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.

引用

页数：10

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