Shaul Hanany

Wideband (sub)millimeter observations of the galaxy cluster RX J1347.5-1145 with DESHIMA 2.0

Arend Moerman, Akira Endo, Stefanie Brackenhoff, Shinji Fujita et autres

We report on wideband (sub)millimeter observations of the galaxy cluster RX J1347.5-1145 with the DESHIMA 2.0 instrument, during its commissioning and science verification campaign at the ASTE 10-meter telescope in 2024. DESHIMA 2.0 is an on-chip spectrometer, operating between 200-400 GHz with …

nl, jp, se, us, es, de (code pays fourni par la source)

Silicon-based vacuum window for millimeter- and submillimeter-wave astrophysics

Ryota Takaku, Scott Cray, Kosuke Aizawa, Akira Endo et autres

We designed, fabricated, and characterized the properties of a silicon-based vacuum window suitable for millimeter-wave astrophysical applications. The window, which has a diameter of 124 mm, an optically usable diameter of 68 mm, and a thickness of about 4 mm, gives an …

us, jp, nl, de (code pays fourni par la source)

Laser-ablated sub-wavelength structure anti-reflection coating on an alumina lens

Shaul Hanany, Scott Cray, Samuel Dietterich, Jan Friedrich Düsing et autres

We used laser ablation to fabricate a sub-wavelength structure anti-reflection coating (SWS-ARC) on a 5-cm-diameter alumina lens. With a design aspect ratio height/pitch of 2.5, the SWS-ARC gives a calculated average reflectance of 1.3% between 110 and 290 GHz. Sub-wavelength structure shape …

us, de, jp (code pays fourni par la source)

Prototype sub-wavelength structure anti-reflection coating on alumina filters for ground-based CMB telescopes

Kosuke Aizawa, Ryosuke Akizawa, Scott Cray, Shaul Hanany et autres

International audience

jp (code pays fourni par la source)

A 350 GHz array of LEKIDs for balloon-borne CMB observations

F. Cacciotti, A. Paiella, Camille Avestruz, R. Basu Tackur et autres

We present the design, optimization and laboratory characterization of an array of Lumped Element Kinetic Inductance Detectors sensitive in a frequency band centered at 350 GHz. The array consists of 313 feed-horn coupled pixels with resonant frequencies spread over 250 MHz. We …

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DESHIMA 2.0 on ASTE: commissioning and science verification of an ultra-wideband integrated superconducting spectrometer

Akira Endo, K. Karatsu, Tatsuya Takekoshi, Yoichi Tamura et autres

We present the on-sky commissioning and science verification of DESHIMA 2.0: the first science-grade integrated superconducting spectrometer (ISS) for ultra-wideband mm-submm spectroscopy. With an instantaneous band coverage of 205-392 GHz at a spectral resolution of F/dF = 500, DESHIMA 2.0 will be …

nl, jp, se (code pays fourni par la source)

Laser ablated subwavelength structure antireflection coating on an alumina lens

Shaul Hanany, Scott Cray, Jan Friedrich Düsing, Calvin Firth et autres

We used laser ablation to fabricate sub-wavelength structure anti-reflection coating (SWS-ARC) on a 5 cm diameter alumina lens. With an aspect ratio of 2.5, the SWS-ARC are designed to give a broad-band low reflectance response between 110 and 290 GHz. SWS shape …

us, de, jp (code pays fourni par la source)

3D printed alumina as a millimeter-wave optical element

Rex Lam, Scott Cray, Calvin Firth, Shaul Hanany et autres

We present transmission and loss measurements of 3D printed alumina and reflectance measurement of a sample with 3D printed sub-wavelength structures anti-reflection coatings (SWS-ARC). For a band between 160 and 700 GHz we find an index of refraction n = 3.11 ± …

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DESHIMA 2.0: full system evaluation of the ultra-wideband integrated superconducting spectrometer in laboratory

K. Karatsu, Akira Endo, Arend Moerman, S. J. C. Yates et autres

nl, es, us, jp (code pays fourni par la source)

Demonstration of IR absorptive filter using alumina with laser ablated sub-wavelength structure for millimeter-wave alumina filters

Kosuke Aizawa, Ryosuke Akizawa, Scott Cray, Shaul Hanany et autres

We present designs and fabrications of sub-wavelength anti-reflection structures on alumina for infrared filters at three observational frequency bands near 30, 125, and 250 GHz, which are widely used for instruments measuring cosmic microwave background (CMB) radiation from the ground. The three …

jp, us (code pays fourni par la source)

Performance of a 200 mm Diameter Achromatic HWP with Laser-Ablated Sub-Wavelength Structures

Ryota Takaku, T. Ghigna, Shaul Hanany, Yurika Hoshino et autres

jp, us (code pays fourni par la source)

Constraints on the Optical Depth to Reionization from Balloon-borne Cosmic Microwave Background Measurements

Josquin Errard, Mathieu Remazeilles, J. Aumont, Jacques Delabrouille et autres

Abstract We assess the uncertainty with which a balloon-borne experiment, nominally called Tau Surveyor (τS), can measure the optical depth to reionization σ(τ) with given realistic constraints of instrument noise and foreground emissions. Using a τS fiducial design with six frequency bands …

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