Erlangen 2018 – wissenschaftliches Programm
Q 52.2: Vortrag
Donnerstag, 8. März 2018, 10:45–11:00, K 0.011
A high repetition deterministic ion source — •Cihan Sahin, Philipp Geppert, Adreas Müllers, and Herwig Ott — Technische Universität Kaiserslautern
An ion source with minimal energy spread and deterministic operability has many possible applications in basic research and technical applications including surface spectroscopy, ion microscopy, ion implantation or milling.
Key requirements for these applications include among others a high degree of control of ion trajectories and high rates.
We developed an ion source capable of delivering ions on demand with high fidelity. The basis of our ion source is a magneto-optical trap (MOT) of 87Rb atoms. The atoms are photoionized by a three photon process within a small volume inside the MOT. A symmetric detector setup for electrons and ions allows to detect the ionization fragments.
We can classify the operation of the source in three modes. In the single ion operation mode the electron is used to switch for a short time a gating electrode on and so let the corresponding ion pass. With an additional external trigger deterministic operation mode is enabled and single ions are provided on demand with high fidelity around a rate of 10 000 s−1. The source can also be used in the continuous operation mode delivering ions with a rate of 1 × 106 s−1.