Abstract:
This invention relates to novel methods of producing flat and curved optical elements with laterally and depth graded multilayer thin films, in particular multilayers of extremely high precision, for use with soft and hard x-rays and neutrons and the optical elements achieved by these methods. In order to improve the performance of an optical element, errors in d spacing and curvature are isolated and subsequently compensated.
Abstract:
An X-ray lithography device which utilizes a Kumakhov lens is disclosed. This device is capable of using both small area sources and synchrotron sources. This device provides improved X-ray control, precision and accuracy. Also provided is a method of X-ray lithograph which incorporates a Kumakhov lens.
Abstract:
A thin, flexible, hollow fiber capable of transmitting ionizing radiation. Ionizing radiation enters the fiber through entrance pupil (10) and travels through the hollow interior of fiber body (20) by reflecting and scattering off the inner wall of the fiber, frequently at grazing incidence angles. Fiber body (20) is covered at one end by thin film cap (30) which is thin enough to be at least semitransparent to ionizing radiation, but which is also strong enough to allow air to be withdrawn from fiber body (20) at the opposite uncapped end. Small obstructions (32) at the exit end of the fiber can be used to spread the beam of ionizing radiation to a desirable width. A flexible fiber capable of transmitting ionizing radiation has important applications in medicine for the radiation therapy of tumors. Applications also exist in communications and other fields.
Abstract:
A graphite monochromator for X-rays and neutrons which uses a graphitized product obtained by graphitizing a polymer film in an inert atmosphere at a temperature of 2,000.degree. to 3,500.degree. C., which has an extremely excellent plane orientation, and has an excellent smoothness and a mosaic spread of 4.degree. or less.
Abstract:
This invention provides an artificial monochromator crystal for efficiently selecting a narrow band of neutron wavelengths from a neutron beam having a Maxwellian wavelength distribution, by providing on a substrate a plurality of germanium layers, and alternate periodic layers of a different metal having tailored thicknesses, shapes, and volumetric and neutron scattering densities.
Abstract:
Disclosed are apparatus and methods for controlling radiation, such as a beam of neutrons, low energy gamma rays, X-rays, or electrons, by means of successive diffractions by diffracting media, such as crystals, vibrating in a compression mode in a shear mode or in a complex superimposed vibrational mode. The radiation beam may be subjected to successive diffractions by an arrangement of such vibrating diffracting media and may thus be contained in a substantially closed path such as a hexagonal path or a figure-eight path. Alternatively, the radiation beam may be subjected to one or more diffractions by an arrangement of such vibrating diffracting media for the purpose of controlling the beam in a non-closed path.
Abstract:
A beam of neutrons passes through a hole disposed in a stationary shield and an opening disposed in a rotatable shield contained within the stationary shield and opposed to and diverging toward the hole. The beam impinges upon a crystal positioned within the rotatable shield. The crystal reflects the incident neutrons to form a beam of monochromatic neutrons which, in turn, passes through a radial hole disposed in the rotatable shield and a circumferentially wide slot disposed in the stationary shield and the beam of monochromatic neutrons is taken out from the slot.
Abstract:
A dispersed release of neutrons is generated from a source. A portion of this dispersed neutron release is reflected by surfaces of a plurality of nested, axisymmetric mirrors in at least an inner mirror layer and an outer mirror layer, wherein the neutrons reflected by the inner mirror layer are incident on at least one mirror surface of the inner mirror layer N times, wherein N is an integer, and wherein neutrons reflected by the outer mirror are incident on a plurality of mirror surfaces of the outer layer N+i times, where i is a positive integer, to redirect the neutrons toward a target. The mirrors can be formed by a periodically reversed pulsed-plating process.