RNDr. Jan Šaroun, CSc.

RNDr. Jan Šaroun, CSc.


1989-1993 Ph.D. student, Nuclear Physics Institute, ASCR, Řež.
Thesis “Utilization of neutron diffraction optics in high-resolution small-angle scattering measurements” (in czech).
1993 CSc. (eq. Ph.D.) Nuclear Physics Institute, ASCR
1982-1987 graduate student, Solid State Physics, Faculty of Mathematics and Physics, Charles University, Prague.
1987 RNDr. (eq. M.S.) Faculty of Mathematics and Physics, Charles University, Prague

Professional experience

1994-now research scientist, Neutron Physics Department of the Nuclear Physics Institute, ASCR, Řež
1995-1996 research associate, Institut Laue-Langevin, Grenoble

Major scientific interests

  • neutron diffraction optics, Monte Carlo simulation of resolution functions and optimization of neutron diffraction experiments (residual stress measurements, small-angle scattering, inelastic scattering on three-axis spectrometers)
  • development of computer programs for interpretation of small-angle neutron scattering data
  • applications of small-angle neutron scattering in material research

Research fellowships and study visits

  • Institute Laue-Langevin, Grenoble (1994, 1997-2006)
  • Laboratoir
  • Leon Brillouin, Saclay (1997)
  • Kyoto Research Reactor Institute, Kumatori (1997)
  • Physicalisch-Technische Bundesanstalt, Braunschweig (1994, 1995)

More than 60 papers in peer-reviewed journals and conference proceedings.

Web search: Google scholar.


Journal papers
Research reports
Books and conference proceedings

Journal papers:

