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  3. Åshild Fredriksen
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Fredriksen4NTVA3.jpg
Department of Physics and Technology ashild.fredriksen@uit.no +4777645133 Aurolab: 776 45141 Tromsø TEK 3.062

Åshild Fredriksen

Professor / Plasma and Space Physics

  • Buschmann, Lisa Marie; Fredriksen, Åshild. 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; Volum 31 (2). ISSN 0963-0252.s doi: 10.1088/1361-6595/ac47e5.
  • Antonsen, Tarjei; Mann, Ingrid; Vaverka, Jakub; Nouzak, Libor; Fredriksen, Åshild. A comparison of contact charging and impact ionization in low-velocity impacts: implications for dust detection in space. Annales Geophysicae 2021; Volum 39 (3). ISSN 0992-7689.s 533 - 548.s doi: 10.5194/angeo-39-533-2021.
  • Sado, Pascal; Fredriksen, Åshild. Detailed density and ion energy profiles downstream of a small ECR plasma source. IEEE Transactions on Plasma Science 2020; Volum 48 (12). ISSN 0093-3813.s 4181 - 4190.s doi: 10.1109/TPS.2020.3037356.
  • Fredriksen, Åshild; Pécseli, Hans L; Trulsen, Jan Karsten. Anomalous transport due to large coherent structures in a magnetized toroidal plasma. Plasma Physics and Controlled Fusion 2020; Volum 63 (1). ISSN 0741-3335.s doi: 10.1088/1361-6587/abc518.
  • Trollvik, Henriette Marie Tveitnes; Gunnarsdottir, Tinna; Mann, Ingrid; Olsen, Sveinung viggo; Restad, Erlend Sømhovd; Antonsen, Tarjei; Havnes, Ove; Fredriksen, Åshild; Boothby, Christoffer; Bjørk, Arne; Hansen, Rikke Hedelund; Floer, Markus; Eilertsen, Yngve; Latteck, Ralph. Observation of mesospheric dust and ionospheric conditions during the G-chaser rocket campaign. ESA SP 2019. ISSN 0379-6566.
  • Gunnarsdottir, Tinna; Trollvik, Henriette; Mann, Ingrid; Olsen, Sveinung viggo; Eilertsen, Yngve; Antonsen, Tarjei; Restad, Erlend Sømhovd; Bjørk, Arne; Havnes, Ove; Fredriksen, Åshild; Boothby, Christoffer; Hansen, Rikke Hedelund; Floer, Markus. CHARGING AND DETECTION OF MESOSPHERIC DUST WITH INSTRUMENT SPID ON G-CHASER ROCKET. ESA SP 2019. ISSN 0379-6566.
  • Mann, Ingrid; Nouzák, Libor; Vaverka, Jakub; Antonsen, Tarjei; Fredriksen, Åshild; Issautier, Karine; Malaspina, David; Meyer-Vernet, Nicole; Pavlů, Jiří; Sternovsky, Zoltan; Stude, Joan; Ye, Shengyi; Zaslavsky, Arnaud. Dust observations with antenna measurements and its prospects for observations with Parker Solar Probe and Solar Orbiter. Annales Geophysicae 2019; Volum 37 (6). ISSN 0992-7689.s 1121 - 1140.s doi: 10.5194/angeo-37-1121-2019.
  • Varberg, Erik; Fredriksen, Åshild. Effect of permanent magnets on plasma confinement and ion beam properties in a double layer helicon plasma source. Journal of Plasma Physics 2019; Volum 85 (3). ISSN 0022-3778.s 905850310 - .s doi: 10.1017/S0022377819000412.
  • Havnes, Ove; Antonsen, Tarjei; Baumgarten, Gerd; Hartquist, Thomas W.; Biebricher, Alexander; Fredriksen, Åshild; Friedrich, Martin; Hedin, Jonas. A new method of inferring the size, number density, and charge of mesospheric dust from its in situ collection by the DUSTY probe. (data) Atmospheric Measurement Techniques 2019; Volum 12 (3). ISSN 1867-1381.s 1673 - 1683.s doi: 10.5194/amt-12-1673-2019.
  • Fredriksen, Åshild; Pecseli, Hans; Trulsen, Jan Karsten. A solvable model for the basic properties of a simple magnetized plasma torus. Plasma Physics and Controlled Fusion 2018; Volum 60:085021 (8). ISSN 0741-3335.s doi: 10.1088/1361-6587/aacd2a.
  • Gulbrandsen, Njål; Fredriksen, Åshild. RFEA Measurements of High-Energy Electrons in a Helicon Plasma Device with Expanding Magnetic Field. Frontiers in Physics 2017; Volum 5. ISSN 2296-424X.s 1 - 8.s doi: 10.3389/fphy.2017.00002.
  • Bhattacharjee, Sudeep; Fredriksen, Åshild; Chandra, Sayan. Fluctuations in electron cyclotron resonance plasma in a divergent magnetic field. Physics of Plasmas 2016; Volum 23 (2). ISSN 1070-664X.s 1 - 7.s doi: 10.1063/1.4941595.
  • Havnes, Ove; Antonsen, Tarjei; Hartquist, Thomas W.; Fredriksen, Åshild; Plane, John M.C.. The Tromsø programme of in situ and sample return studies of mesospheric nanoparticles. Journal of Atmospheric and Solar-Terrestrial Physics 2015; Volum 127. ISSN 1364-6826.s 129 - 136.s doi: 10.1016/j.jastp.2014.09.010.
