SRON is developing an electronic read-out system for an array of Transition-Edge Sensors (TES) which combines the techniques of Frequency Domain Multiplexing (FDM) with Base-Band FeedBack (BBFB). Its potential astronomical applications are in the read-out of soft X-ray microcalorimeters of the XMS instrument on the International X-ray Observatory (IXO) and the far-IR bolometers of the SAFARI instrument on the Japanese-European mission SPICA. In this paper we focus on the experimental verification of the system, demonstrating for 16 pixels that simultaneous read-out does not degrade the noise performance, and that crosstalk between pixels is close to the requirements for IXO. A detailed analysis of the BBFB system is presented, identifying its limitations and routes for improvement to the levels required for implementation on both missions.
- SQUID read-out electronics
Den Hartog, R., Beyer, J., Boersma, D., Bruijn, M., Gottardi, L., Hoevers, H., Hou, R., Kiviranta, M., De Korte, P., Van Der Kuur, J., Van Leeuwen, B-J., Lindeman, M., & Nieuwenhuizen, A. (2011). Frequency domain multiplexed readout of TES detector arrays with baseband feedback. IEEE Transactions on Applied Superconductivity, 21(3 ), 289-293. https://doi.org/10.1109/TASC.2010.2101998