Search for dissertations about: "lattice dynamic"

Showing result 1 - 5 of 32 swedish dissertations containing the words lattice dynamic.

  2. 1. Studies for the Low Emittance MAX-IV Storage Rings

    Author : Hamed Tarawneh; Lunds universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics; Touschek losses; energy acceptance; dynamic aperture; Lattice; emittance;

    Abstract : This thesis discusses the feasibility of a low emittance lattice proposed for the MAX-IV storage rings. The MAX-IV facility will have two storage rings that are identical but operated at two different energies, 1.5 GeV for soft X-ray and 3 GeV for hard X-ray production. READ MORE

  4. 2. Intrinsic tunneling spectroscopic investigations of Bi2Sr2CaCu2O8+x superconductors : The fluxon lattice, resonant phenomena,flux-flow and current doping

    Author : Holger Motzkau; Vladimir M. Krasnov; Paul Müller; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In this thesis, the tunneling between individual atomic layers in structures of Bi2Sr2CaCu2O8+x based high-temperature superconductors are experimentally studied employing the intrinsic Josephson effect. A special attention is paid on the fabrication of small mesa structures using micro and nanofabrication techniques. READ MORE

  5. 3. Development and application of techniques for predicting and analysing phonon-derived materials properties

    Author : Fredrik Eriksson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Lattice Thermal Conductivity; Force Constants; Green- Kubo; Peierls-Boltzmann Transport; Molecular Dynamics;

    Abstract : The thermodynamic properties of materials are of great interest for both scientists and engineers. A large contribution to many properties stems from the vibrational motion of the atoms in the material. An understanding of the dynamics of the vibrating atoms is therefore important for many other areas as well, including, e.g. READ MORE

  6. 4. Method Development for Computer Aided Engineering for Aircraft Conceptual Design

    Author : Adrien Bérard; Arthur Rizzi; Dieter Scholz; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aircraft conceptual design; Computer Aided Design CAD ; buffet onset; unsteady vortex-lattice method; Vehicle engineering; Farkostteknik;

    Abstract : This thesis presents the work done to implement new computational tools and methods dedicated to aircraft conceptual design sizing and optimization. These tools have been exercised on different aircraft concepts in order to validate them and assess their relevance and applicability to practical cases. READ MORE

  7. 5. Some aspects of the slow motion problem in the NMR-relaxation theory : a theoretical study of high spin systems

    Author : Per-Olof Westlund; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : A theory of nuclear spin relaxation in paramagnetic complexes, allowing for the electron spin relaxation to be in the slow motion regime, is presented. The lattice i3 described in terms of the electron Zeeman interaction, a zero field splitting (ZFS) and a Markov operator for the relevant classical degrees of freedom. READ MORE