MSIA & MSIB

The  impedance of the copper coated injection  septa  in  IR2  and  IR8  (MSIA  and  MSIB, made out of mu-metal,  4 m long magnets, in groups of 5) and of the dump septa in  IR6  (15 MSD,  4 m long  magnets) should be re-evaluated, even though it should be negligible according to the LHC Design Report (RLC meeting 07.04.2006). After the RLC meeting, Stephane Fartoukh informed FR and EM that there are   several   transverse   steps   of   the  vacuum  chamber  in correspondence with these septa.