Physics of auroral phenomena : proceedings of the 34th Annual seminar, Apatity, 01 - 04 March, 2011 / [ed.: A. G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 231 с. : ил.

Physics o f Auroral Phenomena", Proc. XXXIV Annual Seminar, A patity, pp. 1 7 - 20, 2011 S 7 i \ Polar © Kola Science Centre, Russian Academy of Science, 2011 rtf/ m Geophysical \JJ~J Institute ENERGETIC ELECTRON INJECTIONS TO THE INNER MAGNETOSPHERE DURING MAGNETIC STORMS AND MAGNETOSPHERIC SUBSTORMS L.L. Lazutin1, T.V. Kozelova2 1. Moscow State University, Skobeltsyn Institutefo r Nuclear Physics, Space Physics Division, Vorob'evy Gory, Moscow, 119992, Russia 2. Polar Geophysical Institute, KSC, RAS, Apatity, Abstract. Radial injections of the energetic electron to the inner magnetosphere during magnetic storms are studied using data from the SERVIS-1 low altitude satellite. Fast radial injections with time scale less than 1-2 hours were found during the main storm phase in 0.3-3.4 MeV electron energy channels. Coincidence with an active phase of the magnetospheric substorms was found after inspection o f the auroral zone magnetometer records. It seems that fast electron injectionare the result of the electron radial injection caused by the induced electric field of the magnetic field dipolarization during substorm activations, and «old» radiation belt electrons may be regarded. Introduction Electron radiation belt is extremely dynamic regions, especially during magnetic storms, when processes of the losses, transport, and acceleration of particles are working with complicated concurrency. Inward radial diffusion is regarded as one of the main energetic electron acceleration during magnetic storms and sometimes it took only several hours for the considerable intensity increase [Baker et al., 2004; Vassiliadis et al., 2005; Nagai et al., 2006]. Radial diffusion caused by the magnetic drift resonance with Pc5 magnetic pulsaions is a stochastic process demanding at least several hours for the gradual transport of the energetic particles. But there is also rapid particle injection by the single step, for example by SC induced impulse of the electric field. Such injection was registered during the March 24, 1991 super storm [Li et al., 1993]. Of cause SC-injection is a rare exotic effect, but there are impulsive induced eelctric fields which occur in numbers during magnetic storms, generated by magnetospheric substorms. Short-time induced electric field are important element of the magnetospheric substorms, more exactly substorm activations, responsible for the acceleration of the energetic auroral particles [see Lazutin, 1986 and reference therein]. Two cases of the fast electron flux increase in a slot region were described by [Nagai et a l, 2006]. They did not analyzed substorm activity but suggested that substorms were responsible for the increases. Present work is a part of the case study of energetic electron dynamics during several magnetic storms with comparison of the electron non-adiabatic acceleration with substorm activations. Observations Energetic electron and proton measurements were carried by low-altitude polar orbiter SERVIS-1, Japan, launched from Plesetsk Cosmodrome in Russia on As a «seed» particles freshly accelerated auroral electrons October 30, 2003 on the Sun synchronous orbit in dawn-dusk plane, with altitude 1000 km and inclination 99.5°. Light Particle Detector was a charged particle spectrometer which consists on combined 0.5mm thick SSD and 24mm thick plastic scintillator. It has 60° field of view and oriented in anti solar direction. We will use data of electron channels 0.3-1.5 and 1.7-3.4 MeV from the database provided by Prof. N. Hasebe from Waseda University, Japan. For the identification of the magnetospheric substorm will be used H-component of the magnetogramms of the Chokurdakh (64.7° and 212.1° GM latitude and longitude) and Tixie (65.6° 196.9°) auroral observatories CHD, 11.02. 2004 Fig 1. Dst during February 10-12, 2004 (a) and H- component o f the Chakhurdakh magnetometer records during magnetic storm. Time momens discussed in a text are inducated by the arrows. February 11, 2004 Magnetic Storm Magnetic storm on February 11, 2004 starts at 10 UT and reached Dst minimum -120 nT at 16 UT. The main phase and beginning of the recovery phase were accompanied by substorm activity. ф - W O - U V H ГУК Мурманска* г а с у д -м т ^ л в я I областиtmy»HE 2 i>c 8 ,”s»'.»