Laboratory experiment to investigate the impact of background plasma on cyclotron emission
The auroral density cavity (a region of partial plasma depletion situated at an altitude of around 3200km at the Earth's pole) has been studied to have a background plasma density ~10 6 m -3 , and plasma frequency ~9kHz. Auroral Kilometric Radiation (AKR) is produced when particles descend thro...
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Published in | 2012 Abstracts IEEE International Conference on Plasma Science p. 2P-71 |
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Main Authors | , , , , , , , , , , , , , , |
Format | Conference Proceeding |
Language | English |
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IEEE
01.07.2012
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Abstract | The auroral density cavity (a region of partial plasma depletion situated at an altitude of around 3200km at the Earth's pole) has been studied to have a background plasma density ~10 6 m -3 , and plasma frequency ~9kHz. Auroral Kilometric Radiation (AKR) is produced when particles descend through this region and are magnetically compressed as they approach the Earth's magnetosphere and through conservation of the magnetic moment, a horseshoe shaped velocity distribution with a large spread in pitch factor is formed as the particles sacrifice axial for rotational momentum. Satellites have observed that the AKR is emitted and extends down to the local electron cyclotron frequency with peaks in frequency at ~300kHz, powers ~10 9 W and with emission efficiency ~1% of the total precipitated electron kinetic energy. Theory has shown this type of distribution to be unstable to cyclotron emissions in the X-mode [1]. |
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AbstractList | The auroral density cavity (a region of partial plasma depletion situated at an altitude of around 3200km at the Earth's pole) has been studied to have a background plasma density ~10 6 m -3 , and plasma frequency ~9kHz. Auroral Kilometric Radiation (AKR) is produced when particles descend through this region and are magnetically compressed as they approach the Earth's magnetosphere and through conservation of the magnetic moment, a horseshoe shaped velocity distribution with a large spread in pitch factor is formed as the particles sacrifice axial for rotational momentum. Satellites have observed that the AKR is emitted and extends down to the local electron cyclotron frequency with peaks in frequency at ~300kHz, powers ~10 9 W and with emission efficiency ~1% of the total precipitated electron kinetic energy. Theory has shown this type of distribution to be unstable to cyclotron emissions in the X-mode [1]. |
Author | Cairns, R. A. Gillespie, K. M. Whyte, C. G. Speirs, D. C. Robertson, C. W. Phelps, A. D. R. Ronald, K. Vorgul, I. McConville, S. L. Matheson, K. King, M. Kellett, B. J. Bingham, R. Koepke, M. E. Cross, A. W. |
Author_xml | – sequence: 1 givenname: S. L. surname: McConville fullname: McConville, S. L. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 2 givenname: M. surname: King fullname: King, M. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 3 givenname: K. surname: Matheson fullname: Matheson, K. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 4 givenname: C. G. surname: Whyte fullname: Whyte, C. G. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 5 givenname: D. C. surname: Speirs fullname: Speirs, D. C. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 6 givenname: K. M. surname: Gillespie fullname: Gillespie, K. M. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 7 givenname: A. D. R. surname: Phelps fullname: Phelps, A. D. R. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 8 givenname: A. W. surname: Cross fullname: Cross, A. W. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 9 givenname: C. W. surname: Robertson fullname: Robertson, C. W. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 10 givenname: K. surname: Ronald fullname: Ronald, K. organization: Dept. of Phys., Univ. of Strathclyde, Glasgow, UK – sequence: 11 givenname: M. E. surname: Koepke fullname: Koepke, M. E. organization: Dept. of Phys., West Virginia Univ., Morgantown, WV, USA – sequence: 12 givenname: R. A. surname: Cairns fullname: Cairns, R. A. organization: Sch. of Math. & Stat., Univ. of St. Andrews, St. Andrews, UK – sequence: 13 givenname: I. surname: Vorgul fullname: Vorgul, I. organization: Sch. of Math. & Stat., Univ. of St. Andrews, St. Andrews, UK – sequence: 14 givenname: R. surname: Bingham fullname: Bingham, R. organization: Space Phys. Div., Rutherford Appleton Lab., Didcot, UK – sequence: 15 givenname: B. J. surname: Kellett fullname: Kellett, B. J. organization: Space Phys. Div., Rutherford Appleton Lab., Didcot, UK |
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Snippet | The auroral density cavity (a region of partial plasma depletion situated at an altitude of around 3200km at the Earth's pole) has been studied to have a... |
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SubjectTerms | Cyclotrons Earth Educational institutions Laboratories Magnetosphere Physics Plasmas |
Title | Laboratory experiment to investigate the impact of background plasma on cyclotron emission |
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