  • Gulbrandsen, Njål; Fredriksen, Åshild; Carr, Jr, Jerry; Scime, Earl. A comparison of ion beam measurements by retarding field energy analyzer and laser induced fluorescence in helicon plasma devices. Physics of Plasmas 2015; Volum 22 (3). ISSN 1070-664X.s doi: 10.1063/1.4913990.
  • Bergsaker, Anne Schad; Fredriksen, Åshild; Pecseli, Hans; Trulsen, Jan Karsten. Models for the probability densities of the turbulent plasma flux in magnetized plasmas. Physica Scripta 2015; Volum 90 (10). ISSN 0031-8949.s doi: 10.1088/0031-8949/90/10/108005.
  • Fredriksen, Åshild; Gulbrandsen, Njål. Beam formation in a weakly collisional expanding, inductively coupled plasma.. (sammendrag) IEEE Sarnoff Symposium 2014 ISBN 978-1-4673-5225-3.s doi: 10.1109/ursigass.2014.6929899.
  • Bergsaker, Anne Schad; Fredriksen, Åshild; Pecseli, Hans; Trulsen, Jan Karsten. Analytical models for skewness-kurtosis relations in turbulent transport. (fulltekst) 2014 ISBN 2-914771-90-8.
  • Gulbrandsen, Njål; Fredriksen, Åshild. The role of collisions for beam formation in a plasma potential gradient. (fulltekst) 2014 ISBN 2-914771-90-8.
  • Havnes, Ove; Antonsen, Tarjei; Fredriksen, Åshild; Olsen, Sveinung Viggo; Eilertsen, Yngve; Strømmesen, Inge o. ICON, A MASS ANALYZER FOR THE ICE CONTENT OF NLC/PMSE PARTICLES. ESA SP 2013. ISSN 0379-6566.s 441 - 444.
  • Gulbrandsen, Njål; Miloch, Wojciech Jacek; Fredriksen, Åshild. Interpretation of Ion Velocity Distributions Measured with a Grounded Retarding Field Energy Analyzer (RFEA) in an Inductively Coupled Helicon Plasma. Contributions to Plasma Physics 2013; Volum 53 (1). ISSN 0863-1042.s 27 - 32.s doi: 10.1002/ctpp.201310005.
  • Fredriksen, Åshild; Miloch, Wojciech Jacek; Gulbrandsen, Njål; Mishra, Lekha Nath. On the Use of a Retarding Field Energy Analyzer for Plasma Flow Analysis. Contributions to Plasma Physics 2013; Volum 53 (1). ISSN 0863-1042.s 86 - 91.s doi: 10.1002/ctpp.201310015.
  • Barni, R.; Riccardi, C; Fredriksen, Åshild. Structure dynamics associated with temperature fluctuations in the magnetised plasma of the Thorello device. (fulltekst) Curran Associates, Inc. 2012 ISBN 9781618395931.s 632 - 636.
  • Fattorini, L.; Fredriksen, Åshild; Pecseli, Hans; Riccardi, C.; Trulsen, Jan Karsten. Turbulent transport in a toroidal magnetized plasma. Plasma Physics and Controlled Fusion 2012; Volum 54 (8). ISSN 0741-3335.s doi: 10.1088/0741-3335/54/8/085017.
  • Miloch, Wojciech Jacek; Gulbrandsen, Njål; Mishra, Lekha Nath; Fredriksen, Åshild. Ion velocity distributions in the sheath and presheath of a biased object in plasma. Physics of Plasmas 2011; Volum 18 (8). ISSN 1070-664X.s doi: 10.1063/1.3614520.
  • Fredriksen, Åshild; Mishra, Lekha Nath; Byhring, Hanne Sigrun. The effects of downstream magnetic field on current-free double layers and beam formation in the Njord helicon plasma device. Plasma Sources Science & Technology 2010; Volum 19 (3). ISSN 0963-0252.s doi: 10.1088/0963-0252/19/3/034009.
  • Fredriksen, Åshild; Mishra, Lekha Nath; Gulbrandsen, Njål; Miloch, Wojciech Jacek. On the measurement of subsonic flow in a capacitevly coupled helicon plasma source. (data) Journal of Physics: Conference Series (JPCS) 2010; Volum 257. ISSN 1742-6588.s doi: 10.1088/1742-6596/257/1/012019.
  • Miloch, Wojciech Jacek; Gulbrandsen, Njål; Mishra, Lekha Nath; Fredriksen, Åshild. The role of acceptance angle in measurements with ion energy analyzers: Study by numerical simulations. (data) Applied Physics Letters 2010; Volum 97 (26). ISSN 0003-6951.s doi: 10.1063/1.3531757.
  • Fredriksen, Åshild; Borg, Anne. Report from Norway on the Participation of Women in Physics. 2009 (1119) ISBN 978-0-7354-0645-2. ISSN 0094-243X.s 149 - 150.
  • Fredriksen, Åshild; Byhring, Hanne Sigrun; Charles, Christine; Mishra, Lekha Nath; Boswell, Rod. Double Layer Beam Formation in the Njord Device and its Dependence on Magnetic Field Configuration. 2008 ISBN 2914771525.
  • Riccardi, Claudia; Barni, Ruggero; Roman, Eduardo; Fredriksen, Åshild. Anomalous fluctuations in the simple magnetized plasma. Research Signpost 2008 ISBN 9788130802558.s 123 - 144.
