Paper 13093-191
Paper 13093-191
Development of precision Wolter mirrors for future soft x-ray observations of the sun
17 June 2024 • 17:30 - 19:00 Japan Standard Time | Room G5, North - 1F
Abstract
We report our development activities of precision Wolter mirrors for future soft X-ray imaging observations of the Sun.
By direct polishing of a glass-ceramic substrate, an engineering Wolter mirror of 3-m focal length was fabricated whose mirror area was 40 mm x 50 mm for each of the parabola and hyperbola sections. X-ray imaging performance of the mirror was then evaluated with 8-keV parallel X-rays at SPring-8/BL29XUL. For the mirror area whose tilt up to >6 degrees along the cylindrical direction, the mirror showed imaging performance of ~0.25 arcsec FWHM (~0.55 arcsec HPD) with the scattering level ~1 x 10^(-4) of the PSF peak at 30-arcsec off-axis position.
Status of the development including the above result will be reported and future prospects will be discussed.
Presenter
Institute of Space and Astronautical Science (Japan)
Taro Sakao works as one of the core members of Hinode solar-observing satellite, chiefly on the X-Ray Telescope (XRT) beginning from its development stage. His primary research interest is in high-energy plasma processes in the X-ray corona, particularly those in flares including particle acceleration and heating of plasmas. He is also engaged in developing advanced instrumentation for future X-ray observations of the Sun.