1. Unit startpage
  2. Employees
  3. Audun Theodorsen
IMG_1559.JPG
IMG_1559.JPG
Department of Physics and Technology audun.theodorsen@uit.no 77625263 TROM FPARK A 409

Theodorsen, Audun

Associate Professor / Complex Systems Modeling

  • Decristoforo, Gregor; Theodorsen, Audun; Omotani, John; Nicholas, Tom; Garcia, Odd Erik. Numerical turbulence simulations of intermittent fluctuations in the scrape-off layer of magnetized plasmas. Physics of Plasmas 2021. ISSN 1070-664X.s doi: doi: 10.1063/5.0047566.
  • Kube, Ralph; Theodorsen, Audun; Garcia, Odd Erik; Brunner, D; Labombard, B; Terry, James L.. Comparison between mirror Langmuir probe and gas-puff imaging measurements of intermittent fluctuations in the Alcator C-Mod scrape-off layer. Journal of Plasma Physics 2020; Volum 86 (5). ISSN 0022-3778.s doi: 10.1017/S0022377820001282.
  • Decristoforo, Gregor; Theodorsen, Audun; Garcia, Odd Erik. Intermittent fluctuations due to Lorentzian pulses in turbulent thermal convection. Physics of Fluids 2020; Volum 32 (8). ISSN 1070-6631.s doi: 10.1063/5.0012017.
  • Kube, Ralph; Garcia, Odd Erik; Theodorsen, Audun; Kuang, Adam; LaBombard, Brian; Terry, Jim L.; Brunner, Dan. Statistical properties of the plasma fluctuations and turbulent cross-field fluxes in the outboard mid-plane scrape-off layer of Alcator C-Mod. Nuclear Materials and Energy 2019; Volum 18. ISSN 2352-1791.s 193 - 200.s doi: 10.1016/j.nme.2018.11.021.
  • Kuang, AQ; LaBombard, Brian; Brunner, D; Garcia, Odd Erik; Kube, Ralph; Theodorsen, Audun. Plasma fluctuations in the scrape-off layer and at the divertor target in Alcator C-Mod and their relationship to divertor collisionality and density shoulder formation. Nuclear Materials and Energy 2019; Volum 19. ISSN 2352-1791.s 295 - 299.s doi: 10.1016/j.nme.2019.02.038.
  • Garcia, Odd Erik; Theodorsen, Audun. Skewed Lorentzian pulses and exponential frequency power spectra. Physics of Plasmas 2018; Volum 25 (1). ISSN 1070-664X.s doi: 10.1063/1.5004811.
  • Garcia, Odd Erik; Theodorsen, Audun. Intermittent fluctuations due to uncorrelated Lorentzian pulses. Physics of Plasmas 2018; Volum 25 (1). ISSN 1070-664X.s doi: 10.1063/1.5020555.
  • Garcia, Odd Erik; Kube, Ralph; Theodorsen, Audun; Labombard, B; Terry, J.L. Intermittent fluctuations in the Alcator C-Mod scrape-off layer for ohmic and high confinement mode plasmas. Physics of Plasmas 2018; Volum 25 (5). ISSN 1070-664X.s doi: 10.1063/1.5018709.
  • Kube, Ralph; Garcia, Odd Erik; Theodorsen, Audun; Brunner, Daniel; Kuang, Adam; LaBombard, Brian; Terry, James L.. Intermittent electron density and temperature fluctuations and associated fluxes in the Alcator C-Mod scrape-off layer. Plasma Physics and Controlled Fusion 2018; Volum 60 (6). ISSN 0741-3335.s 1 - 16.s doi: 10.1088/1361-6587/aab726.
  • Theodorsen, Audun; Garcia, Odd Erik. Level crossings and excess times due to a superposition of uncorrelated exponential pulses. Physical review. E 2018; Volum 97 (1). ISSN 2470-0045.s 1 - 18.s doi: 10.1103/PhysRevE.97.012110.