  • Byhring, Hanne Sigrun; Charles, Christine; Fredriksen, Åshild; Boswell, Rod. Double layer in an expanding plasma: Simultaneous upstream and downstream measurements. Physics of Plasmas 2008; Volum 15 (10). ISSN 1070-664X.s doi: 10.1063/1.3002396.
  • Fredriksen, Åshild; Fredriksen, A.A.; Pecseli, Hans L.; Trulsen, Jan. Crash and recovery of the potential in a toroidal plasma column, as observed by generalized conditional sampling. New Journal of Physics 2008; Volum 10 (033030). ISSN 1367-2630.s doi: 10.1088/1367-2630/10/3/033030.
  • Fredriksen, Åshild; Riccardi, Claudia; Magni, Simone. Effects of edge dc biasing on plasma rotation and transport in a toroidal geometry. Physica Scripta 2006; Volum T122. ISSN 0031-8949.
  • Fredriksen, Åshild; Riccardi, Claudia; Roman, Eduardo; Barni, Ruggero. Coherent structures in sheared velocity flow. 2006 ISBN 2-914771-40-1.
  • Aanesland, Ane; Charles, C.; Boswell, R.; Fredriksen, Åshild. Fluctuation in a Helicon plasma with additional immersed antenna. IEEE Transactions on Plasma Science 2005; Volum 33. ISSN 0093-3813.
  • Levinton, Fred; Fredriksen, Åshild. Diagnostic method for the measurement of coherent magnetic field fluctuations. Review of Scientific Instruments 2004; Volum 75 (10). ISSN 0034-6748.s 4162 - 4164.
  • Riccardi, Claudia; Barni, Ruggero; Fredriksen, Åshild. Determination of velocity shears in a simple magnetized torus by means of a combined Langmuir and Mach probe. Review of Scientific Instruments 2004; Volum 75 (10). ISSN 0034-6748.s 4341 - 4343.
  • Aanesland, Ane; Charles, Christine; Boswell, Rod; Fredriksen, Åshild. Helicon plasma with additional immersed antenna. Journal of Physics D: Applied Physics 2004; Volum 37 (9). ISSN 0022-3727.s 1334 - 1341.
  • Fredriksen, Åshild; Riccardi, C.; Cartegni, L; Draghi, D; Battistoni, R. Trasarti; Roman, H. E.. Statistical analysis of turbulent flux and intermittency in the non-fusion magnetoplasma Blaamann. Physics of Plasmas 2003 (10). ISSN 1070-664X.s 4335 - 4340.
  • Fredriksen, Åshild; Riccardi, C.; Cartegni, L; Pecseli, Hans L.. Coherent structures and intermittency in Blaamann. Plasma Physics and Controlled Fusion 2003; Volum 45. ISSN 0741-3335.s 721 - 733.
  • Fredriksen, Åshild; Riccardi, C.; Cartegni, L. Measurements of coherent structures and transport in the full cross section of magnetized plasma. Review of Scientific Instruments 2003; Volum 74. ISSN 0034-6748.s 1588 - 1591.
  • Aanesland, Ane; Charles, Christine; Boswell, Rod; Fredriksen, Åshild. Sputtering effects in a helicon plasma with an additional immersed antenna. Plasma Sources Science & Technology 2003; Volum 12. ISSN 0963-0252.s 85 - 88.
  • Aanesland, Ane; Fredriksen, Åshild. ECR harmonics and wall material effects in a microwave disharge. Review of Scientific Instruments 2003; Volum 74. ISSN 0034-6748.s 4336 - 4341.
  • Toader, E.I.; Fredriksen, Åshild; Aanesland, Ane. Complex structure of the electronic energy distribution function observed in electron cyclotron resonance nitrogen plasma. Review of Scientific Instruments 2003 (74). ISSN 0034-6748.s 3279 - 3283.
  • Fredriksen, Åshild. Plasma- og gassutladningssympoiet 2002. Fra Fysikkens Verden 2002 (2). ISSN 0015-9247.s 52 - .
  • Fredriksen, Åshild; Riccardi, C.; Longoni, G.. Diagnostic of electron temperature fluctuations in a turbulent plasma. Review of Scientific Instruments 2001; Volum 72. ISSN 0034-6748.s 457 - .
  • Riccardi, C.; Fredriksen, Åshild. Waves and coherent structures in the turbulent plasma of a simple magnetized torus. Physics of Plasmas 2001; Volum 8. ISSN 1070-664X.s 199 - 209.
  • Aanesland, Ane; Fredriksen, Åshild. Pressure and density dependent mode transition in an electron cyclotron resonance plasma. Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films 2001; Volum 19. ISSN 0734-2101.s 2446 - 2452.
  • Riccardi, C.; Chiodini, G.; Bevilacqua, C.; Barni, R.; Fredriksen, Åshild; Fontanesi, M.. Bohm like Transport in a Toroidal Magnetoplasma in the Absence of Longitudinal Current. Physica Scripta 2000; Volum T84. ISSN 0031-8949.s 103 - 106.
  • Øynes, F. J.; Olsen, O.-M.; Pecseli, Hans L.; Fredriksen, Åshild; Rypdal, Kristoffer. Experimental study of low-frequency electrstatic fluctuations in a magnetized toroidal plasma. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics 1998; Volum 57. ISSN 1539-3755.s 2242 - 2255.
  • Rypdal, Kristoffer; Fredriksen, Åshild; Olsen, O. M.; Hellblom, G.. Microwave Plasma in a Simple Magnetized Torus. Physics of Plasmas 1997; Volum 4. ISSN 1070-664X.s 1468 - 1480.
