Search for dissertations about: "polarized neutron scattering"

Showing result 1 - 5 of 7 swedish dissertations containing the words polarized neutron scattering.

2. 1. Carbides in martensitic mediumcarbon low alloyed tool steels studiedwith small angle scatteringtechniques, electron microscopy andatom probe tomography

   Author : Erik Claesson; Peter Hedström; Hans Magnusson; Erik Offerman; KTH; []
   Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Low alloyed tool steel; Martensite; Small angle scattering; Scanning transmission electron microscopy; Energy dispersive x-ray spectroscopy; atom probe tomography; Scanning precession electron diffraction; Precipitation; carbides; Tempering.; Materials Science and Engineering; Teknisk materialvetenskap;

   Abstract : Medium carbon low alloyed tool steels are used today in various areas toshape plastics, nonferrous metals, and steels, and they are crucial in themanufacturing industry. To be effective, tool steels must be strong andtough, and have high wear resistance and temperature stability. READ MORE

4. 2. Studies of PoGOLite performance and background rejection capabilities

   Author : Mózsi Kiss; Mark Pearce; Staffan Carius; KTH; []
   Keywords : NATURAL SCIENCES; NATURVETENSKAP; Physics; Fysik;

   Abstract : The Polarized Gamma-ray Observer (PoGOLite) is a balloon-borne instrument capable of measuring as low as 10% polarization from a 200 mCrab source in a sixhour °ight. A wide array of sources can be studied, including pulsars, neutron stars, accretion discs and jets from active galactic nuclei. READ MORE

5. 3. Pre-Flight Development of the PoGOLite Pathfinder

   Author : Mózsi Kiss; Mark Pearce; Gottfried Kanbach; KTH; []
   Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Astroparticle physics; Astropartikelfysik;

   Abstract : The Polarized Gamma-ray Observer (PoGOLite) is a balloon-borne instrument that will measure gamma-ray polarization in the energy range 25-80 keV from astronomical sources such as pulsars, accretion discs and jets from active galacticnuclei. The two additional parameters provided by such observations, polarizationangle and degree, will allow these objects to be studied in a new way, providing information about their emission mechanisms and geometries. READ MORE

6. 4. Critical Phenomena and Exchange Coupling in Magnetic Heterostructures

   Author : Martina Ahlberg; Gabriella Andersson; Björgvin Hjörvarsson; Steve Bramwell; Uppsala universitet; []
   Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; phase transitions; critical behavior; 2D XY model; MOKE; magnetic thin films and superlattices; amorphous multilayers; magnetic proximity effects; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Abstract : The continuous phase transition in thin magnetic films and superlattices has been studied using the magneto-optical Kerr effect (MOKE) and polarized neutron scattering (PNR).  It has been shown that the critical behavior of amorphous thin films belonging to the 2D XY universality class can be described within the same theory as crystalline sample. READ MORE

7. 5. Nanocellulose: Energy Applications and Self-Assembly

   Author : Valentina Guccini; German Salazar-Alvarez; Olli Ikkala; Stockholms universitet; []
   Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; nanocellulose; self-assembly; fuel cell; lithium ion battery; Materials Chemistry; materialkemi;

   Abstract : Technologies based on renewable materials are required to decrease the environmental cost and promote the development of a sustainable society. In this regard, nanocellulose extracted from wood finds many applications thanks to its intrinsic mechanical and chemical properties as well as the versatility in its manufacturing processes. READ MORE