Dr. Jaroslav Nejdl Profile

Dr. Jaroslav Nejdl

Leader of a research group at ELI Beamlines

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 9 September 2019 Paper

Progress on laser-driven x-ray sources at ELI Beamlines

Jaroslav Nejdl, Dong-Du Mai, Uddhab Chaulagain, Ondřej Hort, Ondřej Finke, Martin Albrecht, Matej Jurkovič, Roberto Lera, Stefan Karatodorov, Marcel Lamač, Jakub Vančura, Karel Boháček, Shirly Espinoza, Steffen Richter, Mateusz Rebarz, Eva Klimešová, Maria Krikunova, Michaela Kolzová, Roman Antipenkov, František Batysta, Jakub Novák, Jonathan Green, Jakob Andreasson, Georg Korn

Proc. SPIE. 11111, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XIII

KEYWORDS: Electron beams, X-ray sources, Gases, Laser development, High harmonic generation, Plasma generation, Plasma

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Proceedings Article | 14 May 2019 Presentation

Laser-driven secondary sources of X-rays and particles at ELI Beamlines (Conference Presentation)

Georg Korn, Sergei Bulanov, Daniele Margarone, Jaroslav Nejdl, Alexander Molodozhentsev, Tadzio Levato, Bedrich Rus, Pavel Bakule

Proc. SPIE. 11039, Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers IV

KEYWORDS: High power lasers, Particles, X-rays, X-ray sources, Electrons, Laser applications, Laser scattering, Semiconductor lasers, Diodes, Pulsed laser operation

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We will be giving an overview on the development of the “ELI-beamline facility” being currently implemented and opened as a user facility within the Extreme Light Infrastructure (ELI) project based on the European ESFRI (European Strategy Forum on Research Infrastructures) process. ELI-Beamlines is the high-energy, repetition-rate laser pillar of the ELI (Extreme Light Infrastructure) project. The main objective of the ELI-Beamlines facility is the delivery of ultra-intense high-energy pulses for high field experiments and the generation and applications of high-brightness X-ray sources and accelerated particles. The high power laser systems currently prepared and used for the generation of higher repetition rate sources of x-rays and particles are L1 (Allegra) a 1 kHz diode pumped laser produced sub-20fs OPCPA system and the L3 (HAPLS) a 10 Hz, 1 PW (30fs) laser using as the active medium Ti:sapphire with new gas cooled diode pumped Nd doped Glass pump laser. The lasers will be able to provide focused intensities attaining >1018-21 Wcm-2 suitable for generation of x-rays and particles (electrons and ions). We will discuss the infrastructure concerning the availability of experimental areas, including secondary sources of particles and x-rays in the wavelength range between 20 eV-100 keV and few Mev and their practical implementation at the ELI-Beamline user facility. The sources are either based on direct interaction of the laser beams with gaseous targets (high order harmonics) or will first accelerate electrons which then will interact with laser produced wigglers (Betatron radiation) or directly injected into undulators (laser driven LUX or later X-FEL). The direct interaction (collision) of laser accelerated electrons with the intense focused laser again will lead to short pulse high energy radiation via Compton or Thomson scattering for different applications opening also the route to fundamental physics investigations in high intensity interaction due to the 4 gamma 2 Lorentz boost of the intensity seen by high energy (GeV- > 106) electrons.

Proceedings Article | 10 July 2017 Paper

Radiation properties of Ni-like molybdenum x-ray laser at PALS

M. Albrecht, M. Kozlova, J. Nejdl

Proc. SPIE. 10243, X-ray Lasers and Coherent X-ray Sources: Development and Applications

KEYWORDS: Mirrors, Diagnostics, CCD cameras, Extreme ultraviolet, X-ray lasers, Molybdenum, Grazing incidence, Spherical lenses, Pulsed laser operation, Plasma

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Proceedings Article | 7 May 2017 Presentation + Paper

Laser-driven electron beam generation for secondary photon sources with few terawatt laser pulses

