FRIB400: Creating Neutron-Rich Dense Matter, Messengers from Earth

In order to understand astrophysical phenomena and the origin of the elements, it is important to understand the properties of nuclear matter, nuclei, and their interactions. A wide range of properties of nuclei and nuclear matter are important and many of the isotopes involved are unstable and very neutron rich. To performexperiments with such isotopes rare-isotope beam facilities have been and are being built. In addition, significant upgrades and additions are planned to gain access to the most neutron-rich isotopes. At the Facility for Rare Isotope Beams (FRIB), and upgrade in beam energy, from ~200 MeV/nucleon to ~400 MeV/nucleon is planned. In addition, a High Rigidity Spectrometer (HRS) is being constructed. Both of these cotribute strongly to providing access to nuclei of most interest for understanding nuclear astrophysics phenomena. Moreover, the HRS r provides a unique environment for studying neutron-rich (dense) matter through a wide range of experiment opportunities to researchers seeking to understand multi-messenger signals from the universe.