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Development of a 32-channel ASIC for an X-ray APD detector onboard the ISS.
- Source :
-
Nuclear Instruments & Methods in Physics Research Section A . Feb2018, Vol. 882, p138-147. 10p. - Publication Year :
- 2018
-
Abstract
- We report on the design and performance of a mixed-signal application specific integrated circuit (ASIC) dedicated to avalanche photodiodes (APDs) in order to detect hard X-ray emissions in a wide energy band onboard the International Space Station. To realize wide-band detection from 20 keV to 1 MeV, we use Ce:GAGG scintillators, each coupled to an APD, with low-noise front-end electronics capable of achieving a minimum energy detection threshold of 20 keV. The developed ASIC has the ability to read out 32-channel APD signals using 0.35 μ m CMOS technology, and an analog amplifier at the input stage is designed to suppress the capacitive noise primarily arising from the large detector capacitance of the APDs. The ASIC achieves a performance of 2099 e − + 1.5 e − /pF at root mean square (RMS) with a wide 300 fC dynamic range. Coupling a reverse-type APD with a Ce:GAGG scintillator, we obtain an energy resolution of 6.7% (FWHM) at 662 keV and a minimum detectable energy of 20 keV at room temperature (20 °C). Furthermore, we examine the radiation tolerance for space applications by using a 90 MeV proton beam, confirming that the ASIC is free of single-event effects and can operate properly without serious degradation in analog and digital processing. [ABSTRACT FROM AUTHOR]
- Subjects :
- *INTEGRATED circuits
*PHOTODIODES
*X-rays
*ENERGY bands
Subjects
Details
- Language :
- English
- ISSN :
- 01689002
- Volume :
- 882
- Database :
- Academic Search Index
- Journal :
- Nuclear Instruments & Methods in Physics Research Section A
- Publication Type :
- Academic Journal
- Accession number :
- 126804906
- Full Text :
- https://doi.org/10.1016/j.nima.2017.09.003