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Journal of Instrumentation Volume 4 November 2009 Create an alert RSS this journal

F Muleri et al 2009 JINST 4 P11002 doi:10.1088/1748-0221/4/11/P11002

X-ray polarimetry in astrophysics with the Gas Pixel Detector

OPEN ACCESS 1st International Conference on Micro-Pattern Gaseous Detectors (MPGD2009)

F Muleria, R Bellazzinib, A Brezb, E Costaa, F Lazzarottoa, M Minutib, M Pincherab, A Rubinia, P Soffittaa and G Spandreb

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Abstract References Cited By

Part of 1st International Conference on Micro-Pattern Gaseous Detectors (MPGD2009)

The Gas Pixel Detector, recently developed and continuously improved by Pisa INFN in collaboration with IASF-Roma of INAF, can visualize the tracks produced within a low Z gas by photoelectrons of few keV. By reconstructing the impact point and the original direction of the photoelectrons, the GPD can measure the linear polarization of X-rays, while preserving the information on the absorption point, the energy and the time of individual photons. Applied to X-ray Astrophysics, in the focus of grazing incidence telescopes, it can perform angular resolved polarimetry with a huge improvement of sensitivity, when compared with the conventional techniques of Bragg diffraction at 45° and Compton scattering around 90°. This configuration is the basis of POLARIX and HXMT, two pathfinder missions, and is included in the baseline design of IXO, the very large X-ray telescope under study by NASA, ESA and JAXA.

Keywords

X-ray detectors and telescopes

Polarisation

Space instrumentation

PACS

29.40.Cs Gas-filled counters: ionization chambers, proportional, and avalanche counters

95.55.Qf Photometric, polarimetric, and spectroscopic instrumentation

95.55.Vj Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors

95.55.Ka X- and &ggr;-ray telescopes and instrumentation

07.85.Fv X- and gamma-ray sources, mirrors, gratings, and detectors

29.40.Gx Tracking and position-sensitive detectors

Subjects

Accelerators, beams and electromagnetism

Nuclear physics

Instrumentation and measurement

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 11 (November 2009)

Received 15 September 2009, accepted for publication 12 October 2009

Published 5 November 2009



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