  • Armstrong, Richard; Fredriksen, Åshild; Grønvoll, E.; Batani, D.; Galassi, A.; Pisani, F.. Measurements of Ion Temperature in Weakly Ionised, Steady-State Plasmas. Physics essays 1997; Volum 10 (3). ISSN 0836-1398.s 483 - 491.
  • Hwang, Y. S.; Fredriksen, Åshild; Qin, H; Forest, C. B.; Ono, M.. Polarimetry for the CDX-U tokamak. Review of Scientific Instruments 1995; Volum 66. ISSN 0034-6748.s 379 - 381.
  • Rypdal, Kristoffer; Grønvoll, E.; Øynes, F. J.; Fredriksen, Åshild; Armstrong, Richard; Trulsen, Jan; Pecseli, Hans L.. Confinement an turbulent transport in a plasma torus with no rotational transform. Plasma Physics and Controlled Fusion 1994; Volum 36. ISSN 0741-3335.s 1099 - 1114.
  • Fredriksen, Åshild; Bjørnå, Noralv; Lilensten, J.. Incoherent Scatter Plasma Lines at Angles with the Magnetic Field. Journal of Geophysical Research (JGR) 1992; Volum 97. ISSN 0148-0227.s 16921 - 16933.
  • Fredriksen, Åshild; La Hoz, Cesar. Measurements of Chirped Natural Plasma Lines with EISCAT. Advances in Space Research 1991; Volum 12 (6). ISSN 0273-1177.s 231 - 234.
  • Fredriksen, Åshild. High Latitude Quiet Summer Ion Composition Profiles Derived from a Combined Ion Line/ Plasma Line Incoherent Scatter Eperiment. Journal of Atmospheric and Terrestrial Physics 1990; Volum 52. ISSN 0021-9169.s 77 - 84.
  • Fredriksen, Åshild; Bjørnå, Noralv; Hansen, Truls Lynne. First EISCAT Two-Radar Plasma-Line Experiment. Journal of Geophysical Research (JGR) 1989; Volum 94. ISSN 0148-0227.s 2727 - 2731.
  • Armstrong, Richard; Fredriksen, Åshild; Pecseli, Hans L.; Trulsen, Jan. Electron Bernstein Waves in Inhomogeneous Magnetic Fields. Plasma Physics and Controlled Fusion 1984; Volum 26. ISSN 0741-3335.s 703 - 716.
  • Mann, Ingrid; Olsen, Sveinung viggo; Eilertsen, Yngve; Trollvik, Henriette; Pinneau, Adrien; Strmic Palinkas, Sabina; Gunnarsdóttir, Tinna Líf; Greaker, Herman Larsen; Fredriksen, Åshild; Spicher, Andres; Narayanan, Viswanathan Lakshmi. Plans for Mesospheric Dust Studies with MXD2. The 25th ESA Symposium on European Rocket and Balloon Programmes and Related Research 2022-05-01 - 2022-05-05 2022.
  • Fredriksen, Åshild; Gulbrandsen, Njål; Buschmann, Lisa Marie; Varberg, Erik. On the ion beams and energetic electrons through a current-free double layer(CFDL). AAPPS-DPP2019 2019-11-04 - 2019-11-09 2019.
  • Buschmann, Lisa Marie; Gulbrandsen, Njål; Fredriksen, Åshild. Energetic electrons upstream and downstream of a current-free double layer (CFDL) in an inductively coupled helicon plasma.. International Conference on Electromagnetics in Advanced Applications (ICEAA 2019) 2019-09-09 - 2019-09-13 2019.
  • Sado, Pascal; Fredriksen, Åshild. On confinement and plasma acceleration from a small ECR plasma source. EPS 46th Conference on Plasma Physics 2019-07-08 - 2019-07-12 2019.
  • Fredriksen, Åshild. Activity and future plans for studies of dust in the mesosphere at Dep. Physics and Technology, UIT. Norsk Sonderakett Workshop 2019-02-08 - 2019-02-08 2019.
  • Fredriksen, Åshild; Mann, Ingrid; Antonsen, Tarjei; DeLuca, Michael; Fontanese, John; Sternovsky, Zoltan. Laboratory simulations of hypervelocity dust impacts on spacecraft. Fysikermøtet i Oslo 2019-08-07 - 2019-08-09 2019.
  • Gunnarsdottir, Tinna; Trollvik, Henriette; Mann, Ingrid; Olsen, Sveinung viggo; Eilertsen, Yngve; Antonsen, Tarjei; Björk, Arne; Restad, Erlend; Havnes, Ove; Fredriksen, Åshild; Boothby, Christoffer; Hansen, Rikke Hedelund; Floer, Markus. CHARGING AND DETECTION OF MESOSPHERIC DUST WITH INSTRUMENT SPID ON G-CHASER ROCKET. 24th ESA Symposium on European Rocket and Balloon Programmes and Related Research 2019-06-16 - 2019-06-21 2019.
  • Trollvik, Henriette Marie Tveitnes; Gunnarsdottir, Tinna; Mann, Ingrid; Olsen, Sveinung viggo; Restad, Erlend; Antonsen, Tarjei; Havnes, Ove; Fredriksen, Åshild; Boothby, Christoffer; Björk, Arne; Hansen, Rikke Hedelund; Floer, Markus; Eilertsen, Yngve; Latteck, Ralph. Observation of mesospheric dust and ionospheric conditions during the G-chaser rocket campaign. The 24th ESA Symposion on European Rocket and Balloon programmes and related research 2019-06-16 - 2019-06-20 2019.
