A dedicated system for in situ testing of gamma ray induced optical absorption and emission in optical materials

Serious radiation damage due to the high energy neutron/gamma fluxes is expected for optical materials such as scintillators, windows, and lenses which will be part of the plasma diagnostics in future fusion devices. Radiation induced absorption represents a major concern for these components for wh...

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Bibliographic Details
Published in:Review of scientific instruments 2018-06, Vol.89 (6), p.065109-065109
Main Authors: Malo, Marta, García-Cortés, Isabel, Muñoz, Patricia, Moroño, Alejandro, Hodgson, Eric R.
Format: Article
Language:English
Subjects:
Absorption
Emission analysis
Field tests
Fluxes
Food irradiation
Gamma irradiation
Gamma rays
Incident light
Optical materials
Optics
Plasma diagnostics
Radiation damage
Radiation dosage
Radiation effects
Sample holders
Scientific apparatus & instruments
Scintillation counters
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Summary:Serious radiation damage due to the high energy neutron/gamma fluxes is expected for optical materials such as scintillators, windows, and lenses which will be part of the plasma diagnostics in future fusion devices. Radiation induced absorption represents a major concern for these components for which experimental validation under as near as possible reactor conditions becomes essential. A new experimental system has been developed at the CIEMAT Nayade 60Co gamma irradiation facility for in situ radiation induced optical absorption measurements, covering a spectral range between 370 and 730 nm. This setup consists in a rotating sample holder which allows one to collect incident light (reference signal) and transmitted light through the material to be tested as a function of irradiation dose. This is an advanced and robust system which overcomes the important experimental difficulties that radiation involves providing a valuable testing capability for transmission components and scintillators under realistic fusion conditions. A detailed description of the experimental arrangement, together with preliminary tests carried out for system validation is given in this paper.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5024990