The Use Of Optical Fibre In A High-Radiation Environment To Monitor Ha Light From The JET Tokamak

P. D. Morgan; G. Magyar

doi:10.1117/12.935638

29 March 1984 The Use Of Optical Fibre In A High-Radiation Environment To Monitor H_aLight From The JET Tokamak

P. D. Morgan, G. Magyar

Proceedings Volume 0404, Optical Fibers in Adverse Environments; (1984) https://doi.org/10.1117/12.935638
Event: Photon 83 International Conference on Optical Fibers, 1983, Paris, France

Abstract

The projected use of optical fibre is described to relay H_a light from the JET tokamak to a radiation-free environment. In the final two years of operation the device could produce through neutron emission an accumulated ionising dose of 1.5 x 10₈ rads(Si). The radiation-induced luminescence and optical absorption in the fibre are estimated. Whilst the former is negligible, the induced attenuation could reach 15 db. Photobleaching is an effective technique for reducing this loss. Continuous monitoring of the absorption, by transmitting a test signal through auxiliary fibres, would permit measurement of the absolute H_a intensity.

Citation Download Citation

P. D. Morgan and G. Magyar "The Use Of Optical Fibre In A High-Radiation Environment To Monitor H_aLight From The JET Tokamak", Proc. SPIE 0404, Optical Fibers in Adverse Environments, (29 March 1984); https://doi.org/10.1117/12.935638

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