Metrology for sub-Rayleigh-length target positioning in ∼1022 W/cm2 laser-plasma experiments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F24%3A00617081" target="_blank" >RIV/61389021:_____/24:00617081 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/24:00373451 RIV/CZ______:_____/24:N0000011

Výsledek na webu

<a href="https://www.cambridge.org/core/journals/high-power-laser-science-and-engineering/article/metrology-for-subrayleighlength-target-positioning-in-1022-wcm2-laserplasma-experiments/6FA5DD003BEA4C2580740B06B3980625" target="_blank" >https://www.cambridge.org/core/journals/high-power-laser-science-and-engineering/article/metrology-for-subrayleighlength-target-positioning-in-1022-wcm2-laserplasma-experiments/6FA5DD003BEA4C2580740B06B3980625</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/hpl.2024.11" target="_blank" >10.1017/hpl.2024.11</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Metrology for sub-Rayleigh-length target positioning in ∼1022 W/cm2 laser-plasma experiments

Popis výsledku v původním jazyce

Tight focusing with very small f-numbers is necessary to achieve the highest at-focus irradiances. However, tight focusing imposes strong demands on precise target positioning in-focus to achieve the highest on-target irradiance. We describe several near-infrared, visible, ultraviolet and soft and hard X-ray diagnostics employed in a ∼1022 W/cm2 laser-plasma experiment. We used nearly 10 J total energy femtosecond laser pulses focused into an approximately 1.3-m focal spot on 5-20 m thick stainless-steel targets. We discuss the applicability of these diagnostics to determine the best in-focus target position with approximately 5 m accuracy (i.e., around half of the short Rayleigh length) and show that several diagnostics (in particular, 3 reflection and on-axis hard X-rays) can ensure this accuracy. We demonstrated target positioning within several micrometers from the focus, ensuring over 80% of the ideal peak laser intensity on-target. Our approach is relatively fast (it requires 10-20 laser shots) and does not rely on the coincidence of low-power and high-power focal planes.

Název v anglickém jazyce

Metrology for sub-Rayleigh-length target positioning in ∼1022 W/cm2 laser-plasma experiments

Popis výsledku anglicky

Tight focusing with very small f-numbers is necessary to achieve the highest at-focus irradiances. However, tight focusing imposes strong demands on precise target positioning in-focus to achieve the highest on-target irradiance. We describe several near-infrared, visible, ultraviolet and soft and hard X-ray diagnostics employed in a ∼1022 W/cm2 laser-plasma experiment. We used nearly 10 J total energy femtosecond laser pulses focused into an approximately 1.3-m focal spot on 5-20 m thick stainless-steel targets. We discuss the applicability of these diagnostics to determine the best in-focus target position with approximately 5 m accuracy (i.e., around half of the short Rayleigh length) and show that several diagnostics (in particular, 3 reflection and on-axis hard X-rays) can ensure this accuracy. We demonstrated target positioning within several micrometers from the focus, ensuring over 80% of the ideal peak laser intensity on-target. Our approach is relatively fast (it requires 10-20 laser shots) and does not rely on the coincidence of low-power and high-power focal planes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

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

12

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

e32

Kód UT WoS článku

001293398900001

EID výsledku v databázi Scopus

2-s2.0-85186686344