Erlangen 2018 – scientific programme
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A: Fachverband Atomphysik
A 33: Poster Session II
A 33.38: Poster
Wednesday, March 7, 2018, 16:15–18:15, Redoutensaal
Laserspectroscopy experiments at CRYRING@ESR — •Konstantin Mohr1, Aineah Barasa1, Tim Ratajzyk1, Wilfried Nörtershäuser1, Zoran Andelkovic2, Rodolfo Sanchez2, Volker Hannen3, Axel Buß3, and Christian Weinheimer3 — 1Institut für Kernphysik, TU Darmstadt — 2GSI Helmholtzzentrum — 3Institut für Kernphysik, WWU Münster
CRYRING is a storage ring at the GSI Helmholtzzentrum that provides ion-beams with energies in range of 300keV/u up to 14MeV/u for the heaviest ion-species like 238 U 92+ . In 2017 a first ion-beam of H 2+ -ions was established. During the beam-time in November 2017 cooling, acceleration and bunching was successfully tested. In October 2018, first experiments on stored ion-beams are scheduled.
In one of these experiments, Mg will be evaporated in a standard oven and subsequently ionized in a Nielsen-type ion source. After mass separation and injection into CRYRING, 24 Mg + ions will be used for testing whether it is possible to polarize ion-beams in a storage ring by optical pumping. Therefore a cw dye-laser drives the 3s 2S1/2 → 3p 2P1/2 transition of Mg at 280,35 nm. Usage of circular polarized σ+-light will lead to an occupation of the ms -substate with the maximum quantum-number ms = 1/2 . In this case, a previously observed fluorescence signal should vanish. To prove the polarization, σ− or π polarized light can be used for repumping. This poster will present the status of CRYRING for laser spectroscopy experiments.
This work is supported by BMBF under contract numbers 05P15RDFAA and 05P15PMFAA.