  • R. Michalec, J. Šaroun, Time modulation of small-angle neutron scattering in the longitudinally vibrating double-crystal system, J. Appl. Cryst., 23, 1990, 70-71.
  • P. Lukáš P. Mikula, J. Kulda, J. Šaroun, P. Strunz, New SANS Diffractometer and Neutron Interferometric Device at NPI Řež, Physica B , 180&181, 1992, 984- 986.
  • J. Šaroun, P. Lukáš, P. Mikula, P. Strunz, Focusing Double Bent Crystal Diffractometer in combination with PSD for SANS experiments, Journal de Physique IV, C8, 1993, 439-442.
  • P. Strunz, P. Lukáš, J. Šaroun, P. Mikula, G. Albertini, G. Cicognani, M. Stefanon, Investigation of Vycor Glass Structure on the Double-bent-crystal Small-angle Neutron Scattering Instrument, Journal de Physique IV, C7, 1993, 1439-1442.
  • P. Lukáš, P. Mikula, J. Šaroun, P. Strunz, Double Bent Crystal Diffractometer for SANS Experiments, Nucl. Inst. Meth. A, 338, 1994, 111-115.
  • P. Strunz, P. Lukáš, P. Mikula, J. Šaroun, E. Keilová, J. Kočík, Double-bent-crystal SANS investigation of the creep exposed CMSX2 single crystal, Acta Physica Hungarica, 75, 1994, 279-284.
  • M. Vrána, P. Mikula, P. Lukáš, J. Šaroun, P. Strunz, High resolution neutron diffraction techniques for strain/stress measurements at a steady state reactor, Acta Physica Hungarica, 75, 1994, 305-310.
  • P. Strunz, P. Lukáš, P. Mikula, J. Šaroun, G. Albertini, F. Rustichelli, G. Cicognani, A. di Gianfrancesc, Characterization of the Creep Exposed CMSX2 Single Crystal by Neutron Diffraction Topography and Neutron Diffractometry, Czech.J.Phys. , 44, 1994, 687-693.
  • J. Šaroun, P. Lukáš, P. Mikula, B. Alefeld., Optimization of Double Bent Crystal Diffractometer for Neutron Small-Angle Scattering Experiments, J.Appl.Cryst., 27, 1994, 80- 88.
  • J. Kulda, V. Wagner, P. Mikula, J. Šaroun, Comparative Tests of Neutron Monochromators Using Elastically Bent Silicon and Mosaic Crystals, Nucl. Inst. Meth. A, 338, 1994, 60-64.
  • P. Mikula, M. Vrána, P. Lukáš, J. Šaroun, P. Strunz, V. Wagner, B. Alefeld, Bragg optics for strain/stress measurement techniques, Physica B, 213&214, 1995, 845-847.
  • P. Mikula, P. Lukáš, J. Šaroun, V. Wagner, J. Kulda, Cylindrically bent perfect crystals as neutron monochromators, Physica B, 213&214, 1995, 922- 925.
  • P. Lukáš, Z. Kouřil, P. Mikula, J. Šaroun, P. Strunz, M. Vrána, V. Wagner, Bent Crystal Analyzer in Fully Asymmetric Diffraction Geometry for Neutron Scattering Instrumentation, J.Phys.Soc.Jpn. , 65, 1996 (A), 241-244.
  • P. Mikula, M. Vrána, P. Lukáš, J. Šaroun, V., Wagner, High-Resolution Neutron Powder Diffractometry on Samples of Small Dimensions, Materials Science Forum ,228-231. 1996, 269-274.
  • J. Kulda, J. Šaroun, Elastically bent silicon monochromator and analyzer on a TAS instrument, Nucl. Instr. Meth. A, 379, 1996, 155-166.
  • P. Strunz, J. Šaroun, P. Mikula, P. Lukáš, F. Eichhorn, Double-bent-crystal SANS setting and its applications, J. Appl. Cryst. , 30, 1997, 844-848.
  • J. Šaroun, F. Eichhorn, A. Hempel, P. Lukáš, B. Kolman, K. Neufuss, P. Mikula, P., Strunz, SANS investigation of plasma sprayed materials using a double-crystal diffractometter, Physica B, 234-236, 1997, 1011- 1013.
  • J. Šaroun, J. Kulda, RESTRAX - a program for TAS resolution calculation and for scan profile simulation, Physica B, 234-236, 1997, 1102-1104.
  • J. Šaroun, J. Kulda, Monte Carlo simulations of Resolution Functions and Scan Profiles for Neutron Three-Axis Spectrometers, Journal of Neutron Research, Vol. 6, 1997, 125-133.
