Publication detail

Optimization of signal-to-noise ratio in CdTe radiation detectors

ANDREEV, A. ŠIK, O. GRMELA, L.

Original Title

Optimization of signal-to-noise ratio in CdTe radiation detectors

Czech Title

Optimization of signal-to-noise ratio in CdTe radiation detectors

English Title

Optimization of signal-to-noise ratio in CdTe radiation detectors

Type

conference paper

Language

en

Original Abstract

This paper studies the effect of depleted region on noise characteristics of CdTe and on signal-to-noise ratio. Measurements showed that dominant type of nose for the studied CdTe samples is low frequency noise. Its analysis indicates that the experimental value of noise is always much higher than the theoretical value. The voltage noise spectral density of low frequency noise is directly proportional to the depleted region width. This excess noise level is caused by very low concentration of free carriers within the depleted region. Excess value of noise leads to deterioration of signal-to-noise ratio. One of the ways in optimizing signal-to-noise ratio is to decrease depleted region width. This can be done for example by appropriate choosing dopants which will adjust Fermi level of CdTe.

Czech abstract

This paper studies the effect of depleted region on noise characteristics of CdTe and on signal-to-noise ratio. Measurements showed that dominant type of nose for the studied CdTe samples is low frequency noise. Its analysis indicates that the experimental value of noise is always much higher than the theoretical value. The voltage noise spectral density of low frequency noise is directly proportional to the depleted region width. This excess noise level is caused by very low concentration of free carriers within the depleted region. Excess value of noise leads to deterioration of signal-to-noise ratio. One of the ways in optimizing signal-to-noise ratio is to decrease depleted region width. This can be done for example by appropriate choosing dopants which will adjust Fermi level of CdTe.

English abstract

This paper studies the effect of depleted region on noise characteristics of CdTe and on signal-to-noise ratio. Measurements showed that dominant type of nose for the studied CdTe samples is low frequency noise. Its analysis indicates that the experimental value of noise is always much higher than the theoretical value. The voltage noise spectral density of low frequency noise is directly proportional to the depleted region width. This excess noise level is caused by very low concentration of free carriers within the depleted region. Excess value of noise leads to deterioration of signal-to-noise ratio. One of the ways in optimizing signal-to-noise ratio is to decrease depleted region width. This can be done for example by appropriate choosing dopants which will adjust Fermi level of CdTe.

Keywords

low frequency noise; CdTe radiation detector; signal-to-noise ratio

RIV year

2012

Released

05.07.2012

Publisher

IEEE

Location

Rio de Janeiro, Brazil

ISBN

978-1-4577-0191-7

Book

ICNF2011: 2011 21st International Conference on Noise and Fluctuations

Edition

1

Edition number

1

Pages from

1

Pages to

3

Pages count

3

BibTex


@inproceedings{BUT96524,
  author="Alexey {Andreev} and Ondřej {Šik} and Lubomír {Grmela}",
  title="Optimization of signal-to-noise ratio in CdTe radiation detectors",
  annote="This paper studies the effect of depleted region on noise characteristics of CdTe and on signal-to-noise ratio. Measurements showed 
that dominant type of nose for the studied CdTe samples is low frequency noise. Its analysis indicates that the experimental value of 
noise is always much higher than the theoretical value. The voltage noise spectral density of  low frequency noise is directly 
proportional to the depleted region width. This excess noise level is caused by very low concentration of free carriers within the 
depleted region.  Excess value of noise leads to deterioration of signal-to-noise ratio.  
One of the ways in optimizing signal-to-noise ratio is to decrease depleted region width. This can be done for example by appropriate 
choosing dopants which will adjust Fermi level of CdTe.",
  address="IEEE",
  booktitle="ICNF2011: 2011 21st International Conference on Noise and Fluctuations",
  chapter="96524",
  edition="1",
  howpublished="print",
  institution="IEEE",
  year="2012",
  month="july",
  pages="1--3",
  publisher="IEEE",
  type="conference paper"
}