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Goal:

High laser power can cause thermal stresses on the optical lens that is positioned in the cutters head. Due to the x-y-z movement of the head, a small, lightweight and high-power cooling solution was required to retain the laser specifications.

Cutter head

Approach:

Cryogenic high-power cooling is implement to retain the cutters head within acceptable thermal boundaries. Because of the high-temperature gradient, a lot of power could be transported within a relatively small surface area. The thermal design is made using fast dynamic LEM methods. The final design is analyzed and performance is validated using extensive numerical methods (FEM).

LEM model cryo-cooled laser head

Results:

A thermal layout was made of the cryogenic cooling system which consisted of a open cryogen-loop system using liquid nitrogen. This layout was optimized for the required LN2 mass flow and optimal thermal interfacing.

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