Since the early 2000s, the importance of detectors based on liquefied noble gases has been paramount in the rare event research field, also thanks to their particle discrimination capability and the target's intrinsic radio-purity. One of the most effective implementations of this technology has been the Time Projection Chamber (TPC) based on argon, which allowed an incredible leap in the dark matter and neutrino research field.
In 2015 the CIEMAT Dark Matter group was one of the original proponents of the Global Argon Dark Matter Collaboration, which now gathers most of the groups previously involved in the ArDM, DarkSide-50 and DEAP-3600 experiments, creating a new unified worldwide effort in the DM direct searches field with argon detectors. The collaboration is currently constructing DarkSide-20k, a 20-ton (fiducial) radio-pure TPC filled with argon extracted from underground wells, which will be able to operate completely free of background. The experiment is planned to be the most sensitive for massive WIMPs in operations during the next years. The final objective of the collaboration, towards the end of the next decade, will be the construction of the ultimate Argo detector, with a 300 t fiducial mass, to push the sensitivity to the so-called “neutrino floor”. The Argo experiment will be also capable of performing a set of very high precision measurement of several solar neutrino sources.
In this talk, the status and plans of this project will be presented, highlighting the impact and perspectives of the Spanish contribution.