  • Mann, Ingrid; Moen, Jøran Idar; Blix, Kolbjørn; Fredriksen, Åshild; Graversen, Rune; Havnes, Ove; Hall, Chris. MESOSPHERIC AND MIDDLE ATMOSPHERIC STUDIES IN NORWAY AND INTERNATIONAL COLLABORATION. 24th ESA Symposium on European Rocket and Balloon Programmes and Related Research 2019-06-16 - 2019-06-20 2019.
  • Mann, Ingrid; Gunnarsdottir, Tinna; Trollvik, Henriette; Fredriksen, Åshild; Antonsen, Tarjei; Havnes, Ove. Nanoparticles in Earth's ionosphere – detection from rockets. NW2SD international conference - From the Nanoworld to Stardust 2019-07-17 - 2019-07-19 2019.
  • Fredriksen, Åshild; Gulbrandsen, Njål; Buschmann, Lisa. Energetic electrons near a current-free double layer in inductively coupled helicon plasma.. Seminar at Department of Physics, IIT 2018-12-18 - 2018-12-18 2018.
  • Fredriksen, Åshild. Laboratory plasma simulation of impacts. Physics of Dust Impacts ISSI project meeting 2018-06-03 - 2018-06-08 2018.
  • Fredriksen, Åshild. Women in Physics-Norway. Gender in Physics Days 2017-01-27 - 2017-01-27 2017.
  • Varberg, Erik; Fredriksen, Åshild. Effect of permanent magnets on plasma confinement and ion beams from a helicon plasma source. XXXIII International Conference on Phenomena in Ionized Gases (fulltekst) 2017-07-09 - 2017-07-14 2017.
  • Nilsen, Kenneth; Fredriksen, Åshild; Mann, Ingrid. Plasma Clouds from Vacuum Arcs in a Laboratory Experiment - A Possible Simulation Tool for Impact Clouds from Hypervelocity Dust Impact?. 8th International Conference on the Physics of Dusty Plasmas 2017-05-20 - 2017-05-25 2017.
  • Antonsen, Tarjei; Havnes, Ove; Fredriksen, Åshild; Friedrich, Martin; Sternovsky, Zoltan; Plane, John M.C.; Hartquist, Tom; Olsen, Sveinung viggo; Eilertsen, Yngve; Trondsen, Espen; Mann, Ingrid; Gumbel, Jörg; Moen, Jøran Idar; Latteck, Ralph; Baumgarten, Gerd; Höffner, Josef; Hoppe, Ulf-Peter; Karlberg, Jan Ove. Mesospheric dust observations during the MAXIDUSTY campaign. EGU General Assembly 2017-04-23 - 2017-04-28 2017.
  • Fredriksen, Åshild; Gulbrandsen, Njål. Beam formation in a weakly collisional expanding, inductively coupled plasma.. XXXIth URSI General Assembly and Scientific Symposium (URSI GASS) 2014-08-16 - 2014-08-23 2014.
  • Gulbrandsen, Njål; Fredriksen, Åshild. The role of collisions for beam formation in a plasma potential gradient. 41st EPS Conference on Plasma Physics 2014-06-23 - 2014-06-27 2014.
  • Gulbrandsen, Njål; Fredriksen, Åshild. Comparison of ion beam diagnostics with laser induced fluorescence (LIF) and retarding field energy analyzer (RFEA) in a low-temperature RF-plasma. 41st EPS Conference on Plasma Physics 2014-06-23 - 2014-06-27 2014.
  • Bergsaker, Anne Schad; Fredriksen, Åshild; Pecseli, Hans; Trulsen, Jan Karsten. Analytical models for skewness-kurtosis relations in turbulent transport. 41st EPS Conference on Plasma Physics 2014-06-23 - 2014-06-27 2014.
  • Fredriksen, Åshild. Ny rocket science: Plasmaraketter setter fart på romfartøyer. Den internasjonale romfartsdagen 2013-04-12 - 2013-04-12 2013.
  • Fredriksen, Åshild. Introduction to the Physics Department and Space research at UiT. Studentbesøk fra St. Andrews 2013-01-14 - 2013-01-14 2013.
  • Fredriksen, Åshild. On ion flow measurements in low-temperature plasmas. PhD. seminar 2013-11-19 - 2013-11-19 2013.
  • Fredriksen, Åshild. Beam and flow studies in an expanding plasma. Gruppeseminar 2013-11-04 - 2013-11-04 2013.
  • Fredriksen, Åshild; Gulbrandsen, Njål. Ion beam formation in a plasma with expanding magnetic field. Fysikermøtet i Bergen 2013-08-07 - 2013-08-10 2013.
  • Fredriksen, Åshild; Gulbrandsen, Njål; Miloch, Wojciech Jacek. Potential and ion flow profiles in a Helicon-source plasma. IPELS (Interrellations between Plasma Experiments in Laboratory and Space 2013-07-01 - 2013-07-05 2013.
  • Holst, Bodil; Fredriksen, Åshild; Borg, Anne. On the Recruitment and Participation of Women in Physics: A Report from Norway. AIP Conference Proceedings 2013; Volum 1517. ISSN 0094-243X.s 180 - 180.
