Continuous-wave laser absorption spectroscopy of the thorium-229 nucleus – Nature0

• SCIENCE, Science / Health, Science Mission Directorate, scientists, Space, Space Communications & Navigation Program, Space Launch System (SLS), Space Telescope, space-x-ipo, SpaceX
• September 20, 2026

Experimental apparatus and VUV beam guiding The design of the spectroscopy apparatus is shown in Extended Data Fig. 1. It consists of the chamber with the SBO crystal for SHG frequency conversion, a vacuum beamline, a VUV spectrometer and a spectroscopy chamber with a thorium-doped crystal and the detection system. The generated VUV beam is aligned