Figure 3
A simple one-dimensional thermal-resistor model of the mirror system. In this model q is the heat load and T1 to T5 are the temperatures at various locations in the mirror system. The maximum on the mirror surface is T1, the minimum at the cooled end of the substrate is T2, the substrate–manifold interface is T3, the manifold–coolant interface is T4 and the coolant bulk is T5. The thermal resistances are: conduction in the mirror substrate Rs, contact resistance at the substrate–manifold interface Ri, conduction in the manifold Rm and convection to the coolant bulk temperature Rh. |