Search for dissertations about: "Jonas Björklund"

Showing result 1 - 5 of 6 swedish dissertations containing the words Jonas Björklund.

  2. 1. Extreme Electron Beams and Brilliant X-rays : Generation, Manipulation and Characterization of Relativistic Electron Beams for and from Plasma-Based Accelerators

    Author : Jonas Björklund Svensson; Atomfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; laser; plasma; wakefield; acceleration; accelerator; relativistic; electrons; x-rays; ultra-fast; betatron; laser-wakefield acceleration; plasma-wakefield acceleration; Fysicumarkivet A:2020:Björklund;

    Abstract : This thesis is based on work done by the author on the development of plasma-based electron accelerators driven by ultra-intense laser pulses and dense electron bunches. Plasma based accelerators have several benefits, such as accelerating fields around 1000 times stronger than in “conventional” radio-frequency accelerators, which can allow for shrinking the overall footprint of the accelerator. READ MORE

  4. 2. Gas chromatography and mass spectrometry of polybrominated diphenyl ethers

    Author : Jonas Björklund; Jacob De Boer; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; Analytisk kemi; Analytical Chemistry; analytisk kemi;

    Abstract : The aim of this thesis has been to develop accurate and sensitive analytical methods for the determination of polybrominated diphenyl ethers (PBDEs). It focuses on the development and optimization of gas chromatographic and mass spectrometric analysis of PBDE. READ MORE

  5. 3. Community Assembly and Spatial Ecology of Saproxylic Coleoptera

    Author : Jonas Victorsson; Mats Björklund; Stefan Ås; Anne Magurran; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Terrestrial ecology; Terrestisk ekologi; Animal Ecology; zooekologi;

    Abstract : Community assembly is the process deciding inclusion/exclusion of species in a developing community. Spatial ecology integrates spatial habitat factors with local biotic interactions within a given patch. I used standardized tree bolts (0.35-1 m long) to sample saproxylic (wood living) beetles in natural and managed forest types. READ MORE

  6. 4. Life cycle assessment in early planning of transport systems : Decision support at project and network levels

    Author : Carolina Liljenström; Anna Björklund; Jonas Åkerman; Susanna Toller; Robert Karlsson; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The Swedish Climate Policy Framework implies that the Swedish transport sector must reduce its greenhouse gas emissions to nearly zero by 2045. Previous studies have – using life cycle assessment – shown that indirect greenhouse gas emissions from the vehicle and infrastructure life cycle are significant and should be considered in transport policy and planning of transport systems, in addition to direct emissions of vehicle operation. READ MORE

  7. 5. Consideration of life cycle energy use and greenhouse gas emissions for improved road infrastructure planning

    Author : Sofiia Miliutenko; Anna Björklund; Jonas Åkerman; Annica Carlsson; Susanna Toller; Rolf André Bohne; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Greenhouse gas GHG emissions; energy use; life cycle assessment LCA ; road infrastructure planning; Planering och beslutsanalys; Planning and Decision Analysis;

    Abstract : Global warming is one of the biggest challenges of our society. The road transport sector is responsible for a big share of Greenhouse Gas (GHG) emissions, which are considered to be the dominant cause of global warming. READ MORE