Some considerations to the design of NB snubber

Snubber is often used as functional passive protection device to be inserted between the ion source and its acceleration power supply for arc quenching purpose. Fink, Baker and Owren developed related design method by neglecting the inductance effects of the core snubber and assuming that the snubber core never saturates, which gives the analysis solution to the design of core snubber. The Fink-Baker method used the assumption that the eddy current resistance is about 2.5 times its logic derived one which is an empirical design method and verified in their snubber tests in Lawrence Berkeley Laboratory. This method is further used in the design of DIIID 100kV snubber. Due to that the inductance does exist in the equivalent circuit of the core snubber, its effects and its design rules are discussed further. Some experimental evaluations have been done to verify the analysis results, which could be used for detail design of core snubbers.