Ionospheric plasma diagnostic complex (DPK)


Diagnostics of ambient space of ISS in a part of low-energy (< 10 eV) charged particles, measurement of the spacecraft potential, global monitoring and detailed analysis of ionospheric plasma.


The plasma measurements are made by in-situ probe methods with a single block consisting of 10 sensors modified Langmuir probes, Faraday cups-retarding potential analyzers, driftmeter.

The instrument consists of electronic unit DPK-BE and sensor unit DPK-BD. The instrument prototype was successfully used for thermal plasma measurements on Activnyi and Apeks (IK-24, IK-25) satellites. The instrument DPK is under development now by request of RKK Energiya for the Russian segment of ISS.

Main characteristics

Energy range £ 30 eV

Concentration Ne 1025×106 cm3

Concentration Ne 1025×106 cm3

Electron temperature Te 300100 000

Ion temperature Ti 30010 000

Te anisotropy 0.110

Ion mass Mi 2-3 main masses

Spacecraft potential 30+10 V

Plasma drift: angle of arrival/velocity
(horiz. and vert.) 45
/8 km/s

Ni flux fluctuations 0.51000 Hz

Thermal and suprathermal ion flux

(2 directions) ≥ 107 cm2s1

Total mass 3.2 kg

Total power consumption 2.8 W

Dimensions DPK-BE 90×136×215 mm

Dimensions DPK-BD 104×164×164 mm


IPXP-block of sensors (prototype of DPK-BD) wass used in Activnyi and APEKS projects


V.V. Afonin +7(495)333-10-23,
S.A. Aust +7(945)333-11-88,