Wojciech J. Miloch

• Darian, Diako; Marholm, Sigvald; Mortensen, Mikael & Miloch, Wojciech Jacek (2019). Theory and simulations of spherical and cylindrical Langmuir probes in non-Maxwellian plasmas. Plasma Physics and Controlled Fusion.  ISSN 0741-3335.  61(8) . doi: 10.1088/1361-6587/ab27ff
• Darian, Diako; Miloch, Wojciech Jacek; Mortensen, Mikael; Miyake, Yohei & Usui, Hideyuki (2019). Numerical simulations of a dust grain in a flowing magnetized plasma. Physics of Plasmas.  ISSN 1070-664X.  26(043701), s 1- 14 . doi: 10.1063/1.5089631
• Jin, Yaqi; Moen, Jøran Idar; Spicher, Andres; Oksavik, Kjellmar; Miloch, Wojciech Jacek; Clausen, Lasse Boy Novock; Pożoga, Mariusz & Saito, Yoshifumi (2019). Simultaneous rocket and scintillation observations of plasma irregularities associated with a reversed flow event in the cusp ionosphere. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  124(8), s 7098- 7111 . doi: 10.1029/2019JA026942
• Jin, Yaqi; Spicher, Andres; Xiong, Chao; Clausen, Lasse Boy Novock; Kervalishvili, Guram; Stolle, Claudia & Miloch, Wojciech Jacek (2019). Ionospheric Plasma Irregularities Characterized by the Swarm Satellites: Statistics at High Latitudes. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  124(2), s 1262- 1282 . doi: 10.1029/2018JA026063
• Marholm, Sigvald; Marchand, Richard; Darian, Diako; Miloch, Wojciech Jacek & Mortensen, Mikael (2019). Impact of Miniaturized Fixed-Bias Multineedle Langmuir Probes on CubeSats. IEEE Transactions on Plasma Science.  ISSN 0093-3813.  47(8), s 3658- 3666 . doi: 10.1109/TPS.2019.2915810 Fulltekst i vitenarkiv.
• Paulsson, Joakim John Paul; Miyake, Y.; Miloch, Wojciech Jacek & Usui, H. (2019). Effects of booms of sounding rockets in flowing plasmas. Physics of Plasmas.  ISSN 1070-664X.  26(3) . doi: 10.1063/1.5051414
• Chernyshov, Aleksander A.; Spicher, Andres; Ilyasov, Askar A.; Miloch, Wojciech Jacek; Clausen, Lasse Boy Novock; Saito, Yoshifumi; Jin, Yaqi & Moen, Jøran Idar (2018). Studies of small-scale plasma inhomogeneities in the cusp ionosphere using sounding rocket data. Physics of Plasmas.  ISSN 1070-664X.  25(4) . doi: 10.1063/1.5026281 Fulltekst i vitenarkiv.
• Himpel, Michael; Schutt, Stefan; Miloch, Wojciech Jacek & Melzer, Andre (2018). Layered structures in extended dust clouds under microgravity. Physics of Plasmas.  ISSN 1070-664X.  25(8), s 1- 7 . doi: 10.1063/1.5046049 Fulltekst i vitenarkiv.
• Hoang, Huy Minh; Røed, Ketil; Bekkeng, Tore Andre; Moen, Jøran Idar; Spicher, Andres; Clausen, Lasse Boy Novock; Miloch, Wojciech Jacek; Trondsen, Espen & Pedersen, Arne (2018). A study of data analysis techniques for the multi-needle Langmuir probe. Measurement science and technology.  ISSN 0957-0233.  29(6) . doi: 10.1088/1361-6501/aab948
• Jin, Yaqi; Miloch, Wojciech Jacek; Moen, Jøran Idar & Clausen, Lasse Boy Novock (2018). Solar cycle and seasonal variations of the GPS phase scintillation at high latitudes. Journal of Space Weather and Space Climate.  ISSN 2115-7251.  8 . doi: 10.1051/swsc/2018034 Fulltekst i vitenarkiv.
• Jung, Hendrik; Greiner, Franko; Piel, Alexander K. & Miloch, Wojciech Jacek (2018). Experiments on wake structures behind a microparticle in a magnetized plasma flow. Physics of Plasmas.  ISSN 1070-664X.  25(7), s 1- 10 . doi: 10.1063/1.5040838 Fulltekst i vitenarkiv.
