Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.5: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Design, construction and operation of a small ion source for measurements in a linear Paul trap — •Sita Eberle, José R. Crespo López-Urrutia, and Maria Schwarz — Max-Planck-Institut für Kernphysik

Gas atoms can be ionized by electron impact ionization in electron beam ion traps (EBIT) and sources (EBIS). A small EBIS based on a pair of Helmholtz coils with a low magnetic field has been designed and built at the MPIK Heidelberg for test operations with a cryogenic linear Paul trap. The device has the advantage of occupying an area of only about one square meter and is more than able to produce the required singly ionized gas atoms. At typical electron beam currents of 0,5mA and energies of 1keV, an ion yield of ~50nA is obtained. Different gases have been tested and yields have been compared with the values predicted by rate estimates.