Fundamental Techniques for High Photon Energy Stability of a Modern Soft X-ray Beamline

Abstract

High energy resolution and high energy stability are required for modern soft x‐ray beamlines. Attempts at improving the energy stability are presented in this paper. Some measures have been adopted to avoid energy instability. It is clearly observed that the unstable temperature of the support frame of the optical elements results in photon energy instability. A photon energy stability of 10 meV for half a day is achieved by controlling the temperature with an accuracy of 0.01°C.