Design Evolution of the Spiderweb TES Bolometer for Cosmology Applications

Westbrook, Ben; Lee, A.; Meng, Xiaofan; Suzuki, Aritoki; Arnold, K.; Shirokoff, E.; George, E. M.; Aubin, F.; Dobbs, M.; MacDermid, Kevin; Hanany, Shaul; Raach, Kate; Aboobaker, Asad M.; Hubmayr, J.; Oshima, Tai; Kawamura, Masanori; Kohno, Kotaro

doi:10.1007/s10909-012-0528-4

Cited by 17 publications

(14 citation statements)

References 5 publications

(10 reference statements)

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“…It is a bilayer of aluminium and titanium where the thickness of the aluminium was tuned to set the critical temperature via the proximity effect. 9 The bolometers are not inherently polarization sensitive but are preceded by a continuously rotating broadband half-wave plate and polarizing beam splitter, which splits the incoming light, sending one linear polarization to each focal plane. The spectral band of each bolometer wafer is set by low-pass metal mesh filters and waveguides for each pixel as high pass filters.…”

Section: Bolometer Arraymentioning

confidence: 99%

The performance of the bolometer array and readout system during the 2012/2013 flight of the E and B experiment (EBEX)

et al. 2014

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EBEX is a balloon-borne telescope designed to measure the polarization of the cosmic microwave background radiation. During its eleven day science flight in the Austral Summer of 2012, it operated 955 spider-web transition edge sensor (TES) bolometers separated into bands at 150, 250 and 410 GHz. This is the first time that an array of TES bolometers has been used on a balloon platform to conduct science observations. Polarization sensitivity was provided by a wire grid and continuously rotating half-wave plate. The balloon implementation of the bolometer array and readout electronics presented unique development requirements. Here we present an outline of the readout system, the remote tuning of the bolometers and Superconducting QUantum Interference Device (SQUID) amplifiers, and preliminary current noise of the bolometer array and readout system.

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Section: Bolometer Arraymentioning

confidence: 99%

The performance of the bolometer array and readout system during the 2012/2013 flight of the E and B experiment (EBEX)

et al. 2014

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“…Several groups, including UC Berkeley, NIST, ANL, GSFC and Caltech/JPL are now fielding innovative and complementary array technologies that provide the sensitivity, frequency coverage and control of systematics required to realize the scientific potential of CMB polarization (Hubmayr et al 2012, McMahon et al 2012, George et al 2012, Westbrook et al 2012, Aubin et al 2010. EBEX and Spider represent the near future of Antarctic LDB CMB experiments.…”

Section: Cmb Polarizationmentioning

confidence: 99%

Precision CMB Measurements from Long Duration Stratospheric Balloons: Towards B-modes and Inflation

Jones

2012

Proc. IAU

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Abstract.Observations of the Cosmic Microwave Background (CMB) have played a leading role in establishing an understanding of the structure and evolution of the Universe on the largest scales. This achievement has been enabled by a series of extremely successful experiments, coupled with the simplicity of the relationship between the cosmological theory and data. Antarctic experiments, including both balloon-borne telescopes and instruments at the South Pole, have played a key role in realizing the scientific potential of the CMB, from the characterization of the temperature anisotropies to the detection and study of the polarized component. Current and planned Antarctic long duration balloon experiments will extend this heritage of discovery to test theories of cosmic genesis through sensitive polarized surveys of the millimeter-wavelength sky. In this paper we will review the pivotal role that Antarctic balloon borne experiments have played in transforming our understanding of the Universe, and describe the scientific goals and technical approach of current and future missions.

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“…Several other publications give additional details about the EBEX experiment. Some are from earlier stages of the program (Oxley et al 2004;Grainger et al 2008;Aubin et al 2010;Milligan et al 2010;Reichborn-Kjennerud et al 2010;Klein et al 2011;Sagiv et al 2012;Westbrook et al 2012), and others discuss some subsystems in more detail (Polsgrove 2009;Reichborn-Kjennerud 2010;Sagiv 2011;Aubin 2012;MacDermid 2014;MacDermid et al 2014;Westbrook 2014;Zilic 2014;Chapman 2015;Chapman et al 2015;Didier et al 2015;Aubin et al 2016;Didier 2016).…”

Section: Introductionmentioning

confidence: 99%

The EBEX Balloon-borne Experiment—Optics, Receiver, and Polarimetry

Aboobaker

Ade

Araujo

et al. 2018

ApJS

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The E and B Experiment (EBEX) was a long-duration balloon-borne cosmic microwave background (CMB) polarimeter that flew over Antarctica in 2012. We describe the experiment's optical system, receiver, and polarimetric approach and report on their in-flight performance. EBEX had three frequency bands centered on 150, 250, and 410GHz. To make efficient use of limited mass and space, we designed a 115cm 2 sr highthroughput optical system that had two ambient temperature mirrors and four antireflection-coated polyethylene lenses per focal plane. All frequency bands shared the same optical train. Polarimetry was achieved with a continuously rotating achromatic half-wave plate (AHWP) that was levitated with a superconducting magnetic bearing (SMB). This is the first use of an SMB in astrophysics. Rotation stability was 0.45% over a period of 10 hr, and angular position accuracy was 0°. 01. The measured modulation efficiency was above 90% for all bands. To our knowledge the 109% fractional bandwidth of the AHWP was the broadest implemented to date. The receiver, composed of one lens and the AHWP at a temperature of 4K, the polarizing grid and other lenses at 1K, and the two focal planes at 0.25K, performed according to specifications, giving focal plane temperature stability with a fluctuation power spectrum that had a 1/f knee at 2mHz. EBEX was the first balloon-borne instrument to implement technologies characteristic of modern CMB polarimeters, including high-throughput optical systems, and large arrays of transition edge sensor bolometric detectors with multiplexed readouts.

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Design Evolution of the Spiderweb TES Bolometer for Cosmology Applications

Cited by 17 publications

References 5 publications

The performance of the bolometer array and readout system during the 2012/2013 flight of the E and B experiment (EBEX)

The performance of the bolometer array and readout system during the 2012/2013 flight of the E and B experiment (EBEX)

Precision CMB Measurements from Long Duration Stratospheric Balloons: Towards B-modes and Inflation

The EBEX Balloon-borne Experiment—Optics, Receiver, and Polarimetry

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