Presentation + Paper
17 December 2024 Countermeasures for the mirror carbonization in ELI-NP
Takahisa Jitsuno, Antonia Toma, Petrisor Gabriel Bleotu, Stefan Popa, Alexandra Grigore, Alexandru Lazar, Sergiu Rusnac, Fattima Al-Abedj, Silvana Vasilca, Viviana Vladutescu, Yoshihide Nakamiya, Madalin Rosu, Daniel Ursescu, Ioan Dancus, Cristian Stancu, Gheorghe Dinescu
Author Affiliations +
Abstract
We report the current observations of the carbonization problem in ELI-NP laser beamlines. All the beamlines of 0.1 to 10 PW had the carbonization of the beam transport mirrors at fs pulse in vacuum. We tested 3 different cleaning methods to remove this carbonization, namely the dip cleaning in the water-alcohol mixture, oxygen plasma cleaner, and pump down with silica gel. The dip cleaning was applied to 1 PW mirror to remove the contamination before the carbonization was observed. For the first time for large mirrors. The oxygen plasma can remove surface carbon, but it is not enough to remove the carbon inside the coating. Silica gel provides some slow pumping of the vacuum and some increase of low-mass gasses due to the increased surfaces. The method to identify the pass-way of the contamination into the vacuum chamber was proposed.
Conference Presentation
© (2024) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Takahisa Jitsuno, Antonia Toma, Petrisor Gabriel Bleotu, Stefan Popa, Alexandra Grigore, Alexandru Lazar, Sergiu Rusnac, Fattima Al-Abedj, Silvana Vasilca, Viviana Vladutescu, Yoshihide Nakamiya, Madalin Rosu, Daniel Ursescu, Ioan Dancus, Cristian Stancu, and Gheorghe Dinescu "Countermeasures for the mirror carbonization in ELI-NP", Proc. SPIE 13190, Laser-Induced Damage in Optical Materials 2024, 131900L (17 December 2024); https://doi.org/10.1117/12.3032895
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Contamination

Mirrors

Silica

Coating

Vacuum

Plasma

Laser systems engineering

Back to Top