Sökning: "aberrations"

Visar resultat 1 - 5 av 29 uppsatser innehållade ordet aberrations.

  1. 1. Spectral broadening of 4 mJ femtosecond pulses using a bulk multi-pass cell

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Saga Westerberg; [2023]
    Nyckelord :Lasers; Ultrashort; Nonlinear Optics; femtosecond; Multi-Pass Cell; Spectral broadening; pulse post-compression; Self phase modulation; Physics and Astronomy;

    Sammanfattning : Nonlinear optical effects can be used for spectral broadening, which the basis of the field of post-compression of laser pulses. When the intensity of light becomes high enough the refractive index becomes intensity dependent, and as the intensity often varies both with position and time so does the refractive index. LÄS MER

  3. 2. Design och simulering av en elektronkanon som fasplatta till TEM

    Kandidat-uppsats, KTH/Medicinteknik och hälsosystem

    Författare :Hugo Svenberg; Smyan Sondur; [2023]
    Nyckelord :TEM; Elektronkanon; Elektronfasplatta; COMSOL; Einzel lins; Elektronoptik;

    Sammanfattning : Fasplattorna i transmissionselektronmikroskop (TEM) används i dagsläget för att förbättra kontrasten men har vissa nackdelar som, till exempel, bidrag av brus och låg upplösning. En eventuell lösning till detta problem är en elektronfasplatta som utnyttjar fältpotentialen hos en extern elektronstråle som skapar en potentialövergång för TEM:ets primära elektronstråle vilket skiftar dess fas. LÄS MER

  4. 3. Focal Spot Optimization Using Spatial Light Modulation and a Phase Retrieval Algorithm

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Robert Petersen; [2023]
    Nyckelord :Spatial Light Modulation; Phase Retrieval Algorithm; Focal Spot Optimization; Adaptive Optics; Wavefront Sensing; Lasers; Physics and Astronomy; Technology and Engineering;

    Sammanfattning : Aberrations to the wavefront of a laser beam reduce the quality of the focal spot and are generally undesired. This project is aimed at determining the aberrations of laser beams by using a phase retrieval algorithm and to show that it is possible to correct the aberrations with a spatial light modulator to optimize the focal spot. LÄS MER

  5. 4. Influence of individual human factorson team performance in Agile softwaredevelopment

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för programvaruteknik

    Författare :Yuqi Ma; Vishruta Dochibhotla; [2022]
    Nyckelord :Individual Human factors; team performance; agile development; personality; high-performing teams;

    Sammanfattning : Background. With the growing trend in using Agile development method in thesoftware industry, the importance of "people" in the software development processhas risen up. As much as the technical aspects contribute to a better software processand products, it is ultimately people that make the software. LÄS MER

  7. 5. 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