A NEW PHOTOELECTRON IMAGER FOR X-RAY ASTRONOMICAL POLARIMETRY

Authors
LAMONACA A COSTA E SOFFITTA P DIPERSIO G MANZAN M MARTINO B PATRIA G CAPPUCCIO G ZEMA N
Citation
A. Lamonaca et al., A NEW PHOTOELECTRON IMAGER FOR X-RAY ASTRONOMICAL POLARIMETRY, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 416(2-3), 1998, pp. 267-277
Citations number
28
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
416
Issue
2-3
Year of publication
1998
Pages
267 - 277
Database
ISI
SICI code
0168-9002(1998)416:2-3<267:ANPIFX>2.0.ZU;2-Y
Abstract
A new photoelectron imager for X-ray astronomical polarimetry (PIAP) h as been developed and tested at the Frascati laboratories (LNF-INFN). A charge-coupled device (CCD) is placed on one of the two conjugate fo ci of a Cassegrain reflective optics onto which are focused UV photons emitted by means of gas scintillation. This X-ray detector has been b uilt to image the angular distribution of the photoelectron tracks, wh ose anisotropy measures the X-ray polarization. First tests, performed by using mixtures based on argon gas and benzene at low pressure, sho w events which are candidate tracks of photoelectrons and Auger electr ons produced by a Fe-55 source. (C) 1998 Elsevier Science B.V. All rig hts reserved.