lune

Sopemea qualifies space instrument for lunar mission

Top News05/31/2023

IRAP, the Institut de Recherche en Astrophysique et Planétologie, has chosen SOPEMEA to carry out the entire EMC qualification campaign for the DORN (Detection of Outgassing RadoN) instrument. DORN will be carried on board the Chinese Chang'E6 mission in 2025 for a landing on the far side of the Moon. The aim of the DORN instrument will be to use alpha spectrometry to measure, for the first time on the Moon's surface, the quantity of Radon, a radioactive gas, that escapes from the lunar surface.

Tests conducted
in Toulouse

EMC test of Dorn prototype
EMC test of Dorn prototype
The various EMC test campaigns consisted of testing the instrument using a functional prototype (Engineering Model) and then the real flight model (Flight Model). 
SOPEMEA used its emission and susceptibility measurement resources in an ISO7 clean zone to carry out these tests. The tests verified that the electromagnetic pollution present on the lunar lander did not impair the instrument's extreme sensitivity and that the instrument did not interfere with the platform's RADIO systems.

Water on

the Moon ?

The Moon's pseudo-atmosphere is constantly changing between what is emanated and what is adsorbed by the ground. This mechanism could explain how water molecules become trapped in polar craters. Analysing the movement of Radon would make it possible to understand the movement of gases and therefore the distribution of particles, including water, on the lunar surface.
Understanding the transport of Radon means getting a close-up view of the transport of water molecules and understanding the presence of water. DORN is a demonstrator of the potential interest of this type of measurement for the exploration of the solar system... but that doesn't mean we won't discover water on Mars during future missions...


Learn more:
An instrument from Toulouse will analyze a gas on the Moon’s surface in 2024 – Institut de Recherche en Astrophysique et Planétologie (omp.eu)

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