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pro vyhledávání: '"Odd Erik Garcia"'
Fluctuations in a vast range of physical systems can be described as a superposition of uncorrelated pulses with a fixed shape, a process commonly referred to as a (generalized) shot noise or a filtered Poisson process. In this paper, we present a sy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7237b27a72d0ab864902141ac62c2007
https://hdl.handle.net/10037/29615
https://hdl.handle.net/10037/29615
Intermittent fluctuations in the boundary of magnetically confined plasmas are investigated by numerical turbulence simulations of a reduced fluid model describing the evolution of the plasma density and electric drift vorticity in the two-dimensiona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e76a3523b9e7dc1a373ba9175d8df93c
Statistical properties of the scrape-off layer plasma fluctuations are studied in ohmically heated plasmas in the Alcator C-Mod tokamak. For the first time, plasma fluctuations as well as parameters that describe the fluctuations are compared across
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ec36ac17f2565f7aca7e06b08b518b2
Turbulent motions due to flux-driven thermal convection is investigated by numerical simulations and stochastic modelling. Tilting of convection cells leads to the formation of sheared flows and quasi-periodic relaxation oscillations for the energy i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ed097b8a79c3e84f42cf247548b87fb
Publikováno v:
Nuclear Materials and Energy, Vol 19, Iss, Pp 295-299 (2019)
Experiments indicate that the formation of density shoulders in the far scrape-off layer (SOL) is associated with an increase in cross-field transport and the propagation of coherent structures of high density known as blobs. It has been suggested th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2115f2c49477d7f5f51e557532b629c0
https://hdl.handle.net/10037/17069
https://hdl.handle.net/10037/17069
Plasma fluctuations in the scrape-off layer of the Alcator C-Mod tokamak in ohmic and high confinement modes have been analyzed using gas puff imaging data. In all cases investigated, the time series of emission from a single spatially-resolved view
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ea9f9876fbffc4c5d333b6de9d63664
https://hdl.handle.net/10037/14831
https://hdl.handle.net/10037/14831
Large-amplitude, intermittent fluctuations are ubiquitous in the boundary region of magnetically confined plasmas and lead to detrimental plasma-wall interactions in the next-generation, high duty cycle fusion power experiments. Using gas puff imagin
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21aa91c05255493265efe5abf6f9a989
https://hdl.handle.net/10037/14607
https://hdl.handle.net/10037/14607
Autor:
Audun Theodorsen, Odd Erik Garcia
A well-known stochastic model for intermittent fluctuations in physical systems is investigated. The model is given by a super-position of uncorrelated exponential pulses, and the degree of pulse overlap is interpreted as an intermittency parameter.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df1c6d8109bf0c52d557466079627ea7
https://hdl.handle.net/10037/12821
https://hdl.handle.net/10037/12821
Autor:
Audun Theodorsen, Odd Erik Garcia
A stochastic model for intermittent fluctuations in the scrape-off layer of magnetically confined plasmas has been constructed based on a super-position of uncorrelated pulses arriving according to a Poisson process. In the most common applications o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a887971ec639e7a875c32d5410f6bd61
Autor:
Audun Theodorsen, Odd Erik Garcia
Frequency power spectra due to a super-position of uncorrelated Lorentzian pulses with a random distribution of amplitudes are considered. For pulses with constant duration, there is an exponential frequency spectrum which is independent of the degre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97e135952d37952eb42e2b1142789de3
https://hdl.handle.net/10037/14837
https://hdl.handle.net/10037/14837