منابع مشابه
A focusing telescope for gamma-ray astronomy
With the development of the Laue Lens, gamma-ray astronomy is presently realizing the step that virtually all branches of astronomy have accomplished since Lippershey’s invention 400 years ago: the focusing telescope. In a Laue lens, gamma-rays interact coherently inside a crystal via Bragg-diffraction; a large number of diffraction crystals are oriented in a way to deviate incident photons ont...
متن کاملX-ray multilayer monochromator with enhanced performance.
An x-ray multilayer monochromator with improved resolution and a low specular background is presented. The monochromator consists of a lamellar multilayer amplitude grating with appropriate parameters used at the zeroth diffraction order. The device is fabricated by means of combining deposition of thin films on a nanometer scale, UV lithography, and reactive ion etching. The performance of thi...
متن کاملUltrahigh energy resolution focusing monochromator for inelastic x-ray scattering spectrometer.
A further development of a focusing monochromator concept for X-ray energy resolution of 0.1 meV and below is presented. Theoretical analysis of several optical layouts based on this concept was supported by numerical simulations performed in the "Synchrotron Radiation Workshop" software package using the physical-optics approach and careful modeling of partially-coherent synchrotron (undulator...
متن کاملThe Swift X-ray Telescope
The Swift Gamma-Ray Explorer is designed to make prompt multiwavelength observations of Gamma-Ray Bursts (GRBs) and GRB afterglows. The X-ray Telescope (XRT) enables Swift to determine GRB positions with a few arcseconds accuracy within 100 seconds of the burst onset. The XRT utilizes a mirror set built for JET-X and an XMM-Newton/EPIC MOS CCD detector to provide a sensitive broad-band (0.2-10 ...
متن کاملFast optical metrology of the hard x-ray optics for the High Energy Focusing Telescope (HEFT) †
We describe a fast figure metrology system designed for the several thousand mirror quadrants in the High Energy Focusing Telescope (HEFT) balloon experiment. HEFT's multilayer coated hard x-ray optics will have ~ 1 arcminute HEW and operate at 20-80 keV. The optics are a conical approximation to the Wolter-I configuration. Our automated system can measure the axial figure error, in-phase and o...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1972
ISSN: 0252-9211
DOI: 10.1017/s0252921100090035