K. Bohacek, U. Chaulagain, V. Horny, M. Kozlova, M. Krus, J. Nejdl

Proc. SPIE. 10240, Laser Acceleration of Electrons, Protons, and Ions IV

KEYWORDS: Electron beams, Femtosecond phenomena, Argon, Spectroscopy, Particles, X-rays, X-ray sources, Physics, CCD cameras, Laser stabilization, Plasma physics, Compton scattering, Pulsed laser operation, Plasma

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Proceedings Article | 7 May 2017 Paper

X-ray phase contrast imaging of biological samples using a betatron x-ray source generated in a laser wakefield accelerator

U. Chaulagain, K. Bohacek, M. Kozlova, J. Nejdl, M. Krus, V. Horny, B. Mahieu, K. Ta-Phuoc

Proc. SPIE. 10240, Laser Acceleration of Electrons, Protons, and Ions IV

KEYWORDS: Phase contrast, Tissues, X-rays, X-ray sources, Electrons, Radiography, Laser beam propagation, X-ray imaging, X-ray detectors, Plasma, Absorption

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Proceedings Article | 30 September 2013 Paper

Development of x-ray sources using PW laser systems at APRI GIST

Hyung Taek Kim, Kyoung Hwan Lee, Hyeok Yun, I Jong Kim, Chul Min Kim, Ki Hong Pae, Jae Hee Sung, Sung Ku Lee, Tae Jun Yu, Stéphane Sebban, Fabien Tissandier, Julien Gautier, Adrien Depresseux, Jaroslav Nejdl, Michaela Kozlová, Tae Moon Jeong, Chang Hee Nam

Proc. SPIE. 8849, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications X

KEYWORDS: Electron beams, X-rays, X-ray sources, Nitrogen, Laser development, Fourier transforms, X-ray lasers, X-ray imaging, Pulsed laser operation, Plasma

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Proceedings Article | 30 September 2013 Paper

Analysis of spatial resolution and coherence demands in soft x-ray image-plane holographic microscopy with two zone plates

Jaroslav Nejdl, Isela Howlett, David Carlton, Erik Anderson, Weilun Chao, Mario Marconi, Jorge Rocca, Carmen Menoni

Proc. SPIE. 8849, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications X

KEYWORDS: Diffraction, Holograms, Holography, Digital holography, Sensors, Microscopy, X-rays, X-ray microscopy, Spatial resolution, Zone plates

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Proceedings Article | 27 September 2013 Paper

Development and applications of x-ray lasers at PALS Centre

M. Kozlova, J. Nejdl, A. Klisnick, A. Le Marec, L. Meng, F. Tissandier, T. Fok, L. Wegrzynski, A. Bartnik, P. Wachulak, R. Jarocki, H. Fiedorowicz

Proc. SPIE. 8849, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications X

KEYWORDS: Temporal coherence, Mirrors, Zinc, Amplifiers, Iodine, Spatial coherence, Sapphire lasers, X-ray lasers, Plasma, Laser systems engineering

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Proceedings Article | 22 February 2013 Paper

Wavefront measurement and data analysis of XUV HHG beam

P. Homer, B. Rus, J. Hrebicek, J. Nejdl

Proc. SPIE. 8600, Laser Resonators, Microresonators, and Beam Control XV

KEYWORDS: Optical filters, Mirrors, Sensors, Wavefront sensors, Wavefronts, Extreme ultraviolet, Aluminum, Spherical lenses, Signal detection, Data analysis

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Proceedings Article | 4 October 2011 Paper

Advances in laser driven soft x-ray lasers at LOA

S. Sebban, F. Tissandier, J. Gautier, M. Kozlova, J. P. Goddet, O. Guilbaud, P. Zeitoun, M. Ribière, S. Jacquemot, G. Lambert, G. Maynard, B. Robillard, A. Klisnick, T. Mocek, J. Nejdl

Proc. SPIE. 8140, X-ray Lasers and Coherent X-ray Sources: Development and Applications IX

KEYWORDS: Mirrors, Optical amplifiers, Electrons, Ions, Nitrogen, Amplifiers, Ionization, X-ray lasers, Neon, Plasma

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