EVEREST — Soft X-ray / XUV / VUV Spectrometer (1-200 nm, 6-1240 eV)

EVEREST is a flat-field grazing-incidence spectrometer that provides aberration-corrected imaging for precise characterization of radiation in soft X-ray, XUV, and VUV spectral ranges.

Its compact, flexible design supports measurements with or without an entrance slit, allowing users to maximize either spectral resolution or light collection efficiency. An integrated filter holder accommodates thin metallic filters for spectral selection and allows easy switching between experimental configurations.

EVEREST is an invaluable diagnostic tool for coherent and incoherent XUV sources, including high-harmonic generation (HHG) and laser-plasma sources, as well as general metrology and spectroscopy in the VUV and soft X-ray range.

Key Product Features

• Flat-field grazing-incidence spectrograph
• Wavelength coverage with single gratings:
  • Soft X-ray: 1-6 nm (206-1240 eV)
  • XUV: 5-20 nm / 20-80 nm (62-248 eV / 15-62 eV)
  • VUV: 50-200 nm (6-25 eV)
• Operation with and without entrance slit
• Integrated filter holder for metallic bandpass filters
• Compatible pressure range < 10⁻⁶ mbar
• Flexible detector choice: X-ray CCD camera (13.5 µm or 26 µm pixel) or MCP camera system
• User-friendly alignment, acquisition and analysis software

Optional Features

• Slit-less operation and various geometry adapters
• Oil-free pump system available for stand-alone vacuum operation
• Beam-profiler mode — use EVEREST to characterize spatial intensity distribution of HHG or laser-plasma sources
• In-vacuum switching between gratings (2-4)
• Extended wavelength ranges upon request

References

1. M. Behrens et al., Rev. Sci. Instrum. 95, 093101 (2024)
2. D. Walke et al., Opt. Express 33, 10006 (2025)

Developed at the Max-Planck-Institute of Quantum Optics. UFI is a spin-off from LMU Munich and the Max Planck Society.