Ultra-Low Energy Nuclear Astrophysics at Rings: CARME@CRYRING

Heavy ion storage rings are powerful and flexible tools to carry out investigations of nuclear reactions of interest in a wide variety of fields. First measurements of nuclear reactions that play a key role in astrophysical scenarios were pioneered at the ESR in 2015. In the last decade, this methodology has seen an amazing growth, with several high-impact studies published with stable and radioactive beam using the ESR. The cutting-edge CRYRING Array for Reaction Measurements (CARME, a UK in-kind contribution to FAIR), recently exploited the ultra-low beam storage energies available at CRYRING to further push the boundaries of nuclear astrophysics at rings, measuring deuterium fusion at the energies at which it occurred during the Big Bang. This talk will describe this and other measurements at CARME, as well as the future of this field.