At first, we're a bit stumped by the crystal chamber cover. Turns out it's quite easy to remove with a half-twist and some well-targeted pressure.

We subject the cover to a small battery of tests; it's made of an unknown material that is both nonmagnetic and nonconducting.

With its smooth inner surface and segmented exterior, this looks designed to protect the wielder from the saber's extreme energy output, while possibly providing a small measure of cooling for the internals.