11-15 February 2013
Vienna University of Technology
Europe/Vienna timezone

Development of frequency-domain readout of Transition Edge Sensor bolometers for the POLARBEAR-2 Cosmic Microwave Background

Not scheduled
Vienna University of Technology

Vienna University of Technology

Gußhausstraße 25-29, 1040 Wien (Vienna), Austria
Board: 71
Poster Astroparticle Detectors


Kaori Hattori (High Energy Acceleration Research Organization)


The POLARBEAR-2 Cosmic Microwave Background (CMB) experiment aims to observe B-mode polarization with high sensitivity to explore gravitational lensing of CMB and inflationary gravitational waves. We will build a receiver that has 7,588 antenna-coupled, polarization sensitive Transition Edge Sensor (TES) bolometers. The kilopixel arrays of multi-band polarization-sensitive pixels are necessary to achieve the high sensitivity and stringent control of systematic errors required by these science goals. For the large array’s readout, we employ digital frequency-domain multiplexing and multiplex 32 bolometers through a single superconducting quantum interference device (SQUID). An 8-bolometer frequency-domain multiplexed readout has been deployed on multiple experiments. Extending that architecture to 32 bolometers requires an increase in the bandwidth of the SQUID electronics. To achieve this, we have implemented Digital Active Nulling (DAN) on the digital frequency multiplexing platform. With DAN, digital feedback is calculated for each bolometer, extending the useful bandwidth of the SQUID amplifier. Another factor limiting the current bandwidth is parasitic inductance, which we have reduced in our new readout architecture. We will show frequency-domain multiplexing up to 3 MHz.
quote your primary experiment POLARBEAR2

Primary author

Kaori Hattori (High Energy Acceleration Research Organization)


Adnan Ghribi (University of California, Berkeley) Adrian Lee (University of California, Berkeley) Akie Shimizu (The Graduate University for Advanced Studies) Aritoki Suzuki (University of California, Berkeley) Brian Keating (University of California, San Diego) Christian Reichardt (University of California, Berkeley) Colin Ross (Dalhousie University) Darcy Barron (University of California, San Diego) Darin Rosen (University of California, Berkeley) Erin Quealy (University of California, Berkeley) Frederick Matsuda (University of California, San Diego) Giullo Fabbian (Laboratoire Astroparticule et Cosmologie (APC), Universite Paris 7) Haruki Nishino (University of California, Berkeley) Hideki Morii (High Energy Accelerator Research Organization (KEK)) Josquin Errard (Lawrence Berkeley National Laboratory) Julian Borrill (Lawrence Berkeley National Laboratory) Jun-ichi Suzuki (High Energy Accelerator Research Organization (KEK)) Kam Arnold (University of California, Berkeley) Ken-ichi Tanaka (High Energy Accelerator Research Organization (KEK)) Masashi Hazumi (KEK) Masaya Hasegawa (High Energy Accelerator Research Organization (KEK)) Matt Dobbs (McGill University) Michael Myers (University of California, Berkeley) Nathan Stebor (University of California, San Diego) Nicholas Harrington (University of California, Berkeley) Nils Halverson (University of Colorado) Nobuhiro Kimura (High Energy Accelerator Research Organization (KEK)) Oliver Zahn (Lawrence Berkeley National Laboratory) Paul Richards (University of California, Berkeley) Peter Ade (Cardiff University) Praween Siritanasak (University of California, San Diego) Radek Stompor (Laboratoire Astroparticule et Cosmologie (APC), Universite Paris 7) Scott Chapman (Dalhousie University) Sou Ishii (University of Tsukuba) Takada Suguru (University of Tsukuba) Takahiro Okamura (High Energy Accelerator Research Organization (KEK)) Takayuki Tomaru (High Energy Accelerator Research Organization (KEK)) Theodore Kisner (Lawrence Berkeley National Laboratory) Tomotake Matsumura (High Energy Accelerator Research Organization (KEK)) William Grainger (Cardiff University) William Holzapfel (University of California, Berkeley) William Kranz (University of California, Berkeley) Yuji Chinone (High Energy Accelerator Research Organization (KEK)) Yuki Inoue (The Graduate University for Advanced Studies) Yuta Kaneko (University of Tokyo) Zigmund Kermish (University of California, Berkeley)

Presentation Materials