  • P. Mikula, P. Lukáš, P. Strunz, J. Šaroun, M. Vrána et al., Neutron Scattering Experiments of Materials Science at Řež's Reactor, Physica B 241-243 (1998) 92-94.
  • F. Carsughi, R. May, R. Plenteda, J. Šaroun, Sample geometry effects on incoherent small-angle scattering of light water, J. Appl. Cryst. 33 (2000) 112-117.
  • R. Gilles, G. Artus, J. Šaroun, H. Boysen, H. Fuess et al., The New Structure Powder Diffractometer at the FRM II in Garching, Physica B 276-278 (2000) 87-88.
  • A. Hiess, R. Currat, J. Šaroun, F.J. Bermejo, ILL's renewed thermal three-axis spectrometer, Physica B 276-278 (2000) 91-92.
  • J. Kulda, P. Mikula, J. Šaroun, Elastically Bent Perfect Crystal Analyzer., Physica B 276-278 (2000) 73-74.
  • M. Ono, P. Mikula, S. Harjo, J. Šaroun, K. Yoneda et al., Focusing Bent Perfect-Crystal Neutron Monochromator - A Key to High-Resolution Stress/Strain Measurement Studies of Polycrystalline Materials, Mater. Sci. Forum 321-324 (2000) 296-301.
  • P. Strunz, J. Šaroun, U. Keiderling, A. Wiedenmann, R. Przenioslo, et al., General formula for determination of cross-section from measured SANS intensities, J. Appl. Cryst. 33 (2000) 829-833.
  • J. Šaroun, P. Strunz, S. Borbély, J. Ilavský, B.J. Kolman et al., Evaluation of High-Resolution SANS Measurements in Multiple Scattering Regime, Mater. Sci. Forum 321-324 (2000) 270-275.
  • J. Šaroun, Evaluation of Double-Crystal SANS Data Influenced by Multiple Scattering, J. Appl. Cryst. 33 (2000) 824-828.
  • J. Šaroun, J. Kulda, A. Wildes, A. Hiess, Monte Carlo Simulation of Neutron Fluxes on an Absolute Scale - Comparison to Experiments, Physica B 276-278 (2000) 148-149.
  • A. Wildes, J. Šaroun, E. Farhi, I. Anderson, P. Hoghoj, A. Brochier, A comparison of Monte-Carlo simulations using RESTRAX and McSTAS with experiment on IN14, Physica B 276-278 (2000) 177-178.
  • R. Gilles, B. Krimmer, J. Šaroun, H. Boysen, H. Fuess, "The concept of the new structure powder diffractometer (SPODI) at the FRM-II in Garching" Mater. Sci. Forum 378-3 (2001) 282-287.
  • P. Mikula, P. Lukáš, J. Šaroun, M. Vrána, V. Wagner, "Some Novel Difraction Optics Components for Neutron Scattering Steady State Neutron Sources" J. Phys. Soc. Jpn. 70 (2001) 477-479.
  • S. Harjo, N. Kojima, Y. Motohashi, J. Šaroun, V. Ryukhtin, P. Strunz, R. Loidl, M. Baron, "Characterization of Cavities in Superplastically Deformed Tetragonal Zirconia Polycrystals by Means of Small Angle Neutron Scattering" Materials Transactions 43 (2002) 2480-2486.
  • J. Kulda, J. Šaroun, P. Courtois, M. Thomas, P. Flores, "IN20 - The ILL high-flux polarised-neutron three-axis spectrometer" Applied Physics A Suppl 74 (2002) s246-s248.
  • V. Ryukhtin, J. Šaroun, "Direct comparison of SANS data with SEM image analysis" Applied Physics A Suppl 74 (2002) s1158-s1160.
  • P. A. Seeger, L.L. Daemen, E. Farhi, E.-T. Lee, L. Wang, L. Passel, J. Šaroun, G. Zsigmond, "Monte Carlo Code Comparisons for a Model Instrument" Neutron News 13 (2002) 24-29.
  • J. Šaroun, T. Pirling, R.B. Rogge, "Optimization of focusing monochromator for neutron strain-scanning diffractometer" Applied Physics A Suppl 74 (2002) s1489-s1491.
  • J. Šaroun, J. Kulda, "Monte Carlo Ray-Tracing Code for RESTRAX" Neutron News 13 (2002) 15-19.
  • A. Wildes, J. Šaroun, E. Farhi, I. Anderson, P. Hoghoj, A Brochier, "A comparison of Monte-Carlo simulation programs with experiment: the effect of a focusing guide on resolution" Applied Physics A Suppl 74 (2002) s1452-s1454.
  • V. Ryukhtin, J. Šaroun, S. Harjo, Y. Motohoashi, M. Baron, R. Loidl, "Comparative study of porosity in 3Y-TZP superplastic ceramics by USANS and SEM image analysis" J. Appl. Cryst. 36 (2003) 478-483.
