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Numerical study of spectral densities of fluctuations in thermal plasma
KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

There are open issues within the uctuation theory owing to the approximations invoked

in regimes outside fully ionized collisionless plasmas. This includes laboratory and space

environments where e ects of Coulomb collisions or collisions with neutrals or dust particles

cannot be ignored. Molecular Dynamics simulations have the potential to address

such parameter regimes which are intractable by the analytical approach.

The numerical method employed in this work for the calculation of the space-time correlation

function of density uctuations is based on molecular dynamics in (r, v) space

using an importance sampling Monte Carlo. The outcome of these MD simulation is

then transformed into Fourier space to enable comparison with the analytical results of

the uctuation theory. The comparison is carried out in the regime of thermal collisionless

fully ionized plasmas, with no drifts and neutral component, in order to verify the

numerical approach, choose appropriate simulation and FFT settings and to estimate

error bars on the features of the electron spectral density of uctuations.

Place, publisher, year, edition, pages
2015. , 60 p.
EES Examensarbete / Master Thesis, XR-EE-SPP 2015:001
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:kth:diva-170436OAI: diva2:832441
Educational program
Master of Science - Electrophysics
Available from: 2015-06-30 Created: 2015-06-30 Last updated: 2015-06-30Bibliographically approved

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