Sökning: "radiation generation"

Visar resultat 26 - 30 av 179 avhandlingar innehållade orden radiation generation.

1. 26. Second-generation High-Order Harmonic Sources — From CPA to OPCPA

   Författare :Piotr Rudawski; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical parametric chirped pulse amplification; Fysicumarkivet A:2014:Rudawski; Chirped pulse amplification; High-order harmonic generation; Attosecond pulse;

   Sammanfattning : This thesis presents two sources of extreme ultraviolet (XUV) radiation based on high-order harmonic generation (HHG) in gases. The sources were developed for experiments requiring high-flux harmonic beams or HHG pulses at high-repetition rate. These were used experimentally to image nano-scale objects. LÄS MER

3. 27. Optimisation and Application of Intense High-Order Harmonic Pulses

   Författare :Lena Roos; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coherent radiation; Optimisation; Multiphoton ionisation; Phase matching; Physics; Fysik; Atomic and molecular physics; Atom- och molekylärfysik; Laserteknik; Laser technology; High-power lasers; Short pulses; High-order harmonic generation; Short wavelength; Fysicumarkivet A:2001:Roos;

   Sammanfattning : The high-order harmonics that are created in the interaction between an intense laser pulse (around 1014 W/cm2) and a gas medium are studied. The high-order harmonic radiation is a relatively new source of coherent radiation in the short wavelength range. LÄS MER

4. 28. Laser-Matter Interactions at Extreme Irradiance: X-ray Generation and Relativistic Channelling

   Författare :Anders Sjögren; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; relativistic self-focusing; particle acceleration; x-ray generation; radiography; Laserteknik; Laser technology; laser-produced plasma; light scattering; Fysicumarkivet A:2002:Sjögren;

   Sammanfattning : This thesis summarizes experimental work in which the powerful Ti:sapphire lasers at the High Power Laser Facility at the Lund Laser Centre have been employed to investigate laser-produced X-rays and relativistic channelling. These lasers produce short pulses, of the order of 50 fs, with energies ranging from 1 mJ to 1 J. LÄS MER

5. 29. Radiation-Induced Damage Processes in Nuclear Reactor Environments

   Författare :Elin Toijer; Pär Olsson; Julie Tucker; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics;

   Sammanfattning : It is essential that the materials used in nuclear reactor applications maintain their structural integrity. However, consequences of the strong radiation field in the reactor core include radiolysis of the water surrounding the materials, as well as direct defect generation in the material itself. LÄS MER

7. 30. Combined Electrical Power Generation using Solar and Wind

   Författare :Ingemar Mathiasson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wave length bands; atmospheric transmittance; energy storage; Wind turbine; wind speed; quantum dots; electrical load.; extinction coefficient; silicon solar cell; solar cell;

   Sammanfattning : The need for systems for renewable electrical power production is enormous worldwide.This applies to systems of varying size and capacity. From small systems for household purposes up to large systems for regional purposes. If possible, all systems should be linked in a common power grid. LÄS MER