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Hard X-ray Photoelectric Polarimeter

Metadata Updated: November 12, 2020

Our objective is to determine the gas mixtures and pressures that would enable a sensitive, hard X-ray polarimeter using existing flight components with the goal of making astrophysical measurements using the InFOCμS hard X-ray optics on a long duration balloon flight (future proposal following successful demonstration). Photoelectric allows high sensitivity, low systematics polarization measurements, and photoelectric absorption remains the dominant interaction at energies up to 50-100 keV for many intermediate Z absorbers (Figure 1).  NASA and GSFC have made substantial investments in the Time Projection Chamber polarimeter proposed for GEMS and PRAXyS. As PRAXyS was ultimately not selected for flight development, we propose to capture the investment and modify the PRAXyS proto-flight detectors to operate from ~10-50 keV using an Argon based mixture as the active gas.  The broad outline is to measure the characteristics of Argon based mixtures, retrofit the PRAXyS detectors for high pressure operation, and prepare for a balloon flight using the InFocus balloon payload to pave the way to a dedicated mission. 

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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_93229
Data First Published 2018-09-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id c4bb3f85-0435-42e4-bc3a-7bbb92c3a6d8
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash 58a971614af284329c2b47e81538f5391487a29f
Source Schema Version 1.1

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