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Title: Temperature measurements during high flux ion beam irradiations

Abstract

A systematic study of the ion beam heating effect was performed in a temperature range of –170 to 900 °C using a 10 MeV Au 3+ ion beam and a Yttria stabilized Zirconia (YSZ) sample at a flux of 5.5 × 10 12 cm –2 s –1. Different geometric configurations of beam, sample, thermocouple positioning, and sample holder were compared to understand the heat/charge transport mechanisms responsible for the observed temperature increase. The beam heating exhibited a strong dependence on the background (initial) sample temperature with the largest temperature increases occurring at cryogenic temperatures and decreasing with increasing temperature. Comparison with numerical calculations suggests that the observed heating effect is, in reality, a predominantly electronic effect and the true temperature rise is small. Furthermore, a simple model was developed to explain this electronic effect in terms of an electrostatic potential that forms during ion irradiation. Such an artificial beam heating effect is potentially problematic in thermostated ion irradiation and ion beamanalysis apparatus, as the operation of temperature feedback systems can be significantly distorted by this effect.

Authors:
 [1];  [2];  [3];  [3]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States); Missouri Univ. of Science and Technology, Rolla, MO (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1267036
Alternate Identifier(s):
OSTI ID: 1420624
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 2; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ion beams; ion radiation effects; molybdenum; temperature measurement; thermocouples

Citation Formats

Crespillo, Miguel L., Graham, Joseph T., Zhang, Yanwen, and Weber, William J. Temperature measurements during high flux ion beam irradiations. United States: N. p., 2016. Web. doi:10.1063/1.4941720.
Crespillo, Miguel L., Graham, Joseph T., Zhang, Yanwen, & Weber, William J. Temperature measurements during high flux ion beam irradiations. United States. doi:10.1063/1.4941720.
Crespillo, Miguel L., Graham, Joseph T., Zhang, Yanwen, and Weber, William J. Tue . "Temperature measurements during high flux ion beam irradiations". United States. doi:10.1063/1.4941720. https://www.osti.gov/servlets/purl/1267036.
@article{osti_1267036,
title = {Temperature measurements during high flux ion beam irradiations},
author = {Crespillo, Miguel L. and Graham, Joseph T. and Zhang, Yanwen and Weber, William J.},
abstractNote = {A systematic study of the ion beam heating effect was performed in a temperature range of –170 to 900 °C using a 10 MeV Au3+ ion beam and a Yttria stabilized Zirconia (YSZ) sample at a flux of 5.5 × 1012 cm–2 s–1. Different geometric configurations of beam, sample, thermocouple positioning, and sample holder were compared to understand the heat/charge transport mechanisms responsible for the observed temperature increase. The beam heating exhibited a strong dependence on the background (initial) sample temperature with the largest temperature increases occurring at cryogenic temperatures and decreasing with increasing temperature. Comparison with numerical calculations suggests that the observed heating effect is, in reality, a predominantly electronic effect and the true temperature rise is small. Furthermore, a simple model was developed to explain this electronic effect in terms of an electrostatic potential that forms during ion irradiation. Such an artificial beam heating effect is potentially problematic in thermostated ion irradiation and ion beamanalysis apparatus, as the operation of temperature feedback systems can be significantly distorted by this effect.},
doi = {10.1063/1.4941720},
journal = {Review of Scientific Instruments},
number = 2,
volume = 87,
place = {United States},
year = {2016},
month = {2}
}

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    The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states
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