Distributed TES Model for Designing Low Noise Bolometers Approaching SAFARI Instrument Requirements

作者：Khosropanah P^*; Hijmering R A; Ridder M; Lindeman M A; Gottardi L; Bruijn M; van der Kuur J; de Korte P A J; Gao J R; Hoevers H

来源：Journal of Low Temperature Physics, 2012, 167(3-4): 188-194.

DOI：10.1007/s10909-012-0550-6

• Transition edge sensor
• TES
• Far infrared spectrometer
• Submm spectrometer
• SiN membrane
• Cryogenic detectors
• THz detectors

Transition edge sensors (TES) are the chosen detector technology for the SAFARI imaging spectrometer on the SPICA telescope. The TES are required to have an NEP of 2-3 x 10(-19) W/root Hz to take full advantage of the cooled mirror. SRON has developed TiAu TES bolometers for the short wavelength band (30-60 mu m). The TES are on SiN membranes, in which long and narrow legs act as thermal links between the TES and the bath. We present a distributed model that accounts for the heat conductance and the heat capacity in the long legs that provides a guideline for designing low noise detectors. We report our latest results that include a measured dark NEP of 4.2x10(-19) W/root Hz and a saturation power of about 10 fW.

• 出版日期2012-5