EFFECT OF EDDY CURRENT IN MAGNETIC LAMINATIONS ON PULSED SEPTUM MAGNET RESPONSE

Pulsed Septum magnets have been developed for injection of 500 – 600 MeV, e beam into 2.5 GeV Storage ring (Indus-2). A Pulsed magnet system consists of a thin & thick passive type Septum magnets kept inside Vacuum Chamber & Kicker Magnets. Thin & thick septum magnets were excited using 50 μs & 100 μs half sine wave pulse respectively. A magnetic field homogeneity (ΔB/B) of the order of 10 -3 & integrated stray fields (∫ B stray. dl) of nearly 0.7 Gm has been achieved. This paper focuses on Pulse magnetization of Ni-Fe laminations; engineering challenges for septum magnets, Eddy current in lamination & their effects on pulse response of magnets.