The recent installation of a Multi-Reflection Time-of-Flight (MR-TOF) isobar separator at the CARIBU facility has the promising potential to significantly improve the mass separation and selection of short-lived neutron-rich beams. Ions cycled in the km-long isochronous trajectories between two electrostatic mirrors can be separated to high levels of mass-resolving power within a short time (tens of ms). The installation process is described and results from the first operation are discussed. Following an optimization of the mirror voltages a mass-resolving power of 6.8·104 was achieved and a separation of isobars was demonstrated. The higher purity beams provided by the MR-TOF and delivered to the Canadian Penning Trap (CPT) will provide access to further measurements of neutron-rich nuclei along the astrophysical r-process path.
Publication Source (Journal or Book title)
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Hirsh, T., Paul, N., Burkey, M., Aprahamian, A., Buchinger, F., Caldwell, S., Clark, J., Levand, A., Ying, L., Marley, S., Morgan, G., Nystrom, A., Orford, R., Galván, A., Rohrer, J., Savard, G., Sharma, K., & Siegl, K. (2016). First operation and mass separation with the CARIBU MR-TOF. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 376, 229-232. https://doi.org/10.1016/j.nimb.2015.12.037