Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 2: Ultra-cold atoms and molecules I (joint session A/MO/Q)
A 2.5: Vortrag
Montag, 11. März 2019, 11:30–11:45, S HS 1 Physik
Using a Quartz Crystal Micro-Balance for the characterization of a Zeeman Slower — •A. Chavarria Sibaja1,2, A. Godinez Sandi1,2, K. Hernandez Jimenez1,2, S. Thiel Pizarro1,2, M. Guevara Bertsh3, and O.A. Herrera Sancho1,2,4 — 1Escuela de Física. University of Costa Rica — 2CICIMA. University of Costa Rica — 3Institut fur Quantenoptik und Quanteninformation. University of Innsbruck — 4CICANUM. University of Costa Rica
We present here the developement of an experimental apparatus that consists of a Gd atoms source and 1 m-long multi-layer solenoidal Spin-Flip Zeeman Slower, and the propose of an alternative method to measure the atoms velocity, based on using of a Quartz Crystal micro-balance (QCM), which is normally used in thin film deposition process in solid-state physics. We observed that the measurement of the perturbations induced in the natural frequency of the QCM by the deposition mass process and the momentum exchange of the particles when they hit the crystal surface, allow to determine the change in the kinetic energy of Gd atoms. In this experiment, we focus a 447,2 nm laser into a counter-propagating beam of Gd atoms in order to drive the strongest dipole atomic transition from the ground 9D 0 state to the exited state 9D. Additionally we measure the variations of velocity of the atoms at the end of our Zeeman-Slower with a QCM,in order to characterize the effectiveness of our apparatus, as part of the future developement of magneto-optical trap system. We obtain preliminary results of 39% of reduction of the velocity of the Gd atoms respect to their initial velocity using a current of 3 A.