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Calculation of fast neutron dose in plastic-coated optical fibres

 
: Henschel, H.; Siebert, B.R.L.

:

Aerospatiale Espace et Defence, Les Mureaux:
RADECS 1997, Fourth European Conference on Radiation and its Effects on Components and Systems : September 15 - 19, 1997, Cannes, France
Piscataway, NJ: IEEE, 1998
ISBN: 0-7803-4071-X
S.466-471
European Conference on Radiation and its Effects on Components and Systems (RADECS) <4, 1997, Cannes>
Englisch
Konferenzbeitrag
Fraunhofer INT ()
optical fibres; radiation effect; fast neutrons; recoil protons; dose enhancement; neutron dose; total dose; Monte Carlo calculation

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 %.

: http://publica.fraunhofer.de/dokumente/N-264.html