Frequency division multiplexing readout of a transition edge sensor bolometer array with microstrip-type electrical bias lines

Review of Scientific Instruments, vol. 93, pp. 124901

Abstract

We demonstrate multiplexed readout of 43 transition edge sensor (TES) bolometers operating at 90 mK using a frequency division multiplexing (FDM) readout chain with bias frequencies ranging from 1 to 3.5 MHz and a typical frequency spacing of 32 kHz. We improve the previously reported performance of our FDM system by two important steps. First, we replace the coplanar wires with microstrip wires, which minimize the cross talk from mutual inductance. From the measured electrical cross talk (ECT) map, the ECT of all pixels is carrier leakage dominated. Only five pixels show an ECT level higher than 1%. Second, we reduce the thermal response speed of the TES detectors by a factor of 20 by increasing the heat capacity of the TES, which allows us to bias all TES detectors below 50% in transition without oscillations. We compare the current-voltage curves and noise spectra of the TESs measured in single-pixel mode and multiplexing mode. We also compare the noise equivalent power (NEP) and the saturation power of the bolometers in both modes, where 38 pixels show less than 10% difference in NEP and 5% difference in saturation power when measured in the two different modes. The measured noise spectrum is in good agreement with the simulated noise based on measured parameters from an impedance measurement, confirming that our TES is dominated by phonon noise.

Authors 12

1. Qian Wang Aachen SRON Netherlands Institute for Space Research 1

   University of Groningen · Space Research Organisation Netherlands

   Affiliation as printed

   Kapteyn Astronomical Institute, University of Groningen 2 , 9747 AD Groningen, The Netherlands

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

2. P. Khosropanah Aachen SRON Netherlands Institute for Space Research 1

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

3. Jan van der Kuur Aachen SRON Netherlands Institute for Space Research 1

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

4. Gert de Lange Aachen SRON Netherlands Institute for Space Research 1

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

5. Michael D. Audley Aachen SRON Netherlands Institute for Space Research 1

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

6. A. Aminaei Aachen SRON Netherlands Institute for Space Research 1

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

7. Saad Ilyas Aachen SRON Netherlands Institute for Space Research 1

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

8. M. Ridder Aachen SRON Netherlands Institute for Space Research 1

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

9. Anton J. van der Linden Aachen SRON Netherlands Institute for Space Research 1

   Space Research Organisation Netherlands

   Affiliation as printed

   SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

10. M. P. Bruijn Aachen SRON Netherlands Institute for Space Research 1

    Space Research Organisation Netherlands

    Affiliation as printed

    SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

11. Floris F. S. van der Tak Aachen SRON Netherlands Institute for Space Research 1

    University of Groningen · Space Research Organisation Netherlands

    Affiliation as printed

    Kapteyn Astronomical Institute, University of Groningen 2 , 9747 AD Groningen, The Netherlands

    SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands

12. J. R. Gao corresponding Aachen SRON Netherlands Institute for Space Research 1

    Space Research Organisation Netherlands · Delft University of Technology

    Affiliation as printed

    Optics Group, Department of Imaging Physics, Delft University of Technology 3 , 2628 CJ Delft, The Netherlands

    SRON Netherlands Institute for Space Research 1 , Landleven 12, 9747 AD Groningen and Niels Bohrweg 4, 2333 CA Leiden, The Netherlands