Performance of a low-parasitic frequency domain multiplexing architecture

23 Jul 2019, 17:45
1h 15m
Piazza Città di Lombardia (Milano)

Piazza Città di Lombardia

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Poster Detector readout, signal processing, and related technologies Poster session

Speaker

Dr Amy E. Lowitz (Kavli Institute for Cosmological Physics - University of Chicago)

Description

Frequency division multiplexing (FDM) is a readout technique for transition edge sensor-based bolometer arrays used on telescopes including SPT-3G, POLARBEAR-2, and LiteBIRD. Here we present the latest progress and plans for development of a minimal-parasitic FDM architecture. This technology will enable ultra-large focal planes for future instruments such as CMB-S4. Reduced wiring length between the MHz resonators and series SQUID array ameliorates parasitic impedances which contribute to crosstalk and limit operation of low-resistance bolometers. We have demonstrated improved electrical performance including reduced stray inductance and reduced stray resistance. This will enable operation of low-resistance bolometers and higher multiplexing factors in future arrays. Operating bolometers at lower resistance will decrease the contribution of readout noise to the total NEP by decreasing the required voltage bias. Ongoing work seeks further improvement in circuit parasitics and a laboratory demonstration of this architecture integrated with low-resistance bolometers.

Student (Ph.D., M.Sc. or B.Sc.) N
Less than 5 years of experience since completion of Ph.D Y

Primary authors

Dr Amy E. Lowitz (Kavli Institute for Cosmological Physics - University of Chicago) Dr Peter Barry (High Energy Physics Division - Argonne National Laboratory) Dr Amy N. Bender ( High Energy Physics Division - Argonne National Laboratory,) Dr Thomas W. Cecil ( High Energy Physics Division - Argonne National Laboratory) Dr Clarence L. Chang (High Energy Physics Division - Argonne National Laboratory) Dr Ralu Divan (Center for Nanoscale Materials - Argonne National Laboratory) Dr Matthew A. Dobbs (Department of Physics - McGill University) Adam J. Gilbert (Department of Physics - McGill University) Dr Stephen Kuhlmann (High Energy Physics Division - Argonne National Laboratory) Marharyta Lisovenko (Materials Science Division - Argonne National Laboratory) Dr Valentine Novosad (Materials Science Division - Argonne National Laboratory) Dr Stephen Padin ( High Energy Physics Division - Argonne National Laboratory) John Pearson (Materials Science Division - Argonne National Laboratory) Dr Gensheng Wang ( High Energy Physics Division - Argonne National Laboratory) Volodymyr Yefremenko ( High Energy Physics Division - Argonne National Laboratory)

Presentation Materials