• Madsen, Birgitte; Simon Wedlund, Cyril; Eriksson, A.; Goetz, C.; Karlsson, T.; Gunell, H.; Spicher, Andres; Henri, P; Vallieres, X & Miloch, Wojciech Jacek (2018). Extremely Low-Frequency Waves Inside the Diamagnetic Cavity of Comet 67P/Churyumov-Gerasimenko. Geophysical Research Letters.  ISSN 0094-8276.  45(9), s 3854- 3864 . doi: 10.1029/2017GL076415 Fulltekst i vitenarkiv.
• Miloch, Wojciech Jacek; Jin, Yaqi; Xiong, Chao; Kervalishvili, Guram; Spicher, Andres; Clausen, Lasse Boy Novock & Stolle, Claudia (2018). Ionospheric plasma irregularities studied with Swarm satellites. E3S Web of Conferences.  ISSN 2267-1242.  62, s 1- 6 . doi: 10.1051/e3sconf/20186201009 Fulltekst i vitenarkiv.
• Miloch, Wojciech Jacek; Jung, Hendrik; Darian, Diako; Greiner, Franko; Mortensen, Mikael & Piel, A. (2018). Dynamic ion shadows behind finite-sized objects in collisionless magnetized plasma flows. New Journal of Physics.  ISSN 1367-2630.  20(7), s 1- 6 . doi: 10.1088/1367-2630/aad066 Fulltekst i vitenarkiv.
• Paulsson, Joakim John Paul; Spicher, Andres; Clausen, Lasse Boy Novock; Moen, Jøran Idar & Miloch, Wojciech Jacek (2018). Wake Potential and Wake Effects on the Ionospheric Plasma Density Measurements With Sounding Rockets. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  123(11), s 9711- 9725 . doi: 10.1029/2017JA025004 Fulltekst i vitenarkiv.
• Piel, A.; Greiner, F.; Jung, H & Miloch, Wojciech Jacek (2018). Molecular dynamics simulations of wake structures behind a microparticle in a magnetized ion flow. I. Collisionless limit with cold ion beam. Physics of Plasmas.  ISSN 1070-664X.  25(8), s 1- 10 . doi: 10.1063/1.5039587 Fulltekst i vitenarkiv.
• Darian, Diako; Marholm, Sigvald; Paulsson, Joakim John Paul; Miyake, Y.; Usui, H.; Mortensen, Mikael & Miloch, Wojciech Jacek (2017). Numerical simulations of a sounding rocket in ionospheric plasma: Effects of magnetic field on the wake formation and rocket potential. Journal of Geophysical Research (JGR): Biogeosciences.  ISSN 2169-8953.  122(9), s 9603- 9621 . doi: 10.1002/2017JA024284 Fulltekst i vitenarkiv.
• Eriksson, AI; Engelhardt, IAD; Andre, M; Boström, R; Edberg, NJT; Johansson, F. L.; Odelstad, E; Vigren, E.; Wahlund, JE; Henri, P; Lebreton, JP; Miloch, Wojciech Jacek; Paulsson, Joakim John Paul; Simon Wedlund, Cyril; Yang, Lei; Karlsson, T; Jarvinen, R; Broiles, T.; Mandt, K.; Carr, C. M.; Galand, M; Nilsson, H & Norberg, C (2017). Cold and warm electrons at comet 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics.  ISSN 0004-6361.  605 . doi: 10.1051/0004-6361/201630159
• Hoang, Huy Minh; Røed, Ketil; Bekkeng, Tore Andre; Trondsen, Espen; Clausen, Lasse Boy Novock; Miloch, Wojciech Jacek & Moen, Jøran Idar (2017). High spatial-resolution electron density measurement by Langmuir probe for multi-point observations using tiny spacecraft. Measurement science and technology.  ISSN 0957-0233.  28(11) . doi: 10.1088/1361-6501/aa87e1
• Horký, Miroslav; Miloch, Wojciech Jacek & Delong, Vojtěch Adalbert (2017). Numerical heating of electrons in particle-in-cell simulations of fully magnetized plasmas. Physical review. E.  ISSN 2470-0045.  95 . doi: 10.1103/PhysRevE.95.043302 Fulltekst i vitenarkiv.
• Jin, Yaqi; Moen, Jøran Idar; Oksavik, Kjellmar; Spicher, Andres; Clausen, Lasse Boy Novock & Miloch, Wojciech Jacek (2017). GPS scintillations associated with cusp dynamics and polar cap patches. Journal of Space Weather and Space Climate.  ISSN 2115-7251.  7 . doi: 10.1051/swsc/2017022 Fulltekst i vitenarkiv. Vis sammendrag

