Lunar Lander Neutrons & Dosimetry on Chang'E 4

At 02:26 UTC on January 3, 2019, the Chinese Chang’E-4 mission softlanded in the von Kármán crater on the far side of the Moon first time in human history after it launched at 18:23 UTC on December 7, 2018 and spent about a month travelling from Earth to the Moon. 

The Chang’E-4 mission consists of a lander, a rover, and a relay satellite named Queqiao to enable the communication between lunar backside and the Earth. The mission is equipped with four international scientific payloads, including Netherlands-China Low Frequency Explorer (NCLE) from Netherlands, Advanced Small Analyzer for Neutrals (ASAN) from Sweden, lunar optical imaging equipment from Saudi Arabia, and our own contribution, the Lunar Lander Neutrons & Dosimetry (LND) experiment from Germany — built by Institut für Experimentelle und Angewandte Physik, Kiel University.

LND, as mentioned in its name, is designed to be the first active monitor for the radiation dose on the Moon, preparing for human exploration. Additionally, its neutron measurements could be used to infer the sub-surface water content. Apart from this, our instrument could also observe the energetic particle enviroment in near Earth space and make contributions to heliospheric science. The first results of LND are to be published soon. 

Das LND-Instrument

Up to January, 2020, the LND instrument has been working for 13 lunar days, accumulating a large amount of data from the lunar far side, and will continue to operate in the future. For more details about LND, please refer to the instrument paper.

Additional links:

LND data and publications

Nature news about Chang'E 4