Results 21 to 30 of about 435,129 (349)

Multi-frequency HF radar measurements of artificial F-region field-aligned irregularities [PDF]

, 2004
International audienceWe present radar backscatter power measurements using the CUTLASS HF radar at Hankasalmi, Finland from F-region field-aligned irregularities induced by HF radio pumping with the EISCAT Heating facility.
A. Senior, Rietveld, Michael T., Kosch, M.J., Borisov, N. D., Honary, F., Rietveld, M. T., Senior, A., T. K. Yeoman, Borisov, N.D., M. T. Rietveld, Kosch, M. J., M. J. Kosch, F. Honary, Yeoman, T. K., N. D. Borisov, Yeoman, T.K.   +15 more
core   +1 more source

Scattering of radio frequency waves by randomly modulated density interfaces in the edge of fusion plasmas [PDF]

, 2021
Submitted for publication in Journal of Plasma PhysicsIn the scrape-off layer and the edge region of a tokamak, the plasma is strongly turbulent and scatters the radio frequency (RF) electromagnetic waves that propagate through this region.
Papadopoulos, A.D., Glytus, E.N., Ram, Abhay K., Hizanidi, K.   +3 more
core   +1 more source

ICRF plasma production at hydrogen minority regime in LHD

Nuclear Fusion, 2023
This study aim is to develop further an ion cyclotron range of frequencies (ICRF) method of plasma production in stellarators based on the minority heating.
Yu.V. Kovtun, H. Kasahara, V.E. Moiseenko, S. Kamio, T. Seki, K. Saito, R. Seki, A. Dinklage, D. Hartmann, H. Laqua, T. Stange, S. Lazerson, A. Alonso, T. Wauters, Ye. Kazakov, J. Ongena, I.E. Garkusha   +16 more
doaj   +1 more source

Laboratory astrophysics : investigation of planetary and astrophysical maser emission [PDF]

, 2013
This paper describes a model for cyclotron maser emission applicable to planetary auroral radio emission, the stars UV Ceti and CU Virginus, blazar jets and astrophysical shocks.
Ronald K, Phelps, A.D.R., Phelps, Alan, Kellett BJ, McConville SL, Phelps ADR, Speirs DC, Ronald, Kevin, McConville, S.L., Cross, Adrian, Cairns RA, Speirs, D.C., Cairns, R Alan, Cross, A.W., Cross AW, Kellett, Barry, McConville, Sandra, Cairns, R.A., Bingham, Robert, Vorgul I, Vorgul, Irena, Kellett, B.J., Ronald, K., Bingham R, Spiers DC, Vorgul, I., Speirs, David, Bingham, R.   +27 more
core   +1 more source

Analysis of Radio Frequency Blackout for a Blunt-Body Capsule in Atmospheric Reentry Missions

Aerospace, 2016
A numerical analysis of electromagnetic waves around the atmospheric reentry demonstrator (ARD) of the European Space Agency (ESA) in an atmospheric reentry mission was conducted.
Yusuke Takahashi, Reo Nakasato, Nobuyuki Oshima   +2 more
doaj   +1 more source

Influence of a Helium–Nitrogen RF Plasma Jet on Onion Seed Germination

Applied Sciences, 2020
This paper presents an experiment using a radio frequency atmospheric pressure plasma jet to generate cold plasma for pre-sowing stimulation of Wolska onion seeds. Impact of the He + N2 afterglow plasma on germination was investigated.
Agnieszka Starek-Wójcicka, Agnieszka Sagan, Piotr Terebun, Michał Kwiatkowski, Piotr Kiczorowski, Joanna Pawlat   +5 more
doaj   +1 more source

Plasma stratification in radio-frequency discharges in argon gas [PDF]

Journal of Physics D: Applied Physics, 2020
We conducted experimental studies and computer simulations of standing striations in capacitive coupled plasma in agas. Standing striations were observed at frequencies 3.6, 8.4 and 19.0 MHz, in a pressure range 0.05–10 Torr, tube radius R = 1.1 cm, for ...
V. Kolobov, R. Arslanbekov, D. Levko, V. Godyak   +3 more
semanticscholar   +1 more source

On the character and distribution of lower-frequency radio emissions at Saturn and their relationship to substorm-like events [PDF]

, 2009
With the arrival of the Cassini spacecraft at Saturn in July 2004, there have been quasi-continuous observations of Saturn kilometric radiation (SKR) emissions.
L. Lamy, M. P. Freeman, S. W. H. Cowley, Lamy, L., Cecconi, Baptiste, B. Cecconi, W. S. Kurth, Jackman, C.M., Freeman, M. P., Kurth, W.S., Zarka, P., C. M. Jackman, M. K. Dougherty, Lamy, Laurent, Freeman, M.P., P. Zarka, Jackman, Caitriona M., Cowley, S.W.H., Cecconi, B., Kurth, William S., Dougherty, M.K., Cowley, S. W. H., Dougherty, Michele K., Freeman, Mervyn P., Zarka, Philippe   +24 more
core   +1 more source

Transmission coefficient estimation based on antenna voltage standing wave ratio under plasma sheath

AIP Advances, 2018
Radio blackout has confused the aerospace industry for decades. The highly attenuated caused by the plasma sheath is the main cause of radio blackout. The transmission coefficient depends on the relationship between plasma density, collision frequency ...
Min Yang, Xiaoping Li, Bowen Bai, Ze Li, Bosheng Xue   +4 more
doaj   +1 more source

An interferometer experiment to explore the aspect angle dependence of stimulated electromagnetic emission spectra [PDF]

, 2005
International audienceWhen the Earth's ionosphere is irradiated by a radiofrequency (RF) electromagnetic wave of sufficiently high power density and tuned to match a natural E- or F-region plasma frequency, ionospheric magnetoionic wave modes may be ...
Khudukon, B. Z., Rietveld, Michael T., Yurik, R.Yu, Brekke, A., Belyey, Tereshchenko, Tereshchenko, E., Khudukon, B., Rietveld, M., Hoz, C. La, Belyey, Vasyl, Tereshchenko, E.D., Hagfors, Yurik, R. Yu., Khudukon, Yu. Yurik, Heinselman, C., Grill, Brekke, Belyey, V., Isham, B., Rietveld, Hagfors, T., Heinselman, Brekke, Asgeir, Rietveld, M. T., La Hoz, C., Isham, null La Hoz, Grill, M., Yurik, Yu., null null, Yurik, R. Yu., Yurik, R., La Hoz, Cesar, Tereshchenko, E. D., La Hoz   +36 more
core   +1 more source