  • Fredriksen, Åshild; Gulbrandsen, Njål; Miloch, Wojciech Jacek; Hansen, Alexander; Scime, Earl. Plasma flows in expanding magnetic field: simulations, probe and Laser Induced Fluorescence (LIF) measurements. XXI ESCAMPIG (Europhysics Conference on the Atomic and Molecular Physics of Ionized Gases) 2012-07-10 - 2012-07-14 2012.
  • Gulbrandsen, Njål; Fredriksen, Åshild; Carr Jr, Jerry; Scime, Earl; McCarren, Dustin W.; VanDervort, Robert; Galante, Matthew E.; Magee, Richard M.; Lusk, Greg; Sears, Stephanie H.. A comparison of ion velocity measurements from retarding field energy analyzer (RFEA) and laser induced fluorescence (LIF) in expanding helicon plasma. 54th Annual Meeting of the APS Division of Plasma Physics 2012-10-29 - 2012-12-02 2012.
  • Fredriksen, Åshild; Gulbrandsen, Njål; Miloch, Wojciech Jacek. Plasma flows in expanding magnetic field. 39th EPS Conf. on Plasma Physics/16th Int. Conf. on Plasma Physics 2012-07-02 - 2012-07-06 2012.
  • Fredriksen, Åshild; Miloch, Wojciech Jacek; Gulbrandsen, Njål; Mishra, Lekha Nath. On the use of a retarding field energy analyzer for plasma flow analysis. 9th International Workshop on Electrical Probes in Magnetized Plasmas (IWEP 2011) 2011-09-21 - 2011-09-23 2011.
  • Fredriksen, Åshild. Plasma flows in the laboratory plasma of the Njord device. Fysikermøtet 2011-06-20 - 2011-06-22 2011.
  • Barni, Ruggero; Riccardi, Claudia; Fredriksen, Åshild. Structure dynamics associated with temperature fluctuations in the magnetised plasma of the Thorello device. EPS Div. Plasma Physics Conference (fulltekst) 2011-06-27 - 2011-07-01 2011.
  • Fredriksen, Åshild; Miloch, Wojciech Jacek; Gulbrandsen, Njål; Mishra, Lekha Nath. The role of sheath and acceptance angle in front of a retarding field energy analyzer for plasma flow analysis. 30th URSI General Assembly and Scientific Symposium of International Union of Radio Science 2011-08-13 - 2011-08-20 2011.
  • Gulbrandsen, Njål; Miloch, Wojciech Jacek; Fredriksen, Åshild. Interpretation of ion velocity distributions measured with a retartding field energy analyzer (RFEA) in a inducitively coupled helicon plasma. 30th URSI General Assembly and Scientific Symposium of International Union of Radio Science 2011-08-13 - 2011-08-20 2011.
  • Fredriksen, Åshild; Mishra, Lekha Nath; Gulbrandsen, Njål; Miloch, Wojciech Jacek. Magnetic field geometry, beams and flows in the inductively coupled helicon plasma Njord. 25th Summer School and International Symposium on the Physics of Ionized Gases 2010-08-30 - 2010-09-03 2010.
  • Miloch, Wojciech Jacek; Mishra, Lekha Nath; Gulbrandsen, Njål; Fredriksen, Åshild. Numerical simulations of the influence of an ion beam on the plasma analyzer performance in Njord helicon device. 63rd Annual Gaseous Electronics Conference & 7th International Conference on Reactive Plasmas 2010-10-04 - 2010-10-08 2010.
  • Fredriksen, Åshild; Borg, Anne. Kvinneandelen i fysikk ved universitetene og i høyere utdanning. Fra Fysikkens Verden 2009; Volum 71 (4). ISSN 0015-9247.s 126 - 127.
  • Fredriksen, Åshild. Application of Langmuir probes in RF plasmas. Course on Plasma Diagnostics at Institute for Ion Physics and Applied Physics, Innsbrück 2009-12-10 - 2009.
  • Fredriksen, Åshild. The formation of beams and instabilities in Njord. Course on Plasma Diagnostics at Institute for Ion Physics and Applied Physics, Innsbrück 2009-12-15 - 2009.
  • Fredriksen, Åshild; Mishra, Lekha Nath; Byhring, Hanne Sigrun. The formation of beams and instabilities in Njord – a new plasma device for space related experiments. XXIX International Conference on Phenomena in Ionized Gases 2009-07-12 - 2009-07-17 2009.
  • Fredriksen, Åshild; Mishra, Lekha Nath; Byhring, Hanne Sigrun; Charles, Christine; Boswell, Rod. Confinement and instabilities in Njord - dependence on magnetic field geometry. 10th International Workshop on Interrelations between Plasma Experiments in 2009-06-08 - 2009-06-12 2009.
  • Fredriksen, Åshild. DC plasma discharges, inductively coupled plasma sources- and helicon devices’. Seminar ved Institute for Ion Physics and Applied Physics, Innsbrück 2009-03-27 - 2009-03-27 2009.
  • Fredriksen, Åshild. On double layers in the Njord plasma device at University of Tromsø. Seminar ved \Ecole Polytechnique, Paris 2009-03-30 - 2009-03-30 2009.
  • Byhring, Hanne Sigrun; Charles, Christine; Fredriksen, Åshild; Boswell, Rod. Double layer in an expanding plasma: Simultaneous upstream and downstream measurements (vol 15, 102113, 2008). Physics of Plasmas 2009; Volum 16. ISSN 1070-664X.s doi: 10.1063/1.3167392.
  • Fredriksen, Åshild. Hvor stor andel førstestillinger?. Forskerforum 2008 (10). ISSN 0800-1715.s 41 - .
