Hi all, an update on breakdown study can be found in http://www.slac.stanford.edu/~asarti/recoil/sys/ please take a look and send me any comment/question... Alessio ______________________________________________________ Alessio Sarti Universita' & I.N.F.N. Ferrara tel +39-0532-781928 Ferrara roma +39-06-49914338 SLAC +001-650-926-2972