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Träfflista för sökning "(WFRF:(Varner G.)) srt2:(2005-2009) srt2:(2008)"

Sökning: (WFRF:(Varner G.)) srt2:(2005-2009) > (2008)

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1.
  • Kiss, Mózsi, et al. (författare)
  • The PoGOLite balloon-borne soft gamma-ray polarimeter
  • 2008
  • Ingår i: COOL DISCS, HOT FLOWS. - : AIP. ; , s. 225-232
  • Konferensbidrag (refereegranskat)abstract
    • Linearly polarized radiation in the hard X-ray/soft gamma-ray band is expected from a large variety of astronomical sources. We discuss the importance of polarimetric studies for several classes of sources - pulsars, accreting black holes. magnetic neutron stars and jets from active galaxies - and then describe PoGOLite, a balloon-borne instrument which is currently under construction and will be able to measure the polarization of electromagnetic radiation from such extra-solar objects in the energy range 25-80 keV.
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2.
  • Takahashi, H., et al. (författare)
  • Beam test results of the polarized gamma-ray observer, PoGOLite
  • 2008
  • Ingår i: 2008 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (2008 NSS/MIC), VOLS 1-9. - 9781424427147 ; , s. 732-736
  • Konferensbidrag (refereegranskat)abstract
    • 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.
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