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berkeman
#4
Dec8-06, 06:56 PM
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Magnetic insulation

Quote Quote by Gokul43201 View Post
We may be interpreting "insulating" differently, but the pipe you described insulates the insides from external fields, doesn't it?
Very true, but I interpreted the OP question to be something like he'd like to have a B-field conductor that is insulated from other fields. I guess you could use something like a coaxial arrangement, where the outer mu metal hollow pipe has an air gap to an inner mu metal rod. The outer cylinder does as you say and insulates the inner rod from the outside fields, and the inner mu metal rod serves as the conductor for the desired field.

But it also sounded like frozendreams wanted the resulting protected B field to be in free space...?