Fluidized-bed reactors for producing alane are provided herein. The mirror assembly may generally include a mirror housing configured to support a mirror. , light emitting diode, light source attached to the bridge or integrated into bridge or the injector to provide UV light within or around the injector. The concave surface includes an upper contact surface tangent to a plane that is downwardly convergent with respect to the vertical surface such that a force delivered to the contact surface includes an upward component tending to lift the tang into the tool holder.