present conditions. Dotted line: Doppler limit of Mg+ ions of 1 mK. Gray area: possible ion number densities in thermal equilibrium CCD image of an ion crystal Download SPECTRAP Crystals-Poster SPECTRAP [...] however the accuracy was limited because of high ion velocities. For this reason, in order to minimize the Doppler effect (i.e. increase the accuracy), the ions in this experiment are going to be trapped in [...] electric fields, such as exist around the cores of high-Z atoms. Therefore, one aims to produce heavy ions fully stripped of electrons down to a single one in the ground (hydrogen-like) state and do laser

present conditions. Dotted line: Doppler limit of Mg+ ions of 1 mK. Gray area: possible ion number densities in thermal equilibrium CCD image of an ion crystal Download SPECTRAP Crystals-Poster SPECTRAP [...] however the accuracy was limited because of high ion velocities. For this reason, in order to minimize the Doppler effect (i.e. increase the accuracy), the ions in this experiment are going to be trapped in [...] electric fields, such as exist around the cores of high-Z atoms. Therefore, one aims to produce heavy ions fully stripped of electrons down to a single one in the ground (hydrogen-like) state and do laser

absorption of few-electron heavy ions 2011/07/21: QED Theory of the Nuclear Magnetic Shielding in Hydrogenlike Ions 2011/05/25: Hyperfine transitions in He-like ions as a tool for nuclear-spin-dependent [...] sections for low-energy collisions of H-like ions with bare nuclei 2010/09/30: Dominance of Breit Interaction in the X-Ray Emission of Highly Charged Ions 2010/09/26: EMMI workshop on the theory of particle [...] Progress Reports 2012/01/30: Electron dynamics accompanying slow heavy–ion collisions 2012/01/30: b11.stephan-twophoton-absorption-ANDREY 2011/10/31: EMMI workshop on the nonlinear dynamics of simple quantum

(0.25*A/ς [mA]) was reached for argon and lighter ions but not for U 4+ or rare isotopes. For that reason further modifications of the high current ion injector, e.g., geometry of the acceleration gap, [...] after the acceleration system for different ion species with beam energies up to 150 keV and beam currents up to 100 mA. For the measurements a multicusp ion source with a multiaperture accel–decel extraction [...] extraction system has been used to produce high ion beam currents in low charge states. The commissioning has been made using an Ar+ beam. This ion beam is easy to produce in nearly one charge state with

venting system for the ion source vacuum chambers. Through this operators are saving time during source exchange as well as operational safety. Electrode production workshop The ion source department is [...] is able to produce sputtering electrodes for the PIG ion source as well as cathodes for the VARIS and MEVVA ion sources at its own vacuum melting oven. Two turbo molecular pumps (300l/s) are evacuating the [...] Workshops Mechanical workshop Since in the ion source department there is a lot of mechanical construction needed. There is a mechanical workshop working exclusively for the belongings of our group. The

the far side. Ions, on the other hand, penetrate into the body and unfold their damaging effects at the end of their flight path in a specific depth, which depends on the speed of the ions. The dose along [...] reaches a sharp peak in the small—pinhead-sized—tissue volume in which the ions come to a stop. By controlling the speed of the ions, the depth at which this dose maximum occurs can be located precisely within [...] as the biological effectiveness in the tumor while minimizing them in healthy tissues. Accelerated ions meet these objectives far better than the commonly used X-rays. Physical dose distribution As an X-ray

of highly energetic heavy ions and solid state matter: Ion-track formation Radiation hardness of technologically relevant materials Stabilization of high-pressure phases by ion irradiation Nanostructures [...] es fabricated by ion-track technology. Materials Research is an interdisciplinary group (physics, chemistry, engineering, and materials science) that collaborates with over 50 groups in Germany and abroad

current ion sources at GSI In order to compare the beam quality produced by the ion source CHORDIS and the Vacuum arc ion source VARIS, beam emittance measurements have been performed. The ion sources

with stored and cooled ions based on modern techniques for storage and cooling of charged particles. Primarily Penning traps are used for the three dimensional confinement of the ions. The group of young [...] the Experimental Storage Ring (ESR) and the ion trap facility SHIPTRAP are used for the investigation of stored and cooled radionuclides. Furthermore, the ion trap experiment ISOLTRAP at the online mas [...] run by the atomic physics group. In the near future the ion trap facility HITRAP , which is designed for capturing and cooling of highly charged ions produced at the GSI-accelerator complex, will come into

of laser-cooled ion beams at the ESR and the SIS300/FAIR“ Prof. Gerhard Birkl, TU-Darmstadt (IAP) BMBF application (2011): „Flexible laser system for efficient cooling of relativistic ion beams at the ESR [...] Funding BMBF application (2008): „Development of a laser system for efficient laser cooling of ion beams at the ESR and the SIS300/FAIR“ Prof. Thomas Walther, TU-Darmstadt (IAP) BMBF application (2008): [...] TU-Darmstadt (IAP) BMBF application (2011): „Laser-spectroscopic characterisation of relativistic ion beams – optical diagnostic for precision experiments at the ESR and FAIR“ Prof. Gerhard Birkl, TU-Darmstadt