Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5467170 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2017 | 5 Pages |
Abstract
Irradiation with â¼3 MeV proton fluences of 106-109 protons cmâ2 have been applied to study the effects on human brain tissue corresponding to single-cell irradiation doses and doses received by electronic components in low-Earth orbit. The low fluence irradiations were carried out using a proton microbeam with the post-focus expansion of the beam; a method developed by the group of Breese [1]. It was found from electrophysiological measurements that the mean neuronal frequency of human brain tissue decreased to zero as the dose increased to 0-1050 Gy. Enhancement-mode MOSFET transistors exhibited a 10% reduction in threshold voltage for 2.7 MeV proton doses of 10 Gy while a NPN bipolar transistor required â¼800 Gy to reduce the hfe by 10%, which is consistent the expected values.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Harry J. Whitlow, Edouard Guibert, Patrick Jeanneret, Alexandra Homsy, Joy Roth, Sven Krause, Adrien Roux, Emmanuel Eggermann, Luc Stoppini,