This conference presentation was prepared for the Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI conference at SPIE Astronomical Telescopes + Instrumentation, 2022.
This conference presentation was prepared for the Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI conference at SPIE Astronomical Telescopes + Instrumentation, 2022.
This conference presentation was prepared for the Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI conference at SPIE Astronomical Telescopes + Instrumentation, 2022.
This conference presentation was prepared for the Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI conference at SPIE Astronomical Telescopes + Instrumentation, 2022.
KEYWORDS: Telescopes, Receivers, Observatories, Holography, Near field, Diffraction, Systems modeling, Statistical analysis, Radio propagation, Particles
This conference presentation was prepared for the Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI conference at SPIE Astronomical Telescopes + Instrumentation, 2022.
Microwave absorbers are commonly used as neutral density filters to enable sensitive detectors which saturate with room temperature loads to be characterized in the laboratory setting. We present transmission and reflection measurements of two types of machinable magnetically loaded cured epoxies (Eccosorb MF-112 and MF-114) in millimeter to sub-millimeter wavelengths at room and cryogenic temperatures. These measurements are made using an ultra broadband coherent source (reflection from 30-500 GHz at 300K and transmission from 30-300GHz at 300 and 77K) and a Fourier Transform Spectrometer (70-170 GHz at 4K). We present the dielectric properties of these materials and catalog the differences between presently available machinable samples and commonly cited epoxy-based samples.
The Simons Observatory (SO) will be a CMB survey experiment with three small-aperture telescopes and one large-aperture telescope (the LAT), which will observe from the Atacama Desert in Chile. In total, SO will field over 60,000 TES bolometers in six spectral bands centered between 27 and 280 GHz. The 6 m LAT, targeting the smaller angular scales of the CMB, utilizes a cryogenic receiver (LATR) designed to house up to 13 individual optics tubes. The scientific objectives of the SO project requires these optics tubes to achieve high-throughput optical performance while maintaining exquisite control of systematic effects. We describe the integration and testing program for the LATR optics tubes being carried out to verify the design and assembly of the tubes before deployment. The program includes a quick turn-around single tube test cryostat. We discuss the optical design specifications the tubes for deployment and the suite of optical test equipment prepared for these measurements.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.