Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session K21: Inflation Probe SIG MinisymposiumLive
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Sponsoring Units: DAP Chair: Kevin Huffenberger, Florida State University |
Sunday, April 18, 2021 1:30PM - 1:37PM Live |
K21.00001: The Inflation Probe SIG Graça Rocha I will give updates on the Inflation Probe SIG and discuss them with the community. Please refer to the Physics of the Cosmos page for additional details [https://pcos.gsfc.nasa.gov/physpag/meetings/APS_2021/APS2021-agenda.php#ipsig] [Preview Abstract] |
Sunday, April 18, 2021 1:37PM - 1:53PM Live |
K21.00002: Science Reach of PICO - a New, Probe-Class CMB Space Mission Shaul Hanany With only 13,000 detectors implemented on a single platform in space, PICO's science reach is extraordinarily broad and exceeds that of other CMB projects planned for the next decade at angular scales larger than ~5 arcminutes. The combination of broad frequency coverage between 21 and 800 GHz, systematics control achievable with the superb thermal stability attainable at L2, and low noise make PICO an optimal platform in terms of optimizing science for cost. I will present the mission, its transformative science, and the path for implementation [Preview Abstract] |
Sunday, April 18, 2021 1:53PM - 2:09PM Live |
K21.00003: LiteBIRD overview Adrian Lee TBD [Preview Abstract] |
Sunday, April 18, 2021 2:09PM - 2:25PM Live |
K21.00004: The Primordial Inflation Polarization Explorer (PIPER): Testing Inflation on Large Angular Scales Al Kogut The Primordial Inflation Polarization Explorer (PIPER) is a balloon-borne instrument optimized to measure the polarization of the Cosmic Microwave Background (CMB) at large angular scales, where the inflationary signature cleanly separates from the cosmological foreground induced by gravitational lensing. PIPER consists two co-aligned telescopes cooled to 1.7 K within a large liquid helium bucket dewar. A variable-delay polarization modulator (VPM) on each telescope chops between linear and circular polarization to isolate the polarized signal while rejecting the much brighter unpolarized emission. A pair of $32 \times 40$ element detector arrays provide background-limited sensitivity at detector loading comparable to proposed space missions. A series of conventional balloon flights from mid-latitude sites will map 95\% of the sky at frequencies 200, 270, 350, and 600 GHz to measure the primordial tensor-to-scalar ratio to limit $r < 0.007$ at 95\% confidence. We discuss the scientific goals and current status of the PIPER mission [Preview Abstract] |
Sunday, April 18, 2021 2:25PM - 2:41PM Live |
K21.00005: The First Flight of SPIDER: Probing Inflation from the Stratosphere Jeff Filippini Inflation is thought to have seeded the cosmos with a hum of primordial gravitational waves, which should have left a unique "B-mode" signature on the polarization of the cosmic microwave background. SPIDER is a powerful balloon-borne instrument designed to tease out this polarization pattern in the presence of obscuring Galactic foregrounds. SPIDER is also a pathfinder for Inflation Probe, deploying critical technologies in a space-like environment. I will present instrument performance and science results from SPIDER's successful long-duration balloon flight over the Antarctic ice, including constraints on primordial B-modes. [Preview Abstract] |
Sunday, April 18, 2021 2:41PM - 2:46PM |
K21.00006: Panel Discussion . [Preview Abstract] |
Sunday, April 18, 2021 2:46PM - 2:53PM Live |
K21.00007: Forecasts on foregrounds removal and CMB B-mode recovery with the probe-class mission concept PICO Mathieu Remazeille PICO is a probe-class CMB space mission that NASA studied and presented to the US Astro2020 Decadal Panel as a candidate next generation CMB mission. It is designed to observe the entire sky through 21 frequency bands ranging from 20 to 800 GHz. I will report on PICO collaboration's activities concerning foregrounds and present our forecast on foreground subtraction and recovery of the CMB B-mode polarization signal and tensor-to- scalar. [Preview Abstract] |
Sunday, April 18, 2021 2:53PM - 3:00PM Live |
K21.00008: The Primordial Inflation Polarization Explorer (PIPER): Characterization of the Receiver and Detector Arrays Rahul Datta The Primordial Inflation Polarization Explorer (PIPER) is a balloon-borne instrument that will probe the epoch of reionization and search for the signature of inflation through large angular scale measurements of the linear polarization of the cosmic microwave background in four frequency bands from 200 to 600 GHz. PIPER consists of co-pointed twin cryogenic telescopes operating in an open liquid helium bucket dewar. The sky is imaged on to two 32x40 pixel arrays of transition-edge sensors (TES) operating at a bath temperature of 100 mK to achieve background-limited sensitivity. Each kilopixel array is indium-bump-bonded to a superconducting quantum interference device (SQUID) time-domain multiplexer (MUX) chip and read out by warm electronics. Each pixel measures total incident power over a frequency band defined by bandpass filters in front of the array, while polarization sensitivity is provided by the upstream Variable-delay Polarization Modulators (VPMs) and analyzer grids. We will present measurements of detector parameters and preflight characterization of the receiver and detector arrays. [Preview Abstract] |
Sunday, April 18, 2021 3:00PM - 3:07PM Live |
K21.00009: Foreground Component Separation for SPIDER's Primordial B-mode Constraint Johanna Nagy Separating polarized Galactic foreground signals from the cosmic microwave background is a significant challenge for current and future experiments searching for evidence of primordial gravitational waves. In this talk I will review the two component separation techniques used for SPIDER's primordial B-mode constraint from the 2015 flight data. One method uses a template derived from Planck data to subtract the Galactic dust signal from the maps, while the other employs a joint analysis of SPIDER and Planck data in the harmonic domain. Together these two independent techniques probe the sensitivity of the cosmological result to the assumptions made by each [Preview Abstract] |
Sunday, April 18, 2021 3:07PM - 3:14PM Live |
K21.00010: LiteBIRD related TBD TBD TBD [Preview Abstract] |
Sunday, April 18, 2021 3:14PM - 3:18PM |
K21.00011: Panel Discussion . [Preview Abstract] |
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