Bilde av Fredriksen, Åshild
Bilde av Fredriksen, Åshild
Department of Physics and Technology afr000@post.uit.no +4777645133 Aurolab: 776 45141 Tromsø TEK 3.062

Åshild Fredriksen


Professor / Plasma and Space Physics


  • Lisa Marie Buschmann, Åshild Fredriksen :
    Axial and radial development of the hot electron distribution in a helicon plasma source, measured by a retarding field energy analyzer (RFEA)
    Plasma Sources Science & Technology 2022 DOI
  • Tarjei Antonsen, Ingrid Mann, Jakub Vaverka, Libor Nouzak, Åshild Fredriksen :
    A comparison of contact charging and impact ionization in low-velocity impacts: implications for dust detection in space
    Annales Geophysicae 2021 ARKIV / DOI
  • Åshild Fredriksen, Hans L Pécseli, Jan Karsten Trulsen :
    Anomalous transport due to large coherent structures in a magnetized toroidal plasma
    Plasma Physics and Controlled Fusion 2020 ARKIV / DOI
  • Pascal Sado, Åshild Fredriksen :
    Detailed density and ion energy profiles downstream of a small ECR plasma source
    IEEE Transactions on Plasma Science 2020 DOI
  • Ove Havnes, Tarjei Antonsen, Gerd Baumgarten, Thomas W. Hartquist, Alexander Biebricher, Åshild Fredriksen et al.:
    A new method of inferring the size, number density, and charge of mesospheric dust from its in situ collection by the DUSTY probe
    Atmospheric Measurement Techniques 2019 ARKIV / DATA / DOI
  • Tinna Gunnarsdottir, Henriette Trollvik, Ingrid Mann, Sveinung viggo Olsen, Yngve Eilertsen, Tarjei Antonsen et al.:
    CHARGING AND DETECTION OF MESOSPHERIC DUST WITH INSTRUMENT SPID ON G-CHASER ROCKET
    ESA SP 2019 ARKIV
  • Ingrid Mann, Libor Nouzák, Jakub Vaverka, Tarjei Antonsen, Åshild Fredriksen, Karine Issautier et al.:
    Dust observations with antenna measurements and its prospects for observations with Parker Solar Probe and Solar Orbiter
    Annales Geophysicae 2019 ARKIV / DOI
  • Henriette Marie Tveitnes Trollvik, Tinna Gunnarsdottir, Ingrid Mann, Sveinung viggo Olsen, Erlend Sømhovd Restad, Tarjei Antonsen et al.:
    Observation of mesospheric dust and ionospheric conditions during the G-chaser rocket campaign
    ESA SP 2019 ARKIV
  • Erik Varberg, Åshild Fredriksen :
    Effect of permanent magnets on plasma confinement and ion beam properties in a double layer helicon plasma source
    Journal of Plasma Physics 26. June 2019 ARKIV / DOI
  • Åshild Fredriksen, Hans Pecseli, Jan Karsten Trulsen :
    A solvable model for the basic properties of a simple magnetized plasma torus
    Plasma Physics and Controlled Fusion 2018 ARKIV / DOI
  • Njål Gulbrandsen, Åshild Fredriksen :
    RFEA Measurements of High-Energy Electrons in a Helicon Plasma Device with Expanding Magnetic Field
    Frontiers in Physics 2017 ARKIV / DOI
  • Sudeep Bhattacharjee, Åshild Fredriksen, Sayan Chandra :
    Fluctuations in electron cyclotron resonance plasma in a divergent magnetic field
    Physics of Plasmas 2016 ARKIV / DOI
  • Anne Schad Bergsaker, Åshild Fredriksen, Hans Pecseli, Jan Karsten Trulsen :
    Models for the probability densities of the turbulent plasma flux in magnetized plasmas
    Physica Scripta 2015 DOI
  • Ove Havnes, Tarjei Antonsen, Thomas W. Hartquist, Åshild Fredriksen, John M.C. Plane :
