Title :
A broad-band auroral X-ray imager
Author :
Truman, A. ; Palmer, M.J. ; Durrant, P.T. ; Bird, A.J. ; Ramsden, D. ; Stadsnes, J.
Author_Institution :
Dept. of Phys., Southampton Univ., UK
fDate :
30 Oct-5 Nov 1994
Abstract :
A pinhole camera based on the use of a 3 inch square position-sensitive photomultiplier (PSPMT) to view a two-dimensional pixellated CsI(Tl) scintillation crystal has been designed to operate in the range 2 keV to 200 keV. It has also been used to generate extended test images by rotating two radioactive sources of different energies in the the field of view. The optical characteristics of the system have been simulated using a Monte-Carlo package in order to optimise the detector crystal geometry. The detector performance has also between investigated experimentally as a function of crystal dimensions, and measurements made using different readout techniques are presented. Also outlined is a design for an auroral imager based on the use of an array of such detector modules, for inclusion as part of the Auroral Imaging Observatory (AURIO), selected for inclusion within the payload complement for ENVISAT II. This will be located on a polar orbiting platform at an altitude of 800 km
Keywords :
Monte Carlo methods; X-ray astronomy; X-ray detection; X-ray imaging; astronomical instruments; aurora; photomultipliers; position sensitive particle detectors; solid scintillation detectors; 2 to 200 keV; 2D pixellated CsI(Tl) scintillation crystal; 3 inch square position-sensitive photomultiplier; AURIO; Auroral Imaging Observatory; ENVISAT II; Monte-Carlo package; broad-band auroral X-ray imager; crystal dimensions; detector crystal geometry; optical characteristics; payload complement; pinhole camera; polar orbiting platform; radioactive sources; Cameras; Detectors; Extraterrestrial measurements; Geometrical optics; Image generation; Packaging; Photomultipliers; Solid modeling; Testing; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474523
