It is unclear what kind of technology are they planning to use for this shield. If it is usual electromagnets, it's unclear where would they take energy from, if superconducting ones than it's unclear that it would be possible to keep them in superconducting state for long.
Wish someone more knowledgable about this kind of tech comment on this.
Definitely superconductors; that's the only viable way to generate a field that strong. Design the spacecraft properly and you may not need an active cooling system. The James Webb Space Telescope aims to keep the shaded side below 50KâĤ while at the same time solar panels and all its solar-facing equipment will operate 250K hotter near room temperature. The trick is maintaining this temperature gradient.
Apparently the design of the JWST is sufficient to reach temperatures as low as 37K on the cold side passively â below the superconducting limit for some materials. They're additionally using a cryocooler to take the temp down to below 7K for one specific instrument.
Wish someone more knowledgable about this kind of tech comment on this.