| 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 |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
2013 19th IEEE Pulsed Power Conference (PPC). |
| DOI: |
10.1109/ppc.2013.6627711 |
| Popis: |
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 cyclotron-maser emission [1-6]. The resultant radiation signatures typically comprise of well-defined spectral components (around the relativistic electron cyclotron frequency) with near 100% left or right handed circular polarization when viewed out-with the source region. Although the generation mechanism has been well documented [7-25], there are numerous potential hindrances to the propagation and escape of the radiation from the source region, including issues of geometry/mode conversion [26] and coupling onto the dispersion branch connecting with vacuum propagation [12]. In the current context we consider the results of numerical Particle-in-cell (PiC) simulations conducted at the University of Strathclyde to study the spatial growth rate and emission topology of the cyclotron-maser emission process. The results have significant bearing on the radiation propagation characteristics and highly debated question of propagation/escape, with particular relevance to the planetary/stellar auroral magnetospheric case. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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