The radiation damage of the positron source target for the International Linear Collider (ILC) has been studied. The displacement damage in target material due to multi-MeV photons has been calculated by combining FLUKA simulations for secondary particle production, SPECTER data for neutron displacement cross-sections and the Lindhard model for estimations of displacement damage by ions. The radiation damage of a stationary Ti6Al4V target in units of displacements per atom (dpa) has been estimated for photons from an undulator with strength 0.92 and period 1.15 cm. The calculated damage is 7 dpa. Approximately 12.5% of displacement damage result from neutrons.
Cite
@article{arxiv.0712.2343,
title = {Radiation damage of the ILC positron source target},
author = {Andriy Ushakov and Sabine Riemann},
journal= {arXiv preprint arXiv:0712.2343},
year = {2009}
}
Comments
to appear in the proceedings of the Linear Collider Workshop 2007 and the International Linear Collider meeting 2007, DESY, Hamburg, 30 May - 3 June 2007