Zobrazeno 1 - 10 of 38 pro vyhledávání: '"Karen Gillespie"'
1
Numerical simulations of unbounded cyclotron-maser emissions
Autor: Alan D. R. Phelps, Sandra McConville, Karen Gillespie, David Speirs, Kevin Ronald
Publikováno v: Journal of Plasma Physics. 79:999-1001
Numerical simulations have been conducted to study the spatial growth rate and emission topology of the cyclotron-maser instability responsible for stellar/planetary auroral magnetospheric radio emission and intense non-thermal radio emission in othe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9994a3aa947d41fd89ee228c5794a3e
https://doi.org/10.1017/s0022377813001141
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3
Laboratory and numerical investigation of mechanisms for magnetospheric cyclotron emissions
Autor: Alan D. R. Phelps, Karen Gillespie, Craig Robertson, Robert Bingham, Adrian W. Cross, M. King, R. A. Cairns, M. E. Koepke, Kevin Ronald, K. Matheson, I. Vorgul, Sandra McConville, B. C. Speirs, Colin G. Whyte, Barry Kellett
Publikováno v: 2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS).
Cyclotron coupling between electrons and waves is thought to occur in both polar and equatorial regions of the Earth's magnetosphere. The cyclotron emissions from an electron beam moving into a waveguide with an increasing magnetic field have been in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67d9174a1a93d5f7498cd690891696e3
https://doi.org/10.1109/ursigass.2014.6929898
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4
Progress towards numerical and experimental simulations of fusion relevant beam instabilities
Autor: M. King, Karen Gillespie, R. Bryson, David Speirs, Adrian W. Cross, Raoul Trines, I. Vorgul, Robert Bingham, R. A. Cairns, Alan D. R. Phelps, Kevin Ronald, Sandra McConville
In certain plasmas, non-thermal electron distributions can produce instabilities. These instabilities may be useful or potentially disruptive. Therefore the study of these instabilities is of importance in a variety of fields including fusion science
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68d7c105efc223f6e88b900b16b88410
https://hdl.handle.net/10023/5186
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6
3D PiC code investigations of Auroral Kilometric Radiation mechanisms
Autor: B. J. Kellett, Alan D. R. Phelps, Robert Bingham, Craig Robertson, Karen Gillespie, Adrian W. Cross, David Speirs, Sandra McConville, R. A. Cairns, Kevin Ronald, Colin G. Whyte, Wenlong He, I. Vorgul
Efficient (similar to 1%) electron cyclotron radio emissions are known to originate in the X mode from regions of locally depleted plasma in the Earths polar magnetosphere. These emissions are commonly referred to as the Auroral Kilometric Radiation
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b55d57fa464c04bb2bfdc320489b663c
https://hdl.handle.net/10023/5184
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7
Numerical simulation of unconstrained cyclotron resonant maser emission
Autor: Robert Bingham, R. A. Cairns, Karen Gillespie, Adrian W. Cross, Kevin Ronald, I. Vorgul, David Speirs, Alan D. R. Phelps, B. J. Kellett, Sandra McConville
When a mainly rectilinear electron beam is subject to significant magnetic compression, conservation of magnetic moment results in the formation of a horseshoe shaped velocity distribution. It has been shown that such a distribution is unstable to cy
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8fb454b7e8cdf087b5b0b2da13a987a
https://strathprints.strath.ac.uk/50256/2/Speirs_etal_JOP_CS_2014_numerical_simulation_unconstrained_cyclotron.pdf
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8
Numerical simulation of astrophysical cyclotron-maser emission
Autor: Adrian W. Cross, David Speirs, Karen Gillespie, Alan D. R. Phelps, Kevin Ronald, Sandra McConville
Publikováno v: 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
Numerical simulations have been conducted at the University of Strathclyde to study the spatial growth rate and emission topology of the cyclotron maser instability responsible for auroral magnetospheric radio emission from stars and planets and inte
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18d366cb7b2d3533731dee84b49a3320
https://doi.org/10.1109/irmmw-thz.2013.6665679
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9
Propagation and escape of astrophysical cyclotron-maser radiation
Autor: Robert Bingham, Kevin Ronald, Karen Gillespie, Barry Kellett, Alan D. R. Phelps, R.A. Cairns, I. Vorgul, David Speirs, Craig Robertson, Adrian W. Cross, Sandra McConville
Publikováno v: 2013 19th IEEE Pulsed Power Conference (PPC).
A multitude of astrophysical plasma environments exist where a combination of particle acceleration, convergent magnetic fields and a sufficiently large ratio of electron cyclotron frequency to plasma frequency are present to support electron cyclotr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::592996c8aaf8875d760e495fa4e9e54d
https://doi.org/10.1109/ppc.2013.6627711
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10
Scaled laboratory experiments to investigate the moderation of auroral cyclotron emissions by background plasma
Autor: Kevin Ronald, Mark Koepke, Sandra McConville, Karen Gillespie, M. King, Colin G. Whyte, Douglas C. Speirs
Publikováno v: 2012 37th International Conference on Infrared, Millimeter, and Terahertz Waves.
Laboratory experiments and numerical simulations are reported that study cyclotron emission processes and the radiation inhibition by background plasma.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::370ceb9faf2e7ca7406c2fb5d8b88717
https://doi.org/10.1109/irmmw-thz.2012.6380375
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