Frankfurt 2006 – wissenschaftliches Programm
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A: Atomphysik
A 14: Atomare Systeme in externen Feldern II
A 14.5: Vortrag
Mittwoch, 15. März 2006, 17:30–17:45, H6
A Novel Trap Design for the Determination of the Proton g-Factor — •Susanne Kreim1, Klaus Blaum1,2, Wolfgang Quint2,3, Stefan Stahl4, Stefan Ulmer1,3, Jose Verdu3, and Jochen Walz1 — 1Institut für Physik, Universität Mainz, 55099 Mainz, — 2GSI, 64291 Darmstadt — 3Ruprecht-Karls-Universität, 69047 Heidelberg — 4Stahl-Electronics, 67582 Mettenheim
Determining the g-factor of a single, isolated proton in a double Penning trap setup results from an accurate measurement of its cyclotron and spin precession frequency. This frequency can be determined by inducing radio frequency transitions between the two spin states in the homogeneous magnetic field region of the first, precision Penning trap. The spin-flip transition is detected in another region, namely the magnetic bottle field of the analysis trap. There, the spin direction is monitored by measuring the respective axial frequency of the trapped particle via a phase-sensitive measurement exploiting the continuous Stern-Gerlach effect. However, the proton spin-flip is very small compared to measurements with the bound electron. Therefore, a new analysis trap had to be developed - the hybrid Penning trap. In the center it consists of a toroidal, highly ferromagnetic ring increasing the difference in axial frequency by an order of magnitude. To this end, an adept combination of magnetic and electrical properties had to be found. The result of these calculations as well as the current design of the hybrid trap will be discussed.