The BGO anticoincidence system of the PoGOLite balloon-borne soft gamma-ray polarimeter
2007 (English)In: Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 / [ed] Rogelio Caballero, Juan Carlos D’Olivo, Gustavo Medina-Tanco, Lukas Nellen, Federico A. Sánchez, José F. Valdés-Galicia, Universidad Nacional Autonoma de Mexico , 2007, Vol. 2, 483-486 p.Conference paper (Refereed)
The PoGOLite balloon-borne experiment applies well-type phoswich detector technology tomeasurements of soft gamma-ray polarization in the 25 keV - 80 keV energy range. The polarization isdetermined using Compton scattering and photoelectric absorption in an array of 217 plastic scintillators.This sensitive volume is surrounded by a segmented bismuth germanate oxide (BGO) anticoincidenceshield, designed to reduce background from charged cosmic rays, primary and atmospheric gamma-rays,and atmospheric and instrumental neutrons. A total of 379 BGO crystals with three different geometriesare used, giving an overall mass of approximately 250 kg. Tests of the BGO crystals are described andthe overall design of the anticoincidence shield is reviewed.
Place, publisher, year, edition, pages
Universidad Nacional Autonoma de Mexico , 2007. Vol. 2, 483-486 p.
Gamma rays, Polarization, Anticoincidence shield, Anticoincidence systems, Balloon-borne experiment, Bismuth germanate, Different geometry, Photoelectric absorption, Plastic scintillator, Soft gamma-ray polarimeters
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:kth:diva-80172ScopusID: 2-s2.0-84899523686OAI: oai:DiVA.org:kth-80172DiVA: diva2:496143
30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico, 3 July 2007 through 11 July 2007
QC 201205092012-02-092012-02-092015-04-16Bibliographically approved