@inproceedings{625c0886228441b68d9603fa950ce701,
title = "Ultrafast laser welding of X-ray mirror segment stacks",
abstract = "Designing and building X-ray telescopes that observe the high-energy universe with large-effective area and sub-arcsecond angular resolution has proven to be a great optomechanical challenge, as thin, tightly nested grazing-incidence mirrors are easily deformed during assembly. We are developing a bonding and alignment process in which we fabricate spacers, bond them between thin mirrors, and re-align these mirrors after assembly, using a Hartmann test for alignment metrology. We implemented a non-contact slumping method to produce smooth Corning Eagle XG conical mirrors. Using an ultrafast laser, we welded fused silica spacers to flat fused silica mirrors to create mirror segment stacks. We performed a parameter study on ultrafast laser welding Eagle XG to fused silica, which we expect to enable building an X-ray mirror segment stack with our slumped Eagle XG mirrors and fused silica spacers.",
keywords = "X-ray astronomical optics, laser welding, optical assembly, ultrafast laser",
author = "McElwain, {Brody D.} and Arnold, {Ian J.} and Adel Al-Ghazwi and Kevin Laverty and Oh, {Chang Jin} and Paola Luna and Chalifoux, {Brandon D.}",
note = "Publisher Copyright: {\textcopyright} 2024 SPIE.; Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray ; Conference date: 16-06-2024 Through 21-06-2024",
year = "2024",
doi = "10.1117/12.3020781",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "{den Herder}, {Jan-Willem A.} and Shouleh Nikzad and Kazuhiro Nakazawa",
booktitle = "Space Telescopes and Instrumentation 2024",
}