Prof. Evgeny N. Ragozin Profile

Prof. Evgeny N. Ragozin

Leading Researcher at PN Lebedev Physical Institute

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Publications (20)

Proceedings Article | 24 May 2018 Paper

Broadband Sb/B4C multilayer mirrors for XUV spectroscopy applications

Eugene Vishnyakov, Igor Kopylets, Valeriy Kondratenko, Alexey Kolesnikov, Alexey Shatokhin, Evgeny Ragozin

Proceedings Volume 10677, 106772L (2018) https://doi.org/10.1117/12.2305926

KEYWORDS: Antimony, Extreme ultraviolet, Multilayers, Reflectivity, Mirrors, Charge-coupled devices, Spectroscopy, Spectrographs, Diffraction, Silicon

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Proceedings Article | 24 May 2018 Presentation + Paper

Imaging VLS grating spectrographs

Eugene Vishnyakov, Alexei Kolesnikov, Alexey Shatokhin, Evgeny Ragozin

Proceedings Volume 10677, 106770E (2018) https://doi.org/10.1117/12.2305918

KEYWORDS: Spectrographs, Diffraction gratings, Extreme ultraviolet, Spectral resolution, Mirrors, Diffraction, Vacuum ultraviolet, Sensors, Grazing incidence, Plasmas

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Proceedings Article | 31 May 2017 Presentation + Paper

Flat-field VLS spectrometers for laboratory applications

Evgeny Ragozin, Aleksei Belokopytov, Aleksei Kolesnikov, Eduard Muslimov, Aleksei Shatokhin, Eugene Vishnyakov

Proceedings Volume 10235, 102350L (2017) https://doi.org/10.1117/12.2264992

KEYWORDS: Spectroscopy, Optical design, Imaging spectroscopy, Control systems, Laser induced fluorescence, Plasma, Spectrometers, Extreme ultraviolet, Spatial resolution, Mirrors, Electron beam lithography, Lithography, X-ray optics, X-rays, Sensors, Spectral resolution

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Proceedings Article | 6 October 2011 Paper

Coherent x-ray generation in relativistic laser/gas jet interactions

A. Pirozhkov, M. Kando, T. Zh. Esirkepov, P. Gallegos, H. Ahmed, E. Ragozin, A. Ya. Faenov, T. Pikuz, J. Koga, H. Kiriyama, P. McKenna, M. Borghesi, K. Kondo, H. Daido, Y. Kato, D. Neely, S. Bulanov

Proceedings Volume 8140, 81400A (2011) https://doi.org/10.1117/12.892898

KEYWORDS: Mirrors, Pulsed laser operation, Charge-coupled devices, X-rays, Plasma, Reflectivity, Spectrographs, Extreme ultraviolet, Polarization, Diffraction

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Proceedings Article | 7 May 2009 Paper

XUV and IR electromagnetic radiation from nonlinear laser-plasma interaction

Masaki Kando, Alexander Pirozhkov, Yuji Fukuda, Timur Esirkepov, Izuru Daito, Keigo Kawase, Jinglong Ma, Liming Chen, Yukio Hayashi, Michiaki Mori, Koichi Ogura, Hideyuki Kotaki, Akito Sagisaka, Evgeny Ragozin, Anatoly Faenov, Tatiana Pikuz, Hiromitsu Kiriyama, Hajime Okada, Takashi Kameshima, James Koga, Tetsuya Kawachi, Hiroyuki Daido, Toyoaki Kimura, Yoshiaki Kato, Toshiki Tajima, Sergei Bulanov

Proceedings Volume 7359, 73590K (2009) https://doi.org/10.1117/12.820463

KEYWORDS: Mirrors, Plasmas, Pulsed laser operation, Extreme ultraviolet, Signal detection, Polarization, Infrared radiation, Electromagnetic radiation, Solitons, Charge-coupled devices

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Proceedings Article | 30 April 2009 Paper

Spectroscopic characterization of novel multilayer mirrors intended for astronomical and laboratory applications

Eugene Ragozin, Konstantin Mednikov, Andrei Pertsov, Alexander Pirozhkov, Anton Reva, Sergei Shestov, Artem Ul'yanov, Eugene Vishnyakov

