Speaker
Description
ORRUBA (the Oak Ridge Rutgers University Barrel Array) comprises the largest suite of highly-segmented silicon detectors for radioactive beam physics in the US. It was initially conceived as a standalone ~300-channel detector array for measuring (d,p) reactions on fission fragments around the Coulomb barrier. Initial experiments were performed in 2006, including the first measurement of the 132Sn(d,p)133Sn reaction.
Over the following two decades, ORRUBA has been further developed and expanded (now 1200 channels), with various auxiliary detectors. It has been deployed at numerous facilities (ATLAS, NSCL, FRIB, HIgS, ...) for measurements of direct and compound nuclear reactions spanning a wide range of beam energies and masses, to inform nuclear structure, reactions, astrophysics and applications. Particular mileage has been gained from coupling to other instruments, including the GODDESS coupling to large HPGe arrays (Gammasphere and GRETINA), and coupling to the S800 spectrometer and the JENSA gas-jet target. An overview of some of these experiments, upgrades and results will be presented, with a focus on recent experiments (including the first at FRIB), and a look toward future plans for operation with the SECAR recoil separator and GRETA at FRIB and ATLAS.
Work supported in part by the US DOE Office of Science (NP) under Contracts DE-AC05-00OR22725 (ORNL), DE-AC52-07NA27344 (LLNL), DE-FG02-96ER40963 (UTK), DE-AC02-05CH11231 (LBL), under (NNSA) Contract no. DE-NA0003897 (Rutgers), and the National Science Foundation.