Elaboration of 3-frame complex interferometry for optimization studies of capacitor-coil optical magnetic field generators

Pisarczyk, T.; Santos, J. J.; Dudžák, R.; Zaraś-Szydłowska, A.; Ehret, M.; Rusiniak, Z.; Dostál, J.; Chodukowski, T.; Renner, O.; Gus’kov, S. Yu.; Korneev, Ph.; Burian, T.; Vlachos, Ch.; Kochetkov, Yu. Yu.; Makaruk, D.; Rosiński, M.; Kalal, M.; Krupka, M.; Pfeifer, M.; Klír, D.; Cikhardt, J.; Krása, J.; Singh, Sushil; Borodziuk, S.; Krůs, M.; Juha, L.; Hřebíček, J.; Golasowski, J.; Skála, J.

doi:10.1088/1748-0221/14/11/c11024

Cited by 10 publications

(12 citation statements)

References 11 publications

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“…Use of ultra-fast probe beam can fix the first problem, good control over laser parameters and additional interferometric filters can reduce contribution of other factors. Note that the implementation of the complex interferometry setup presented in [5,19] corresponds to this situation. Thus the interferometry accuracy is limited mainly by the limited resolution of the CCD and depends on spatial frequency of fringes.…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…This change may be induced by magneto-optical effects, and to connect measured data with magnetic field parameters the additional information about the medium in which the polarization plane rotates is required. In particular, the polarimetry as an independent diagnostics can be used for measurement of quasistationary vacuum magnetic fields by placing the birefringent crystal with known parameters in the field area [4,5] .…”

Section: Introductionmentioning

confidence: 99%

“…The complex interferometry concept dates back to first SMF studies, and provides excellent spatial resolution [19][20][21] . However, due to setup and data processing complexity it was not widely used until recently, when a femtosecond complex interferometry system had been tested and implemented at the PALS facility in a single-frame regime [7] , and later was upgraded to 3-frame system [5] . This setup (see simplified optical scheme of one channel at Fig.…”

Section: Introductionmentioning

confidence: 99%

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Complex interferometry of magnetized plasma: accuracy and limitations

Kochetkov,

Pisarczyk,

Kalal

et al. 2021

Preprint

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Expanding laser plasmas, produced by high energy laser radiation, possess both high thermal and magnetic field energy density. Characterization of such plasma is challenging but needed for understanding of its physical behaviour. Among all standard experimental techniques for plasma diagnostics, classical interferometry is one of the most convenient, informative and accurate. Attempts to extract more information from each single laser shot have led to development of complex interferometry, which under certain processing allows to reconstruct both plasma electron density and magnetic field strength distributions using just one data object. However, the increase in complexity and universality of the diagnostics requires a more detailed analysis of the extracted values and their accuracy. This work focuses on axisymmetric interaction geometry. We present general analysis, starting from the basic principles and trace main error sources, finally ending up with plasma density and magnetic field distributions with the derived error bars. Use of synthetic profiles makes the analysis universal, though we present an example with real experimental data in the Appendix.

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Section: Mathematical Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Complex interferometry of magnetized plasma: accuracy and limitations

Kochetkov,

Pisarczyk,

Kalal

et al. 2021

Preprint

Self Cite

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“…The conversion efficiency of the laser light into hot electrons was determined from the quantitative evaluation of images taken on bare Cu targets, whereas to determine the energy of the hot electrons, the Cu targets coated with different thickness layers of the CH plastic (∆ pl = 15, 25, 50 and 100 µm) were used. The details on the evaluation procedure can be found below and in [22,26].…”

Section: D Imaging Of the Kα Line Emission From Cumentioning

confidence: 99%

“…This unique tool provides time-dependent information on the laser plasma density and the SMF distributions with micrometer-scale spatial and femtosecond-scale temporal resolution. The optical diagnostic technique is based on the amplitude-phase analysis of complex interferograms [20][21][22], the information on both the density and magnetic field distributions are collected at a given moment by a common channel. In order to obtain a description of the hot electron distribution that is as detailed as possible, massive and layered Cu targets (massive Cu coated by different thickness layers of plastic) were used, facilitating an application of the 2D imaging of the Kα line emission from Cu.…”

