LEBIT Phase II: Developments and Recent Mass Measurements
- Matt Redshaw, NSCL
Thursday, March 1, 11:00 AM - Research Discussion
NSCL Lecture Hall
The LEBIT (Low Energy Beam and Ion Trap) Penning trap mass spectrometry facility at the NSCL was the first to perform mass measurements on rare-isotopes produced via projectile fragmentation. Due to current upgrades to the NSCL’s gas stopping facility and the expansion of experimental programs that will utilize the low-energy beams they provide, LEBIT was temporarily decommissioned in 2009 and relocated to a new experimental vault. This period provided the opportunity to initiate development projects motivated to extend our scientific reach towards more exotic isotopes, i.e. shorter-lived and very low yield, increase efficiency and make more economic use of beam time, expand our off-line mass measurement capabilities, and increase precision for special cases. These developments include the implementation of the SWIFT (Stored Waveform Inverse Fourier Transform) technique to most effectively remove contaminant ions from the Penning trap, a miniature Penning trap for continuous magnetic field monitoring, a laser ablation source to provide reference ions and stable isotopes, and the development of a new Penning trap mass spectrometer with capabilities for performing mass measurements with single ions. The LEBIT system was recommissioned during 2011 with an off-line ion source and a campaign of mass measurements on isotopes of interest for neutrinoless double-beta-decay is underway. In this talk I will discuss the new developments at LEBIT. I will present the first measurements with the relocated LEBIT facility of the mass of 48Ca and discuss the implications for 48Ca double-beta-decay.