  This paper investigates the relative scintillation level associated with cusp dynamics (including precipitation, flow shears, etc.) with and without the formation of polar cap patches around the cusp inflow region by the EISCAT Svalbard radar (ESR) and two GPS scintillation receivers. A series of polar cap patches were observed by the ESR between 8:40 and 10:20 UT on December 3, 2011. The polar cap patches combined with the auroral dynamics were associated with a significantly higher GPS phase scintillation level (up to 0.6 rad) than those observed for the other two alternatives, i.e., cusp dynamics without polar cap patches, and polar cap patches without cusp aurora. The cusp auroral dynamics without plasma patches were indeed related to GPS phase scintillations at a moderate level (up to 0.3 rad). The polar cap patches away from the active cusp were associated with sporadic and moderate GPS phase scintillations (up to 0.2 rad). The main conclusion is that the worst global navigation satellite system space weather events on the dayside occur when polar cap patches enter the polar cap and are subject to particle precipitation and flow shears, which is analogous to the nightside when polar cap patches exit the polar cap and enter the auroral oval.

• Johansson, Fredrik; Odelstad, E; Paulsson, Joakim John Paul; Harang, Sigve Smedsrud; Eriksson, AI; Mannel, Thurid; Vigren, E.; Edberg, NJT; Miloch, Wojciech Jacek; Simon Wedlund, Cyril; Thiemann, E; Eparvier, Francis G. & Anderson, L (2017). Rosetta photoelectron emission and solar ultraviolet flux at comet 67P. Monthly notices of the Royal Astronomical Society.  ISSN 0035-8711.  469, s S626- S635 . doi: 10.1093/mnras/stx2369
• Miloch, Wojciech Jacek; Darian, Diako & Mortensen, Mikael (2017). Wake potential of a dust particle in magnetised plasmas. Physica Scripta.  ISSN 0031-8949.  92(11) . doi: 10.1088/1402-4896/aa90a5 Fulltekst i vitenarkiv.
• Simon Wedlund, Cyril; Alho, M.; Gronoff, G.; Kallio, E.; Gunell, H.; Nilsson, H.; Lindkvist, J.; Behar, E.; Stenberg Wieser, G. & Miloch, Wojciech Jacek (2017). Hybrid modelling of cometary plasma environments: I. Impact of photoionisation, charge exchange, and electron ionisation on bow shock and cometopause at 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics.  ISSN 0004-6361.  604 . doi: 10.1051/0004-6361/201730514
• Spicher, Andres; Clausen, Lasse Boy Novock; Miloch, Wojciech Jacek; Lofstad, Victoria; Jin, Yaqi & Moen, Jøran Idar (2017). Interhemispheric study of polar cap patch occurrence based on Swarm in situ data. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380. . doi: 10.1002/2016JA023750 Fulltekst i vitenarkiv.
• Jin, Yaqi; Moen, Jøran Idar; Miloch, Wojciech Jacek; Clausen, Lasse Boy Novock & Oksavik, Kjellmar (2016). Statistical study of the GNSS phase scintillation associated with two types of auroral blobs. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  121(5), s 4679- 4697 . doi: 10.1002/2016JA022613
• Spicher, Andres; Ilyashov, Askar A.; Miloch, Wojciech Jacek; Chernyshov, Aleksander A.; Clausen, Lasse Boy Novock; Moen, Jøran Idar; Abe, T. & Saito, Y. (2016). Reverse flow events and small-scale effects in the cusp ionosphere. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  121(10), s 10,466- 10,480 . doi: 10.1002/2016JA022999
