Halo Rays are a type of ranged weapon used by Angeli.
This weapon has the appearance of a tube, with blade-like devices at one end. From the bladed end, a white particle beam can be fired. From the other, a halo-shaped plasma torus can be fired. The particle beam is mercury ions accelerated by a coil system, and the torus is a 3000km/s projectile. The torus does its damaged by the release of x-rays upon impact, being too insubstantial to cause much physical damage.
The torus is used for attacking multiple targets, whereas the particle beam is more focussed.
Angeli warships often bear upscaled versions of these.