 10 µm. An outer plastic layer can increase the emissivity even further.

Published
2021
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4. Observation of the inhomogeneous spatial distribution of MeV ions accelerated by the hydrodynamic ambipolar expansion of clusters

Author

Kanasaki, Masato, Jinno, Satoshi, Sakaki, Hironao, Faenov, Anatoly Ya., Pikuz, Tatiana A., Nishiuchi, Mamiko, Kiriyama, Hiromitsu, Kando, Masaki, Sugiyama, Akira, Kondo, Kiminori, Matsui, Ryutaro, Kishimoto, Yasuaki, Morishima, Kunihiro, Watanabe, Yukinobu, Scullion, Clare, Smyth, Ashley G., Alejo, Aaron, Doria, Domenico, Kar, Satyabrata, Borghesi, Marco, Oda, Keiji, Yamauchi, Tomoya, and Fukuda, Yuji

Published
2015
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5. High-order alloharmonics produced by nonperiodic drivers

Author

Pirozhkova, M. S., Ogura, K., Sagisaka, A., Esirkepov, T. Zh., Faenov, A. Ya., Pikuz, T. A., Kotaki, H., Hayashi, Y., Fukuda, Y., Koga, J. K., Bulanov, S. V., Daido, H., Hasegawa, N., Ishino, M., Nishikino, M., Koike, M., Kawachi, T., Kiriyama, H., Kando, M., Neely, D., and Pirozhkov, A. S.

Subjects
Classical Physics (physics.class-ph), FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Physics - Classical Physics, General Relativity and Quantum Cosmology, Optics (physics.optics), Physics - Optics
Abstract

High-order harmonics are ubiquitous in nature and present in electromagnetic, acoustic, and gravitational waves. They are generated by periodic nonlinear processes or periodic high-frequency pulses. However, this periodicity is often inexact, such as that in chirped (frequency-swept) optical waveforms or interactions with nonstationary matter -- for instance, reflection from accelerating mirrors. Spectra observed in such cases contain complicated sets of harmonic-like fringes. We encountered such fringes in our experiment on coherent extreme ultraviolet generation via BISER, and could not interpret them using currently available knowledge. Here, we present a comprehensive theory based on interference of harmonics with different orders fully explaining the formation of these fringes, which we call alloharmonics. Like atomic spectra, the complex alloharmonic spectra depend on several integer numbers and bear a unique imprint of the emission process, which the theory can decipher, avoiding confusion or misinterpretation. We also demonstrate the alloharmonics in simulations of gravitational waves emitted by binary black hole mergers. Further, we predict the presence of alloharmonics in the radio spectra of pulsars and in optical frequency combs, and propose their use for measurement of extremely small accelerations necessary for testing gravity theories. The alloharmonics phenomenon generalizes classical harmonics and is critical in research fields such as laser mode locking, frequency comb generation, attosecond pulse generation, pulsar studies, and future gravitational wave spectroscopy., 29 pages, 9 figures, 3 tables

Published
2023

6. The effect of laser contrast on generation of highly charged Fe ions by ultra-intense femtosecond laser pulses

Author

Faenov, Anatoly Ya., Alkhimova, Maria A., Pikuz, Tatiana A., Skobelev, Igor Yu., Nishiuchi, Mamiko, Sakaki, Hironao, Pirozhkov, Alexander S., Sagisaka, Akito, Dover, Nicholas P., Kondo, Kotaro, Ogura, Koichi, Fukuda, Yuji, Kiriyama, Hiromitsu, Andreev, Alexander, Nishitani, Keita, Miyahara, Takumi, Watanabe, Yukinobu, Pikuz, Jr., Sergey A., Kando, Masaki, Kodama, Ruosuke, and Kondo, Kiminori

Published
2017
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8. Dynamics of laser-driven heavy-ion acceleration clarified by ion charge states