    The Tromsø programme of in situ and sample return studies of mesospheric nanoparticles
    Journal of Atmospheric and Solar-Terrestrial Physics 2015 DOI
  • Njål Gulbrandsen, Åshild Fredriksen, Jerry Carr, Jr, Earl Scime :
    A comparison of ion beam measurements by retarding field energy analyzer and laser induced fluorescence in helicon plasma devices
    Physics of Plasmas 2015 DOI
  • Njål Gulbrandsen, Åshild Fredriksen :
    The role of collisions for beam formation in a plasma potential gradient
    2014 FULLTEKST
  • Anne Schad Bergsaker, Åshild Fredriksen, Hans Pecseli, Jan Karsten Trulsen :
    Analytical models for skewness-kurtosis relations in turbulent transport
    2014 FULLTEKST
  • Åshild Fredriksen, Njål Gulbrandsen :
    Beam formation in a weakly collisional expanding, inductively coupled plasma.
    IEEE Sarnoff Symposium 2014 SAMMENDRAG / DOI
  • Ove Havnes, Tarjei Antonsen, Åshild Fredriksen, Sveinung Viggo Olsen, Yngve Eilertsen, Inge o Strømmesen :
    ICON, A MASS ANALYZER FOR THE ICE CONTENT OF NLC/PMSE PARTICLES
    ESA SP 2013
  • Åshild Fredriksen, Wojciech Jacek Miloch, Njål Gulbrandsen, Lekha Nath Mishra :
    On the Use of a Retarding Field Energy Analyzer for Plasma Flow Analysis
    Contributions to Plasma Physics 2013 DOI
  • Njål Gulbrandsen, Wojciech Jacek Miloch, Åshild Fredriksen :
    Interpretation of Ion Velocity Distributions Measured with a Grounded Retarding Field Energy Analyzer (RFEA) in an Inductively Coupled Helicon Plasma
    Contributions to Plasma Physics 09. January 2013 DOI
  • L. Fattorini, Åshild Fredriksen, Hans Pecseli, C. Riccardi, Jan Karsten Trulsen :
    Turbulent transport in a toroidal magnetized plasma
    Plasma Physics and Controlled Fusion 2012 DOI
  • Ingrid Mann, Sveinung viggo Olsen, Yngve Eilertsen, Henriette Trollvik, Adrien Pinneau, Sabina Strmic Palinkas et al.:
    Plans for Mesospheric Dust Studies with MXD2
    2022
  • Pascal Sado, Åshild Fredriksen :
    On confinement and plasma acceleration from a small ECR plasma source
    2019
  • Lisa Marie Buschmann, Njål Gulbrandsen, Åshild Fredriksen :
    Energetic electrons upstream and downstream of a current-free double layer (CFDL) in an inductively coupled helicon plasma.
    2019
  • Åshild Fredriksen :
    Activity and future plans for studies of dust in the mesosphere at Dep. Physics and Technology, UIT
    2019
  • Åshild Fredriksen, Njål Gulbrandsen, Lisa Marie Buschmann, Erik Varberg :
    On the ion beams and energetic electrons through a current-free double layer(CFDL)
    2019
  • Åshild Fredriksen, Ingrid Mann, Tarjei Antonsen, Michael DeLuca, John Fontanese, Zoltan Sternovsky :
    Laboratory simulations of hypervelocity dust impacts on spacecraft
    2019
  • Tinna Gunnarsdottir, Henriette Trollvik, Ingrid Mann, Sveinung viggo Olsen, Yngve Eilertsen, Tarjei Antonsen et al.:
    CHARGING AND DETECTION OF MESOSPHERIC DUST WITH INSTRUMENT SPID ON G-CHASER ROCKET
    2019
  • Ingrid Mann, Jøran Idar Moen, Kolbjørn Blix, Åshild Fredriksen, Rune Graversen, Ove Havnes et al.:
    MESOSPHERIC AND MIDDLE ATMOSPHERIC STUDIES IN NORWAY AND INTERNATIONAL COLLABORATION
    2019
  • Ingrid Mann, Tinna Gunnarsdottir, Henriette Trollvik, Åshild Fredriksen, Tarjei Antonsen, Ove Havnes :