Proceedings Volume 7360, 73600N (2009) https://doi.org/10.1117/12.820750

KEYWORDS: Mirrors, Reflectivity, Spectroscopy, Imaging spectroscopy, Multilayers, Plasma, Absorption, Sensors, Aluminum, Ions

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Proceedings Article | 24 December 2002 Paper

Broadband normal-incidence aperiodic multilayer mirrors for soft x-ray dispersive spectroscopy: theory and implementation

Eugene Ragozin, Valerii Kondratenko, Vladimir Levashov, Yurii Pershin, Alexander Pirozhkov

Proceedings Volume 4782, (2002) https://doi.org/10.1117/12.451355

KEYWORDS: Reflectivity, X-rays, Spectrographs, Mirrors, Silicon, Solids, Molybdenum, Diffraction gratings, Diffraction, Spectroscopy

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Proceedings Article | 23 October 2002 Paper

Interaction of a pulsed gas target with Nd-laser radiation and laser-produced plasma

Eugene Ragozin, Vladimir Levashov, Konstantin Mednikov, Alexander Pirozhkov, Pavel Sasorov

Proceedings Volume 4781, (2002) https://doi.org/10.1117/12.450964

KEYWORDS: Xenon, Plasma, X-rays, Ions, Pulsed laser operation, Photography, Mirrors, Multilayers, Spectrographs, Chemical species

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Proceedings Article | 16 August 2000 Paper

XUV spectroscopy of laser-plasma interactions employing multilayer mirrors

Nikolai Kolachevsky, Alexandr Pirozhkov, Eugene Ragozin

Proceedings Volume 4065, (2000) https://doi.org/10.1117/12.407336

KEYWORDS: Mirrors, Plasma, Reflectivity, Spectrographs, Ions, Extreme ultraviolet, Spectroscopy, Diffraction gratings, X-rays, Magnesium

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Proceedings Article | 27 August 1999 Paper

Depth-graded multilayer mirrors for the hard x-ray spectral region: theory and inverse and direct problems

Eric Ziegler, Inna Bukreeva, Igor Kozhevnikov, Alexandr Pirozhkov, Eugene Ragozin

Proceedings Volume 3737, (1999) https://doi.org/10.1117/12.360033

KEYWORDS: Reflectivity, Mirrors, Multilayers, X-rays, Hard x-rays, Inverse problems, Absorption, Interfaces, X-ray telescopes, Dielectrics

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Proceedings Article | 25 June 1998 Paper

Multilayer optics for x-ray and gamma radiation

S. Andreev, Sergey Gaponov, Nikolai Salashchenko, E. Shamov, Leonid Shmaenok, Sergei Bobashev, Dmitrii Simanovski, Eugene Ragozin

Proceedings Volume 3406, (1998) https://doi.org/10.1117/12.310983

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Proceedings Article | 25 June 1998 Paper

Spectroscopic characterization of plane multilayer diffraction gratings using a laser-produced plasma XUV radiation source

Nikolai Kolachevsky, Mikhail Mitropolsky, Eugene Ragozin, S. Bac, Philippe Troussel

Proceedings Volume 3406, (1998) https://doi.org/10.1117/12.310985

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Proceedings Article | 25 June 1998 Paper

Manufacture and testing of x-ray optical elements for the TEREK-C and RES-C instruments on the CORONAS-I mission

Alexander Ignatiev, Nikolai Kolachevsky, Viatcheslav Korneev, Viktor Krutov, Sergey Kuzin, Alexander Mitrofanov, Andrey Pertzov, Eugene Ragozin, Vladimir Slemzin, Igor Tindo, Igor Zhitnik, Nikolai Salashchenko, Roger Thomas

Proceedings Volume 3406, (1998) https://doi.org/10.1117/12.310981

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Proceedings Article | 1 November 1997 Paper

Stigmatic broadband spectroscopic instruments below 300 A

Eugene Ragozin, S. Andreev, Fred Bijkerk, Nikolai Kolachevsky, Eric Louis, Alexandr Pirozhkov, Nikolai Salashchenko

