Generation of Coherent VUV and Soft X-rays PDF Download

Author: Stanford University. Center for Materials Research
Publisher:
ISBN:
Category :
Languages : en
Pages : 88

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Author: S. E. Harris
Publisher:
ISBN:
Category :
Languages : en
Pages : 34

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During this reporting period three projects have been active. The first project is a study of three frequency summing in inert gases for the generation of short wavelength radiation. The authors have studied both helium and neon systems; they have concluded that the helium experiment is impractical because of the technical difficulties involved in generating the required wavelength. These difficulties are much less severe for the neon system, because of a natural near-coincidence of a neon non-allowed transition and the 16th harmonic of the Nd:YAG laser frequency. The second project resulted in the first observation of a laser induced inelastic collision. In the experiment, energy was switched from the resonant level of strontium to an excited state level of calcium by the application of a short visible laser pulse. The third project describes studies of thermal velocity charge exchange collisions as a method of selectively exciting strongly forbidden levels of singly ionized column IIA elements, leaving the ground state empty. The authors have successfully demonstrated a charge exchange collisional energy transfer from Mg(+) to the Sr(+)(4(d sup 2)D) metastable level.

Author: Uwe Becker
Publisher: Springer Science & Business Media
ISBN: 146130315X
Category : Science
Languages : en
Pages : 678

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Leading investigators offer the first comprehensive study of gas phase photoionization research in the VUV and soft X-ray regime since the massive employment of synchrotron radiation as a spectroscopic tool. Chapters cover all aspects of photoionization phenomena from total cross sections to highly differentiated measurements such as coincidence experiments and spin-resolved electron spectroscopy. This work is abundant with illustrations.

Author: Stanford University. Microwave Laboratory
Publisher:
ISBN:
Category :
Languages : en
Pages : 2

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Author: Stanford University. Microwave Laboratory
Publisher:
ISBN:
Category :
Languages : en
Pages : 154

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Author: Pierre Jaeglé
Publisher: Springer
ISBN: 0387299904
Category : Science
Languages : en
Pages : 414

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Extreme ultraviolet radiation, also referred to as soft X-rays or XUV, offers very special optical properties. The X-UV refractive index of matter is such that normal reflection cannot take place on polished surfaces whereas beam transmission through one micrometer of almost all materials reduces to zero. Therefore, it has long been a difficult task to imagine and to implement devices designed for complex optics experiments in this wavelength range. Thanks to new sources of coherent radiation - XUV-lasers and High Order Harmonics - the use of XUV radiation, for interferometry, holography, diffractive optics, non-linear radiation-matter interaction, time-resolved study of fast and ultrafast phenomena and many other applications, including medical sciences, is ubiquitous.

Author: Stanford University. Center for Materials Research
Publisher:
ISBN:
Category :
Languages : en
Pages : 6

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Author:
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ISBN:
Category :
Languages : en
Pages :

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Magnetic structures in modern storage rings provide an assured route to fundamentally new opportunities for extending coherent radiation experiments to the vacuum ultraviolet and soft x-ray spectral regions. Coherent power levels of order 10 milliwatts are anticipated, in a fully spatially coherent beam, with a longitudinal coherence length of order 1 .mu.m. In addition to broad tuneability and polarization control, the radiation would occur in 20 psec pulses, at 500 MHz repetition rate.

Author: David Attwood
Publisher: Cambridge University Press
ISBN: 1139643428
Category : Technology & Engineering
Languages : en
Pages : 611

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This detailed, comprehensive book describes the fundamental properties of soft X-rays and extreme ultraviolet (EUV) radiation and discusses their applications in a wide variety of fields, including EUV lithography for semiconductor chip manufacture and soft X-ray biomicroscopy. The author begins by presenting the relevant basic principles such as radiation and scattering, wave propagation, diffraction, and coherence. He then goes on to examine a broad range of phenomena and applications. The topics covered include spectromicroscopy, EUV astronomy, synchrotron radiation, and soft X-ray lasers. The author also provides a wealth of useful reference material such as electron binding energies, characteristic emission lines and photo-absorption cross-sections. The book will be of great interest to graduate students and researchers in engineering, physics, chemistry, and the life sciences. It will also appeal to practising engineers involved in semiconductor fabrication and materials science.

Author:
Publisher:
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Category :
Languages : en
Pages :

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High-brightness electron storage rings and permanent-magnet technology provide a basis for the development of coherent radiation in the 10- to 1000-A (xuv) spectral range. The most assured route to the production of coherent x-rays and vuv is the simple interaction between properly constrained relativistic electrons and permanent-magnet undulators, a subject that is already well understood and where technology is well advanced. Other techniques are less well developed, but with increasing degrees of technical challenge they will provide additional coherence properties. Transverse optical klystrons (TOKs) provide an opportunity for additional coherence at certain harmonics of longer-wavelength lasers. Free electron lasers (FELs) extend coherence capabilities substantially through two possible routes: one is the development of suitable mirror coatings. Both FEL techniques would provide vuv radiation and soft x rays with extremely narrow spectral content. Research on all of these techniques (undulators, TOKs, and FELs) is possible in a single facility based on a high-brightness electron storage ring, referred to herein as a Coherent xuv Facility (CXF). Individual items from the report were prepared separately for the data base.