Justin Mathewson

Cryogenic high linearity and dynamic range, C-band low noise amplifier for uMUX TES and CMB readout systems

Justin Mathewson, Eric R. Weeks, Rick Scott, Kaiwen Zheng et autres

We describe a two-stage cryogenic low noise amplifier (LNA) with a usable frequency range of 0.5 to 8 GHz (L to C-band) designed for operation at 4 Kelvin. The amplifier was designed to have high linearity and dynamic range with a low …

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A customizable, five-stage, intermediate frequency, low noise amplifier and readout chain for the Astrophysics Stratospheric Telescope for High-spectral Resolution Observations at Submillimeter-wavelengths (ASTHROS)

Justin Mathewson, Ricardo López Rodríguez, Eric Weeks, Paul A. Horton et autres

Atmospheric interference, noise, and attenuation are a few limitations that arise when observing emissions of sub-millimeter wavelengths using ground-based telescopes. On-going research conducted on high-altitude balloons allow a new direction in observing these distributed emissions and eliminates all possible atmospheric interference. All …

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Development and performance of Universal Readout Harnesses for the Simons Observatory

Jenna E. Moore, Tanay Bhandarkar, Brooke DiGia, Cody J. Duell et autres

The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that consists of three 0.5 m small-aperture telescopes and one 6 m large-aperture telescope, sited at an elevation of 5200 m in the Atacama Desert in Chile. SO will …

Development and performance of universal readout harness for the Simons Observatory

Jenna Moore, Tanay Bhandarkar, Brooke DiGia, Cody J. Duell et autres

The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) survey experiment that consists of three 0.5 m small-aperture telescopes and one 6 m large-aperture telescope, sited at an elevation of 5200 m in the Atacama Desert in Chile. SO will …

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Current Status of the Ali CMB Polarization Telescope Focal Plane Camera

Maria Salatino, Jason Austermann, Jeremy Meinke, Adrian K. Sinclair et autres

Ali CMB Polarization Telescope (AliCPT) is the first Cosmic Microwave Background (CMB) polarimeter with a large focal plane camera to be deployed in the Northern Hemisphere, in the Tibetan Plateau. Here we present the design of a dichroic (90/150 GHz) focal plane …

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Simons Observatory Microwave SQUID Multiplexing Readout: Cryogenic RF Amplifier and Coaxial Chain Design

Mayuri Sathyanarayana Rao, Maximiliano Silva-Feaver, Aamir Ali, Kam Arnold et autres

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The terahertz intensity mapper (TIM): Far-infrared balloon mission for spectroscopic galaxy evolution studies

R. M. J. Janssen, James Aguirre, Peter S. Barry, J. S. Bracks et autres

Understanding the formation and evolution of galaxies over cosmic time is one of the foremost goals of astrophysics and cosmology today. The cosmic star formation rate has undergone a dramatic evolution over the course of the last 14 billion years, and dust …

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IF system design for the Galactic/Extragalactic ULDB Spectroscopic Terahertz Observatory (GUSTO)

Marko Neric, Christopher Groppi, Hamdi Mani, Justin Mathewson et autres

We present the design, and prototype phases of the intermediate frequency (IF) system for the upcoming balloon borne observatory, Galactic/Extragalactic Ultra-Long Duration Balloon (ULDB) Spectroscopic Terahertz Ob- servatory (GUSTO). GUSTO is a multi-organizational project whose goal is to address several key unanswered …

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The TolTEC project: a millimeter wavelength imaging polarimeter (Conference Presentation)

G. W. Wilson, Peter A. R. Ade, I. Aretxaga, Jason E. Austermann et autres

The mm-wavelength sky reveals the initial phase of structure formation, at all spatial scales, over the entire observable history of the Universe. Over the past 20 years, advances in mm-wavelength detectors and camera systems have allowed the field to take enormous strides …

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Echocardiographic determinants of successful balloon dilation in pulmonary atresia with intact ventricular septum

Abdenasser Drighil, Mansour Al-Jufan, Afef Slimi, S. Yamani et autres

AIMS: Pulmonary atresia with intact ventricular septum (PA-IVS) is a complex congenital heart malformation with multitude therapeutic approaches. Recently, balloon valvotomy has been used as an alternative to primary surgery. This study aimed to identify echocardiographic markers of balloon dilation success in …

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