A multiplexer for the ac/dc characterization of TES based bolometers and   microcalorimeters
  At SRON we are developing the Frequency Domain Multiplexing (FDM) for the read-out of the TES-based detector array for the future infrared and X-ray space mission. We describe the performances of a multiplexer designed to increase the experimental throughput in the characterisation of ultra-low noise equivalent power (NEP) TES bolometers and high energy resolving power X-ray microcalorimeters arrays under ac and dc bias. We discuss the results obtained using the TiAu TES bolometers array fabricated at SRON with measured dark NEP below $5\cdot 10^{-19}W/Hz^{1/2}$ and saturation power of several fW 
Luciano Gottardi, Hiroki Akamatsu, Marcel Bruijn, Jan R. Gao, Roland   den Hartog, Richard Hijmering, Henk Hoevers, Pourya K...
astro-ph.IM physics.ins-det