Investigating the damage threshold of X-ray mirror B4C-coated/Si-substrate) at grazing incidence and determining electron collision length at 1keV at the European XFEL

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00637916" target="_blank" >RIV/68378271:_____/25:00637916 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/25:00647873

Výsledek na webu

<a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/13533/3058267/Investigating-the-damage-threshold-of-x-ray-mirror-B4C-coated/10.1117/12.3058267.short" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/13533/3058267/Investigating-the-damage-threshold-of-x-ray-mirror-B4C-coated/10.1117/12.3058267.short</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.3058267" target="_blank" >10.1117/12.3058267</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigating the damage threshold of X-ray mirror B4C-coated/Si-substrate) at grazing incidence and determining electron collision length at 1keV at the European XFEL

Popis výsledku v původním jazyce

X-ray Free Electron Laser (XFEL) facilities provide significant advantages over conventional X-ray sources, generating ultra-intense pulses beyond mJ/pulse, with exceptionally high peak power, ultrashort pulse durations in the femtosecond range, and spectral bandwidths of just a few tens of eV. At the European XFEL, a total of up to 27,000 X-ray pulses are delivered every second at a repetition rate of 4.5MHz. Such capabilities enable groundbreaking scientific applications but also pose serious challenges- particularly the risk of optical component damage and beam quality degradation. For X-ray transport mirrors, boron carbide (B4C) coatings are widely used in moderate photon energy ranges due to their excellent thermal properties, high melting point, low density, and low atomic number. This study focuses on evaluating the damage threshold of B4C coatings on silicon substrates under soft X-ray FEL pulses at grazing incidence angles. Experiments were conducted at the SQS instrument of the European XFEL. A key parameter that influences damage thresholds is the electron collision length, as femtosecond pulse events enable energy transport beyond the absorption layer. Our findings indicate an electron collision length of approximately 8.6nm for the B4C coating, pointing to superior heat dissipation and higher radiation tolerance. These insights are vital for designing resilient optics suited to XFEL demands, advancing ultrafast and high intensity X-ray science.

Název v anglickém jazyce

Investigating the damage threshold of X-ray mirror B4C-coated/Si-substrate) at grazing incidence and determining electron collision length at 1keV at the European XFEL

Popis výsledku anglicky

X-ray Free Electron Laser (XFEL) facilities provide significant advantages over conventional X-ray sources, generating ultra-intense pulses beyond mJ/pulse, with exceptionally high peak power, ultrashort pulse durations in the femtosecond range, and spectral bandwidths of just a few tens of eV. At the European XFEL, a total of up to 27,000 X-ray pulses are delivered every second at a repetition rate of 4.5MHz. Such capabilities enable groundbreaking scientific applications but also pose serious challenges- particularly the risk of optical component damage and beam quality degradation. For X-ray transport mirrors, boron carbide (B4C) coatings are widely used in moderate photon energy ranges due to their excellent thermal properties, high melting point, low density, and low atomic number. This study focuses on evaluating the damage threshold of B4C coatings on silicon substrates under soft X-ray FEL pulses at grazing incidence angles. Experiments were conducted at the SQS instrument of the European XFEL. A key parameter that influences damage thresholds is the electron collision length, as femtosecond pulse events enable energy transport beyond the absorption layer. Our findings indicate an electron collision length of approximately 8.6nm for the B4C coating, pointing to superior heat dissipation and higher radiation tolerance. These insights are vital for designing resilient optics suited to XFEL demands, advancing ultrafast and high intensity X-ray science.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LM2023068" target="_blank" >LM2023068: Prague Asterix Laser System</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Optics Damage and Materials Processing by EUV/X-ray Radiation (XDam9)

ISBN

—

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

5

Strana od-do

1353303

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

Prague

Datum konání akce

7. 4. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001559199900002