Development of high spatial resolution detector for characterization of X-ray optics

被引：4
|
作者：
Kudrolli, H. [1 ]
Bhandari, H. [1 ]
Breen, M. [1 ]
Gelfandbein, V. [1 ]
Miller, S. R. [1 ]
Pivovaroff, M. [2 ]
Squillante, M. R. [1 ]
Vogel, J. [2 ]
Nagarkar, V. V. [1 ]
机构：
[1] Radiat Monitoring Devices Inc, Imaging Technol Grp, Watertown, MA 02172 USA
[2] Lawrence Livermore Natl Lab, Phys & Life Sci Directorate, Livermore, CA USA
来源：
JOURNAL OF INSTRUMENTATION | 2011年 / 6卷
关键词：
X-ray detectors; Detector design and construction technologies and materials; Scintillators and scintillating fibres and light guides; X-ray detectors and telescopes;
D O I：
10.1088/1748-0221/6/12/C12013
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Technological innovations in grazing incidence X-ray optics have been crucial to the advancement of the field of X-ray astronomy. Improvements in X-ray focusing optics translate to higher sensitivity for X-ray telescopes operating in the energy range above 10 keV. Full characterization of the X-ray optics involves measurement of the point spread function, scattering, and reflectivity properties of substrate coatings. This requires a very high spatial resolution, high sensitivity, photon counting and energy discriminating large area detector. In this paper we describe the construction of a detector that is well suited to meet these requirements. A prototype version of this camera was used to calibrate the X-ray focusing optics for the Nuclear Spectroscopic Telescope Array (NuSTAR) mission. Analysis of the data obtained during the ground calibration of the NuSTAR telescopes demonstrated the advantages of such a high resolution 2D detector for hard X-rays (30 + keV); however it showed some limitations for medium energy X-rays (8-30 keV). We present here, alternative methods under investigation to improve performance of the detector for medium energy X-rays such as changing the morphology of the CsI:Tl scintillator, improving light transport from scintillator to EMCCD and using a novel bright scintillator, Ba2CsI5:Eu.
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页数：10
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