Noise sources and their limitations on the performance of compound semiconductor hard radiation detectors

Zhifu Liu, J. A. Peters, Joon Il Kim, Sanjib Das, Kyle M. McCall, Bruce W. Wessels, Yihui He, Wenwen Lin, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

Abstract

We report on the measurement of frequency dependent noise spectra of photoconductive ternary compounds Cs3Sb2I9, Rb3Sb2I9, Hg3Se2I2, and TlSn2I5 for hard radiation detectors. The major sources of noise in these detectors are attributed to pickup noise, white noise, and frequency related 1/f noise. At low frequencies, the noise spectral density function exhibited 1/fα behavior where α is less than or equal to one. For those samples with α equal to one, radiation detection performances of the detectors, in terms of spectral measurements, have been reported in previous publications. The origin of 1/f noise of those samples is attributed to carrier fluctuations associated with deep centers/trapped holes. For those samples with α less than one, the origin of the deviation from a linear 1/f dependence is unknown and currently under investigation. However, this deviation is correlated with higher background white noise and lowered detector performance, and thus indicates that the material needs to be further optimized. Noise measurements are a useful indicator for screening prospective materials and samples for detectors.

Original languageEnglish
Pages (from-to)133-140
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume916
DOIs
Publication statusPublished - Feb 1 2019

Fingerprint

Radiation detectors
radiation detectors
white noise
Semiconductor materials
Detectors
detectors
White noise
deviation
Spectral density
Pickups
noise spectra
noise measurement
Probability density function
Screening
screening
low frequencies
Radiation
sensors
radiation

Keywords

  • Electronics
  • Noise
  • Radiation detector
  • Semiconductor

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Noise sources and their limitations on the performance of compound semiconductor hard radiation detectors. / Liu, Zhifu; Peters, J. A.; Kim, Joon Il; Das, Sanjib; McCall, Kyle M.; Wessels, Bruce W.; He, Yihui; Lin, Wenwen; Kanatzidis, Mercouri G.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 916, 01.02.2019, p. 133-140.

Research output: Contribution to journalArticle

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