Comparison of two models of toroidal transformator?

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Anton Georgiev

Hello, I was not able to open your attachments but if I have understood your question, I think this article

https://www.researchgate.net/publication/291356147_Materials_and_Constructions_for_Magnetic_Cores_for_Impulsed_Transformers

may be useful to you.

Conference Paper Materials and Constructions for Magnetic Cores for Impulsed ...

And another thing that perhaps will be useful

https://www.researchgate.net/publication/291354725_Design_of_Pulsed_Transformers

Conference Paper Design of Pulsed Transformers