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

Result code in 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>
Alternative codes found
RIV/68407700:21340/24:00373451 RIV/CZ______:_____/24:N0000011
Result on the web
<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>

Result language
angličtina
Original language name
Metrology for sub-Rayleigh-length target positioning in ∼1022 W/cm2 laser-plasma experiments
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
<a href="/en/project/EF16_019%2F0000789" target="_blank" >EF16_019/0000789: Advanced research using high intensity laser produced photons and particles</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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