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Identification of Radial Distance of Plasma Dispersionless Injection Boundary from the Injection Source |
| Identification of Radial Distance of Plasma Dispersionless Injection Boundary from the Injection Source |
| 1Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 1000802Graduate University of the Chinese Academy of Sciences, Beijing 1000493Los Alamos National Laboratory, Los Alamos, New Mexico, USA |
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Identification of Radial Distance of Plasma Dispersionless Injection Boundary from the Injection Source 2008 Chin. Phys. Lett. 25 783-786 |
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Abstract Measurements of energetic particles obtained by the two geosynchronous satellites (1991-080 and LANL-97A) are performed to investigate the plasma injection boundary and source region during the magnetospheric substorms. The measurement method is developed to allow remote sensing of the plasma injection time and the radial distance of injection boundaries by using measured energy dispersion and modelling particle drifts within the Volland--Stern electric field and the dipole magnetic field model. The radial distance of the injection boundary deduced from a dispersion event observed by the LANL-97A satellite on 14 June 1998 is 7.1RE, and the injection time agrees well with the substorm onset time identified by the Polar Ultraviolet Imager. The method has been applied to an event happened at 22.9 UT on 11 March 1998, when both the satellites (1991-080 and LANL-97A) observed the dispersionless character. The results indicate that the radial distance of injection source locates at 8.1RE at magnetotail, and particles move
earthward from magnetotail into inner magnetosphere at 22.5UT.
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| Keywords:
94.30.Cs
95.75.Rs
94.30.Lr
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Received: 24 August 2007
Published: 30 January 2008
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| PACS: |
94.30.cs
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(Plasma motion; plasma convection)
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95.75.Rs
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(Remote observing techniques)
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94.30.Lr
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(Magnetic storms, substorms)
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