Author

M. Nishiuchi, N. P. Dover, M. Hata, H. Sakaki, Ko. Kondo, H. F. Lowe, T. Miyahara, H. Kiriyama, J. K. Koga, N. Iwata, M. A. Alkhimova, A. S. Pirozhkov, A. Ya. Faenov, T. A. Pikuz, A. Sagisaka, Y. Watanabe, M. Kando, K. Kondo, E. J. Ditter, O. C. Ettlinger, G. S. Hicks, Z. Najmudin, T. Ziegler, K. Zeil, U. Schramm, and Y. Sentoku

Subjects
Physics, QC1-999
Abstract

Motivated by the development of next-generation heavy-ion sources, we have investigated the ionization and acceleration dynamics of an ultraintense laser-driven high-Z silver target, experimentally, numerically, and analytically. Using a novel ion measurement technique allowing us to uniquely identify silver ions, we experimentally demonstrate generation of highly charged silver ions (Z^{*}=45_{−2}^{+2}) with energies of >20 MeV/nucleon (>2.2 GeV) from submicron silver targets driven by a laser with intensity 5×10^{21}W/cm^{2}, with increasing ion energy and charge state for decreasing target thickness. We show that although target pre-expansion by the unavoidable rising edge of state-of-the-art high-power lasers can limit proton energies, it is advantageous for heavy-ion acceleration. Two-dimensional particle-in-cell simulations show that the Joule heating in the target bulk results in a high temperature (∼10keV) solid density plasma, leading to the generation of high flux highly charged ions (Z^{*}=40_{−2}^{+2}, ≳10MeV/nucleon) via electron collisional ionization, which are extracted and accelerated with a small divergence by an extreme sheath field at the target rear. However, with reduced target thickness this favorable acceleration is degraded due to the target deformation via laser hole boring, which accompanies higher energy ions with higher charge states but in an uncontrollable manner. Our elucidation of the fundamental processes of high-intensity laser-driven ionization and ion acceleration provides a path for improving the control and parameters of laser-driven heavy-ion sources, a key component for next-generation heavy-ion accelerators.

Published
2020
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9. Surface nanodeformations caused by ultrashort laser pulse

Author

Inogamov, N.A., Zhakhovsky, V.V., Ashitkov, S.I., Emirov, Yu.N., Faenov, A.Ya., Petrov, Yu.V., Khokhlov, V.A., Ishino, M., Demaske, B.J., Tanaka, M., Hasegawa, N., Nishikino, M., Tamotsu, S., Pikuz, T.A., Skobelev, I.Y., Ohba, T., Kaihori, T., Ochi, Y., Imazono, T., Fukuda, Y., Kando, M., Kato, Y., Kawachi, T., Anisimov, S.I., Agranat, M.B., Oleynik, I.I., and Fortov, V.E.

Published
2015
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10. Laboratory formation of a scaled protostellar jet by coaligned poloidal magnetic field

Author

Albertazzi, B., Ciardi, A., Nakatsutsumi, M., Vinci, T., Béard, J., Bonito, R., Billette, J., Borghesi, M., Burkley, Z., Chen, S. N., Cowan, T. E., Herrmannsdörfer, T., Higginson, D. P., Kroll, F., Pikuz, S. A., Naughton, K., Romagnani, L., Riconda, C., Revet, G., Riquier, R., Schlenvoigt, H.-P., Skobelev, I. Yu., Faenov, A.Ya., Soloviev, A., Huarte-Espinosa, M., Frank, A., Portugall, O., Pépin, H., and Fuchs, J.

Published
2014

12. Formation of a plasma with the determining role of radiative processes in thin foils irradiated by a pulse of the PEARL subpetawatt laser

Author

Pikuz, S. A., Skobelev, I. Yu., Alkhimova, M. A., Pokrovskii, G. V., Colgan, J., Pikuz, T. A., Faenov, A. Ya., Soloviev, A. A., Burdonov, K. F., Eremeev, A. A., Sladko, A. D., Osmanov, R. R., Starodubtsev, M. V., Ginzburg, V. N., Kuz’min, A. A., Sergeev, A. M., Fuchs, J., Khazanov, E. A., Shaikin, A. A., Shaikin, I. A., and Yakovlev, I. V.

