CERN Accelerating science

Article
Report number	arXiv:1609.03481
Title	Radiation Hardening of LED Luminaires for Accelerator Tunnels
Related title	Radiation Hardening of LED Luminaires for Accelerator Tunnels
Author(s)	Devine, James D. (CERN) ; Floriduz, Alessandro (CERN)
Publication	2016-09
Imprint	12 Sep 2016
Number of pages	6
Note	Comments: 15 pages 15 pages
In:	16th European Conference on Radiation and its Effects on Components and Systems, Bremen, Germany, 19 - 23 Sep 2016, pp.1-6
DOI	10.1109/RADECS.2016.8093210
Subject category	physics.acc-ph ; Accelerators and Storage Rings
Abstract	This paper summarises progress made towards the radiation hardening of LED emergency luminaires for evacuation and emergency response within the underground areas of the CERN accelerator complex. The objective has been to radiation harden existing Commercial Off-The-Shelf (COTS) emergency luminaires to maximise lighting performance, without compromising IEC 60598-2-22 compliance. A systems level approach has been adopted, leading to the development of a diode bridge based AC/DC power converter. Modified COTS luminaires including this converter design have been irradiated (to 100 kGy TID using a Cobalt-60 source), with results of a subsequent photometric analysis presented. Following encouraging tests results, a reference design for the power converter has been released under the CERN Open Hardware License to encourage manufacturer adoption. The paper concludes with areas of interest for future research in further improving the radiation hardness of LED emergency lighting for accelerators with detailed studies at the component level for high power white LED devices and associated optical components.
Copyright/License	CC-BY-4.0

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