Patent Number: 
Section: claims

1. A grazing incidence collector (GIC) thermal management assembly that employs the flow of a coolant, comprising:a GIC mirror shell having a reflective inner surface, an opposite outer surface, and first and second mirror ends;a jacket having an inner surface and first and second jacket ends, the jacket and GIC mirror shell having first and second interfaces at the respective first and second mirror and jacket ends to define a fluidly sealed chamber between the inner surface of the jacket and the outer surface of the GIC mirror shell, the sealed chamber having input and output ends that define respective input and output plenums having respective input and output apertures; andan open-cell heat transfer (OCHT) material contained within the sealed chamber and that substantially fills the sealed chamber, the OCHT material being thermally connected to the outer surface of the GIC mirror shell and the inner surface of the jacket and serving to support the flow of the coolant therethrough from the input plenum to the output plenum. 2. The GIC thermal management assembly of claim 1, wherein the OCHT material is mechanically connected to the GIC mirror shell and the jacket. 3. The GIC thermal management assembly of claim 1, wherein the coolant is one of a liquid and a gas. 4. The GIC thermal management assembly of claim 1, wherein at least one of the first and second interfaces comprises a compliant feature. 5. The GIC thermal management assembly of claim 4, wherein the compliant feature is configured to be compliant when subject to forces associated with assembling the GIC thermal management assembly but substantially non-compliant when subjected to hydrostatic forces associated with said flow of coolant through the chamber and the OCHT material. 6. The GIC thermal management assembly of claim 5, wherein the compliant feature is formed from the same material as the jacket. 7. The GIC thermal management assembly of claim 5, wherein the compliant feature comprises an epoxy. 8. The GIC thermal management assembly of claim 6, wherein the compliant feature includes a plurality of grooves formed in the jacket at one or both jacket ends. 9. The GIC thermal management assembly of claim 6, wherein the jacket and the GIC mirror shell are either welded together or epoxied together. 10. The GIC thermal management assembly of claim 1, wherein the OCHT material comprises as least one of: a metal foam, one or more springs, and a metal mesh. 11. The GIC thermal management assembly of claim 10, wherein the OCHT material comprises metal foam having a pore density of between 20 pores per inch (PPI) and 100 PPI. 12. The GIC thermal management assembly of claim 10, wherein the OCHT material comprises metal foam, and the metal foam comprises at least one of Al, C, SiC, Cu and Ni. 13. The GIC thermal management assembly of claim 1, wherein the interfaced jacket and GIC mirror shell has a width at respective leading and trailing edges of between 3 mm and 10 mm. 14. The GIC thermal management assembly of claim 1, wherein the OCHT material is thermally contacted to the inner surface of the jacket with intermediate contact layers. 15. The GIC thermal management assembly of claim 14, wherein the intermediate contact layers provide a mechanical bond between the OCHT material, the GIC mirror shell and the jacket. 16. The GIC thermal management assembly of claim 1, wherein the interfaced jacket and GIC mirror shell defines a GIC cooling structure having a leading end and a trailing end, and where the leading end includes a shield. 17. The GIC thermal management assembly of claim 16, wherein the shield comprises a cooled ring. 18. The GIC thermal management assembly of claim 16, wherein the shield includes an inner surface adjacent the leading end and an opposite outer surface, the shield further comprising either tungsten or a molybdenum layer. 19. The GIC thermal management assembly of claim 1, further comprising:input and output coolant lines fluidly respectively attached to the input and output plenums. 20. A thermally managed GIC mirror system, comprising:the GIC thermal management assembly of claim 19; anda coolant supply unit fluidly connected to the input and output coolant lines and configured to provide the fluid of the coolant under pressure to the input plenum via the input coolant line and receive the fluid of the coolant from the output plenum via the output coolant line. 21. The thermally managed GIC mirror system of claim 20, further comprising the input and output plenums being configured to provide coolant to and receive coolant from the OCHT material in an azimuthally symmetric manner. 22. The thermally managed GIC mirror system of claim 21, further comprising the system having a pressure drop along the azimuthal direction of the input and output plenums of less than 2 bar. 23. The thermally managed GIC mirror system of claim 22, wherein the coolant has a flow rate between the input and output plenums of between 5 liters per minute and 60 liters per minute. 24. The thermally managed GIC mirror system according to claim 20, further comprising multiple GIC thermal management assemblies fluidly connected to the coolant supply unit, wherein the GIC mirror shells are configured in a nested configuration. 25. An extreme ultraviolet (EUV) lithography system for illuminating a reflective reticle, comprising:a source of EUV radiation;the thermally managed GIC mirror system of claim 20 configured to receive the EUV radiation and form collected EUV radiation; andan illuminator configured to receive the collected EUV radiation and form condensed EUV radiation for illuminating the reflective reticle. 26. The EUV lithography system of claim 25 for forming a patterned image on a photosensitive semiconductor wafer, further comprising:a projection optical system arranged downstream of the reflective reticle and configured to receive reflected EUV radiation from the reflective reticle and form therefrom the patterned image on the photosensitive semiconductor wafer.