Article

Journal of Low Temperature Physics

, Volume 167, Issue 5, pp 561-567

Open Access This content is freely available online to anyone, anywhere at any time.

The SPICA-SAFARI TES Bolometer Readout: Developments Towards a Flight System

  • J. van der KuurAffiliated withSRON National Institute for Space Research Email author 
  • , J. BeyerAffiliated withPTB - Berlin
  • , M. BruijnAffiliated withSRON National Institute for Space Research
  • , J. R. GaoAffiliated withSRON and Delft University of Technology
  • , R. den HartogAffiliated withSRON National Institute for Space Research
  • , R. HeijmeringAffiliated withSRON National Institute for Space Research
  • , H. HoeversAffiliated withSRON National Institute for Space Research
  • , B. JacksonAffiliated withSRON National Institute for Space Research
  • , B. J. van LeeuwenAffiliated withSRON National Institute for Space Research
    • , M. LindemanAffiliated withSRON National Institute for Space Research
    • , M. KivirantaAffiliated withVTT, The Technical Research Centre of Finland
    • , P. de KorteAffiliated withSRON National Institute for Space Research
    • , P. MauskopfAffiliated withCardiff University
    • , P. de KorteAffiliated withSRON National Institute for Space Research
    • , H. van WeersAffiliated withSRON National Institute for Space Research
    • , S. WithingtonAffiliated withCavendish Laboratory, University of Cambridge

Abstract

SAFARI is an imaging Fourier Transform Spectrometer for 35–200 μm under development for flight on the Japanese IR-satellite SPICA (2018). The 3.25 m diameter actively cooled telescope (<6K) will provide a sky background limited signal, which implies that detectors will need to have an NEP of \(3.5 \cdot10^{-19}\ \mbox{W/}\sqrt{\mathrm{Hz}}\) in order not to be limiting the sensitivity. The instrument will utilize three TES-based detector arrays, covering the 2×2 arcmin field-of-view in three octaves of wave length. This contribution will present an overview of the detector sub-system, i.e.: the detector arrays and radiation coupling, the focal plane assembly, the amplification chain and the frequency-domain- multiplexed electronics. The focus will be on the implications on the system design of the readout under the stringent power dissipation, heat load, and weight limitations.

Keywords

Multiplexing FDM TES