Sökning: "applied physics"
Visar resultat 11 - 15 av 806 avhandlingar innehållade orden applied physics.
11. Search for Gamma-ray Lines from Dark Matter with the Fermi Large Area Telescope
Sammanfattning : Dark matter (DM) constitutes one of the most intriguing but so far unresolved issues in physics. In many extensions of the Standard Model of particle physics, the existence of a stable Weakly Interacting Massive Particle (WIMP) is predicted. The WIMP is an excellent DM particle candidate. LÄS MER
12. Resonant Tunneling in Laterally Confined Quantum Structures
Sammanfattning : In the thesis, three-dimensionally confined resonant tunneling structures were studied experimentally. Two approaches were used for obtaining quantum confinement: gate-defined lateral constriction of double barrier structures, and epitaxial growth of self-assembled quantum dots. LÄS MER
13. Fuel ion densities and distributions in fusion plasmas : Modeling and analysis for neutron emission spectrometry
Sammanfattning : Neutrons produced in fusion reactions in a magnetically confined plasma carry information about the distributions and densities of the fuel ions in the plasma. This thesis presents work where various theoretical models of different fuel ion distributions in the plasma are used to calculate modeled components of the neutron energy spectrum. LÄS MER
14. Cryogenic InP High Electron Mobility Transistors in a Magnetic Field
Sammanfattning : The InGaAs-InAlAs-InP high electron mobility transistor (InP HEMT) is the preferred active device used in a cryogenic low noise amplifier (LNA) for sensitive detection of microwave signals. In this thesis it is demonstrated that the InP HEMT, when placed in a magnetic field, has a strong angular dependence in its output current. LÄS MER
15. Octupole collectivity and E1 moments in neutron rich nuclei
Sammanfattning : Spectroscopy of short-lived fission and reaction products has allowed a detailed structural study of neutron rich nuclei just above above 132Sn and 208Pb, respectively. The low-energy structures of 140Xe and 143Ba as well as a handful of neutron rich nuclei in the actinide region were examined. LÄS MER