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 x 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. 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 beam analysis apparatus, as the operation of temperature feedback systems can be significantly distorted by this effect.
M. L. Crespillo et al., "Temperature Measurements during High Flux Ion Beam Irradiations," Review of Scientific Instruments, vol. 87, no. 2, American Institute of Physics (AIP), Feb 2016.
The definitive version is available at https://doi.org/10.1063/1.4941720
Nuclear Engineering and Radiation Science
Keywords and Phrases
Heating; Ion bombardment; Ions; Irradiation; Temperature measurement; Thermocouples; Thermoelectricity; Yttria stabilized zirconia; Zirconia; Cryogenic temperatures; Electrostatic potentials; Geometric configurations; Increasing temperatures; Ion beam irradiation; Numerical calculation; Temperature feedback; Yttria-stabilized zirconias (YSZ); Ion beams
International Standard Serial Number (ISSN)
Article - Journal
© 2016 The Author(s), All rights reserved.
01 Feb 2016
This work was primarily supported by the U.S. Department of Energy (DOE) Nuclear Energy University Programs. M. L. Crespillo and J. T. Graham are grateful to support from the University of Tennessee Governors Chair program.