  • S. Harjo, Y. Motohashi, J. Šaroun, V. Ryukhtin, P. Strunz, M. Baron, R. Loidl, "Cavitation Behaviours in a Tetragonal Zirconia Polycrystal Subjected to Superplastic Deformations Measured by SANS Method" Mater. Sci. Forum 447-448 (2004) 67-72.
  • S. Harjo, J. Šaroun, Y. Motohashi, N. Kojima, V. Ryukhtin, P. Strunz (NPI), M. Baron, R. Loidl, "Flat cavities formed in TZP caused by superplastic deformations at high strain-rates and their effect on elongation",Materials Transaction 45 (2004), 824-832.
  • V. Ryukhtin, J. Šaroun, S. Harjo, Y. Motohashi, A. Wiedenmann, P. Strunz, "SANS investigations of pore anisotropy in superplastically deformed ceramics",Physica B 350 (2004), e1019-e1020.
  • J. Šaroun, "Random-walk algorithm for the simulation of neutron diffraction in deformed mosaic crystals",Nucl. Instr. and Meth. A 529 (2004), 162-165.
  • J. Šaroun, J. Kočík, P. Strunz, "Investigation of radiation damage in VVER-440 reactor vessel steels by SANS",Physica B 350 (2004), e755-e756.
  • P. Lukáš, M. Vrána, J. Šaroun, V. Ryukhtin, J. Vleugels, G. Anné, O. Van der Biest, M. Gasik, "Neutron Diffraction Studies of Functionally Graded Alumina-Zirconia Ceramics",Mater. Sci. Forum 492-493 (2005), 201-206.
  • M. Rogante, J. Šaroun, P. Strunz, G. F. Ceschini, V. Ryukhtin, P. Lukáš, V. Marinčák, "Nanoscale investigation by SANS of inconel 738 turbine blades after high-temperature operation",Metallic Materials 43 (2005), 371-381.
  • M. Kempa, B. Janoušová, J. Šaroun, P. Flores, M. Boehm, F. Demmel, J. Kulda, "The FlatCone multianalyzer setup for ILL's three-axis spectrometers",Physica B 385-386 (2006), 1080-1082.
  • J. Šaroun, J. Kulda, "MC ray-tracing optimization of lobster-eye focusing devices with RESTRAX",Physica B 385-386 (2006), 1250-1252.
  • J. Šaroun, J. Kočík, E. Garcia-Matres, O. Muránsky, P. Strunz, "Characterisation of radiation-induced precipitates in reactor pressure vessel steels",Zeitschrift fur Kristallographie 23 (2006), 393-398.
  • J. Šaroun, "Evaluation of multiple small-angle neutron scattering including magnetic interactions",J. Appl. Cryst. 40 (2007) 701-705.
  • P. Strunz, J. Šaroun, P. Lukáš, P. Mikula, J. Zrník, "New High-Temperature Furnace for SANS Measurements at DN-2 Double-Bent-Crystal Diffractometer in NPI Řež Near Prague", Newsletter of the IUCr 34 (2007) 25-27.
  • R. Wimpory, P. Mikula, J. Šaroun, T. Poeste, J. Li, M. Hofmann, R. Schneider, "Efficiency Boost of the Materials Science Diffractometer E3 at BENSC: One Order of Magnitude Due to a Horizontally and Vertically Focusing Monochromator", Neutron News 19 (2008) 16-19.
  • M. Boehm, A. Hiess, J. Kulda, S. Roux, J. Šaroun, "ThALES - Three axis low energy spectroscopy at the Institut Laue - Langevin", Meas. Sci. Technol. 19 (2008) 34024.
  • H. Schoeber, et al., "Tailored instrumentation for long-pulse neutron spallation sources", Nucl. Instr. and Meth. A 589 (2008) 34-46.
  • B. Ballokova, J. Šaroun, M. Besterci, P. Hvizdoš, "Microstructure evaluation of MoSi2 based composite materials by SANS investigations", Metallic Materials 47 (2009) 375-380.
  • Y. Motohashi, V. Ryukhtin, T. Sakuma, J. Šaroun, "Influence of Flat Cavity Formation on Stress vs. Strain and Strain-Rate Relations of Superplastic Deformation in 3Y-TZP", Materials Transaction 51 (2010) 567-573.
  • B.-S. Seong, V. Em, P. Mikula, J. Šaroun, M.-H. Kang, "Optimization of a bent perfect Si(111) monochromator at a small take-off angle for use in a stress instrument", J. Appl. Cryst. 43 (2010) 654-658.

