Abstract(s) :
(Anglais) The IceCube detector, planned to reach 1 km3 in the next 3 years, is now 50% complete with 40 strings deployed in the ice and 40 IceTop stations installed on the surface. To im- prove the sensitivity of IceCube to high-energy neutrinos, the spacing between strings de- ployed in the detector’s last construction phase may be increased. We consider several final detector geometry possibilities, and demonstrate that a substantial increase in the expected number of neutrino events with energies from 0.5 to 500 PeV, and a similar improvement for the signal expectation from GZK neutrinos, can be achieved.