10 research outputs found
Half-open Penning trap with efficient light collection for precision laser spectroscopy of highly charged ions
We have conceived, built and operated a 'half-open' cylindrical Penning trap
for the confinement and laser spectroscopy of highly charged ions. This trap
allows fluorescence detection employing a solid angle which is about one order
of magnitude larger than in conventional cylindrical Penning traps. At the same
time, the desired electrostatic and magnetostatic properties of a closed-endcap
cylindrical Penning trap are preserved in this congfiuration. We give a
detailed account on the design and confinement properties, a characterization
of the trap and show first results of light collection with in-trap produced
highly charged ions
Switchable Magnetic Bottles and Field Gradients for Particle Traps
Versatile methods for the manipulation of individual quantum systems, such as
confined particles, have become central elements in current developments in
precision spectroscopy, frequency standards, quantum information processing,
quantum simulation, and alike. For atomic and some subatomic particles, both
neutral and charged, a precise control of magnetic fields is essen- tial. In
this paper, we discuss possibilities for the creation of specific magnetic
field configurations which find appli- cation in these areas. In particular, we
pursue the idea of a magnetic bottle which can be switched on and off by
transition between the normal and the superconducting phase of a suitable
material in cryogenic environments, for example in trap experiments in moderate
magnetic fields. Methods for a fine-tuning of the magnetic field and its linear
and quadratic components in a trap are presented together with possible
applications
Experimental Studies of Highly Charged Ions in a Penning Trap for the Measurement of Electron Magnetic Moments by Double-Resonance Spectroscopy
A precise measurement of bound-electron g factors in highly charged ions provides stringent tests for state-of-the-art theoretical calculations, such as relativistic electron-correlation, bound-state QED, and higher-order Zeeman effects. We excite the fine-structure transition of boronlike argon (40Ar13+) with laser radiation and probe microwave transitions between Zeeman sub-levels in the magnetic field of a Penning trap. From this laser-microwave double-resonance technique the g factor can be determined on a ppb level of accuracy in our apparatus. We have built a novel ’half-open’ Penning trap with high fluorescence-detection efficiency and an integrated electron-beam ion source for production of highly charged ions from gas, injected through a cryogenic valve. In the future, heavier ions shall be captured from the HITRAP facility at GSI and the method shall be applied to hyperfine-structure transitions of hydrogenlike bismuth (209Bi82+) in order to measure electronic and nuclear magnetic moments. This thesis presents experimental developments as well as production, cooling, transport, and long-term storage of highly charged argon ions