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MPINP:
Speichertechnik - Abteilung Blaum
Abstract:
TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN) has specialized
in fast Penning Trap mass spectrometry of very short-lived radioactive
isotopes. The facility has been upgraded with a Multiple-Reflection
Time-of-Flight Mass Spectrometer (MR-TOF-MS) to continue its quest
towards more exotic nuclides, which are critical for our understanding
of nuclear structure effects far from the valley of beta stability and
for the nucleosynthesis of heavy elements in explosive astrophysical
environments. In this publication, we discuss the implementation,
operation and performance of TITAN's MR-TOF-MS as a stand-alone
high-precision mass spectrometer and as an isobar separator. By using
the novel mass-selective re-trapping technique for the isobar
separation, the MR-TOF-MS can consecutively perform separation and mass
measurement of the same ion population, acting as its own isobar
separator. The device boosts the dynamic range and reach of the TITAN
facility by several orders of magnitude. The MR-TOF-MS reaches a high
mass resolving power (m/Delta m similar to 400 000), high precision and
mass accuracy (delta m/m < 10(-7)), is fast (common cycle time 20 ms),
shows high sensitivity and very large dynamic range (ion of interest to
contaminant ratios of up to 1 to 10(6)).
