Author: National Aeronautics and Space Adm Nasa
Publisher: Independently Published
ISBN: 9781792084720
Category : Science
Languages : en
Pages : 26
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Book Description
This final report summarizes our past activities and discusses the work performed over the period of 1 April 1990 through 1 April 1991 on x-ray optics, soft x-ray (0.1 - 10 KeV) imaging detectors, and hard x-ray (10 - 300 KeV) imaging detectors. If microchannel plates (MCPs) can be used to focus x-rays with a high efficiency and good angular resolution, they will revolutionize the field of x-ray optics. An x-ray image of a point source through an array of square MCP pores compared favorably with our ray tracing model for the MCP. Initial analysis of this image demonstrates the feasibility of MCPs for soft x-rays. Our work continues with optimizing the performance of our soft x-ray MCP imaging detectors. This work involves readout technology that should provide improved MCP readout devices (thin film crossed grid, curved, and resistive sheets), defect removal in MCPs, and photocathode optimization. In the area of hard x-ray detector development we have developed two different techniques for producing a CsI photocathode thickness of 10 to 100 microns, such that it is thick enough to absorb the high energy x-rays and still allow the photoelectrons to escape to the top MCP of a modified soft x-ray imaging detector. The methods involve vacuum depositing a thick film of CsI on a strong back, and producing a converter device that takes the place of the photocathode. Murray, S. S. and Schwartz, D. A. NASA-CR-193653, NAS 1.26:193653 NAG5-605...
Author: Swapan K. Saha
Publisher: CRC Press
ISBN: 9814613282
Category : Science
Languages : en
Pages : 590
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Book Description
Interferometric observations need snapshots of very high time resolution of the order of (i) frame integration of about 100 Hz or (ii) photon-recording rates of several megahertz (MHz). Detectors play a key role in astronomical observations, and since the explanation of the photoelectric effect by Albert Einstein, the technology has evolved rather
Author: Jun Park
Publisher: World Scientific
ISBN: 9814547042
Category :
Languages : en
Pages : 214
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Book Description
This volume addresses four major topical areas: imaging detectors for astrophysics application, noble liquid compound, medical application and high energy application.Noble liquid and scintillating fiber technology, which opened a new era in high spatial (energy) resolution, high speed detection of charged particles and gamma rays, is developing further and its application seems to be concentrated in three major directions: astrophysics, high energy physics and medical imaging. In addition, the book covers new developments in imaging photon detectors, hybrid type (fiber and noble liquid) detectors for WIMP search and several promising techniques for new imaging detectors.
Author: G. W. Fraser
Publisher: Cambridge University Press
ISBN: 9780521106030
Category : Science
Languages : en
Pages : 0
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First published in 1989, this book provides a comprehensive review of the detection techniques that are used in X-ray astronomy. Since the first discovery of a cosmic X-ray source in 1962, there has been rapid growth in X-ray astronomy, which has largely been made possible by enormous advances in the capabilities of photon counting instrumentation. The book describes the first 25 years of astronomical X-ray instrumentation and summarises the areas of current detector research, giving particular emphasis to imaging devices and to non-dispersive devices of high spectral resolution. It is the first book to give such a comprehensive treatment of the subject, and will provide astronomers with a valuable summary of detection techniques.
Author: Ian S. McLean
Publisher: Springer Science & Business Media
ISBN: 3540765832
Category : Science
Languages : en
Pages : 576
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Book Description
The second edition of Electronic Imaging in Astronomy: Detectors and Instrumentation describes the remarkable developments that have taken place in astronomical detectors and instrumentation in recent years – from the invention of the charge-coupled device (CCD) in 1970 to the current era of very large telescopes, such as the Keck 10-meter telescopes in Hawaii with their laser guide-star adaptive optics which rival the image quality of the Hubble Space Telescope. Authored by one of the world’s foremost experts on the design and development of electronic imaging systems for astronomy, this book has been written on several levels to appeal to a broad readership. Mathematical expositions are designed to encourage a wider audience, especially among the growing community of amateur astronomers with small telescopes with CCD cameras. The book can be used at the college level for an introductory course on modern astronomical detectors and instruments, and as a supplement for a practical or laboratory class.
Author: R. Giacconi
Publisher: Springer Science & Business Media
ISBN: 9400984596
Category : Science
Languages : en
Pages : 331
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Book Description
The meeting of the High Energy Astrophysics Division of the American Astronomical Society, held in Cambridge, Massachusetts on January 28- 30, 1980, marks the coming of age of X-ray astronomy. In the 18 years since the discovery of the first extrasolar X-ray source, Sco X-l, the field has experienced an extremely rapid instrumentation development culminating with the launch on November 13, 1978 of the Einstein Observatory (HEAO-2) which first introduced the use of high resolution imaging telescopes to the study of galactic and extragalactic X-ray sources. The Einstein Observatory instruments can detect sources as faint as 10-7 Sco X-lor about 17 magnitudes fainter. The technological developments in the field have been paralleled by a host of new discoveries: in the early 1960's the detection of 9 "X-ray stars", objects 10 times more luminous in X-rays than the Sun and among the brightest stellar objects at all wavelengths; in the late 1960's and early 1970's the discovery of the nature of such systems which were identified as collapsed stars (neutron stars and black holes) in mass exchange binary systems, and the detection of the first few extragalactic sources.
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Category : Aeronautics
Languages : en
Pages : 728
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Category : Government publications
Languages : en
Pages :
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Category : Government publications
Languages : en
Pages : 1100
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Category : Power resources
Languages : en
Pages : 664
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