IAS has a new and exciting arrival: a new mobile dilution cryostat has been built and delivered by BlueFors Cryogenics, allowing us to measure detectors and detection chain elements at sub-Kelvin temperatures. Irradiation of highly sensitive detectors by cosmic rays is a daunting problem for many space missions, and the IAS is among the laboratories that have been investigating this problem since the launch of Planck-HFI.