Patent Number: 
Section: claims

1. A phase controller comprising:a hollow vacuum vessel to be a route for a soft X-ray;a reflection surface formed on an inside of the vacuum vessel and constituted by a transition metal having a core level absorption edge in the vicinity of a wavelength of the soft X-ray;a magnet for generating a magnetic field in a perpendicular direction to a longitudinal direction of the vacuum vessel in a position where the soft X-ray is to be reflected by the reflection surface; anda vacuum pump for bringing a vacuum state in the vacuum vessel,wherein the soft X-ray to be linearly polarized light is incident in the vacuum vessel set into the vacuum state by means of the vacuum pump and is reflected at least once over the reflection surface in a position where the magnetic field is applied so that the soft X-ray having a phase controlled is emitted from the vacuum vessel. 2. The phase controller according to claim 1, wherein the soft X-ray to be the linearly polarized light is incident in the vacuum vessel set into the vacuum state by means of the vacuum pump and is reflected at plural times over the reflection surface in the position where the magnetic field is applied so that the soft X-ray converted into circularly polarized light is emitted from the vacuum vessel. 3. The phase controller according to claim 2, further comprising a second reflection surface which is formed in a perpendicular direction to the reflection surface in a subsequent part to the reflection surface at an inside of the vacuum vessel, and is constituted by the same transition metal as the reflection surface,the soft X-ray to be the linearly polarized light being incident in the vacuum vessel set into the vacuum state by means of the vacuum pump and being reflected at plural times over the reflection surface in the position where the magnetic field is applied, and the soft X-ray being then reflected at plural times over the second reflection surface so that the soft X-ray converted into the circularly polarized light is emitted from the vacuum vessel. 4. The phase controller according to claim 3, wherein the reflection surface and the second reflection surface are formed to have an equal length, and a number of times of reflection over the reflection surface is equal to a number of times of reflection over the second reflection surface.