RELECRELECprojectproject

((RRelativisticelativistic ELECELECtronstrons))

SatellitesSatellites

Low altitudesLow altitudes

GeostationaryGeostationary

BalloonsBalloons

ArcticArctic AntarcticAntarctic

Ionosphere

Atmosphere

particles

Space and balloon studies

Discovery of electron radiation belts Discovery of electron radiation belts onboard ELECTRON satellites in 60’s.onboard ELECTRON satellites in 60’s.

MAXIS (1996) experiment onboard balloons, MAXIS (1996) experiment onboard balloons, Kiruna. High-energy electronsKiruna. High-energy electrons >500>500 keV keV dropouts: dropouts: Registered at low altitudes flux -Registered at low altitudes flux - 55 х 10 х 102525 particles for eight days.particles for eight days.Total number of trapped electrons – Total number of trapped electrons –

22 х 10 х 102525..

History of the problemHistory of the problem

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The short bursts (~100 ms) of precipitated electrons usually The short bursts (~100 ms) of precipitated electrons usually observed at the night-side of trapping boundary. (SAMPEX results).observed at the night-side of trapping boundary. (SAMPEX results).

Precipitation of ~100 keV electrons from radiation belts measured in SAMPEX experiment.

Objective of the workObjective of the work

The investigation of relativistic electrons The investigation of relativistic electrons precipitation using data of near-polar precipitation using data of near-polar satellites. satellites. Modeling of acceleration processes and Modeling of acceleration processes and dropout of energetic electrons in process of dropout of energetic electrons in process of radial diffusion and interaction with radial diffusion and interaction with electromagnetic waves in configuration-electromagnetic waves in configuration-dynamic magnetosphere.dynamic magnetosphere.

TasksTasks Identification of RE events and database on Identification of RE events and database on

these measurements creation using these measurements creation using Coronas-I, Coronas-F, Universitetsky-Coronas-I, Coronas-F, Universitetsky-Tatyana satellites, MIR station data and Tatyana satellites, MIR station data and others.others.

Analysis and classification of RE using Analysis and classification of RE using balloon experiments.balloon experiments.

Investigation of space-time characteristics of Investigation of space-time characteristics of RE events in the problems of RE events in the problems of magnetospheric activity and magnetosphere magnetospheric activity and magnetosphere configurationconfiguration..

Project featuresProject features

Joint investigations of RE onboard satellites and Joint investigations of RE onboard satellites and registration of gamma (X-rays) in atmosphere.registration of gamma (X-rays) in atmosphere.

Registration of RE in wide energy range (up to 10 Registration of RE in wide energy range (up to 10 MeV and more). Time resolution is ~100 ms. MeV and more). Time resolution is ~100 ms. Obtaining of spectral and pitch-angle distributions.Obtaining of spectral and pitch-angle distributions.

Registration of low fluxes of RE using large Registration of low fluxes of RE using large geometry factor detectors.geometry factor detectors.

Simultaneous registration of RE, X-rays and UV Simultaneous registration of RE, X-rays and UV rays from atmosphere.rays from atmosphere.

ElectronsElectrons 0.2 – 10 0.2 – 10 MeVMeV

> 10 > 10 MeVMeV

>> 0.3 MeV 0.3 MeV

ProtonsProtons 0.3 – 60 MeV0.3 – 60 MeV

> 50 > 50 MeVMeV

3 – 150 MeV3 – 150 MeV

>150 >150 MeVMeV

GammaGamma 0.05 – 1.0 MeV0.05 – 1.0 MeV

NeutronNeutron 0.1 – 30 MeV0.1 – 30 MeV

X-raysX-rays 10 – 100 keV10 – 100 keV

UVUV 300-400 300-400 nmnm

TOTAL RELEC characteristicsTOTAL RELEC characteristics

MassMass 27 27 kg.kg.

PowerPower 36 36 W.W.

Data flowData flow 10-20 10-20 MbMb//day.day.

Other geophysical and space-Other geophysical and space-physics problems can be solved physics problems can be solved

using the same devicesusing the same devices Lithosphere-ionosphere connections Lithosphere-ionosphere connections

(earthquakes)(earthquakes) Atmosphere-ionosphere connections Atmosphere-ionosphere connections

(thunderstorms)(thunderstorms)

Technical applicationsTechnical applications

Dosimetry and SEU (single event upsets) Dosimetry and SEU (single event upsets) problem taking into account neutron problem taking into account neutron component of radiation.component of radiation.

ParticipantsParticipants

PIPI SINP MSUSINP MSUCo-PICo-PI Lebedev PhIASLebedev PhIAS

Radiation measurementRadiation measurement SINP MSU SINP MSU (Russia, Ukraine)(Russia, Ukraine)

Low-frequency wavesLow-frequency waves IKI RASIKI RAS (Russia, GB, France, Ukraine)(Russia, GB, France, Ukraine)

High-frequency wavesHigh-frequency waves SRC PAS SRC PAS (Poland, Sweden)(Poland, Sweden)

DosimetryDosimetry SINP MSU SINP MSU (Russia, Ukraine, Germany)(Russia, Ukraine, Germany)

Ground complex (Balloons)Ground complex (Balloons) PhIASPhIAS (Russia, Germany)(Russia, Germany)

Possible ways of cooperation:Possible ways of cooperation:

Participation in experimentParticipation in experiment

Coordinated measurementsCoordinated measurements

Data analysis and interpretationData analysis and interpretation