Measurement Of Energy Resolution For TES Microcalorimeter With Optical   Pulses
  Energy resolution is an important figure of merit for TES microcalorimeter. We propose a laser system to measure the energy resolution of TES microcalorimeter with a 1550 nm laser source. Compared to method that characterizes the performance by irradiating the detector using X-ray photons from a radioactive source placed inside the refrigerator, our system is safer and more convenient. The feasibility of this system has been demonstrated in the measurement of an Al/Ti bilayer TES microcalorimeter. In this experiment, the tested detector showed a energy resolution of 72 eV in the energy range from 0.2 keV to 0.9 keV 
Shuo Zhang and Qing-Ya Zhang and CongZhan Liu and Jianshe Liu and   Wenhui Dong and Wei Chen
physics.ins-det nucl-ex