Method and apparatus for filtering high-frequency electromagnetic beams and irradiation apparatus or device for irradiating an object

摘要

A method and an apparatus for filtering radio-frequency electromagnetic beams, in particular x-rays, include a fluid container containing a ferrofluid which at least partially absorbs the electromagnetic beams. A distribution of the ferrofluid within the fluid container can be varied by using an applied magnetic gradient field. An irradiation apparatus and a device for irradiating an object are also provided.

主权项

1. A filter apparatus for filtering X-ray radiation, the filter apparatus comprising:
a fluid container; and a ferrofluid disposed in said fluid container; and at least one magnet for applying a magnetic gradient field to said ferrofluid; said ferrofluid configured to at least partially absorb the X-ray radiation; and said ferrofluid having a distribution within said fluid container being laterally variable in a first lateral direction and in a second lateral direction with respect to a direction of the X-ray radiation by the magnetic gradient field applied by said at least one magnet, wherein the second lateral direction is orthogonal to the first lateral direction.