I'm going to post Devon's request here. The best place to reply (for now) would be at the above link since it will give Devon an automatic notification.
Hi my name is Devon and I am a student at Peninsula College. I am currently a part of an undergraduate research project where we are attempting to build and IEC. At the moment we are trying to decide what level of vacuum pump we need for our fusor. I am looking through the books you offered in your blog but was hoping you could tell me how you came to a decision on a level of vacuum. Our advisor would like for us to prove mathematically what level we need.
Thanks for your help,
Here is a link to the Peninsula College's home page: