DocumentCode :
437933
Title :
A monolithic array of 77 silicon drift detectors for X-ray spectroscopy and gamma-ray imaging applications
Author :
Fiorini, C. ; Bellini, M. ; Gola, A. ; Longoni, A. ; Perotti, F. ; Lechner, P. ; Soltau, H. ; Strüder, L.
Author_Institution :
Dipt. di Elettronica e Informazione, Politecnico di Milano, Milan, Italy
Volume :
2
fYear :
2004
fDate :
16-22 Oct. 2004
Firstpage :
1324
Abstract :
Monolithic arrays of silicon drift detectors (SDDs) have been employed successfully in X-ray spectroscopy and γ-ray imaging applications. Thanks to the low electronics noise achieved at short shaping time, these devices are ideal for high-resolution and high-rate X-ray spectroscopy experiments at synchrotron sources. Moreover, small monolithic arrays of SDDs have been also used as photodetector in a first prototype of Anger camera with less 0.3 mm intrinsic resolution for γ-ray imaging. In this work we present a new monolithic array of silicon drift detectors, each one with a front-end JFET integrated at its center. It consists of a single chip composed by 77 single hexagonal units arranged in a honeycomb configuration. Each SDD unit has an active area of 8.7 mm2, for a total active area of the device of 6.7 cm2. The linear dimensions of the chip are 36×32 mm2, 28×24 mm2 approximately for the active area. It represents the largest monolithic array of SDDs with on-chip JFETs produced up to now. The results of the experimental test of the detector array, including the X-ray spectroscopy characterization of the SDDs units is presented in this work. At a single-unit level, an energy resolution of 142 eV has been measured at -10°C.
Keywords :
X-ray spectrometers; X-ray spectroscopy; drift chambers; gamma-ray apparatus; gamma-ray applications; gamma-ray detection; imaging; junction gate field effect transistors; photodetectors; silicon radiation detectors; 142 eV; Anger camera; active area; electronics noise; energy resolution; front-end JFET; gamma-ray imaging; high-rate X-ray spectroscopy; high-resolution X-ray spectroscopy; honeycomb configuration; monolithic silicon drift detector array; on-chip JFET; photodetector; synchrotron sources; Gamma ray detection; Gamma ray detectors; High-resolution imaging; Nuclear imaging; Sensor arrays; Silicon; Spectroscopy; X-ray detection; X-ray detectors; X-ray imaging;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
ISSN :
1082-3654
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
Type :
conf
DOI :
10.1109/NSSMIC.2004.1462443
Filename :
1462443
Link To Document :
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