Author/Authors :
Monica and La Monaca، نويسنده , , A. and Costa، نويسنده , , E. and Soffitta، نويسنده , , P. and Di Persio، نويسنده , , G. and Manzan، نويسنده , , M. and Martino، نويسنده , , B. and Patria، نويسنده , , G. and Cappuccio، نويسنده , , G. and Zema، نويسنده , , N.، نويسنده ,
Abstract :
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.
Keywords :
X-ray high-energy astronomy , Scintillation gas , Back-illuminated CCD , Imaging detector , Polarimetry