Proceedings Volume 3156, (1997) https://doi.org/10.1117/12.279414

KEYWORDS: Plasmas, Spectrographs, Mirrors, Reflectivity, Reflection, Spectrometers, X-rays, Ions, Spectroscopes, Multilayers

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Along with ultrahigh-resolution narrow-band spectrometers, a demand exists for medium- and high-resolution stigmatic instruments of a survey type, covering a spectral range of more than a hundred angstroms. Here, we describe several stigmatic spectroscopic configurations intended for characterizing various soft x-ray radiation sources (laser- produced plasmas, XUV lasers, etc.) and optical components [multilayer mirrors (MMs), absorption filters, etc.] in a broad spectral range. The combination of a grazing-incidence toroidal mirror and a large-area transmission diffraction grating (TG) made up a broadband spectrograph with a medium dispersion, with a plate scale of 4-to-20 angstrom/mm, which has proven to be inherently suited for characterizing plane MMs and the laser-plasma source itself. Two versions of W- coated toroidal mirrors were used, which operated at grazing angles of 7.6 degrees and 4 degrees and had respective practical short-wave cutoffs at about 40 and 15 angstrom. Line spectra of low-Z targets and quasicontinuous spectra of a tungsten target were obtained with a resolution of about 800. The configuration of a TG spectrograph was used to characterize CoC MMs with a d-spacing of 38 angstroms fabricated on Si(111) substrates by e-beam deposition and Kr⁺ ion beam polishing of metal layers. The absolute reflectivities near 75 angstrom were measured at 10%. The combination of a large-area TG and a concave MM with a strong lateral gradient of the d-spacing made up a stigmatic spectrograph for the 110 - 300 angstrom range. When the gradient was parallel to the TG lines, the TG was placed in the converging beam. When the gradient was orthogonal to the grating lines, the TG dispersed, unlike the configurations used previously, the diverging beam incident on the focusing MM. Removing the entrance slit transforms the spectrograph into a spectroheliograph. The latter configuration is well suited for producing 2-D solar images in the radiation of spectral lines and far-field images of single- and many- frequency x-ray lasers.

Proceedings Article | 11 July 1997 Paper

Spectroscopic characterization of soft x-ray multilayer optics using a broadband laser-plasma radiation source

Eugene Ragozin, Nikolai Kolachevsky, Mikhail Mitropolsky, Yurii Pokrovsky

Proceedings Volume 3113, (1997) https://doi.org/10.1117/12.278852

KEYWORDS: Plasmas, Mirrors, Multilayers, Photography, Spectrographs, X-rays, Reflection, Diffraction gratings, Spectroscopy, X-ray optics

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We present the spectroscopic techniques for studying imaging, spectral, and polarizing properties of multilayer optics intended for solar astronomy and laboratory applications. The measurements were performed using line or quasicontinuous radiation (15 - 400 angstrom) of a point-like source driven by 0.15-J, 5-ns laser pulses at 0.54 micrometer. The imaging quality of focusing normal-incidence multilayer mirrors (MMs) in the subarcsecond resolution range was evaluated from small- source imaging tests employing a high-resolution photographic film. The spectral properties of focusing and plane MMs were measured using the configuration of a transmission grating spectrograph with a medium dispersion, the plate scale typically lying in the range 10 - 30 angstroms/mm. This technique allowed us to measure: (1) the resonance wavelengths versus MM aperture (evaluation of lateral uniformity of the d- spacing); (2) the spectral shape of the primary resonance reflection peak; (3) outside-resonance reflection and higher- order reflection maxima revealed under irradiation by a broad spectrum; (4) for plane MMs, the reflectivities at arbitrary angles of incidence. In the evaluation of plane MMs, the function of focusing radiation was transferred to grazing- incidence toroidal mirrors. About 40 MMs ranging in resonance wavelength from 45 to 310 angstroms, synthesized in different laboratories, were studied using these techniques. A broadband spectrograph comprising a grazing-incidence toroidal mirror and a transmission grating proved to be inherently suited for characterizing the laser-plasma source itself. Two versions of tungsten-coated toroidal mirrors were used, which operated at grazing angles of 7.6 degrees and 4 degrees and had the respective practical short-wave cutoffs at about 40 and 15 angstroms. A source of collimated polarized quasimonochromatic radiation in the 170 to 180 angstrom band was implemented around MMs and our laser-plasma source. The peak polarizance of plane Mo-Si MMs with a d-spacing of 120 angstroms, measured around 175 angstroms at 41 degrees off normal, proved to be 98.2%, which was consistent with the calculated value (98.75%). Two high-resolution high-throughput stigmatic spectrographs were implemented, each comprising a couple of identical concave normal-incidence MMs and a plane grating at grazing incidence. Space-resolved line spectra of laser- produced plasma were obtained and analyzed. The spectrograph for the 130 - 140 angstrom range had a practical resolving power of at least 4000, a plate scale of 0.7 angstroms/mm, and measured 0.6 m. These parameters for the 170 - 190 angstrom range instrument were respectively 24,000, 0.35 angstrom/mm, and 1.1 m. A highly dispersive spectroheliograph was put to a test using a laser-plasma source; the configuration was closely related to that of the spectrograph but involved a reversed ray propagation.

