will be made of silicon, which only weights 44% as much. Filling all 31 towers at this ratio would result in about 222 kg Although the project has suffered repeated delays (earlier plans hoped for construction to begin in 2014 and 2016), it remains active, with space allocated in SNOLAB and a scheduled construction start in early 2018. The construction of SuperCDMS at SNOLAB started in 2018 with beginning of operations in early 2020s. The project budget at the time was US$34 million. In May 2021, the SuperCDMS SNOLAB detector was under construction, with early science (or prototyping, or preliminary studies) ongoing with prorotype/testing hardware, both at the SNOLAB location and at other locations. The full detector was expected ready for science data taking at the end of 2023, and the science operations to last 4 years (with two separate runs) 2023-2027, with possible extensions and developments beyond 2027. GEODM proposal A third generation of SuperCDMS is envisioned, although still in the early planning phase. GEODM (Germanium Observatory for Dark Matter), with roughly 1500 kg of detector mass, has expressed interest in the SNOLAB "Cryopit" location. Increasing the detector mass only makes the detector more sensitive if the unwanted background detections do not increase as well, thus each generation must be cleaner and better shielded than the one before. The purpose of building in ten-fold stages like this is to develop the necessary shielding techniques before finalizing the GEODM design. References External links SuperCDMS web site Experiments for dark matter search Fermilab experiments