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Beam test results of the polarized gamma-ray observer, PoGOLite
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2008 (English)In: 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008 NSS/MIC), VOLS 1-9, 2008, 732-736 p.Conference paper (Refereed)
Abstract [en]

The Polarized Gamma-ray Observer, PoGOLite, is a balloon experiment with the capability of detecting 10% polarization from a 200 mCrab celestial object in the energy range 25 #x2013;80 keV. During a beam test at KEK-PF in February 2008, 20 detector units were assembled, and a 50 keV X-ray beam with a polarization degree of #x223C;90% was irradiated at the center unit. Signals from all 20 units were fed into flightversion electronics consisting of six circuit boards (four waveform digitizer boards, one digital I/O board and one router board) and one microprocessor (SpaceCube), which communicate using a SpaceWire interface. One digitizer board, which can associate up to 8 PDCs, outputs a trigger signal. The digital I/O board handles the trigger and returns a data acquisition request if there is no veto signal (upper or pulse-shape discriminators) from any detector unit. This data acquisition system worked well, and the modulation factor was successfully measured to be #x223C;34%. These results confirmed the capabilities of both detector and data-acquisition system for a pathfinder flight planned in 2010.

Place, publisher, year, edition, pages
2008. 732-736 p.
Keyword [en]
PoGOLite, X-ray and gamma-ray polarimeter, Balloon experiment, Data acquisition system (SpaceWire)
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:kth:diva-80120DOI: 10.1109/NSSMIC.2008.4774565ISI: 000268656000004ScopusID: 2-s2.0-67649203677ISBN: 978-1-4244-2714-7OAI: diva2:496008
IEEE Nuclear Science Symposium/Medical Imaging Conference. Dresden, GERMANY. OCT 19-25, 2008

QC 20120210

Available from: 2012-02-09 Created: 2012-02-09 Last updated: 2016-05-12Bibliographically approved

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