• Yang, Lei; Paulsson, Joakim John Paul; Simon Wedlund, Cyril; Odelstad, Elias; Edberg, Niklas; Koenders, C.; Eriksson, Anders & Miloch, Wojciech Jacek (2016). Observations of high-plasma density region in the inner coma of 67P/Churyumov–Gerasimenko during early activity. Monthly notices of the Royal Astronomical Society.  ISSN 0035-8711.  462, s S33- S44 . doi: 10.1093/mnras/stw2046
• Block, Dietmar & Miloch, Wojciech Jacek (2015). Charging of multiple grains in subsonic and supersonic plasma flows. Plasma Physics and Controlled Fusion.  ISSN 0741-3335.  57(1), s 1- 8 . doi: 10.1088/0741-3335/57/1/014019
• Horky, M. & Miloch, Wojciech Jacek (2015). Kinetic plasma instabilities due to charge exchange and elastic collisions. Journal of Physics: Conference Series.  ISSN 1742-6588.  591(1) . doi: 10.1088/1742-6596/591/1/012034
• Horky, Miroslav & Miloch, Wojciech Jacek (2015). Numerical study on the stability of weakly collisional plasma in ExB fields. Physics of Plasmas.  ISSN 1070-664X.  22(2) . doi: 10.1063/1.4906887
• Jin, Yaqi; Moen, Jøran Idar & Miloch, Wojciech Jacek (2015). On the collocation of the cusp aurora and the GPS phase scintillation: a statistical study. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  120(10), s 9176- 9191 . doi: 10.1002/2015JA021449
• Miloch, Wojciech Jacek (2015). Simulations of several finite-sized objects in plasma. Procedia Computer Science.  ISSN 1877-0509.  51, s 1282- 1291 . doi: 10.1016/j.procs.2015.05.313
• Spicher, Andres; Miloch, Wojciech Jacek; Clausen, Lasse Boy Novock & Moen, Jøran Idar (2015). Plasma turbulence and coherent structures in the polar cap observed by the ICI-2 sounding rocket. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  120(12), s 10959- 10978 . doi: 10.1002/2015JA021634
• Yaroshenko, V.; Miloch, Wojciech Jacek & Lühr, H. (2015). Particle-in-cell simulation of spacecraft/plasma interactions in the vicinity of Enceladus. Icarus (New York, N.Y. 1962).  ISSN 0019-1035.  257, s 1- 8 . doi: 10.1016/j.icarus.2015.04.028
• Jin, Yaqi; Moen, Jøran Idar & Miloch, Wojciech Jacek (2014). GPS scintillation effects associated with polar cap patches and substorm auroral activity: direct comparison. Journal of Space Weather and Space Climate.  ISSN 2115-7251.  4 . doi: 10.1051/swsc/2014019
• Miloch, Wojciech Jacek (2014). Numerical simulations of dust charging and wakefield effects. Journal of Plasma Physics.  ISSN 0022-3778.  80, s 795- 801 . doi: 10.1017/S0022377814000300
• Spicher, Andres; Miloch, Wojciech Jacek & Moen, Jøran Idar (2014). Direct evidence of double-slope power spectra in the high-latitude ionospheric plasma. Geophysical Research Letters.  ISSN 0094-8276.  41(5), s 1406- 1412 . doi: 10.1002/2014GL059214
• Yaroshenko, Victoria V.; Lühr, Hermann & Miloch, Wojciech Jacek (2014). Dust charging in the Enceladus torus. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  119, s 221- 236 . doi: 10.1002/2013JA019213
• Fredriksen, Åshild; Miloch, Wojciech Jacek; Gulbrandsen, Njål & Mishra, Lekha Nath (2013). On the Use of a Retarding Field Energy Analyzer for Plasma Flow Analysis. Contributions to Plasma Physics.  ISSN 0863-1042.  53(1), s 86- 91 . doi: 10.1002/ctpp.201310015