Proceedings Article | 25 September 1995 Paper

Stigmatic high-resolution high-throughput XUV spectroscopic instruments employing unconventional optical components

Eugene Ragozin, Nikolai Kolachevsky, Mikhail Mitropolsky, Yurii Pokrovsky, Anatoli Fedorenko, V. Kondratenko, S. Yulin

Proceedings Volume 2520, (1995) https://doi.org/10.1117/12.221645

KEYWORDS: Plasma, Spectral resolution, Spectroscopy, Mirrors, Extreme ultraviolet, Spatial resolution, Reflection, Multilayers, Solids, Magnesium

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Proceedings Article | 25 September 1995 Paper

Laser plasma source of polarized monochromatic beams in the XUV around multilayer mirrors

Eugene Ragozin, Nikolai Kolachevsky, Mikhail Mitropolsky, Yurii Pokrovsky, Alexander Shevelko, A. Vasil'ev, Yuriy Platonov, Nikolai Salashchenko

Proceedings Volume 2520, (1995) https://doi.org/10.1117/12.221646

KEYWORDS: Mirrors, Plasma, X-rays, Reflectivity, Spectroscopy, Polarizers, Polarization, Extreme ultraviolet, Solids, X-ray optics

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Proceedings Article | 11 November 1994 Paper

Aspherical imaging multilayer mirrors with subarcsecond resolution for solar XUV telescopes

Vladimir Slemzin, Igor Zhitnik, Eugene Ragozin, Eugeny Andreev, Nikolai Salashchenko, Jury Platonov

Proceedings Volume 2279, (1994) https://doi.org/10.1117/12.193140

KEYWORDS: Mirrors, Telescopes, Space telescopes, Extreme ultraviolet, Image resolution, Sensors, Spherical lenses, Monochromatic aberrations, Diffraction, Multilayers

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Proceedings Article | 1 February 1994 Paper

Stigmatic high-resolution high-throughput narrowband diffraction spectrograph employing multilayer mirrors

Eugene Ragozin, Nikolai Kolachevsky, Mikhail Mitropolsky, Anatoli Fedorenko, V. Kondratenko, S. Yulin

Proceedings Volume 2012, (1994) https://doi.org/10.1117/12.167388

KEYWORDS: Mirrors, Reflection, Spectral resolution, Diffraction, Diffraction gratings, Plasma, Spectrographs, Spectroscopes, Plasma spectroscopy, Reflectivity

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Proceedings Article | 1 February 1994 Paper

Characterization of imaging normal-incidence multilayer mirrors for the 40- to 300-A range by spectroscopic techniques using a laser-plasma radiation source

Eugene Ragozin, Nikolai Kolachevsky, Mikhail Mitropolsky, Vladimir Slemzin, Nikolai Salashchenko

Proceedings Volume 2012, (1994) https://doi.org/10.1117/12.167387

KEYWORDS: Spectroscopy, Mirrors, Plasma, Reflection, Imaging spectroscopy, Ions, Extreme ultraviolet, Reflectivity, Spectral resolution, Photography

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Showing 5 of 20 publications

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