Publication detail

Noise Sources in the CdTe radiation detectors

GRMELA, L. ANDREEV, A. ŠIKULA, J. ZAJAČEK, J. MORAVEC, P.

Original Title

Noise Sources in the CdTe radiation detectors

Czech Title

Zdroje šumu v detektorech CdTe

English Title

Noise Sources in the CdTe radiation detectors

Type

conference paper

Language

en

Original Abstract

Noise and transport characteristics of CdTe gamma - and X-ray detectors have been carried out to determine the 1/f noise sources and theirs correlation with charge carriers mobility. The noise spectral density was measured by standard set-up. The noise of low ohmic samples has 1/f noise spectral density which increases with the square of voltage. The high ohmic samples revile 1/fa type noise in low frequency range and G-R noise in frequency above 100 Hz. In low frequency range noise spectral is proportional to fourth power of current and then we suppose that main source of noise is in Schottky barrier in vicinity of contacts. We suppose that thickness of the region with dominant contribution to noise decreases with increasing current and total reciprocal number of curriers is proportional to second power of current. Then current noise spectral density is proportional to fourth power of current.

Czech abstract

Zdroje šumu a transport nosičů v detektorech záření na bázi CdTe

English abstract

Noise and transport characteristics of CdTe gamma - and X-ray detectors have been carried out to determine the 1/f noise sources and theirs correlation with charge carriers mobility. The noise spectral density was measured by standard set-up. The noise of low ohmic samples has 1/f noise spectral density which increases with the square of voltage. The high ohmic samples revile 1/fa type noise in low frequency range and G-R noise in frequency above 100 Hz. In low frequency range noise spectral is proportional to fourth power of current and then we suppose that main source of noise is in Schottky barrier in vicinity of contacts. We suppose that thickness of the region with dominant contribution to noise decreases with increasing current and total reciprocal number of curriers is proportional to second power of current. Then current noise spectral density is proportional to fourth power of current.

Keywords

Noise, 1/f noise, contact noise, mobility fluctuation, GR spectra, Schottky barrier

RIV year

2007

Released

14.09.2007

Publisher

American Institute of Physics

Location

Melville, USA

ISBN

978-0-7354-0432-8

Book

Noise and Fluctuation - 19-th International Conference on Noise and Fluctuations - ICNF 2007

Edition

M.Tacano, Y.Yamamoto, M.Nakao

Edition number

922

Pages from

302

Pages to

305

Pages count

4

BibTex


@inproceedings{BUT22865,
  author="Lubomír {Grmela} and Alexey {Andreev} and Josef {Šikula} and Jiří {Zajaček} and Pavel {Moravec}",
  title="Noise Sources in the CdTe radiation detectors",
  annote="Noise and transport characteristics of CdTe gamma - and X-ray detectors have been carried out to determine the 1/f noise sources and theirs correlation with charge carriers mobility. The noise spectral density was measured by standard set-up. The noise of low ohmic samples has 1/f noise spectral density which increases with the square of voltage. The high ohmic samples revile 1/fa type noise in low frequency range and G-R noise in frequency above 100 Hz. In low frequency range noise spectral is proportional to fourth power of current and then we suppose that main source of noise is in Schottky barrier in vicinity of contacts. We suppose that thickness of the region with dominant contribution to noise decreases with increasing current and total reciprocal number of curriers is proportional to second power of current. Then current noise spectral density is proportional to fourth power of current.",
  address="American Institute of Physics",
  booktitle="Noise and Fluctuation - 19-th International Conference on Noise and Fluctuations - ICNF 2007",
  chapter="22865",
  edition="M.Tacano, Y.Yamamoto, M.Nakao",
  institution="American Institute of Physics",
  year="2007",
  month="september",
  pages="302--305",
  publisher="American Institute of Physics",
  type="conference paper"
}