Development of Superconducting Magnetic Heat Switches for an Ideal Integrating Bolometer

Nagler, Peter C.; Canavan, Edgar R.; Alba, Roberto De; Stevenson, Thomas

doi:10.1007/s10909-015-1365-z

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Extension of the detector design techniques employed for calorimetry [98][99][100][101] provide a viable path to address this instrumentation need. Mitigating cosmic rays is one particular advantage of a device known as the ideal integrating bolometer (IIB), [102][103][104][105] which combines leg isolation (diffusive, ballistic, or phononic) with a switchable thermal short. Upon an upset (e.g., cosmic ray hit), the device can be reset quickly to mitigate the data losses that Planck experienced.…”

Section: Susceptibility To Cosmic Raysmentioning

confidence: 99%

Transition-edge sensor detectors for the Origins Space Telescope

Nagler

Sadleir

Wollack

2021

J. Astron. Telesc. Instrum. Syst.

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The Origins Space Telescope is one of four flagship missions under study for the 2020 Astrophysics Decadal Survey. With a 5.9-m cold (4.5 K) telescope deployed from space, Origins promises unprecedented sensitivity in the near-, mid-, and far-infrared from 2.8 to 588 μm. This mandates the use of ultrasensitive and stable detectors in all of the Origins instruments. At the present, no known detectors can meet Origins' stability requirements in the near-to mid-infrared or its sensitivity requirements in the far-infrared. We discuss the applicability of transition-edge sensors, as both calorimeters and bolometers, to meet these requirements, and lay out a path toward improving the present state-of-the-art. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Susceptibility To Cosmic Raysmentioning

confidence: 99%

Transition-edge sensor detectors for the Origins Space Telescope

Nagler

Sadleir

Wollack

2021

J. Astron. Telesc. Instrum. Syst.

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Demonstration of a Pixel-Scale Superconducting Heat Switch for an Ideal Integrating Bolometer

Canavan

Stevenson

Nagler

et al. 2017

IEEE Trans. Appl. Supercond.

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Development of a Superconducting Heat Switch for an Ideal Integrating Bolometer

Mok

2017

Proc. Wisc. Space Conf.

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Improving the sensitivity of current state-of-the-art bolometers is essential for future cosmology endeavors. Having a bolometer that is thermally isolated from its thermal sink is ideal in order to reduce phonon noise: the factor limiting bolometer sensitivity. To thermally isolate a bolometer as much as possible a pixel-scale superconducting heat switch is being developed to control the conductance between a bolometer and its thermal sink. The heat switch is comprised of a superconducting thin aluminum film surrounded by a niobium coil. Current is passed through the coil and the resulting magnetic field drives the aluminum into its high conductance normal state. Experimental data agrees well with the results of a thermal model of the device. IntroductionThe constant technological advancement of satellite-based detectors has helped discover much of what humanity knows about distant galaxies and how our universe evolved. Cooled to temperatures well below 1 K to optimize performance and greatly increase sensitivity, a bolometer measures the temperature rise of an optical absorber due to incident far-infrared radiation. To cool the absorber back down, a thermal strap of constant conductance is connected to a thermal reservoir held at a constant temperature (<1 K). The sensitivity of the bolometer is limited by phonon noise, also known as thermal fluctuation noise, which arises from the random exchange of energy between a thermal mass and its environment. The Noise Equivalent Power (NEP) of the device, caused by phon noise, is given by 4(k B T 2 G)

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Development of Superconducting Magnetic Heat Switches for an Ideal Integrating Bolometer

Cited by 3 publications

References 11 publications

Transition-edge sensor detectors for the Origins Space Telescope

Transition-edge sensor detectors for the Origins Space Telescope

Demonstration of a Pixel-Scale Superconducting Heat Switch for an Ideal Integrating Bolometer

Development of a Superconducting Heat Switch for an Ideal Integrating Bolometer

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