• Gulbrandsen, Njål; Miloch, Wojciech Jacek & Fredriksen, Åshild (2013). Interpretation of Ion Velocity Distributions Measured with a Grounded Retarding Field Energy Analyzer (RFEA) in an Inductively Coupled Helicon Plasma. Contributions to Plasma Physics.  ISSN 0863-1042.  53(1), s 27- 32 . doi: 10.1002/ctpp.201310005
• Miloch, Wojciech Jacek; Pecseli, Hans & Trulsen, Jan Karsten (2013). Unstable ring-shaped ion distribution functions induced by charge–exchange collisions. Plasma Physics and Controlled Fusion.  ISSN 0741-3335.  55(12) . doi: 10.1088/0741-3335/55/12/124006
• Miloch, Wojciech Jacek; Vladimirov, Sergei V. & Yaroshenko, V.V. (2013). Complex wakes behind objects in multispecies plasmas. Europhysics letters.  ISSN 0295-5075.  101(1) . doi: 10.1209/0295-5075/101/15001
• Block, D.; Carstensen, J.; Ludwig, P.; Miloch, Wojciech Jacek; Greiner, F.; Piel, A.; Bonitz, M. & Melzer, A. (2012). Wake Formation and Wake Field Effects in Complex Plasmas. Contributions to Plasma Physics.  ISSN 0863-1042.  52(10), s 804- 812 . doi: 10.1002/ctpp.201200030
• Carstensen, Jan; Greiner, Franko; Block, Dietmar; Schablinski, Jan; Miloch, Wojciech Jacek & Piel, Aleksander (2012). Charging and coupling of a vertically aligned particle pair in the plasma sheath. Physics of Plasmas.  ISSN 1070-664X.  19(3) . doi: 10.1063/1.3689854
• Ludwig, Patrick; Miloch, Wojciech Jacek; Kählert, Hanno & Bonitz, Michael (2012). On the wake structure in streaming complex plasmas. New Journal of Physics.  ISSN 1367-2630.  14 . doi: 10.1088/1367-2630/14/5/053016 Fulltekst i vitenarkiv.
• Miloch, Wojciech Jacek & Block, Dietmar (2012). Dust grain charging in a wake of other grains. Physics of Plasmas.  ISSN 1070-664X.  19(12) . doi: 10.1063/1.4771685
• Miloch, Wojciech Jacek; Habbal, S. Rifai & Esser, Ruth (2012). Plasma dynamics at the prominence-corona interface. Astrophysical Journal.  ISSN 0004-637X.  752(2) . doi: 10.1088/0004-637X/752/2/85
• Miloch, Wojciech Jacek; Yaroshenko, V.; Vladimirov, Sergei V.; Pecseli, Hans & Trulsen, Jan Karsten (2012). Spacecraft charging in flowing plasmas; numerical simulations. Journal of Physics: Conference Series.  ISSN 1742-6588.  370 . doi: 10.1088/1742-6596/370/1/012004
• Yaroshenko, V.V.; Miloch, Wojciech Jacek; Thomas, H.M. & Morfill, G. E. (2012). Cassini capturing of freshly-produced water-group ions in the Enceladus torus. Geophysical Research Letters.  ISSN 0094-8276.  39 . doi: 10.1029/2012GL053173
• Miloch, Wojciech Jacek & Block, Dietmar (2011). Charging and Potential in Finite Clusters of Dust Grains. AIP Conference Proceedings.  ISSN 0094-243X.  1397, s 104- 109 . doi: 10.1063/1.3659748
• Miloch, Wojciech Jacek; Gulbrandsen, Njål; Mishra, Lekha Nath & Fredriksen, Åshild (2011). Ion velocity distributions in the sheath and presheath of a biased object in plasma. Physics of Plasmas.  ISSN 1070-664X.  18(8) . doi: 10.1063/1.3614520
• Yaroshenko, V.; Miloch, Wojciech Jacek; Vladimirov, Sergei V. & Morfill, Gregor E. (2011). Cassini's Charging and Ion Wake Formation in Saturn's Magnetosphere. AIP Conference Proceedings.  ISSN 0094-243X.  1397, s 449- 450 Vis sammendrag

