system
Given the following post, respond as if you're commenting on Reddit:
human
[Logan]? Spoilers

Could Logan have put magneto's helmet over the professor to keep his powers from hurting anybody?
gpt
In theory, yes. The helmet is able to keep out all forms of telepathy so it should be able to keep it in as well.

The problem is that it was Xavier's first attack, which happened suddenly and unexpectedly, that caused the majority of the deaths and injuries. After that the damage was done and Logan took Charles into hiding. Given the state of how things were for Logan and co after that, it's unlikely he would have had any time to go hunting down the helmet afterwards, assuming it was even still around and that Magneto hadn't been buried with it or something.