A new photoelectron imager for X-ray astronomical polarimetry.

Details A new photoelectron imager for X-ray astronomical polarimetry. A new photoelectron imager for X-ray astronomical polarimetry.

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998nimpa.416..267l&link_type=abstract

Nuclear Instruments and Methods in Physics Research, Sect. A, Vol. 416, No. 2 - 3, p. 267 - 277

Astronomy and Astrophysics

Astronomy

3

X-Ray Astronomy: Polarimeters

Scientific paper

A new photoelectron imager for X-ray astronomical polarimetry (PIAP) has been developed and tested at the Frascati laboratories (LNF-INFN). A charge-coupled device (CCD) is placed on one of the two conjugate foci of a Cassegrain reflective optics onto which are focused UV photons emitted by means of gas scintillation. This X-ray detector has been built to image the angular distribution of the photoelectron tracks, whose anisotropy measures the X-ray polarization. First tests, performed by using mixtures based on argon gas and benzene at low pressure, show events which are candidate tracks of photoelectrons and Auger electrons produced by a 55Fe source.

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