Speaker
Description
The Lamb-shift polarimeter (LSP) is a useful detection apparatus to verify nuclear spin polarization for atoms, molecules and ions consisting of hydrogen and/or its isotopes. Its functionality relies on the creation of metastable hydrogen atoms via a charge exchange reaction that preserves the nuclear polarization in a strong magnetic field. The nuclear polarization is then determined by analyzing the relative occupation numbers between different metastable hyperfine states with different nuclear spin projection $m_I$. This makes the LSP a very rapid and cost efficient detection method for beams with a beam energy in the keV range as no pre-acceleration is needed. In the past it could be shown that many of the above mentioned candidates like $H^+$, $D^+$, HD etc. could be measured with success and in this work an additional ion, i.e. $H^-$, adds up to the list. Furthermore, the measurements of polarized $H^-$ ions have been performed for pulsed beams as it was in use for long times at the cooler synchrotron COSY in Jülich. In a second part a theoretical outlook for possible adaptations on the spin filter are given, which is an important component of the LSP. This paves the way to realize experiments like the bound beta decay or parity violation in metastable hydrogen atoms. In addition, a small outlook for possible applications for a $^3{He}$ beam is given.
