Comprehensive investigation of laser energy transport to a massive planar targets with femtosecond polaro-interferometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F16%3A00328723" target="_blank" >RIV/68407700:21230/16:00328723 - isvavai.cz</a>

Výsledek na webu

<a href="http://ocs.ciemat.es/EPS2016PAP/pdf/P5.077.pdf" target="_blank" >http://ocs.ciemat.es/EPS2016PAP/pdf/P5.077.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Comprehensive investigation of laser energy transport to a massive planar targets with femtosecond polaro-interferometry

Popis výsledku v původním jazyce

The experiments were realized on Prague Asterix Laser System (PALS) using the first harmonic of the iodine laser beam with the energy in range of 100- 500 J and the pulse duration of 350 ps. The plasma was created by the irradiation of the bare and plastic coated Cu massive planar targets using both the linear and the circular polarized laser beam which was focused to the minimum focal spot radius of RL=50 um. The primary goal of the current project is to understand the interrelation of spontaneous magnetic field (SMF) creation and fast electron generation in laser plasma produced from planar targets. Two-channel polarointerferometer and the crater volume measurements were applied as the main diagnostics to investigate SMF and efficiency of laser energy transfer to the target. The differences in the fast electron production due to the polarization of the laser beam were monitored by 2D imaging of the Cu K-alpha emission source in the irradiated target. The measured distributions of the SMF during the interaction of the laser pulse with the ablative plasma clearly show that the SMF amplitude is higher in the case of the linearly polarized beam. The data on the efficiency of laser energy transport into the massive target was concluded using the ratio of measured values of total number of thermal electrons of ablated plasma and crater volume. Slightly higher fast electron emission was observed at the circular polarization of the laser beam incident on both bare and plastic coated Cu targets. As an additional diagnostic, the measurements of the total current flowing through the target were carried out by means of the current probe and the found values were compared with results from the SMF measurements.

Název v anglickém jazyce

Comprehensive investigation of laser energy transport to a massive planar targets with femtosecond polaro-interferometry

Popis výsledku anglicky

The experiments were realized on Prague Asterix Laser System (PALS) using the first harmonic of the iodine laser beam with the energy in range of 100- 500 J and the pulse duration of 350 ps. The plasma was created by the irradiation of the bare and plastic coated Cu massive planar targets using both the linear and the circular polarized laser beam which was focused to the minimum focal spot radius of RL=50 um. The primary goal of the current project is to understand the interrelation of spontaneous magnetic field (SMF) creation and fast electron generation in laser plasma produced from planar targets. Two-channel polarointerferometer and the crater volume measurements were applied as the main diagnostics to investigate SMF and efficiency of laser energy transfer to the target. The differences in the fast electron production due to the polarization of the laser beam were monitored by 2D imaging of the Cu K-alpha emission source in the irradiated target. The measured distributions of the SMF during the interaction of the laser pulse with the ablative plasma clearly show that the SMF amplitude is higher in the case of the linearly polarized beam. The data on the efficiency of laser energy transport into the massive target was concluded using the ratio of measured values of total number of thermal electrons of ablated plasma and crater volume. Slightly higher fast electron emission was observed at the circular polarization of the laser beam incident on both bare and plastic coated Cu targets. As an additional diagnostic, the measurements of the total current flowing through the target were carried out by means of the current probe and the found values were compared with results from the SMF measurements.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LD14089" target="_blank" >LD14089: Rozvoj fyziky a vědecké komunity pro inerciální fúzi v době jejího zapálení na NIF</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

43rd EPS Conference on Plasma Physics (EPS 2016), Europhysics Conference Abstracts Volume 40A

ISBN

978-1-5108-2947-3

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

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Název nakladatele

European Geophysical Society

Místo vydání

Haague

Místo konání akce

Leuven

Datum konání akce

4. 7. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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