Speaker
Tom Segal
(Max-Planck-Institut für Kernphysik, Heidelberg, Germany)
Description
THe-Trap is a Penning-trap mass spectrometer that aims to measure
the atomic mass ratio of tritium to helium-3 with a relative uncertainty
of 1 · 10−11 . To test the experiment’s accuracy and precision, we
measured the mass ratio of carbon-12 to oxygen-16, which is one of
the most precisely determined mass ratios [1].
In 2014 we reported a measurement of this mass ratio with a relative
uncertainty of 6.3 · 10−11 [2], which was limited by systematic effects.
Since then we upgraded the experiment, including the ion source, the
vacuum system, and the amplifier for the detection of the induced
image current. Due to the improved ion storage times we were able to
characterize the amplitude dependent systematic shifts [3] and reach a
significantly lower uncertainty that approaches the uncertainty of the
literature value.
[1] R. S. Van Dyck Jr. et al., Int. J. Mass Spectrom. (2006) 251:231–242
[2] S. Streubel et al., Appl. Phys. B (2014) 114: 137–145
[3] J. Ketter et al., Int. J. Mass Spectrom. (2014) 358: 1–16
Primary author
Tom Segal
(Max-Planck-Institut für Kernphysik, Heidelberg, Germany)
