Hi,
I'm not very familiar with the pulse magnetron you were talking about. What you can do is to try to search for the SPICE model of the pulse magnetron on the Internet, which I did but couldn't find any useful information. Please know that all the simulation components are constructed based on the SPICE model and if that's not available the simulation cannot be done. So I'm afraid at this point we can't really help you. Sorry.
Derek Z.
National Instruments