B - RAP 3He pumping tube
The resonant-mass gravitational wave detector NAUTILUS has recently recorded signals due to cosmic rays crossing. Very large signals have been observed in the superconductive state of the antenna. In order to investigate this anomalous response at low temperatures, the Rivelazione Acustica di Particelle (RAP) experiment has been approved. Its purpose is the measurement of the mechanical vibrations in a superconducting (TB100 mK) cylindrical aluminium bar when hit by 105 electrons at 510MeV from the DAFNE Beam Test Facility, corresponding to the energies released by extensive air showers in the NAUTILUS antenna. The results of this measurement are crucial to understand the interaction of ionizing particles with bulk superconductors and to confirm the results on the thermo-acoustic model of the past experiments.
RAP: Rivelazione Acustica di Particelle
Constituent: INFN Laboratori Nazionali di Frascati (Italy)
Executant: Leiden Cryogenics