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

Result code in 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>

Result on the web

<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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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10305 - Fluids and plasma physics (including surface physics)

Project

<a href="/en/project/LD14089" target="_blank" >LD14089: Developing the Physics for Inertial Confinement Fusion at the time of NIF ignition</a><br>

Continuities

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

Publication year

2016

Confidentiality

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

Article name in the collection

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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Number of pages

4

Pages from-to

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Publisher name

European Geophysical Society

Place of publication

Haague

Event location

Leuven

Event date

Jul 4, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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