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Download or read book Autoionization Spectra of Gases Observed in the Vacuum Ultraviolet written by Robert E. Huffman and published by . This book was released on 1964 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author: Robert E. Huffman
Publisher:
Published: 1964
Total Pages: 45
ISBN-13:
DOWNLOAD EBOOKThis report first gives a brief introduction and survey of the previous work on discrete structure in the ionization continua of atomic gases observed by absorption spectroscopy at photon energies less than about 20 ev (600 A). The discrete structure observed is generally due to autoionization. The spectra of metal vapors such as the alkali and alkaline earths, and of the rare gases, argon, krypton, and xenon will be discussed. After this introduction, recent measurements in this laboratory of the absorption coefficients (cross sections) of the rare gases argon, krypton, and xenon will be discussed. Measurements were obtained down to 600 A with a photoelectric scanning technique using a helium continuum background at a bandwidth of 0.5 A. This bandwidth was sufficient to resolve the earlier members of the intense, diffuse, asymmetrical absorption line series originally found by Beutler between the 2P3/2 ground state and the 2P1/2 excited state of the ion. These measurements will be discussed and compared with other recent theoretical and experimental investigations. Finally, a compilation of references to papers on autoionization spectra arranged according to element and complete up to January 1964 is included. (Author).
Download or read book Autoionization Spectra of Gases Observed in the Vacuum Ultraviolet written by Robert E. Huffman and published by . This book was released on 1964 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report first gives a brief introduction and survey of the previous work on discrete structure in the ionization continua of atomic gases observed by absorption spectroscopy at photon energies less than about 20 ev (600 A). The discrete structure observed is generally due to autoionization. The spectra of metal vapors such as the alkali and alkaline earths, and of the rare gases, argon, krypton, and xenon will be discussed. After this introduction, recent measurements in this laboratory of the absorption coefficients (cross sections) of the rare gases argon, krypton, and xenon will be discussed. Measurements were obtained down to 600 A with a photoelectric scanning technique using a helium continuum background at a bandwidth of 0.5 A. This bandwidth was sufficient to resolve the earlier members of the intense, diffuse, asymmetrical absorption line series originally found by Beutler between the 2P3/2 ground state and the 2P1/2 excited state of the ion. These measurements will be discussed and compared with other recent theoretical and experimental investigations. Finally, a compilation of references to papers on autoionization spectra arranged according to element and complete up to January 1964 is included. (Author).
Download or read book Absorption Spectra of H2 in the Vacuum Ultraviolet Region written by Takeshi Namioka and published by . This book was released on 1965 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Absorption Spectrum of Electrically Excited Nitrogen Molecules in the Vacuum-uv Region written by M. Ogawa and published by . This book was released on 1965 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Helium Continuum Afterglow in the Vacuum Ultraviolet written by Robert E. Huffman and published by . This book was released on 1965 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wave Phenomena in Ionized Gases written by Cap Haskell and published by . This book was released on 1965 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author: J. F. McIlvenna
Publisher:
Published: 1965
Total Pages: 66
ISBN-13:
DOWNLOAD EBOOKThe mapping of extended, cultural ground targets by an airborne radar is examined using communication theory concepts including those of the antenna transfer function and the target spatial frequency spectrum. Use of the set of transfer functions that correspond to Taylor aperture distributions and specification of the targets directly in terms of their spatial frequency spectra, permits one to examine the antenna images for quality and resolution. The results obtained indicate that resolution for a class of ground targets can be much better than is predicted by the two-point Rayleigh resolution criterion. It is also true that there can be situations in which the shape of the antenna images are quite independent of the radiation pattern. Several types of spatial noise were also included in the input spectrum to investigate noise effects on image quality and resolution. (Author).
Download or read book On the Resolving Power of Ground Mapping Radar Antennas written by J. F. McIlvenna and published by . This book was released on 1965 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mapping of extended, cultural ground targets by an airborne radar is examined using communication theory concepts including those of the antenna transfer function and the target spatial frequency spectrum. Use of the set of transfer functions that correspond to Taylor aperture distributions and specification of the targets directly in terms of their spatial frequency spectra, permits one to examine the antenna images for quality and resolution. The results obtained indicate that resolution for a class of ground targets can be much better than is predicted by the two-point Rayleigh resolution criterion. It is also true that there can be situations in which the shape of the antenna images are quite independent of the radiation pattern. Several types of spatial noise were also included in the input spectrum to investigate noise effects on image quality and resolution. (Author).
Author: Daniel J. Jacavanco
Publisher:
Published: 1965
Total Pages: 22
ISBN-13:
DOWNLOAD EBOOKAntenna patterns (E-plane) of an X-band horn mounted in a ground plane and covered by a plasma slab were measured. A pulsed plasma was produced by capacitor discharge in a rectangular pyrex container of 6 in. x 2 in. x 24 in. i.d. Microwave interferometer measurements of the electron density were made at 9 and 35 Gc. Antenna patterns are presented which show a sharp decrease in radiated power at certain angles corresponding to the 'optics critical angle'. Good agreement is obtained for the movement of the optics critical angle with plasma density. (Author).
Download or read book Electromagnetic Properties of a Plasma-covered Antenna written by Daniel J. Jacavanco and published by . This book was released on 1965 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antenna patterns (E-plane) of an X-band horn mounted in a ground plane and covered by a plasma slab were measured. A pulsed plasma was produced by capacitor discharge in a rectangular pyrex container of 6 in. x 2 in. x 24 in. i.d. Microwave interferometer measurements of the electron density were made at 9 and 35 Gc. Antenna patterns are presented which show a sharp decrease in radiated power at certain angles corresponding to the 'optics critical angle'. Good agreement is obtained for the movement of the optics critical angle with plasma density. (Author).
Author: E. A. Lewis
Publisher:
Published: 1965
Total Pages: 18
ISBN-13:
DOWNLOAD EBOOKA nearly vertical antenna wire varying in length from 3000 to 8000 ft was shock-excited by a high-voltage source. The resulting radiation fields were received at distances of about 600 km by two stations separated laterally so as to subtend an angle of about 15© at the source. The difference in wavefront arrival times at the two stations, observed for 101 transmissions, showed an average absolute deviation from the mean of about only 1/2 [mu]s. This figure includes the effects of possible source asymmetries, sferics noise, instrumental errors, and wave propagation. Typical oscillograms of antenna currents and radiation fields are given. It is shown that the amplitudes and durations of the pulse envelopes, the amplitudes and durations of the first half-cycles, and the quasi-frequencies of the pulses are in good agreement with a theory that takes energy losses into account.
Download or read book Waveforms and Relative Phase Stability of Transients Radiated from a Helicopter-supported Antenna Wire written by E. A. Lewis and published by . This book was released on 1965 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A nearly vertical antenna wire varying in length from 3000 to 8000 ft was shock-excited by a high-voltage source. The resulting radiation fields were received at distances of about 600 km by two stations separated laterally so as to subtend an angle of about 15© at the source. The difference in wavefront arrival times at the two stations, observed for 101 transmissions, showed an average absolute deviation from the mean of about only 1/2 [mu]s. This figure includes the effects of possible source asymmetries, sferics noise, instrumental errors, and wave propagation. Typical oscillograms of antenna currents and radiation fields are given. It is shown that the amplitudes and durations of the pulse envelopes, the amplitudes and durations of the first half-cycles, and the quasi-frequencies of the pulses are in good agreement with a theory that takes energy losses into account.
Download or read book Phonon Generation by Stripe-domain Resonance in Permalloy Films written by Marden H. Seavey and published by . This book was released on 1965 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
