2-D ION ENERGY SPECTROMETER CORALL

Welcome to CORALL home page.

Yu.I.Yermolaev, A.O.Fedorov, O.L.Vaisberg, V.M.Balebanov, Yu.A.Obod

Space Research Institute, Russian Academy of Sciences, Russia

R.Jimenez, J.Fleites, L.Llera

Intercosmos, Republic Cuba

A.N.Omelchenko

Institute of Applied Geophysics, Russian Hydrometeorological Service, Russia

Description

Hemispherical electrostatic ion energy spectrometer CORALL has fan-shaped field-of-view of 10 x 150 degrees. Satellite rotation with period about 2 min enables one to perform quasi-3D measurements of Energy/Charge ion distribution function in the range from 30 to 24200 eV/q with good energy resolution. The accumulation time on 1 energy step is 1/1024-th of the satellite rotation period, i.e. about 100 msec, and the scan period of 1 energy spectrum (32 steps) is equal to about 4 min. The main technical features of instrument are presented in Table.

Technical Characteristics of Spectrometer CORALL

Instrument CORALL was designed and fabricated jointly by IKI RAN and INTERCOSMOS of Republic of Cuba.

Operation and Measurements

Since August 14, 1995 the instrument is working. However, there were any problems with system BNS which provides pulse of satellite rotation (The CORALL uses this pulse for performance of measurements in inercia coordinate system). Since August 31, 1995 the complex BNS + CORALL is operating properly.

The following picture shows measurements of ion energy spectra with 3 polar channels of instrument during magnetopause crossing on 19:52 UT October 18.

Click picture to get big one.

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