  • Fredriksen, Åshild; Byhring, Hanne Sigrun; Charles, Christine; Mishra, Lekha Nath; Boswell, Rod. Double Layer Beam Formation in the Njord Device and its Dependence on Magnetic Field Configuration. 35th EPS Conference on plasma physics 2008-06-09 - 2008-06-13 2008.
  • Fredriksen, Åshild; Borg, Anne. On the participation of women in physics in Norway. The 3rd IUPAP International Conference on Women in Physics 2008 2008-10-08 - 2008-10-10 2008.
  • Byhring, Hanne Sigrun; Charles, Christine; Fredriksen, Åshild; Boswell, Rod. Double layer in an inductively coupled laboratory plasma- simultaneous upstream and downstream measurements. 37th Committee on Space Research (COSPAR) Scientific Assembly 2008-07-13 - 2008-07-20 2008.
  • Fredriksen, Åshild; Tribulato, Giulio; Watts, Christopher. First results from the Njord device for space related plasma experiments. IPELS 2007 (Interrelationship between Plasma Exps. in Lab. & Space 2007-08-05 - 2007-08-10 2007.
  • Fredriksen, Åshild. Kan mysterier i solvinden og bordlyset utforskes i et laboratorium?. Kvinneforskermaraton (fulltekst) 2007-09-22 - 2007.
  • Fredriksen, Åshild. Hva gjør vi på Aurolab (plasmalaben)? Kan  eksperimenter i laboratoriet si oss noe om plasmaprosesser i vårt nære  verdensrom?. Instituttseminar 2007-11-28 - 2007.
  • Fredriksen, Åshild; Bhattacharjee, Sudeep. Coherent modes and fluctuations in an electron-cyclotron resonance (ECR) plasma in a diverging magnetic field. 34th EPS Conference on Plasma Physics 2007-07-02 - 2007-07-06 2007.
  • Fredriksen, Åshild; Aanesland, Ane; Flikwert, A.; Charles, Christine; Boswell, Rod. A study of the coupling between the helicon pump wave and instabilities associated with a current-free double layer in Chi Kung. 8th Asia-Pacific Conference on Plasma Science and Technology 2006-07-02 - 2006-07-05 2006.
  • Fredriksen, Åshild; Riccardi, Claudia; Roman, Eduardo; Barni, Ruggero. Coherent structures in sheared velocity flow. 33rd Conference European Physical Society (fulltekst) 2006-06-19 - 2006-06-23 2006.
  • Hellesø, Olav Gaute; Hanssen, Alfred; Fredriksen, Åshild. NSB-tog i Tromsø. Fra Fysikkens Verden 2005 (3). ISSN 0015-9247.s 71 - 73.
  • Fredriksen, Åshild. Ut i verdensrommet med plasmadrift. Kvinneforskermaraton 2005 (fulltekst) 2005-10-01 - 2005-10-01 2005.
  • Fredriksen, Åshild; Borg, Anne. Status of Women in Physics in Norway. Second IUPAP International Conference on Women in Physics (sammendrag) 2005-05-23 - 2005-05-25 2005.
  • Fredriksen, Åshild. The Tromsø Space Plasma Experiment. 8th International Workshop on Interrelations between Plasma Experiments 2005-07-04 - 2005-07-08 2005.
  • Fredriksen, Åshild; Riccardi, Claudia. Effects of Edge DC Biasing on Plasma Rotation and Transport in a Toroidal Geometry. 2005 47th Annual Meeting of the Division of Plasma Physics 2005-10-24 - 2005-10-28 2005.
  • Fredriksen, Åshild; Riccardi, Claudia; Cartegni, Lucia; Roman, Eduardo. Response to "Comment on 'Statistical analysis of turbulent flux and intermittency in the nonfusion magnetoplasma Blaamann' "[Phys. Plasmas 11, 3679 (2004)]. Physics of Plasmas 2004; Volum 11 (7). ISSN 1070-664X.s 3682 - 3683.
  • Fredriksen, Åshild; Riccardi, Claudia; Barni, Ruggero. Determination of velocity shears in a simple magnetized torus by means of a combined Langmuir and Mach probe. 15th Topical Conference on High-Temperature Plasma Diagnosticcs 2004-04-19 - 2004-04-22 2004.
  • Fredriksen, Åshild; Levinton, Fred. A diagnostic method for the measurement of coherent magnetic field fluctuations. 15th Topical Conference on High-Temperature Plasma Diagnostics 2004-04-19 - 2004-04-22 2004.
  • Fredriksen, Åshild; Riccardi, Claudia; Magni, Simone. Studies of effects of edge and interior DC biasing on plasma rotation and transport in a toroidal geometry. 12th International Congress on Plasma Physics 2004-10-25 - 2004-10-29 2004.
  • Fredriksen, Åshild. Studies of effects of edge and interior DC biasing on plasma rotation and transport in a toroidal geometry. Third Nordic Symposium on Plasma Physics 2004-10-04 - 2004-10-07 2004.
  • Fredriksen, Åshild. Virvler rundt i ring � om plasmaturbulensen i Blaamann. Populærvitenskapelig seminar, 2003-02-15 - 2003.
  • Fredriksen, Åshild. Plasma i nordlys og nytte. Åpen Dag, 2003-01-15 - 2003.
  • Fredriksen, Åshild; Riccardi, C.. A comparison between total particle flux and flux derived from coherent structures in a simple magntized torus. 45th Annual Meeting of the APS Division of Plasma Physics,, 2003-10-27 - 2003-10-31 2003.
