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Visar resultat 1 - 5 av 7 avhandlingar som matchar ovanstående sökkriterier.
1. Collisional effects on electrostatic shock waves and heating in laser-generated plasmas
Sammanfattning : Electrostatic shock waves are associated with an electrostatic field structure propagating at supersonic speed through laboratory or astrophysical plasmas. Shock ion acceleration schemes, based on the strong electrostatic field in the shock structure, show promising potential due to the narrow energy spread of accelerated ions – which can be applied in plasma diagnostics, the generation of warm dense matter or medical purposes. LÄS MER
2. Development and Applications of a Laser-Wakefield X-ray Source
Sammanfattning : In laser-wakefield acceleration (LWFA), a femtosecond laser pulse is tightly focused in a gas to intensities exceeding 1018 W/cm2 . The laser radiation ionizes the medium and excites a plasma wave that travels behind the laser pulse. LÄS MER
3. Development and Applications of a Laser-Wakefield X-ray Source (updated)
Sammanfattning : In laser-wakefield acceleration (LWFA), a femtosecond laser pulse is tightly focused in a gas to intensities exceeding 1018 W/cm2 . The laser radiation ionizes the medium and excites a plasma wave that travels behind the laser pulse. LÄS MER
4. Molecules at stellar death: from the winds of massive evolved stars to supernova remnants
Sammanfattning : Massive stars play a key role in the chemical and dust budget of the galaxy, producing heavy elements, molecules, and dust. At the end of their lives they evolve through stages of significant mass-loss which affect the subsequent evolution of the star, including whether or not it will eventually explode as a supernova (SN). LÄS MER
5. Ultrafast Structural and Electron Dynamics in Soft Matter Exposed to Intense X-ray Pulses
Sammanfattning : Investigations of soft matter using ultrashort high intensity pulses have been made possible through the advent of X-ray free-electrons lasers. The last decade has seen the development of a new type of protein crystallography where femtosecond dynamics can be studied, and single particle imaging with atomic resolution is on the horizon. LÄS MER