    Nanoparticles in Earth's ionosphere – detection from rockets
    2019
  • Henriette Marie Tveitnes Trollvik, Tinna Gunnarsdottir, Ingrid Mann, Sveinung viggo Olsen, Erlend Restad, Tarjei Antonsen et al.:
    Observation of mesospheric dust and ionospheric conditions during the G-chaser rocket campaign
    2019
  • Åshild Fredriksen, Njål Gulbrandsen, Lisa Buschmann :
    Energetic electrons near a current-free double layer in inductively coupled helicon plasma.
    2018
  • Åshild Fredriksen :
    Laboratory plasma simulation of impacts
    2018
  • Tarjei Antonsen, Ove Havnes, Åshild Fredriksen, Martin Friedrich, Zoltan Sternovsky, John M.C. Plane et al.:
    Mesospheric dust observations during the MAXIDUSTY campaign
    2017
  • Erik Varberg, Åshild Fredriksen :
    Effect of permanent magnets on plasma confinement and ion beams from a helicon plasma source
    2017 FULLTEKST
  • Åshild Fredriksen :
    Women in Physics-Norway
    2017
  • Kenneth Nilsen, Åshild Fredriksen, Ingrid Mann :
    Plasma Clouds from Vacuum Arcs in a Laboratory Experiment - A Possible Simulation Tool for Impact Clouds from Hypervelocity Dust Impact?
    2017
  • Anne Schad Bergsaker, Åshild Fredriksen, Hans Pecseli, Jan Karsten Trulsen :
    Analytical models for skewness-kurtosis relations in turbulent transport
    2014
  • Åshild Fredriksen, Njål Gulbrandsen :
    Beam formation in a weakly collisional expanding, inductively coupled plasma.
    2014
  • Njål Gulbrandsen, Åshild Fredriksen :
    Comparison of ion beam diagnostics with laser induced fluorescence (LIF) and retarding field energy analyzer (RFEA) in a low-temperature RF-plasma
    2014
  • Njål Gulbrandsen, Åshild Fredriksen :
    The role of collisions for beam formation in a plasma potential gradient
    2014
  • Åshild Fredriksen :
    On ion flow measurements in low-temperature plasmas
    2013
  • Åshild Fredriksen :
    Introduction to the Physics Department and Space research at UiT
    2013
  • Åshild Fredriksen :
    Beam and flow studies in an expanding plasma
    2013
  • Åshild Fredriksen :
    Ny rocket science: Plasmaraketter setter fart på romfartøyer
    2013
  • Åshild Fredriksen, Njål Gulbrandsen :
    Ion beam formation in a plasma with expanding magnetic field
    2013
  • Åshild Fredriksen, Njål Gulbrandsen, Wojciech Jacek Miloch :
    Potential and ion flow profiles in a Helicon-source plasma
    2013
  • Bodil Holst, Åshild Fredriksen, Anne Borg :
    On the Recruitment and Participation of Women in Physics: A Report from Norway
    AIP Conference Proceedings 2013
  • Njål Gulbrandsen, Åshild Fredriksen, Jerry Carr Jr, Earl Scime, Dustin W. McCarren, Robert VanDervort et al.:
    A comparison of ion velocity measurements from retarding field energy analyzer (RFEA) and laser induced fluorescence (LIF) in expanding helicon plasma
    2012

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    Research interests

    Experimental plasma physics, acceleration and heating processes, electric double layers, turbulence and turbulent structures, plasma diagnostics.
    See also the Aurolab pages.

    Teaching

    Fys-3017/8017: Sheaths and probes in low-temperature plasmas .

    Contact me if you are interested in this course spring 2020. 


     


    Member of research group