sorry for my too late reply.....

well it would be intresting to post a schema of how to do it. Also i couldn't understand the particular part of your reply....
"Here is how it goes: You make an electromagnet on a rod, the bigger the better. Then, you surround this electromagnet with
high speed explosive. You close house all this with another rod (bigger diameter). now you let current flow through the electromagnet, which creates electromagnetic lines.
You set the explosives.
The explosives will contract the inner tube and the electromagnetic field will be condensed. The field will be unleashed when the electromagnet is destroyed...."