Architectures and assessment of next-generation CMB polarization instruments

Metadata Updated: November 12, 2020

Cosmological inflation predicts a background of gravitational waves that imprint a characteristic polarized pattern on the CMB. This signal is degraded by "foreground" emission from our galaxy, and by non-ideal aspects of the instrument. Future missions must be motivated by end-to-end pipelines that include systematics and sophisticated representations of astrophysical foregrounds and cleaning. We plan to write a pipeline that will quickly close the loop between design choices and projected scientific outcomes. The curl-like component of the polarization field, or “B-mode” is the primary target of the next generation of cosmic microwave background polarization experiments. B-modes can be sourced by gravitational waves produced during cosmological inflation, subsequent gravitational lensing of CMB polarization, or by astrophysical “foreground” polarized emission. The inflationary component of the B-modes is of greatest scientific interest because it would reflect energy scales and physics significantly beyond the reach of terrestrial accelerators. To secure a clear statement on inflation as the correct interpretation, the other sources of B-modes must be cleanly removed or ruled out. The new experimental burden is now not on detecting B-modes but showing convincingly that they are inflationary.Basic decisions about focal plane arrangements, optical design, frequency bands, sensitivity, and survey strategy all interact and drive mission costs. There is not a simple analytic expression relating design parameters to scientific output. Instead, these questions must be addressed using an end-to-end simulation that can quickly close the loop and evaluate design decisions.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_17362
Data First Published 2015-09-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash 79f902191c7ffa5b00218d9b59381fe909ff4fd7
Source Schema Version 1.1

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