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:
Transmission X-ray gratings (100) include a periodically stepped surface having a plurality of steps (104-109). A multilayer coating (114-119) is situated on each step in one set of substantially parallel step surfaces. The multilayer coating can be a series of alternating bilayers having different complex refractive indices at X-ray wavelengths. In one example, an etched silicon substrate (102) having periodic steps in a surface is provided with suitable multilayer coatings having a common height (H) selected to correspond to a step height. A cap layer is formed over the multilayer coatings, so that the resultant X-ray grating has opposing parallel surfaces (124,126).
Abstract:
An X-ray waveguide includes a core (101) to guide X-rays in a wavelength band where the real part of the refractive index of a material is 1 or less, and a cladding (102) to confine the X-rays to the core, in which the core includes a periodic structure having basic structures that contain materials having different real parts of refractive indices, the basic structures being periodically arranged, a low electron density layer (103) is arranged between the core and the cladding and has a lower electron density than that of a material having the highest electron density of all the materials constituting the core, and the critical angle for total reflection of the X-rays at the boundary between the cladding and the low electron density layer is larger than the Bragg angle attributed to the periodicity of the basic structures in the periodic structure of the core.
Abstract:
An optical collector (15) for collecting extreme ultraviolet radiation or EUV light generated at a central EUV production site comprises a reflective shell (25). To cope with the thermal loading of the collector and thereby avoid deformations, the reflective shell (25) preferably is mounted on and supported by a support structure (24), such that a cooling channel (29) is established between the back side of the reflective shell (25) and the support structure (24), the thickness of the reflective shell (25) is substantially reduced, such that the convective heat transfer between the back side of the reflective shell (25) and a cooling medium (26) flowing through the cooling channel (29) dominates the process of removing heat from the reflective shell (25) with respect to heat conduction, and a cooling circuit (33) is connected to the cooling channel (29) to supply a cooling medium (26) to the cooling channel (29) with a controlled coolant pressure and/or mass flow.
Abstract:
A multi-beam x-ray system includes an x-ray source (24) which emits x-rays and a housing with a first part and a second part. The second part is moveable relative to the first part and includes a plurality of optics (20, 22, 120, 122) of different performance characteristics. Each optic, through the movement of the second part relative to the first part, is positioned to a working position so that the optic receives the x-rays from the x-ray source and directs the x-rays with the desired performance attributes to a desired location (30).
Abstract:
An x-ray generating system includes a source of x-ray radiation, a waveguide bundle optic for collimating the x-ray radiation produced by the source, a focusing optic for focusing the collimated x-ray radiation to a focal point.
Abstract:
A collector optical system for extreme ultraviolet (EUV) or X-ray applications, including lithography and imaging, for example at 13 5 nm, comprising a grazing incidence collector in combination with a laser produced plasma (LPP) source In one embodiment, one or more further optical elements act upon one or more laser beams used to generate the EUV or X-ray plasma source, whereby said laser beam(s) ιmpact(s) on the fuel target from a side thereof on which an intermediate focus is disposed Also disclosed is a collector for EUV and X-ray applications, in which radiation from a laser produced plasma source is reflected by the collector to an intermediate focus, the line joining the source and intermediate focus defining an optical axis, a first direction on the optical axis being defined from the source to the intermediate focus, characterised by the collector comprising one or more grazing incidence mirrors, and by the collector comprising one or more further optical elements for redirecting a received laser beam so as to be incident upon the source (a) in a second direction, opposite to said first direction, or (b) at an acute angle to said second direction The further optical elements may comprise plane or spherical mirrors and/or lenses, for example disposed on the optical axis Also disclosed is a collector for application at about 13 5 nm with Laser Produced Plasma sources, the collector comprising between 5 and 16 concentrically aligned mirrors, and preferably between 6 and 12 mirrors, that operate at grazing incidence such that the maximum grazing angle between the incident radiation and the reflective surface of the mirrors is about 30°, and more preferably about 25°, in order to allow a maximum collection angle from the source of about 40° to about 85°, and preferably about 45° to about 75° Also disclosed is an EUV lithography system comprising a radiation source, for example a LPP source, the collector, an optical condenser, and a reflective mask
Abstract:
Method for protecting an optical element in a radiation source for electromagnetic radiation with a wavelength in the extreme ultraviolet (XUV) wavelength range, in particular with a wavelength in the wavelength range between 1 nm and 15 nm, this radiation source at least comprising a chamber for receiving therein a plasma generating XUV radiation, the optical element, in particular a collector for bundling XUV radiation generated by the plasma, and a quantity of background gas for scattering between the plasma and the optical element particles exiting the plasma, characterized by admitting into the chamber a quantity of cooling gas for cooling the electrons in a secondary plasma occurring in the vicinity of the optical element, and radiation source provided with inlet means for such a cooling gas.