Sökning: "Interferometry"

Visar resultat 6 - 10 av 63 uppsatser innehållade ordet Interferometry.

1. 6. Primordial Gravitational Waves and ultra-light Dark Matter in a complex singlet extended Standard Model

   Kandidat-uppsats, Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Författare :Sara Wildenor; [2021]
   Nyckelord :theoretical physics; gravitational waves; dark matter; complex singlet extended standard model; LISA; BBO; DECIGO; Physics and Astronomy;

   Sammanfattning : In this thesis, the consequences of extending the internal symmetries of the standard model with a complex singlet scalar field, are investigated in terms of dark matter phenomenology and the possibility of primordial gravitational wave detection utilizing space based laser interferometry. The scalar potential of the model is constructed with a Z2 symmetry, which allows for the retainment of a linear and a quadratic coupling parameter, as well as a stable dark matter candidate, and an additional non-zero vacuum expectation value for the real component of the scalar field. LÄS MER

3. 7. Detecting Earth-like exoplanets using high-dispersion nulling interferometry

   Master-uppsats, KTH/Tillämpad fysik

   Författare :Germain Garreau; [2021]
   Nyckelord :Applied Physics; Instrumental Optics; Exoplanets Detection; Interferometry; Spectroscopy; Tillämpad fysik; Instrumentoptik; Exoplaneter upptäckt; Interferometri; Spektroskopi;

   Sammanfattning : The detection of Earth-like exoplanets and the characterization of their atmospheres is a challenge one needs to solve to assess their habitability and the presence of life in the universe. If this challenge is still unresolved today, even in the era of giant telescopes, it is mainly because of the very high contrast between these exoplanets and their host star and also their proximity. LÄS MER

4. 8. Seeing Stars - Intensity Interferometry in the Laboratory and on the Ground

   Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

   Författare :Colin Carlile; [2021]
   Nyckelord :Stellar Physics Instrumentation Interferometry Cherenkov Telescope Array Intensity Interferometry; Physics and Astronomy;

   Sammanfattning : Context Since the time of Tycho Brahe astronomy has been an observing science defined by the quality of its instrumentation. The introduction of primitive telescopes by Galileo in 1609 began a period of development of ever-larger telescopes with greater measuring precision. LÄS MER

5. 9. Pulsed Laser Beam Quality Assessment via Phase Retrieval

   Master-uppsats, Lunds universitet/Atomfysik

   Författare :Mattias Ammitzböll; [2021]
   Nyckelord :GSA; phase retrieval; Gerchberg-Saxton; femtosecond; pulsed; laser; beam quality; attosecond; interferometry; Physics and Astronomy;

   Sammanfattning : In the search for a better understanding of the fundamental nature of the atom, the development of femtosecond pulsed laser sources has opened up for many applications, in particular in time-resolved physics. For many of those, like the generation of attosecond pulses through high-order harmonic generation, high intensity is needed and the quality of the beam is a critical factor. LÄS MER

7. 10. Positioning and Tracking of Target Drone

   Master-uppsats, Linköpings universitet/Kommunikationssystem

   Författare :Anna Hanström; Jet Verheij; [2021]
   Nyckelord :Tracking; drone; positioning; UAV; filter; RSSI; Interferometry; Particle filter; Kalman filter;

   Sammanfattning : This master thesis studied methods for tracking and localising a moving target from an autonomous seeker drone. Feasible methods for automatic control of the seeker drone and different antenna configurations were explored as well. Two different tracking filters and two different controllers were tested for this purpose. LÄS MER