Title :
Calculation of fast neutron dose in plastic-coated optical fibres
Author :
Siebert, B.R.L. ; Henschel, H.
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
fDate :
6/1/1998 12:00:00 AM
Abstract :
The dose of fast neutrons in optical fibres with hydrogen-containing coating materials is considerably increased by energetic recoil protons. Their contribution to the dose in a SiO2 fibre core is calculated by the Monte Carlo method for different fibre geometries and a fibre optic cable. With 14 MeV neutrons the dose in a single fibre is increased by about 21%, whereas in fibre bundles the dose increase can reach about 170%. Maximum dose enhancement in fibre bundles (about 610%) occurs at neutron energies around 5.5 MeV. The dose increase caused by 14 MeV neutrons in the fibre of a typical laboratory cable is about 124%
Keywords :
Monte Carlo methods; neutron effects; optical cables; optical fibre cladding; 5.5 to 14 MeV; Monte Carlo method; SiO2; SiO2 fibre core; fast neutron dose; fibre bundle; fibre optic cable; optical fibre; plastic coating; recoil protons; Coatings; Fiber optics; Gamma ray effects; Gamma rays; Neutrons; Optical fiber cables; Optical fiber testing; Optical fibers; Optical materials; Protons;
Journal_Title :
Nuclear Science, IEEE Transactions on
