| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Wollack, Edward
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2022Plasma based production of AlF<SUB>3</SUB>-passivated aluminum mirrors for UVOIR astronomycitations
- 2022Characterization of aerogel scattering filters for astronomical telescopes
- 2022Testing CMB Anomalies in E-mode Polarization with Current and Future Data
- 2021Process for fabricating one or more ultra-large area nanoscale polymer films
- 2021Fabricating ultra-thin structured polymer films
- 2021The Simons Observatory: metamaterial microwave absorber and its cryogenic applications.citations
- 2020The CLASS 150/220 GHz Polarimeter Array: Design, Assembly, and Characterizationcitations
- 2019Low-Loss Microstrip Transmission Line Fabricated with Improved Liftoff Process
- 2018Modeling Strategies for Superconducting Microstrip Transmission Line Structurescitations
- 2017Superconducting Vacuum-Gap Crossovers for High Performance Microwave Applicationscitations
- 2016Superconducting Vacuum-Gap Crossovers for High Performance Microwave Applications
- 2016Wide-stopband aperiodic phononic filterscitations
- 2016Silicon-Based Antenna-Coupled Polarization-Sensitive Millimeter-Wave Bolometer Arrays for Cosmic Microwave Background Instrumentscitations
- 2014A Cryogenic Infrared Calibration Targetcitations
- 2008Compact Low-Loss Planar Magic-T
- 2007Electromagnetic and Thermal Properties of a Conductively Loaded Epoxycitations
- 2005Ultra-Compact Broadband High-Spurious Suppression Bandpass Filter Using Double Split-end Stepped Impedance Resonators
Places of action
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article
The Simons Observatory: metamaterial microwave absorber and its cryogenic applications.
Abstract
Controlling stray light at millimeter wavelengths requires special optical design and selection of absorptive materials that should be compatible with cryogenic operating environments. While a wide selection of absorptive materials exists, these typically exhibit high indices of refraction and reflect/scatter a significant fraction of light before absorption. For many lower index materials such as commercial microwave absorbers, their applications in cryogenic environments are challenging. In this paper, we present a new tool to control stray light: metamaterial microwave absorber tiles. These tiles comprise an outer metamaterial layer that approximates a lossy gradient index anti-reflection coating. They are fabricated via injection molding commercially available carbon-loaded polyurethane (25% by mass). The injection molding technology enables mass production at low cost. The design of these tiles is presented, along with thermal tests to 1 K. Room temperature optical measurements verify their control of reflectance to less than 1% up to 65∘ angles of incidence, and control of wide angle scattering below 0.01%. The dielectric properties of the bulk carbon-loaded material used in the tiles is also measured at different temperatures, confirming that the material maintains similar dielectric properties down to 3 K.