ITS->SetThicknessDet1(300.); // detector thickness on layer 1 must be in the range [100,300]
ITS->SetThicknessDet2(300.); // detector thickness on layer 2 must be in the range [100,300]
ITS->SetThicknessChip1(300.); // chip thickness on layer 1 must be in the range [150,300]
ITS->SetThicknessDet1(300.); // detector thickness on layer 1 must be in the range [100,300]
ITS->SetThicknessDet2(300.); // detector thickness on layer 2 must be in the range [100,300]
ITS->SetThicknessChip1(300.); // chip thickness on layer 1 must be in the range [150,300]