Patent Number: 056152450
Section: claims

1. A monochromator for radiant X-rays comprising a first crystal which has a surface of incidence having a concave letter V-shaped groove and cooling means for flowing a cooling material behind the surface of incidence along the letter V-shaped groove, and a second crystal which has a letter V-shaped convex having a convex letter V-shape to fit the concave letter V-shaped groove. 2. A monochromator for radiant X-rays according to claim 1, wherein said first crystal and said second crystal are arranged in such a manner that the bottom portion of the concave letter V-shaped groove and the tip portion of the letter V-shaped convex are positioned on substantially the same line. 3. A monochromator for radiant X-rays according to claim 1, wherein the angle of the letter V in the letter V-shaped groove and the letter V-shaped convex is substantially 90 degrees. 4. A monochromator for radiant X-rays according to claim 1, wherein the cooling means extends from the bottom portion of said first crystal to a portion just under the bottom portion of the concave letter V-shaped groove, branches off from the portion just under the bottom portion in opposite directions, and extends behind a surface of incidence along the concave letter V-shaped groove. 5. A monochromator for radiant X-rays according to claim 1, wherein the cooling means includes a tubular member which is formed of material having pressure and heat resistance. 6. A monochromator for radiant X-rays according to claim 1, wherein the cooling means uses water and/or liquid metal as a cooling material. 7. A monochromator for radiant X-rays according to claim 6, wherein liquid gallium is used as the liquid metal. 8. A monochromator for radiant X-rays according to claim 1, wherein the cooling means provides a water jet.