Within the Jagiellonian Advanced Screening at Canfranc (JASC) project and in cooperation with the Canfranc Underground Laboratory, we are constructing a new ultra-low background HPGe spectrometer based on a large crystal fabricated in the SAGe (small anode) geometry. The materials used for production of the cryostat (copper) and other internal components (detector holder, soldering material, gas adsorber) were carefully selected in cooperation with Canberra (manufacturer of the detector).
The spectrometer will be used for high sensitivity measurements of samples for experiment Jagiellonian University (JU) and LSC are involved in, namely DarkSide-20k, ARGO, LEGEND, NEXT, and for others if time allows.
The detector was delivered to LSC in June 2020 by road transportation, put immediately underground and cooled with liquid nitrogen. Applying the LSC nomenclature, it was named as GeRysy (Rysy is the highest peak in the Polish Tatra mountains).
Fig: GeRysy in the GeLaraca setup
Completed shield with plexiglass housing flushed with 222Rn-reduced air.