A golf club head having a body with a front wall with an opening and a striking plate insert is disclosed herein. The system may also include a cold-plate connected to the cold-rail with the circuit board between the cold-plate and the cold-rail, the cold-plate to remove heat from the circuit board. The reference beam is modulated to shift its frequency. Further provided is a system for producing a wide steel strip with thin slab continuous casting and rolling. Light components that are reflected by the radiation entry surface, etc. Pulsed PECVD eliminates the need for gas actuation and inert purge steps required by atomic layer deposition.