Filter and baffle design for the short-wavelength camera on SOLAR-C EUVST

@misc{mckevitt2026filter,
  title = {{Filter and baffle design for the short-wavelength camera on SOLAR-C EUVST}},
  author = {James McKevitt and Duncan Rust and Berend Winter and David Walton and Sarah Matthews and Ted Pyne and Yukio Katsukawa and Ryohko Ishikawa and Alexey Shitvov and Chloe Wishart and Barry Whiteside and Jacob Parker and Diagarajen Carpanen},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.07021},
  eprint = {2609.07021},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.07021},
}

TY  - UNPB
TI  - Filter and baffle design for the short-wavelength camera on SOLAR-C EUVST
AU  - James McKevitt
AU  - Duncan Rust
AU  - Berend Winter
AU  - David Walton
AU  - Sarah Matthews
AU  - Ted Pyne
AU  - Yukio Katsukawa
AU  - Ryohko Ishikawa
AU  - Alexey Shitvov
AU  - Chloe Wishart
AU  - Barry Whiteside
AU  - Jacob Parker
AU  - Diagarajen Carpanen
PY  - 2026
DA  - 2026/09/07
PB  - arXiv
DO  - 10.48550/arxiv.2609.07021
UR  - https://arxiv.org/abs/2609.07021
AB  - SOLAR-C, which is scheduled to launch in the late 2020s with the Extreme Ultraviolet High-Throughput Spectroscopic Telescope (EUVST), will deliver EUV spectroscopy of the solar atmosphere with unprecedented temperature coverage and resolution. We present the optical design and mechanical impacts for the short-wavelength camera, and how our design choices affect scientific performance using complete forward modelling. We discuss the design and optical impact of the thin-film aluminium filter and supporting mesh, including diffraction and shadowing effects in spectral and spatial dimensions. We analyse this using our own Fourier optics method and analytical modelling, and quantify the scientific impact using forward modelling driven by a simulated solar atmosphere. We address the vulnerability of thin-film filters during launch depressurisation using vacuum chamber testing. We describe the stray-light baffle design and low-scatter coatings which suppress visible stray light.
ER  -