Published
2017
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13. 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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28. Hydrodynamic instabilities in a highly radiative environment

Author

G. Rigon, B. Albertazzi, P. Mabey, Th. Michel, P. Barroso, A. Faenov, R. Kumar, C. Michaut, T. Pikuz, Y. Sakawa, T. Sano, H. Shimogawara, S. Tamatani, A. Casner, M. Koenig, Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Nagoya University, Freie Universität Berlin, Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), Osaka University [Osaka], Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Centre d'études scientifiques et techniques d'Aquitaine (CESTA), Direction des Applications Militaires (DAM), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
Shock waves, Radiography, 500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], Fluid instabilities, Lasers, Radiative gas dynamics, Flow instabilities, Astrophysics, Condensed Matter Physics, Optical imaging
Abstract

International audience; In this paper, we present the effects of a radiative shock (RS) on the morphology of jet-like objects subjected to hydrodynamic instabilities. To this end, we used an experimental platform developed to create RSs on high energy laser facilities such as LULI2000 and GEKKO XII. Here, we employed modulated targets to initiate Richtmyer–Meshkov and Rayleigh–Taylor instability (RTI) growth in the presence of an RS. The RS is obtained by generating a strong shock in a dense pusher that expands into a low-density xenon gas. With our design, only a limited RTI growth occurs in the absence of radiative effects. A strongly radiative shock has opposite effects on RTI growth. While its deceleration enhances the instability growth, the produced radiations tend to stabilize the interfaces. Our indirect experimental observations suggest a lower instability growth despite the interface deceleration. In addition, the jets, produced during the experiment, are relevant to astrophysical structures such as Herbig–Haro objects or other radiatively cooling jets.

Published
2022
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32. Laser Requirements for High-Order Harmonic Generation by Relativistic Plasma Singularities

Author

Alexander S. Pirozhkov, Timur Zh. Esirkepov, Tatiana A. Pikuz, Anatoly Ya. Faenov, Akito Sagisaka, Koichi Ogura, Yukio Hayashi, Hideyuki Kotaki, Eugene N. Ragozin, David Neely, James K. Koga, Yuji Fukuda, Masaharu Nishikino, Takashi Imazono, Noboru Hasegawa, Tetsuya Kawachi, Hiroyuki Daido, Yoshiaki Kato, Sergei V. Bulanov, Kiminori Kondo, Hiromitsu Kiriyama, and Masaki Kando

Subjects
high-power femtosecond lasers, high-power laser quality, relativistic laser plasma, relativistic plasma singularities, coherent X-ray generation, burst intensification by singularity-emitting radiation, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

We discuss requirements on relativistic-irradiance (I0 > 1018 W/cm2) high-power (multi-terawatt) ultrashort (femtosecond) lasers for efficient generation of high-order harmonics in gas jet targets in a new regime discovered recently (Pirozhkov et al., 2012). Here, we present the results of several experimental campaigns performed with different irradiances, analyse the obtained results and derive the required laser parameters. In particular, we found that the root mean square (RMS) wavefront error should be smaller than ~100 nm (~λ/8). Further, the angular dispersion should be kept considerably smaller than the diffraction divergence, i.e., μrad level for 100–300-mm beam diameters. The corresponding angular chirp should not exceed 10−2 μrad/nm for a 40-nm bandwidth. We show the status of the J-KAREN-P laser (Kiriyama et al., 2015; Pirozhkov et al., 2017) and report on the progress towards satisfying these requirements.

Published
2018
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42. Spallative ablation of dielectrics by X-ray laser

Author

Inogamov, N. A., Zhakhovsky, V. V., Faenov, A. Y., Khokhlov, V. A., Shepelev, V. V., Skobelev, I. Y., Kato, Y., Tanaka, M., Pikuz, T. A., Kishimoto, M., Ishino, M., Nishikino, M., Fukuda, Y., Bulanov, S. V., Kawachi, T., Petrov, Y. V., Anisimov, S. I., and Fortov, V. E.