  Spacecraft‐plasma interactions are studied in the regime relevant for Cassini during the Saturn orbit insertion (SOI) flyby. Three‐dimensional particle‐in‐cell self‐consistent code has been employed to calculate the spacecraft (SC) potential and its spatial structure in a complicated plasma environment of Saturn's magnetosphere for a wide range of distances

• Yaroshenko, V.; Miloch, Wojciech Jacek; Vladimirov, Sergei V.; Thomas, H.M & Morfill, Gregor E. (2011). Modeling of Cassini's charging at Saturn orbit insertion flyby. Journal of Geophysical Research (JGR): Space Physics.  ISSN 2169-9380.  116 . doi: 10.1029/2011JA016775
• Fredriksen, Åshild; Mishra, Lekha Nath; Gulbrandsen, Njål & Miloch, Wojciech Jacek (2010). On the measurement of subsonic flow in a capacitevly coupled helicon plasma source. Journal of Physics: Conference Series.  ISSN 1742-6588.  257 . doi: 10.1088/1742-6596/257/1/012019 Fulltekst i vitenarkiv. Vis sammendrag

  Plasma parameters and the subsonic flow from a capacitively coupled, cylindrical plasma source of the Njord helicon device are investigated by means of a Mach probe and a retarding field energy analyzer (RFEA). 13.56 MHz and 600 W RF power is inserted into the argon working gas under low-pressure conditions and moderate magnetic field. By means of a downstream field coil, the magnetic field is shaped from a purely expanding field to a configuration with more parallel field lines. It is shown that the downstream plasma density along the outer rim of the source increases significantly and there is a sudden increase by nearly 20 V in the plasma potential already after a moderate increase in the downstream magnetic field. The investigation of the flow indicates that current ratios derived from the Mach probe result in an apparent flow in the direction towards the source, while the current bratios derived from the RFEA indicate a flow in the direction away from the source. PIC simulations demonstrate that the acceptance angle of the probes, being nearly 180o for the Mach probe, and about 45o for the RFEA, can critically affect the current ratios and hence the subsonic flow measured by the probes in the weakly magnetized plasma in our device. The first section in your paper

Se alle arbeider i Cristin

• Kotova, Daria; Jin, Yaqi & Miloch, Wojciech Jacek (2019). Comparison of ionospheric plasma irregularities measured by Swarm with the ground-based GPS scintillation data. Vis sammendrag

  Ionospheric irregularities are often the cause of GNSS precise positioning errors, as well as disruption of radio communications in the HF range. The reason for the occurrence of these irregularities can be various non-stationary processes in the near-Earth space plasma that depend on the response of the ionosphere to the variations in the near Earth space. Therefore, the study of ionospheric irregularities is an urgent scientific and applied problem. In this study we use a global product based on the Swarm satellite measurements that characterizes ionospheric irregularities and fluctuations. The IPIR (Ionospheric Plasma IRregularities product) provides characteristics of plasma density structures in the ionosphere, of plasma irregularities in terms of their amplitudes, gradients and spatial scales and assigns them to geomagnetic regions and consequently to predominant plasma processes. It also provides indication, in the form of a numerical value index, on their severity for the integrity of trans-ionospheric radio signals and hence the accuracy of GNSS precise positioning. In this work we made validations of the IPIR product against the ground-based measurements, focusing on GPS TEC and scintillation data in low latitudes regions.

• Miloch, Wojciech Jacek (2019). A physicist in Antarctica.
• Miloch, Wojciech Jacek (2019). Fizyk patrzy na zorze (A physicist observes aurora).
• Miloch, Wojciech Jacek (2019). Ionospheric and Space Weather Research at Troll.
• Miloch, Wojciech Jacek (2019). Lowcy zorz (Hunters of the Northern Lights).
• Miloch, Wojciech Jacek (2019). På jak etter sørlyset, sesong 2, epsiode 2.
• Skjæveland, Arnlaug Høgås; Kotova, Daria & Miloch, Wojciech Jacek (2019). Investigation of GPS phase scintillations at Troll station during geomagnetic disturbances in 2018. Vis sammendrag

  Ionospheric phenomena as a response to geomagnetic activity can be different at both hemispheres, in particular at high latitudes, due to the structure of the ionosphere, orientation of the interplanetary magnetic field and structure of the Earth magnetic field. This may have implications on large scale modeling and space weather forecasting. To understand these aspects, a significant number of studies which include both hemispheres are required. In order to study the asymmetry between the northern and southern hemispheres at high latitudes, we employ the GNSS TEC and scintillation monitors. We use data from a GNSS receiver at Troll station in Antarctica together with corresponding datasets from the northern hemisphere. We carry out detailed study of several representative events for different geomagnetic conditions. We characterize the GPS phase scintillations in the context of interhemispheric asymmetries, and also using other supportive ground based and satellite observations. This is the first study with data from the recently established ionospheric observatory at Troll station in Antarctica. It also forms a ground for more statistical study of interhemispheric asymmetries, where the first results are also shown.