Research reports

  • P. Lukáš, P. Mikula, J. Šaroun, V. Wagner, Neutronenoptik fuer Materialuntersuchungen: Mikro- und Makrospannungen, PTB Braunschweig Jahresbericht 1995,1996, 265.
  • J. Šaroun, RESTRAX, ILL Technical Report 96SA08T, 1996.
  • P. Mikula, J. Kulda, P. Lukáš, P. Strunz, J. Šaroun, M. Vrána, V. Wagner, Some practical Applications of Bent Perfect Crystals (BPC) in Neutron Diffractions Experiments, PTB Braunschweig report N29, 1997.
  • J. Šaroun, P. Strunz, J. Ilavsky, B. Kolman, "Investigation of Porosity in Thermally Treated Alumina by High-Resolution Small-Angle-Scattering"" Biennial Report 1997-1998 NPI Řež (1999) 36-37.

Books and Conference Proceedings

  • P. Mikula, J. Kulda, P. Lukáš, M. Vrána, J. Šaroun, P. Strunz, B. Alefeld, V. Wagner, R. Scherm, Neutron Focusing Optics in Applied Crystalography, Proceedings of the XV Conference on Applied Crystalography, 1992, 17- 21.
  • P. Mikula, P. Lukáš, J. Kulda, P.Strunz, J. Šaroun, V. Wagner, R. Scherm, B. Alefeld, R. Reinartz. Unconventional double-bent-crystal (DBC) diffractometer equipped by position sensitive detector (PSD), SPIE Proceedings Vol. 1738, Neutron-Optical Devices and applications, San Diego, 1992. pp.441-451.
  • P. Lukáš, P. Mikula, J. Šaroun, P. Strunz, M. Vrána, Instrumentation for SANS and Strain Measurements Using Cylindrically Bent Perfect Crystals, Proceedings of Meeting on an Advaced Neutron Spallation Source - AUSTRON, 1993, 59-72.
  • P. Strunz, P. Lukáš, J. Šaroun, P. Mikula, Dvojkrystalový difraktometr vybavený elasticky deformovanými krystaly pro měření maloúhlového rozptylu neutronů (SANS), Sborník příspěvků kolokvia Krystalografické, společnosti Experimentální techniky v rentgenové, a neutronové, strukturní analýze, 1994, 244-247.
  • M. Vrána, P. Klimanek, P. Lukáš, P. Mikula, J. Šaroun, V. Wagner, Neutron Optics for Micro- and macrostrains investigations,  Proceedings of International Conference  EUROMAT 95 , Venice/Padua, Italy, September 25-28, 1995, Symposia D,E.", 1995, 35-40.
  • P. Mikula, P. Lukáš, J. Šaroun, P. Strunz, M. Vrána, V. Wagner, Neutron Diffractometer Using Bragg Diffraction Optics for High Resolution Strain/Stress Measurements, Proceedings of the Int. Conf. Neutrons in Research and Industry, 1997, 156-159.
  • M. Ono, P. Mikula, S. Harjo, J. Šaroun, K. Yoneda, J. Sawano, New focusing Si-single crystal neutron monochromator for strain/stress measurement, Proc. of  the 32th Annual Meeting on the Scientific Research, Kyoto University Research Reactor Institute, 1998, 121-126.
  • J. Šaroun, High-Resolution SANS Experiments by Double-Crystal Technique, Proceedings of the International School and Symposium on Small-Angle Scattering, Matrahaza, Hungary (1999), Report KFKI-1999-02/E, 52-54.
  • S. Harjo, Y. Motohashi, N. Kojima, J. Šaroun, V. Ryukhtin, P. Strunz, P. Lukáš, "Morphology of cavities measured by neutron scattering in Superplastically deformed 3Y-TZP" Proceedings of The fourth Pacific Rim International Conference on Advanced Materials and pocessing (PRICM4) (2001) 2057-2060.
  • J. Kulda, P. Courtois, P. Flores, J. Šaroun, M. Thomas, M. Enderle, A. Monteith, "IN20 - the high flux polarised neutron TAS" SPIE proceedings 4509 (2002) 13-20.
  • V. Marinčák, P. Strunz, J. Šaroun, V. Ryukhtin, P. Lukáš, L. Cassi, G.F. Ceschini, M. Rogante, "Non-destructive SANS investigation of IN 738 turbine blades after high-temperature operation" Proc. of ICM'9, May 25-29, 2003, Geneve, Switzerland CD (2003) - .
  • J. Šaroun, J. Kulda, "RESTRAX: modelling the three-axis spectrometer resolution" Proc. of SCNS, December 12-14, 2003, Grenoble, France CD (2003) - .
  • J. Šaroun, J. Kulda, "Neutron ray-tracing simulations and data analysis with RESTRAX",SPIE proceedings 5536 (2004), 124-133.
  • J. Šaroun, J. Kulda, "Raytrace of Neutron Optical Systems with RESTRAX", in Modern Developments in X-Ray and Neutron Optics, eds. A. Erko, M. Idir, T. Krist, A.G. Michette, Springer Berlin 2008, p. 57-68.


  • J. Šaroun, Utilization of Neutron Diffraction Optics in High-Resolution Small-Angle Neutron Measurements (in czech) , PhD. thesis, Nuclear Physics Institute, ASCR, Řež, 1993.