Academic literature on the topic 'Plasma fysisk'

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Journal articles on the topic "Plasma fysisk"

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Nygård, Ottar, Helga Refsum, Per Magne Ueland, Aage Tverdal, and Stein Emil Vollset. "Homocystein og livsstil. Resultater fra Homocysteinundersøkelsen i Hordaland 1992-1993." Norsk Epidemiologi 7, no. 2 (2009). http://dx.doi.org/10.5324/nje.v7i2.410.

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<strong><span style="font-family: TimesNewRomanPS-BoldMT;"><span style="font-family: TimesNewRomanPS-BoldMT;"><p align="left"> </p></span></span><span style="font-size: x-small; font-family: TimesNewRomanPS-BoldMT;"><span style="font-size: x-small; font-family: TimesNewRomanPS-BoldMT;">SAMMENDRAG</span></span></strong><span style="font-size: x-small; font-family: TimesNewRomanPSMT;"><span style="font-size: x-small; font-family: TimesNewRomanPSMT;"><p align="left">Total homocystein (tHcy) er etablert som r
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Dissertations / Theses on the topic "Plasma fysisk"

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Ouahioune, Nedjma. "Čerenkov emission of whistler waves by electron holes." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446395.

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Electron holes are positively charged nonlinear structures in which trapped electrons are supported by a positive electrostatic potential. These structure are regularly observed in space and laboratory plasmas by means of diverging bipolar electric field signatures. Recent observations and simulations have shown that fast moving electron holes can generate electromagnetic whistler waves via Čerenkov emission. The fast moving positive charge correspond to localised currents which can potentially excite waves. The aim of the project is to study both theoretically and numerically the properties l
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Jakubowska, Katarzyna. "Development of visible spectroscopic techniques for applications in plasma diagnostics." Licentiate thesis, Stockholm : KTH Physics, Royal Institute of Technology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4252.

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Shafiq, Muhammad. "Dusty plasma response to a moivng test charge." Licentiate thesis, KTH, Alfvén Laboratory Centre for Space and Fusion Plasma Physics, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298.

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<p>This licentiate thesis reports analytical results for the electrostatic response to a test charge moving through dusty plasma. Two particular cases for a slowly moving test charge, namely, grain size distribution and grain charging dynamics are considered. Analytical results for the delayed shielding of a test charge due to dynamical grain charging in dusty plasma are also reported. In the first case, a dusty plasma in thermal equilibrium and with a distribution of grain sizes is considered. A size distribution is assumed which decreases exponentially with the grain mass for large sizes and
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Carlsson, Ella. "Mars : plasma environment and surface." Doctoral thesis, Luleå, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16797.

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This doctoral thesis treats parts of the solar wind interaction with the Martian atmosphere and the water-related features known as gullies. The composition of the escaping plasma at Mars has been investigated in an analysis of data from the IMA sensor, which is a part of the ASPERA-3 instrument suit onboard the European satellite Mars Express. The goal of the investigation is to determine if there are any high abundances of escaping ion species incorporating carbon, such as in CO_2^+ . The most abundant ion species was found to be O^+ and O_2^+, followed by CO_2^+. The following ratios were i
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Almqvist, Nils. "Studies of plasma-facing materials and macromolecules using scanning probe microscopy." Doctoral thesis, Luleå tekniska universitet, Materialvetenskap, 1995. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16824.

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The main topic of this thesis is experimental analysis of material surfaces using scanning probe microscopies. These microscopes are used for characterization through high-resolution topographical imaging, but also for controlled modification of surfaces and molecules. The surface characterization includes evaluation and development of fractal methods for surface roughness determination. The term modification is used for manipulating the structures on a microscale by scraping them with a tiny tip. The major application of this technique in the present work is the analysis of effects induced by
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Böhlmark, Johan. "Fundamentals of High Power Impulse Magnetron Sputtering." Doctoral thesis, Linköpings universitet, Plasma och beläggningsfysik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7359.

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In plasma assisted thin film growth, control over the energy and direction of the incoming species is desired. If the growth species are ionized this can be achieved by the use of a substrate bias or a magnetic field. Ions may be accelerated by an applied potential, whereas neutral particles may not. Thin films grown by ionized physical vapor deposition (I-PVD) have lately shown promising results regarding film structure and adhesion. High power impulse magnetron sputtering (HIPIMS) is a relatively newly developed technique, which relies on the creation of a dense plasma in front of the sputte
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Söderström, Daniel. "Modelling and Applications of the Hollow Cathode Plasma." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8747.

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This thesis presents experimental and modelling research on atmospheric pressure hollow cathodes and hollow electrodes. Experiments with the hybrid hollow electrode activated discharge (H-HEAD), which is a combination of a hollow cathode and a microwave plasma source, is presented. The experiments show that this source is able to produce long plasma columns in air and nitrogen at atmospheric pressure and at very low gas flow rates. Measurements of the vibrational temperature of the nitrogen molecules are also presented in this thesis. The vibrational temperature is an indication of the electro
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Rygaard, Lovisa, and Andreas Ström. "Simulations of fission fragments in VERDI : A study of the Plasma Delay Time phenomenon." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-412949.

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The purpose of this project is to study the plasma delay time phenomenon in preparation for the construction of the VERDI spectrometer. To accomplish this, simulations of the spontaneous fissioning process of Cf-252 were created using the fission code GEF, as well as MATLAB. GEF has produced one million fission events, from which the time of flight and kinetic energy of each fission fragment have been calculated with classical mechanics, to replicate the experiment. To imitate the plasma delay time phenomenon, three different models, found in the literature, have been compared. Accounting for
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Järleblad, Henrik. "Helical Magnetic Fields in the FEMIC Code for RF Heating of Fusion Plasmas." Thesis, KTH, Tillämpad fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254432.

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Eriksson, Jacob. "Fuel ion densities and distributions in fusion plasmas : Modeling and analysis for neutron emission spectrometry." Licentiate thesis, Uppsala universitet, Tillämpad kärnfysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-192530.

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Neutrons produced in fusion reactions in a magnetically confined plasma carry information about the distributions and densities of the fuel ions in the plasma. This thesis presents work where various theoretical models of different fuel ion distributions in the plasma are used to calculate modeled components of the neutron energy spectrum. The calculated components can then be compared with measured data, either to benchmark and validate the model or to derive various plasma parameters from the experimental data. Neutron spectra measured with the spectrometers TOFOR and the MPR, which are both
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Books on the topic "Plasma fysisk"

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The physics of the quark-gluon plasma. Springer-Verlag, 1985.

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