Photoemission polarimeter in soft X-ray astronomy

Details Photoemission polarimeter in soft X-ray astronomy Photoemission polarimeter in soft X-ray astronomy

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990opten..29..959f&link_type=abstract

Optical Engineering (ISSN 0091-3286), vol. 29, Aug. 1990, p. 959-967.

Astronomy and Astrophysics

Astronomy

1

Polarimeters, Polarization (Waves), Spaceborne Astronomy, X Ray Telescopes, Cesium Iodides, Photoelectric Emission, Quantum Efficiency, Spaceborne Telescopes

Scientific paper

The fundamental understanding of the X-ray photoeffect is presently considered in view of laboratory measurements indicating that the pulse quantum yield of CsI X-ray photocathodes near grazing incidence depends on the incident beam's linear polarization state. Attention is given to the practical accommodation of a photoemission polarimeter at or near the focus of a satellite X-ray telescope, with a view to the Composite X-ray polarimeter envisioned for ESA's High Throughput Spectroscopy Mission. The sensitivity of this instrument is projected in light of intrinsic device-format, instrumental polarization, and data-compression problems. Recent experimental results bearing on variations in the number of X-ray photoelectrons with polarimetric azimuth on a CsI cathode are presented.

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