A real time method for quality control testing of a laser shock peening process of production workpieces by analysis of natural frequency shifts during the laser shock peening process. The clock signal generation section generates a clock signal of a predetermined frequency. The heat exchanger forms a coolant passageway inside the electrostatic chuck, and the refrigerator is disposed outside the process chamber. A grown fluoride crystal is formed by melting and then gradually cooling the fluoride disk in a cylindrical crucible. The support bracket also includes a bushing, such as a C-shaped bushing or a cylindrical bushing, which provides support for the worm gear shaft against the helical gear. The system includes holding \u201cclips\u201d that are deployable on the system \u201crail\u201d by inserting a portion of the clip through a slot in the rail, at substantially any point along the length of the slot.