@inproceedings{b4bee8ba62eb4bf68eecfa1125ae790a,
title = "Radioactive emission from high-index,optical glasses and atypical effects on CCDs",
abstract = "Large-amplitude anomalous events have been observed in CCDs due to radioactive emission from high-index optical glasses, some producing charge-trapping like artefacts. We have identified the source of these events from one glass (Ohara S-YGH51) as α-particles from trace amounts of nuclides in the actinium decay series, parent 235U. We present measurements of the anomalous event rate for samples of 15 separate optical glasses with nd >= 1.6. There is a variation in anomalous count rates of orders of magnitude range over these materials. Care should be taken in the selection of optical glasses to be located in close proximity to detectors.",
keywords = "Artefacts, CCD, Charge trapping, HERMES, High-index, Optical glass, Radioactivity",
author = "Edgar, {Michael L.} and Ross Zhelem and Lewis Waller and Janez Kos and Don Mayfield and Naveen Pai and Andrew Sheinis and {De Silva}, Gayandhi and Jeffrey Simpson and Nicholas Stazak",
year = "2018",
month = jul,
day = "10",
doi = "10.1117/12.2307305",
language = "English",
isbn = "9781510619654",
series = "Proceedings of SPIE",
publisher = "SPIE",
editor = "Ram{\'o}n Navarro and Roland Geyl",
booktitle = "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III",
address = "United States",
note = "Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III 2018 ; Conference date: 10-06-2018 Through 15-06-2018",
}