  • Theodorsen, Audun; Garcia, Odd Erik. Probability distribution functions for intermittent scrape-off layer plasma fluctuations. Plasma Physics and Controlled Fusion 2018; Volum 60 (3). ISSN 0741-3335.s 1 - 14.s doi: 10.1088/1361-6587/aa9f9c.
  • Theodorsen, Audun; Garcia, Odd Erik; Kube, Ralph; LaBombard, Brian; Terry, James L.. Universality of Poisson-driven plasma fluctuations in the Alcator C-Mod scrape-off layer. Physics of Plasmas 2018; Volum 25. ISSN 1070-664X.s doi: 10.1063/1.5064744.
  • Garcia, Odd Erik; Theodorsen, Audun. Auto-correlation function and frequency spectrum due to a super-position of uncorrelated exponential pulses. Physics of Plasmas 2017; Volum 24 (3). ISSN 1070-664X.s 1 - 13.s doi: 10.1063/1.4978955.
  • Garcia, Odd Erik; Theodorsen, Audun. Power law spectra and intermittent fluctuations due to uncorrelated Lorentzian pulses. Physics of Plasmas 2017; Volum 24 (2). ISSN 1070-664X.s 1 - 5.s doi: 10.1063/1.4975645.
  • Theodorsen, Audun; Garcia, Odd Erik; Rypdal, Martin Wibe. Statistical properties of a filtered Poisson process with additive random noise: distributions, correlations and moment estimation. Physica Scripta 2017; Volum 92 (5). ISSN 0031-8949.s doi: 10.1088/1402-4896/aa694c.
  • Theodorsen, Audun; Garcia, Odd Erik; Kube, Ralph; LaBombard, Brian; Terry, Jim L.. Relationship between frequency power spectra and intermittent, large-amplitude bursts in the Alcator C-Mod scrape-off layer. Nuclear Fusion 2017; Volum 57 (11). ISSN 0029-5515.s 1 - 7.s doi: 10.1088/1741-4326/aa7e4c.
  • Garcia, Odd Erik; Kube, Ralph Arthur; Theodorsen, Audun; Bak, J. G.; Hong, SH; Kim, H.S.; the,, KSTAR project team; Pitts, RA. SOL width and intermittent fluctuations in KSTAR. Nuclear Materials and Energy 2016; Volum 12. ISSN 2352-1791.s 36 - 43.s doi: 10.1016/j.nme.2016.11.008.
  • Kube, Ralph; Theodorsen, Audun; Garcia, Odd Erik; LaBombard, Brian; Terry, James L.. Fluctuation statistics in the scrape-off layer of Alcator C-Mod. Plasma Physics and Controlled Fusion 2016; Volum 58:054001 (5). ISSN 0741-3335.s 1 - 13.s doi: 10.1088/0741-3335/58/5/054001.
  • Garcia, Odd Erik; Kube, Ralph; Theodorsen, Audun; Pecseli, Hans. Stochastic modelling of intermittent fluctuations in the scrape-off layer: Correlations, distributions, level crossings, and moment estimation. Physics of Plasmas 2016; Volum 23 (5). ISSN 1070-664X.s 1 - 14.s doi: 10.1063/1.4951016.
  • Theodorsen, Audun; Garcia, Odd Erik; Horacek, Jan; Kube, Ralph; Pitts, RA. Scrape-off layer turbulence in TCV: Evidence in support of stochastic modelling. Plasma Physics and Controlled Fusion 2016; Volum 58 (4). ISSN 0741-3335.s 1 - 12.s doi: 10.1088/0741-3335/58/4/044006.
  • Theodorsen, Audun; Garcia, Odd Erik. Level crossings, excess times, and transient plasma-wall interactions in fusion plasmas. Physics of Plasmas 2016; Volum 23 (4). ISSN 1070-664X.s 1 - 5.s doi: 10.1063/1.4947235.
  • Theodorsen, Audun; Rypdal, Martin wibe. Climate Response to Volcanic Forcing. Time series analysis 2019-01-28 - 2019-01-30 2019.
  • Garcia, Odd Erik; Theodorsen, Audun. Atomkraftverk kan være fremtiden mener Tromsø-forskere: – Risikofritt. (fulltekst) 2019.
