Author: Sergey Nikitin
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
This PhD research work is devoted to the use of laser ultrasound in high-pressure physics. The research is done using the recently established technique of laser ultrasonic measurements in a diamond anvil cell which allows investigation of the sound propagation and determination of the acoustic wave velocities at ultrahigh pressures. Time domain Brillouin scattering was applied here to depth-profiling of polycrystalline aggregate of ice compressed in a diamond anvil cell to megabar pressures. The technique allowed examination of characteristic dimensions of elastic inhomogeneities and texturing of polycrystalline ice in the direction, normal to the diamond anvil surfaces with sub-micrometer spatial resolution via time-resolved measurements of variations in the propagation velocity of the acoustic pulse travelling in the compressed sample. It was applied to measure the acoustic velocities in H2O ice up to 84 Gpa. The developed imaging technique provides, for each crystallite (or a group of crystallites) in chemically homogeneous transparent aggregate, usable information on its orientation as well as on the value of the elastic modulus along the direction of the sound propagation. This extends the basis for a successful application of highly developed micromechanical models of solids deformation at mbar pressure. On long term, such experiments extended to earth's minerals and high or low temperatures would insure a significant progress in understanding of convection of the earth's mantle and thus evolution of this and other planets.
Laser Ultrasonics in a Diamond Anvil Cell for Investigation of Simple Molecular Compunds at Ultrahigh Pressures
Author: Sergey Nikitin
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
This PhD research work is devoted to the use of laser ultrasound in high-pressure physics. The research is done using the recently established technique of laser ultrasonic measurements in a diamond anvil cell which allows investigation of the sound propagation and determination of the acoustic wave velocities at ultrahigh pressures. Time domain Brillouin scattering was applied here to depth-profiling of polycrystalline aggregate of ice compressed in a diamond anvil cell to megabar pressures. The technique allowed examination of characteristic dimensions of elastic inhomogeneities and texturing of polycrystalline ice in the direction, normal to the diamond anvil surfaces with sub-micrometer spatial resolution via time-resolved measurements of variations in the propagation velocity of the acoustic pulse travelling in the compressed sample. It was applied to measure the acoustic velocities in H2O ice up to 84 Gpa. The developed imaging technique provides, for each crystallite (or a group of crystallites) in chemically homogeneous transparent aggregate, usable information on its orientation as well as on the value of the elastic modulus along the direction of the sound propagation. This extends the basis for a successful application of highly developed micromechanical models of solids deformation at mbar pressure. On long term, such experiments extended to earth's minerals and high or low temperatures would insure a significant progress in understanding of convection of the earth's mantle and thus evolution of this and other planets.
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
This PhD research work is devoted to the use of laser ultrasound in high-pressure physics. The research is done using the recently established technique of laser ultrasonic measurements in a diamond anvil cell which allows investigation of the sound propagation and determination of the acoustic wave velocities at ultrahigh pressures. Time domain Brillouin scattering was applied here to depth-profiling of polycrystalline aggregate of ice compressed in a diamond anvil cell to megabar pressures. The technique allowed examination of characteristic dimensions of elastic inhomogeneities and texturing of polycrystalline ice in the direction, normal to the diamond anvil surfaces with sub-micrometer spatial resolution via time-resolved measurements of variations in the propagation velocity of the acoustic pulse travelling in the compressed sample. It was applied to measure the acoustic velocities in H2O ice up to 84 Gpa. The developed imaging technique provides, for each crystallite (or a group of crystallites) in chemically homogeneous transparent aggregate, usable information on its orientation as well as on the value of the elastic modulus along the direction of the sound propagation. This extends the basis for a successful application of highly developed micromechanical models of solids deformation at mbar pressure. On long term, such experiments extended to earth's minerals and high or low temperatures would insure a significant progress in understanding of convection of the earth's mantle and thus evolution of this and other planets.
Laser Heating Setup with High-magnification Imaging for Studies of Physical and Chemical Phenomena Up to Ultra-high Pressures in Diamond Anvil Cells
Physics Briefs
Laser-drilled Holes in Diamond and High Pressure-temperature Phase of Andradite
Author: Christina Susana Colle
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 122
Book Description
International Aerospace Abstracts
Spring Meeting
Author: American Geophysical Union. Meeting
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 544
Book Description
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 544
Book Description
U.S. National Report to International Union of Geodesy and Geophysics, 1979-1982
Author: International Union of Geodesy and Geophysics. General Assembly
Publisher:
ISBN:
Category : Geodynamics
Languages : en
Pages : 124
Book Description
Publisher:
ISBN:
Category : Geodynamics
Languages : en
Pages : 124
Book Description
Pressure-Induced Phase Transformations
Author: Daniel Errandonea
Publisher:
ISBN: 9783039368167
Category :
Languages : en
Pages : 224
Book Description
This book is a printed edition of the Special Issue of Crystals entitled Pressure-Induced Phase Transformations. It includes selected articles on the behavior of matter under high-pressure and high-temperature conditions, describing and discussing contemporary achievements, which were selected based on their relevance and scientific quality.
Publisher:
ISBN: 9783039368167
Category :
Languages : en
Pages : 224
Book Description
This book is a printed edition of the Special Issue of Crystals entitled Pressure-Induced Phase Transformations. It includes selected articles on the behavior of matter under high-pressure and high-temperature conditions, describing and discussing contemporary achievements, which were selected based on their relevance and scientific quality.
Bibliography on Cold Regions Science and Technology
Synchrotron Radiation Research
Author: Herman Winick
Publisher: Springer Science & Business Media
ISBN: 1461579988
Category : Medical
Languages : en
Pages : 767
Book Description
This book has grown out of our shared experience in the development of the Stanford Synchrotron Radiation Laboratory (SSRL), based on the electron-positron storage ring SPEAR at the Stanford Linear Accelerator Center (SLAC) starting in Summer, 1973. The immense potential of the photon beam from SPEAR became obvious as soon as experiments using the beam started to run in May, 1974. The rapid growth of interest in using the beam since that time and the growth of other facilities using high-energy storage rings (see Chapters 1 and 3) demonstrates how the users of this source of radiation are finding applications in an increasingly wide variety of fields of science and technology. In assembling the list of authors for this book, we have tried to cover as many of the applications of synchrotron radiation, both realized already or in the process of realization, as we can. Inevitably, there are omissions both through lack of space and because many projects are at an early stage. We thank the authors for their efforts and cooperation in producing what we believe is the most comprehensive treatment of synchrotron radiation research to date.
Publisher: Springer Science & Business Media
ISBN: 1461579988
Category : Medical
Languages : en
Pages : 767
Book Description
This book has grown out of our shared experience in the development of the Stanford Synchrotron Radiation Laboratory (SSRL), based on the electron-positron storage ring SPEAR at the Stanford Linear Accelerator Center (SLAC) starting in Summer, 1973. The immense potential of the photon beam from SPEAR became obvious as soon as experiments using the beam started to run in May, 1974. The rapid growth of interest in using the beam since that time and the growth of other facilities using high-energy storage rings (see Chapters 1 and 3) demonstrates how the users of this source of radiation are finding applications in an increasingly wide variety of fields of science and technology. In assembling the list of authors for this book, we have tried to cover as many of the applications of synchrotron radiation, both realized already or in the process of realization, as we can. Inevitably, there are omissions both through lack of space and because many projects are at an early stage. We thank the authors for their efforts and cooperation in producing what we believe is the most comprehensive treatment of synchrotron radiation research to date.