Patent Number: 
Section: claims

1. A system, comprising:a first chamber including an inlet and an outlet for a first material, the first chamber being configured to receive the first material from a source of the first material through the inlet and to produce light using the first material; anda recycling device coupled to the inlet and the outlet of the first chamber, the recycling device being configured to receive the first material from the outlet of the first chamber and to recycle the first material, so that the first material is re-input through the inlet of the first chamber for further production of light. 2. The system of claim 1, further comprising:a controller that routes the first material to the recycling device and routes the recycled material from the recycling device back to the source of the first material. 3. The system of claim 1, wherein said first material is one of xenon, lithium vapor, tin, krypton, and water vapor. 4. The system of claim 1, wherein the recycling device is positioned outside the first chamber. 5. The system of claim 1, wherein the light comprises extreme ultra violet light. 6. The system of claim 1, wherein the first chamber houses a plasma light source that produces extreme ultra violet light. 7. The system of claim 1, further comprising:a second chamber that includes a second material and that is coupled to the first chamber, the second chamber receiving the produced light; anda lock formed with a third material that flows between the first material and the second material in an area in which they converge. 8. The system of claim 7, wherein said third material is one of helium, neon, and nitrogen. 9. The system of claim 7, wherein:the recycling device separates the first material from the third material, such that the first material is reused to form the produced light. 10. A method, comprising:(a) using a first material to produce extreme ultraviolet radiation within a first chamber of a light source; and(b) reusing the first material in the first chamber to produce extreme ultraviolet radiation. 11. The method of claim 10, wherein said first material is one of xenon, lithium vapor, tin, krypton, and water vapor. 12. The method of claim 10, further comprising:using a second material in a second chamber that receives the radiation produced by the first material; andseparating the first chamber from the second chamber with a third material that flows between them. 13. The method of claim 12, wherein said third material is one of helium, neon, and nitrogen. 14. The method of claim 12, further comprising separating the first material from the third material and reusing the first material. 15. The method of claim 12, wherein said second material reduces contamination on optical elements within a second chamber. 16. The method of claim 12, wherein said second material protects optical elements. 17. The method of claim 10, wherein said steps (a) and (b) happen at a same time. 18. A discharge plasma light source for producing extreme ultraviolet radiation, said source being provided with a first chamber wherein radiation is produced from a first material that is recycled after producing the radiation to be reused for the further production of extreme ultraviolet radiation in the first chamber. 19. The discharge plasma light source of claim 18, wherein the first material is a metal target. 20. The discharge plasma light source of claim 18, wherein the first material is tin.