  • Theodorsen, Audun; Garcia, Odd Erik; Rypdal, Martin wibe. Power-law scaling of uncorrelated plasma bursts. European Physical Society 46th conference on plasma physics 2019-07-08 - 2019-07-12 2019.
  • Theodorsen, Audun. ITER: The quest for fusion. Fysikermøtet 2019 2019-08-07 - 2019-08-09 2019.
  • Kube, Ralph; Garcia, Odd Erik; Theodorsen, Audun; Kuang, Adam; Brunner, Dan; LaBombard, Brian; Terry, Jim L.. Statistical properties of fluctuation driven flows in the outboard mid-plane SOL of Alcator C-Mod. International Conference on Plasma Surface Interactions in Controlled Fusion Devices 2018-06-17 - 2018-06-22 2018.
  • Theodorsen, Audun. Fusjonsenergi I & II. Skolelabratoriet 2018-04-04 - 2018-04-04 2018.
  • Theodorsen, Audun. Fusjon: framtidas energikilde. Forskerturne i forbindelse med UiTs 50 års jubileum 2018-04-24 - 2018-04-25 2018.
  • Os, Vibeke; Theodorsen, Audun. –Det blir som å putte sola i en boks. (fulltekst) 2018.
  • Theodorsen, Audun; Garcia, Odd Erik; Kube, Ralph; Brunner, Dan; LaBombard, Brian; Terry, James L.. Intermittent fluctuations in Alcator C-Mod: Comparison of diagnostics. European Physical Society 45th Conference on Plasma Physics 2018-07-02 - 2018-07-06 2018.
  • Theodorsen, Audun; Os, Vibeke. Fusjonsenergi: – Det blir som å putte sola i en boks. 2018.
  • Garcia, Odd Erik; Kube, Ralph; Theodorsen, Audun. Intermittent plasma fluctuations in the Alcator C-Mod scrape-off layer in L- and H-modes. 2017 US/EU Transport Task Force Meeting 2017-04-25 - 2017-04-28 2017.
  • Garcia, Odd Erik; Kube, Ralph; Theodorsen, Audun. Intermittent fluctuations in the scrape-off layer of tokamak plasmas. 2017 Sherwood Fusion Theory Conference 2017-05-01 - 2017-05-03 2017.
  • Theodorsen, Audun; Garcia, Odd Erik; Kube, Ralph; Brunner, Dan; LaBombard, Brian; Terry, James L.. Stochastic modeling of SOL fluctuation probability distributions. 2017 US/EU Transport Task Force Meeting 2017-04-25 - 2017-04-28 2017.
  • Theodorsen, Audun; Garcia, Odd Erik. Stochastic modeling of SOL fluctuation threshold crossings and excess time distributions. 2017 Sherwood Fusion Theory Conference 2017-05-01 - 2017-05-03 2017.
  • Kube, Ralph; Theodorsen, Audun; Garcia, Odd Erik; Brunner, Daniel; Kuang, Adam; LaBombard, Brian; Terry, James L.. Stochastic modeling of scrape-off layer fluctuations. Princeton Plasma Physics Laboratory Theory Seminar 2017-08-24 - 2017-08-24 2017.
  • Theodorsen, Audun; Garcia, Odd Erik. Using statistics to describe turbulence in fusion plasmas. Fysikermøtet 2017-08-07 - 2017-08-09 2017.
  • Kube, Ralph; Garcia, Odd Erik; Theodorsen, Audun; Brunner, Dan; LaBombard, Brian; Terry, Jim L.; Wiesenberger, Matthias; held, markus. Blob shapes in the scrape-off layer: Comparison of measurements to simulations. 59th Annual Meeting of the APS Division of Plasma Physics 2017-10-23 - 2017-10-27 2017.
  • Kube, Ralph; Garcia, Odd Erik; Theodorsen, Audun; Brunner, Dan; Kuang, Adam; LaBombard, Brian; Terry, Jim L.. Universality of intermittent fluctuations in the Alcator C-Mod scrape-off layer. 59th Annual Meeting of the APS Division of Plasma Physics 2017-10-23 - 2017-10-27 2017.
