Digital frequency domain multiplexing readout electronics for the next generation of millimeter telescopes

Amy N. Bender; Jean-François Cliche; Tijmen de Haan; Matt A. Dobbs; Adam J. Gilbert; Joshua Montgomery; Neil Rowlands; Graeme M. Smecher; Ken Smith; Andrew Wilson

doi:10.1117/12.2054949

23 July 2014 Digital frequency domain multiplexing readout electronics for the next generation of millimeter telescopes

Amy N. Bender, Jean-François Cliche, Tijmen de Haan, Matt A. Dobbs, Adam J. Gilbert, Joshua Montgomery, Neil Rowlands, Graeme M. Smecher, Ken Smith, Andrew Wilson

Author Affiliations +

Proceedings Volume 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII; 91531A (2014) https://doi.org/10.1117/12.2054949
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

Frequency domain multiplexing (fMux) is an established technique for the readout of transition-edge sensor (TES) bolometers in millimeter-wavelength astrophysical instrumentation. In fMux, the signals from multiple detectors are read out on a single pair of wires reducing the total cryogenic thermal loading as well as the cold component complexity and cost of a system. The current digital fMux system, in use by POLARBEAR, EBEX, and the South Pole Telescope, is limited to a multiplexing factor of 16 by the dynamic range of the Superconducting Quantum Interference Device pre-amplifier and the total system bandwidth. Increased multiplexing is key for the next generation of large format TES cameras, such as SPT-3G and POLARBEAR2, which plan to have on the of order 15,000 detectors. Here, we present the next generation fMux readout, focusing on the warm electronics. In this system, the multiplexing factor increases to 64 channels per module (2 wires) while maintaining low noise levels and detector stability. This is achieved by increasing the system bandwidth, reducing the dynamic range requirements though active feedback, and digital synthesis of voltage biases with a novel polyphase filter algorithm. In addition, a version of the new fMux readout includes features such as low power consumption and radiation-hard components making it viable for future space-based millimeter telescopes such as the LiteBIRD satellite.

Citation Download Citation

Amy N. Bender, Jean-François Cliche, Tijmen de Haan, Matt A. Dobbs, Adam J. Gilbert, Joshua Montgomery, Neil Rowlands, Graeme M. Smecher, Ken Smith, and Andrew Wilson "Digital frequency domain multiplexing readout electronics for the next generation of millimeter telescopes", Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 91531A (23 July 2014); https://doi.org/10.1117/12.2054949

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available