Section: Introductionmentioning

confidence: 99%

Hot electron retention in laser plasma created under terawatt subnanosecond irradiation of Cu targets

Pisarczyk

Kalal

Gus'kov

et al. 2020

Plasma Phys. Control. Fusion

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Laser plasma created by intense light interaction with matter plays an important role in high-energy density fundamental studies and many prospective applications. Terawatt laser-produced plasma related to the low collisional and relativistic domain may form supersonic flows and is prone to the generation of strong spontaneous magnetic fields. The comprehensive experimental study presented in this work provides a reference point for the theoretical description of laser-plasma interaction, focusing on the hot electron generation. It experimentally quantifies the phenomenon of hot electron retention, which serves as a boundary condition for most plasma expansion models. Hot electrons, being responsible for nonlocal thermal and electric conductivities, are important for a large variety of processes in such plasmas. The multiple-frame complex-interferometric data providing information on time resolved spontaneous magnetic fields and electron density distribution, complemented by particle spectra and x-ray measurements, were obtained under irradiation of the planar massive Cu and plastic-coated targets by the iodine laser pulse with an intensity of above 1016 W cm−2. The data shows that the hot electron emission from the interaction region outside the target is strongly suppressed, while the electron flow inside the target, i.e. in the direction of the incident laser beam, is a dominant process and contains almost the whole hot electron population. The obtained quantitative characterization of this phenomenon is of primary importance for plasma applications spanning from ICF to laser-driven discharge magnetic field generators.

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2D MHD simulation of spontaneous magnetic fields generated during interaction of 1315.2-nm laser radiation with copper slabs at 1016 W/cm2

et al. 2021

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Multidimensional modeling of phenomena and processes occurring during the expansion of the laser-produced plasma for different irradiation conditions related to both the laser beam parameters and the target constructions is a very complex issue, especially when modeling requires consideration of kinetic processes associated with the development of various types of microscopic instability. Multidimensional PIC codes create such a possibility, but their use is limited to modeling phenomena even in a very narrow timescale due to the limited computational capabilities of current supercomputers. For this reason, the paper attempts to interpret the results of the spontaneous magnetic field (SMF) measurements obtained during the PALS (Prague Asterix Laser System) experiment [Pisarczyk et al., AIP Adv. 10, 115201 (2020); Pisarczyk et al., Phys. Plasmas 22, 102706 (2015)] based on the 2D magneto-hydrodynamic (MHD) model [Jach et al., Computer Modeling of Dynamic Interaction of Bodies by Free Point Method (PWN, Warsaw, 2011)]. The MHD equations were used with included arbitrary (i) current of hot electrons treating it as an additional external current and (ii) ion-sound instability responsible for the increase in anomalous resistance in areas with high temperature and low-density plasma. The spatial distribution of magnetic fields and current density obtained from 2D modeling are in acceptable agreement with the experimental results [Pisarczyk et al., Plasma Phys. Controlled Fusion 62, 115020 (2020); Zaraś-Szydłowska et al., AIP Adv. 10, 115201 (2020); Pisarczyk et al., Phys. Plasmas 22, 102706 (2015)]. The inclusion of temporal changes in anomalous resistance in modeling allowed us to explain the persistence of high SMF amplitude at the level of several megagauss after the laser pulse ended due to the effect of magnetic field freezing.

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Elaboration of 3-frame complex interferometry for optimization studies of capacitor-coil optical magnetic field generators

Cited by 10 publications

References 11 publications

Complex interferometry of magnetized plasma: accuracy and limitations

Complex interferometry of magnetized plasma: accuracy and limitations

Hot electron retention in laser plasma created under terawatt subnanosecond irradiation of Cu targets

2D MHD simulation of spontaneous magnetic fields generated during interaction of 1315.2-nm laser radiation with copper slabs at 1016 W/cm2

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