  • Theodorsen, Audun; Garcia, Odd Erik; Kube, Ralph; LaBombard, Brian; Terry, Jim L.. Application of RL-deconvolution for identifying amplitudes and arrival times in Alcator C-Mod far SOL plasma fluctuations. 59th Annual Meeting of the APS Division of Plasma Physics 2017-10-23 - 2017-10-27 2017.
  • Garcia, Odd Erik; Kube, Ralph; Theodorsen, Audun. Experimental measurements and stochastic modelling of intermittent fluctuations in the SOL of magnetically confined plasma. PPFE seminar 2017-12-19 - 2017-12-29 2017.
  • Garcia, Odd Erik; Kube, Ralph; Theodorsen, Audun. SOL width and inter­mit­tent fluc­tu­a­tions in KSTAR. 22nd Inter­na­tional Con­fer­ence on Plasma Sur­face Inter­ac­tions in Con­trolled Fusion Devices (data) 2016-05-30 - 2016-06-03 2016.
  • Garcia, Odd Erik; Kube, Ralph; Theodorsen, Audun. Radial motion of blob-like structures and broad scrape-off layer profiles. European Physical Society 43rd Conference on Plasma Physics (data) 2016-07-04 - 2016-07-08 2016.
  • Garcia, Odd Erik; Theodorsen, Audun. Power law spectra and intermittent fluctuations due to a sum of uncorrelated pulses. Foredrag 2016-11-15 - 2016-11-15 2016.
  • Theodorsen, Audun; Garcia, Odd Erik; Kube, Ralph; Brunner, Dan; LaBombard, Brian; Terry, James L.. Level crossings and excess times of intermittent fluctuations in scrape-off layer plasmas. 58th Annual Meeting of the APS Division of Plasma Physics 2016-10-31 - 2016-11-04 2016.
  • Kube, Ralph; Theodorsen, Audun; Garcia, Odd Erik; Terry, James L.; LaBombard, Brian. Statistics of fluctuation induced transport in the scrape-off layer of Alcator C-Mod. 58th Annual Meeting of the APS Division of Plasma Physics 2016-10-31 - 2016-11-04 2016.
  • Kube, Ralph; LaBombard, Brian; Garcia, Odd Erik; Terry, Jim L.; Theodorsen, Audun. Fluctuation statistics in the scrape-off layer of Alcator C-Mod. 43rd European Physical Society Conference on Plasma Physics 2016-07-04 - 2016-07-08 2016.
  • Theodorsen, Audun; Garcia, Odd Erik; Kube, Ralph. Convergence of excess time statistics of intermittent fluctuations in SOL plasmas. European Physical Society 43rd Conference on Plasma Physics (data) 2016-07-04 - 2016-07-08 2016.
  • Theodorsen, Audun; Garcia, Odd Erik. Excess time statistics of intermittent fluctuations in SOL plasmas. Carolus Magnus Sommerskole 2015 (data) 2015-08-24 - 2016-09-04 2015.
    • Look at all works in CRIStin →

    Research interests

    • Plasma physics, primarily in the context of nuclear fusion.
    • Turbulence, turbulent transport and coherent fluctuations in complex, chaotic and self-organized systems.
    • Stochastic modelling and time series analysis.

    Teaching

    I teach a special curriculum on stochastic modelling of complex systems if there are enough students. Please contact me if you are interested.

    Past

    • FYS-2009 Introduction to plasma physics (2018, 2020)
    • FYS-1002 Electromagnetism (2019)
    • FYS-2009 Introduction to plasma physics (exercises) (2019)
    Researcher profile in Cristin
    Registrations in Munin
    ResearchGate
    ORCID: https://orcid.org/0000-0002-5142-3113

    Member of research group

    Complex Systems Modelling   Norsk innhold
    FPARK A 409

    Click for bigger map