First radiative shock experiments on the SG-II laser

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00546879" target="_blank" >RIV/68378271:_____/21:00546879 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0323784" target="_blank" >http://hdl.handle.net/11104/0323784</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/hpl.2021.17" target="_blank" >10.1017/hpl.2021.17</a>

Jazyk výsledku

angličtina

Název v původním jazyce

First radiative shock experiments on the SG-II laser

Popis výsledku v původním jazyce

We report on the design and first results from experiments looking at the formation of radiative shocks on the Shenguang II (SG-II) laser at the Shanghai Institute of Optics and Fine Mechanics in China. Laser-heating of a two-layer CH/CH–Br foil drives a ∼ 40 km/s shock inside a gas cell filled with argon at an initial pressure of 1 bar. The use of gas-cell targets with large (several millimeters) lateral and axial extent allows the shock to propagate freely without any wall interactions, and permits a large field of view to image single and colliding counter-propagating shocks with time-resolved, point projection X-ray backlighting (∼ 20 µm source size, 4.3 keV photon energy). Single shocks were imaged up to 100 ns after the onset of the laser drive, allowing to probe the growth of spatial nonuniformities in the shock apex. These results are compared with experiments looking at counter-propagating shocks, showing a symmetric drive that leads to a collision and stagnation from ∼ 40 ns onward. We present a preliminary comparison with numerical simulations with the radiation hydrodynamics code ARWEN, which provides expected plasma parameters for the design of future experiments in this facility.

Název v anglickém jazyce

First radiative shock experiments on the SG-II laser

Popis výsledku anglicky

We report on the design and first results from experiments looking at the formation of radiative shocks on the Shenguang II (SG-II) laser at the Shanghai Institute of Optics and Fine Mechanics in China. Laser-heating of a two-layer CH/CH–Br foil drives a ∼ 40 km/s shock inside a gas cell filled with argon at an initial pressure of 1 bar. The use of gas-cell targets with large (several millimeters) lateral and axial extent allows the shock to propagate freely without any wall interactions, and permits a large field of view to image single and colliding counter-propagating shocks with time-resolved, point projection X-ray backlighting (∼ 20 µm source size, 4.3 keV photon energy). Single shocks were imaged up to 100 ns after the onset of the laser drive, allowing to probe the growth of spatial nonuniformities in the shock apex. These results are compared with experiments looking at counter-propagating shocks, showing a symmetric drive that leads to a collision and stagnation from ∼ 40 ns onward. We present a preliminary comparison with numerical simulations with the radiation hydrodynamics code ARWEN, which provides expected plasma parameters for the design of future experiments in this facility.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/EF16_019%2F0000789" target="_blank" >EF16_019/0000789: Pokročilý výzkum s využitím fotonů a částic vytvořených vysoce intenzivními lasery</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

High Power Laser Science and Engineering

ISSN

2095-4719

e-ISSN

2052-3289

Svazek periodika

9

Číslo periodika v rámci svazku

Jun

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

e27

Kód UT WoS článku

000660802900001

EID výsledku v databázi Scopus

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