About SEEs in the HV Distributor System of the TileCal

SEE tests performed in october 2001 (27-28) on the HV distributor system of the Tile calorimeter gave us estimated numbers concerning soft and latch-up events. Even if the rates seen will not prevent the device from running, it is important to try to reduce them and to predict how the system will react in particular to latch-ups. This note describes the efforts developped to reduce SEE rates and to secure the behaviour of the system with respect to latch-ups.