Stopped RIBs for St. Benedict at Notre Dame*

The Superallowed Transition Beta-Neutrino Decay Ion Coincidence Trap (St. Benedict), currently under construction at the University of Notre Dame Nuclear Science Laboratory, aims at measuring the beta-neutrino angular correlation parameter in superallowed mixed beta decay transitions between mirror nuclei. Such measurements will allow us to improve the precision on the extraction of the Vud matrix element in these transitions. St. Benedict will take a radioactive ion beam produced by TwinSol, thermalize it in a large volume gas cell, then transport it into two separates, differentially pumped, volumes using a radiofrequency (RF) carpet and a radio-frequency quadrupole (RFQ) ion guide before injecting it in an RFQ trap to create cool ion bunches for injection into the measurement Paul trap. Results of the off-line commissioning of the gas catcher and its extraction system and the online installation will be presented.