Sökning: "Velocity map imaging spectrometer"

Hittade 5 avhandlingar innehållade orden Velocity map imaging spectrometer.

  1. 1. An Intense Attosecond Light Source - from Generation to Application

    Författare :Linnea Rading; Lund University.; Lunds universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; High-order Harmonic Generation; Intense XUV pulses; Velocity map imaging spectrometer; Fysicumarkivet A:2017:Rading;

    Sammanfattning : Short and intense XUV pulses are important tools to study ultrafast dynamics and non-linear processes in matter. These pulses can be generated by free electron lasers (FELs) or by high-order harmonic generation (HHG), which are two complementary techniques. LÄS MER

  2. 2. Investigation of Ultrafast Molecular Dynamics via Covariance Mapping : A Tool for Intense XUV Light Sources

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Jan Lahl; Lund University.; Lunds universitet.; [2019-03-04]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Covariance; Ultrafast; High-order harmonic generation; Extreme Ultraviolet; Pump probe; FLASH; Velocity map imaging; wavefront; FEL; photodissociation; Coulomb explosion; Fysicumarkivet A:2019:Lahl;

    Sammanfattning : The study of molecular dynamics involves observations of the motion of nuclei and electrons. While nuclear motion is usually on the picosecond or femtosecond timescale, attosecond precision is necessary to directly observe the motion of electrons. LÄS MER

  3. 3. An Intense Attosecond Light Source - Towards Extreme Ultraviolet Pump-Probe Experiments

    Detta är en avhandling från Department of Physics, Lund University

    Författare :Filippo Campi; Lund University.; Lunds universitet.; [2017-10-23]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Attosecond; Femtosecond; Ultrashort; Ultrafast; High-order Harmonic Generation; pump probe; XUV; Fysicumarkivet A:2017:Campi;

    Sammanfattning : This thesis presents important steps towards performing high-intensity attosecond pump-probe experiments at the Lund high-intensity extreme ultraviolet (XUV) beamline, which followed two complementary paths: maximization of the XUV intensity available in the interaction region with a gas target, and providing attosecond temporal resolution.To maximize the energy of the XUV pulses generated via high-order harmonicgeneration (HHG), the macroscopic response of atoms to the driving infrared field was optimized. LÄS MER

  4. 4. Mechanisms of Anion Reactions from the lab to ionospheres

    Detta är en avhandling från Stockholm : Department of Physics, Stockholm University

    Författare :Fredrik Lindén; Stockholms universitet.; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ab initio; anion; complex molecules; cross section; electron transfer; heavy ions; ionosphere; nitriles; quantum chemistry; spectroscopy; kemisk fysik; Chemical Physics;

    Sammanfattning : A multitude of heavy neutral and ionic molecules have been discovered by the Cassini Plasma Spectrometer in the ionosphere of Saturn's largest moon Titan. However, only three cyano anions were explicitly identified there, namely CN-, C3N- and C5N-. LÄS MER

  5. 5. Anions from the lab to ionospheres

    Detta är en avhandling från Stockholm : Department of Physics, Stockholm University

    Författare :Fredrik Lindén; Stockholms universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; kemisk fysik; Chemical Physics;

    Sammanfattning : Anion processes have been in the focus of interest during the last decades, especially due to their importance in planetary ionospheres.  Previous observations done by the Cassini Plasma Spectrometer, detected a multitude of heavy neutral and ionic molecules in the ionosphere of Saturn's moon Titan. LÄS MER