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Title: Charge collection efficiency degradation induced by MeV ions in semiconductor devices: Model and experiment

Journal Article · · Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
 [1];  [2];  [3];  [4];  [5];  [6];  [2];  [7];  [8]
  1. Univ. of Torino, Torino (Italy)
  2. ANSTO, Kirrawee, NSW (Austria)
  3. National Univ. of Singapore (Singapore)
  4. CNA, Sevilla (Spain)
  5. Ruder Boskovic Institute, Zagreb (Croatia)
  6. Univ. of Helsinki, Helsinki (Finland)
  7. International Atomic Energy Agency, Vienna (Austria); Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), Debrecen (Hungary)
  8. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

This study investigates both theoretically and experimentally the charge collection efficiency (CCE) degradation in silicon diodes induced by energetic ions. Ion Beam Induced Charge (IBIC) measurements carried out on n- and p-type silicon diodes which were previously irradiated with MeV He ions show evidence that the CCE degradation does not only depend on the mass, energy and fluence of the damaging ion, but also depends on the ion probe species and on the polarization state of the device. A general one-dimensional model is derived, which accounts for the ion-induced defect distribution, the ionization profile of the probing ion and the charge induction mechanism. Using the ionizing and non-ionizing energy loss profiles resulting from simulations based on the binary collision approximation and on the electrostatic/transport parameters of the diode under study as input, the model is able to accurately reproduce the experimental CCE degradation curves without introducing any phenomenological additional term or formula. Although limited to low level of damage, the model is quite general, including the displacement damage approach as a special case and can be applied to any semiconductor device. It provides a method to measure the capture coefficients of the radiation induced recombination centres. They can be considered indexes, which can contribute to assessing the relative radiation hardness of semiconductor materials.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
International Atomic Energy Agency
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1238654
Report Number(s):
SAND-2015-9676J; 607657
Journal Information:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 119, Issue 50; ISSN 0168-583X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (1)

Characterisation and evaluation of a PNP strip detector for synchrotron microbeam radiation therapy journal June 2018