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This paper summarises progress made towards the radiation hardening of LEDemergency luminaires for evacuation and emergency response within theunderground areas of the CERN accelerator complex. The objective has been toradiation harden existing Commercial Off-The-Shelf (COTS) emergency luminairesto maximise lighting performance, without compromising IEC 60598-2-22compliance. A systems level approach has been adopted, leading to thedevelopment of a diode bridge based AC/DC power converter. Modified COTSluminaires including this converter design have been irradiated (to 100 kGy TIDusing a Cobalt-60 source), with results of a subsequent photometric analysispresented. Following encouraging tests results, a reference design for thepower converter has been released under the CERN Open Hardware License toencourage manufacturer adoption. The paper concludes with areas of interest forfuture research in further improving the radiation hardness of LED emergencylighting for accelerators with detailed studies at the component level for highpower white LED devices and associated optical components.

Radiation Hardening of LED Luminaires for Accelerator Tunnels