• Spicher, Andres; Moen, Jøran Idar; Clausen, Lasse Boy Novock & Miloch, Wojciech Jacek (2019). On the source and nature of ionospheric plasma irregularities: advances made through the Investigation of Cusp irregularities sounding rocket program.
• Jin, Yaqi; Miloch, Wojciech Jacek; Clausen, Lasse Boy Novock; Spicher, Andres; Stolle, Claudia; Kervalishvili, G. & Xiong, Chao (2018). Ionospheric Plasma Irregularities Characterized by the Swarm satellites.
• Jin, Yaqi; Spicher, Andres; Xiong, Chao; Clausen, Lasse Boy Novock; Stolle, Claudia; Kervalishvili, G. & Miloch, Wojciech Jacek (2018). Detecting high-latitude ionospheric plasma irregularities by Swarm satellites.
• Miloch, Wojciech Jacek (2018). På jak etter sørlyset, sesong 2.
• Spicher, Andres; Clausen, Lasse Boy Novock; Miloch, Wojciech Jacek; Jin, Yaqi; Lofstad, Victoria Emilie & Moen, Jøran Idar (2018). Polar cap patch climatology based on Swarm density data.
• Spicher, Andres; Moen, Jøran Idar; Clausen, Lasse Boy Novock; Miloch, Wojciech Jacek & Blix, Kolbjørn (2018). 4DSpace long term plans towards a multi-satellite M-Class mission.
• Spicher, Andres; Moen, Jøran Idar; Hoang, Huy Minh; Røed, Ketil; Trondsen, Espen; Miloch, Wojciech Jacek & Blix, Kolbjørn (2018). The Investigation of Cusp irregularities 5 sounding rocket: multi-point measurement of turbulence.
• Miloch, Wojciech Jacek & Forseth, Natalie (2016). Characterisation of plasma parameters at comet 67P/Churyumov-Gerasimenko.
• Miloch, Wojciech Jacek; Yang, Lei; Paulsson, Joakim John Paul; Simon Wedlund, Cyril; Odelstad, Elias; Edberg, Niklas; Koenders, C. & Eriksson, A. (2016). Early Evolution of Comet 67P Studied with the RPC-LAP onboard Rosetta.
• Eriksson, Anders; Edberg, Niklas; Odelstad, Elias; Wahlund, JE; Virgen, Erik; Karlson, Tomas; Lindqvist, P-A.; Jarvinen, Riku; Lybekk, Bjørn; Miloch, Wojciech Jacek; Pedersen, Arne; Lebreton, Jean-Pierre; Henri, Pierre; Chris, Carr & Cupido, E (2015). The Rosetta Langmuir Probe Instrument.
• Jin, Yaqi; Moen, Jøran Idar & Miloch, Wojciech Jacek (2015). On the collocation of the cusp aurora and the GPS phase scintillation: A statistical study.
• Spicher, Andres; Miloch, Wojciech Jacek; Moen, Jøran Idar & Clausen, Lasse Boy Novock (2015). Small-scale plasma turbulence and intermittency in the high latitude F region based on the ICI-2 sounding rocket experiment.
• Block, Dietmar & Miloch, Wojciech Jacek (2013). Particles in the wake of other particles.
• Fredriksen, Åshild; Gulbrandsen, Njål & Miloch, Wojciech Jacek (2013). Potential and ion flow profiles in a Helicon-source plasma.
• Miloch, Wojciech Jacek (2013). Finite-sized objects in laboratory and space plasmas.
• Miloch, Wojciech Jacek (2013). The Role of Wake Effects in Experiments by Sounding Rockets.
• Miloch, Wojciech Jacek; Pecseli, Hans & Trulsen, Jan Karsten (2013). Kinetic plasma instabilities due to charge exchange collisions.
• Miloch, Wojciech Jacek; Pecseli, Hans & Trulsen, Jan Karsten (2013). Numerical simulations of kinetic plasma instabilities induced by charge exchange collisions.
• Pecseli, Hans; Miloch, Wojciech Jacek & Trulsen, Jan Karsten (2013). Kinetically unstable velocity distributions formed by charge exchange collisions with drifting ions.
• Spicher, Andres; Miloch, Wojciech Jacek & Moen, Jøran Idar (2013). Power Spectral Analysis of High Lattitude F-region Small-Scale Irregularities.
• Fredriksen, Åshild; Gulbrandsen, Njål & Miloch, Wojciech Jacek (2012). Plasma flows in expanding magnetic field.
• Fredriksen, Åshild; Gulbrandsen, Njål; Miloch, Wojciech Jacek; Hansen, Alexander & Scime, Earl (2012). Plasma flows in expanding magnetic field: simulations, probe and Laser Induced Fluorescence (LIF) measurements.
• Miloch, Wojciech Jacek; Pecseli, Hans & Trulsen, Jan Karsten (2012). Numerical simulations of collisional partially ionized plasmas. Vis sammendrag