Published
2010
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44. LAB ASTROPHYSICS: Laboratory formation of a scaled protostellar jet by coaligned poloidal magnetic field

Author

Albertazzi, B., Ciardi, A., Nakatsutsumi, M., Vinci, T., Béard, J., Bonito, R., Billette, J., Borghesi, M., Burkley, Z., Chen, S. N., Cowan, T. E., Herrmannsdörfer, T., Higginson, D. P., Kroll, F., Pikuz, S. A., Naughton, K., Romagnani, L., Riconda, C., Revet, G., Riquier, R., Schlenvoigt, H.-P., Skobelev, I. Yu., Faenov, A. Ya., Soloviev, A., Huarte-Espinosa, M., Frank, A., Portugall, O., Pépin, H., and Fuchs, J.

Published
2014
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45. Experimental studies of the high and low frequency electromagnetic radiation produced from nonlinear laser-plasma interactions

Author

Kando, M., Pirozhkov, A. S., Fukuda, Y., Esirkepov, T. Zh., Daito, I., Kawase, K., Ma, J. L., Chen, L. M., Hayashi, Y., Mori, M., Ogura, K., Kotaki, H., Sagisaka, A., Ragozin, E. N., Faenov, A., Pikuz, T., Kiriyama, H., Okada, H., Kameshima, T., Koga, J. K., Belyaev, K., Kamenets, F. F., Sugiyama, A., Kawachi, T., Daido, H., Kimura, T., Kato, Y., Tajima, T., and Bulanov, S. V.

Published
2009
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46. Ionography of nanostructures with the use of a laser plasma of cluster targets

Author

Faenov, A. Ya., Pikuz, T. A., Fukuda, Y., Kando, M., Kotaki, H., Homma, T., Kawase, K., Kameshima, T., Pirozhkov, A., Yogo, A., Tampo, M., Mori, M., Sakaki, H., Hayashi, I., Nakamura, T., Pikuz, Jr., S. A., Kartashev, V., Skobelev, I. Yu., Giulietti, A., Checchetti, C. A., Boldarev, A. S., Gasilov, V. A., Magunov, A. I., Kar, S., Borghesi, M., Bolton, P., Daido, H., Tajima, T., Kato, I., and Bulanov, S. V.

Published
2009
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47. Propagation-based phase-contrast enhancement of nanostructure images using a debris-free femtosecond-laser-driven cluster-based plasma soft x-ray source and an LiF crystal detector

Author

Pikuz, Tatiana A., Faenov, Anatoly Ya., Gasilov, Sergei V., Skobelev, Igor Yu., Fukuda, Yuji, Kando, Masaki, Kotaki, Hideyuki, Homma, Takayuki, Kawase, Keigo, Hayashi, Yukio, Kawachi, Tetsuya, Daido, Hiroyuki, Kato, Yoshiaki, and Bulanov, Sergei V.

Subjects
Nanotechnology -- Usage, Nanotechnology -- Methods, Optical detectors -- Usage, Optics -- Research, Astronomy, Physics
Abstract

We demonstrate in-line phase-contrast imaging of nanothickness foils by using a relatively large, polychromatic, debris-free femtosecond-laser-driven cluster-based plasma soft x-ray source, and a high-resolution, large dynamic range LiF crystal detector. The spatial coherence length of radiation in our setup reached a value of 5 [micro]m on the sample plane, which is enough to observe phase-contrast enhancement in the images registered by the detector placed only a few hundred micrometers behind the object. We have developed a tabletop soft x-ray emission source, which emits radiation within a 4[pi] sr solid angle, and which allows one to obtain contact and propagation-based phase-contrast imaging ofnanostructures with 700 nm spatial resolutions. This advance could be of utility for metrology applications. OCIS codes: 110.7440, 180.0180, 230.6080, 260.6048.

Published
2009

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