  • Fredriksen, Åshild; Riccardi, C.; Cartegni, L; Pecseli, Hans L.. Time-resolved turbulent structures and particle fluxes in a magnetized plasma. Fysikermøtet 2003, , Norway, August 9-12, 2003 2003-08-09 - 2003-08-12 2003.
  • Fredriksen, Åshild. On women in Norway in the Physics Power Struggle. The IUPAP Internatonal Conference on Women in Physics, 2002-03-06 - 2002-03-09 2002.
  • Fredriksen, Åshild; Riccardi, C.; Longoni, G.. Diagnostics of electron temperature fluctuations in a turbulent plasma. 13th Topical Conference on High Temperature Plasma Diagnostics 2002-06-18 - 2002-06-22 2002.
  • Fredriksen, Åshild; Borg, A.. Norwegian policy of equal opportunities - effective in physsics?. IUPAP Womwn in Physics Conference 2002-03-06 - 2002-03-09 2002.
  • Fredriksen, Åshild; Riccardi, C.; Cartegni, Lucia; Pecseli, Hans L.. Outward flux events in Blaamann as derives from contitionally averaged coherent averaged coherent structures. 36th Nordic Plasma and Gas Discharge Symposium 2002-02-23 - 2002-02-26 2002.
  • Fredriksen, Åshild; Riccardi, C.; Cartegni, Lucia; Pecseli, Hans L.. Outward flux events in Blaamann as derived from conditonally averaged coherent structures. 36th Nordic Plasma and Gas Discharge Symposium 2002-02-23 - 2002-02-26 2002.
  • Fredriksen, Åshild; Riccardi, C.; Cartegni, Lucia; Pecseli, Hans L.. Conditionally sampled coherent structures and 2D particle transport in the blaamann torus. Int. Conf. Plasma Phys. Contr. Fusion 2002-07-15 - 2002-07-19 2002.
  • Aanesland, Ane; Charles, Christine; Boswell, Rod; Fredriksen, Åshild. Helicon plasma modification by an immersed current carrying rf antenna. 43rd Annual Meeting of the APS Division of Plasma Physics 2001-10-29 - 2001-11-02 2001.
  • Riccardi, C.; Fredriksen, Åshild; Cartegni, Lucia; Pecseli, Hans L.. Conditionally sampled coherent structures and global transport. 43rd Annual Meeting of the APS Division of Plasma Physics 2001-10-29 - 2001-11-02 2001.
  • Toader, E.I.; Fredriksen, Åshild; Aanesland, Ane. Energifordelinger for elektroner og ioner i et elektronsyklo- tronresonans-plasma. Plasma Physicist Meeting 2001-06-14 - 2001-06-17 2001.
  • Fredriksen, Åshild; Riccardi, C.. Analysis of Electron Temperature Fluctuations in a Simple Magnetised Torus". TTF Turbulence Workshop 2000-09-04 - 2000-09-07 2000.
  • Aanesland, Ane; Fredriksen, Åshild. A comprehensive investigation of plasma parameters in a pressure dependent plasma mode transition". 10th Int. Congress on Plasma Physics and the 42nd Ann. Meeting of the APS Division of Plasma Physics 2000-10-23 - 2000-10-27 2000.
  • Jain, K. K.; Fredriksen, Åshild; Armstrong, Richard. The role of ion mass in the equilibrium of a toroidal plasma. 1999.
  • Fredriksen, Åshild; Riccardi, C.. A parameter study of electrostatic fluctuations in Blaamann. TTF Turbulence Workshop 1999-03-03 - 1999-03-04 1999.
  • Kuritsyn, A.; Cohen, S.; Fredriksen, Åshild; Levinton, Fred. A Steady State Helicon Plasma Source. 41st Annual Meeting of the Division of Plasma Physics 1999-11-15 - 1999-11-19 1999.
  • Cohen, S.; Berlinger, B.; Corso, V.; Fahmy, F.; Gorman, J.; Levinton, F.; Lemunyan, G.; Fredriksen, Åshild. The Magnetic Nozzle Experiment. 41st Annual Meeting of the Division of Plasma Physics 1999-11-15 - 1999-11-19 1999.
  • Demidov, V.; Armstrong, Richard; Fredriksen, Åshild; Rypdal, Kristoffer. Probe studies in the toroidal device Blaamann. International Congress of Plasma Physics 1998-06-29 - 1998-07-03 1998.
  • Fredriksen, Åshild; Aanesland, Ane; Hellblom, G.; Rypdal, Kristoffer. ECR-device for studies of plasma for thin film deposition. 1998 International Congress of Plasma Physics 1998-06-29 - 1998-07-03 1998.
  • Armstrong, Richard; Demidov, V.; Fredriksen, Åshild. Probe Measurements of Electron Energy Distributions in a Magnetized Plasma of the Toroidal Device 'Blaamann'. 3rd Workshop on Electrical Probes in Magnetized Plasmas 1997-09-22 - 1997-09-25 1997.
  • Armstrong, Richard; Demidov, V.; Fredriksen, Åshild. Probe Measurements in the Toroidal Plasma Device 'Blaamann'. Proceedings 2nd Int. Arctic Seminar, Physics and Mathematics 1997-05-17 - 1997-05-17 1997.
    • Look at all works in CRIStin →

    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. 


     

    Researcher profile in Cristin

    Member of research group

    Space Physics   Norsk innhold