  The stability of plasma can be related to the shape of its velocity distributions [1]. For instance, for ionospheric plasmas it is argued that ion velocity distributions can deviate from Maxwellian giving rise to plasma instabilities [2, 3]. In order to study the possibility for losscone instabilities in collisional plasmas with Hall currents, we have modified our particle-in-cell code to include collisional effects in a magentized plasma. We have the option of adding a DCelectric field in the direction perpendicular to the magnetic field. We present the results from the self-consistent three dimensional simulations of the plasma velocity distributions under such conditions. In this study we investigate the role of collisions with the neutral component for the evolution and stability of the velocity distributions. In the most general case, we include elastic electron-neutral collisions, as well as charge exchange and elastic ion-neutral collisions. The results will be important for a detailed understanding of low frequency ionospheric plasmas, for instance in the E-region. References [1] O. Penrose, Phys. Fluids 3, 258 (1960). [2] J.-P. St.-Maurice, E. Winkler, and A. M. Hamza, J. Geophys. Res. 99, 19527 (1994) [3] J.-P. St.-Maurice and R. W. Schunk, Planet. Space Sci. 25, 243 (1977

• Block, Dietmar; Miloch, Wojciech Jacek; Schablinski, J, & Kroll, Mattes (2011). Wake fields and their influence on grain charge.
• Fredriksen, Åshild; Miloch, Wojciech Jacek; Gulbrandsen, Njål & Mishra, Lekha Nath (2011). On the use of a retarding field energy analyzer for plasma flow analysis.
• Fredriksen, Åshild; Miloch, Wojciech Jacek; Gulbrandsen, Njål & Mishra, Lekha Nath (2011). The role of sheath and acceptance angle in front of a retarding field energy analyzer for plasma flow analysis.
• Gulbrandsen, Njål; Miloch, Wojciech Jacek & Fredriksen, Åshild (2011). Interpretation of ion velocity distributions measured with a retartding field energy analyzer (RFEA) in a inducitively coupled helicon plasma.
• Ludwig, Patrick; Bonitz, M.; Kahlert, H; Dufty, J. W. & Miloch, Wojciech Jacek (2011). Dynamical Screening Approach to Strongly Correlated Multi-Component Plasmas.
• Ludwig, Patrick; Kahlert, H; Bonitz, M. & Miloch, Wojciech Jacek (2011). Dust Dynamics Simulations with the Consideration of Wake Effects.
• Ludwig, Patrick; Kahlert, H; Dufty, J. W. & Miloch, Wojciech Jacek (2011). Dynamical Screening and Wake Effects in Streaming Plasmas.
• Miloch, Wojciech Jacek (2011). Spacecrafts, asteroids, and dust grains in plasma: what do they have in common?.
• Miloch, Wojciech Jacek & Block, Dietmar (2011). Charging and potential in finite clusters of dust grains.
• Miloch, Wojciech Jacek; Yaroshenko, V.; Vladimirov, Sergei V.; Pecseli, Hans & Trulsen, Jan Karsten (2011). Spacecraft charging in space and ionospheric plasma; numerical simulations.
• Olson, Jonas; Brenning, N.; Ratynskaya, S.; Miloch, Wojciech Jacek & Yaroshenko, V. (2011). Studies of the sheath and wake of the Cassini spacecraft with implications to Langmuir probe measurements.
• Yaroshenko, V.; Miloch, Wojciech Jacek; Vladimirov, Sergei V. & Morfill, Gregor E. (2011). Cassini charging at Saturn insertion orbit.
• Yaroshenko, V.; Miloch, Wojciech Jacek; Vladimirov, Sergei V. & Morfill, Gregor E. (2011). Spacecraft charging and ion wake formation in Saturn’s magnetosphere.
• Fredriksen, Åshild; Mishra, Lekha Nath; Gulbrandsen, Njål & Miloch, Wojciech Jacek (2010). Magnetic field geometry, beams and flows in the inductively coupled helicon plasma Njord.
• Miloch, Wojciech Jacek (2010). Complex Plasmas.

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