Design Studies of an Electrostatic Storage Ring

Electrostatic storage rings combine a number of very interesting characteristics that make them an attractive tool in the low energy range. In contrast to magnetic rings, all of the fields in an electrostatic storage ring are completely mass independent. At the same particle energy and charge state, ions from light protons to heavy biomolecules can in principal be stored with identical field setups. A small ring for ions of energies up to 50 keV is planned to be built up at Goethe University in Frankfurt. Different designs have been calculated and the results are presented in this contribution. Furthermore, prototypes of the necessary optical elements have been manufactured and are described as well

An Electrostatic Quadrupole Doublet with an Integrated Steerer

Electrostatic storage rings have proven to be a valuable tool for atomic and molecular physics. Due to the mass independence of the electrostatic rigidity, different kinds of ions with the same charge/energy ratio from light protons to very heavy bio molecules can be stored with the same field setup. The transverse dimensions of the circulating beam are controlled by electrostatic quadrupole doublets or triplets. It is essential that the fields in these lenses can be adjusted independently one from another to allow an exact control of the stored ions. In this paper, first an overview of the principle of electrostatic lenses is given. After a short discussion of fringe field effects, the results of field calculations are presented and the final layout of an electrostatic quadrupole doublet with an integrated steerer as it will be used in future electrostatic storage rings in Frankfurt and Heidelberg is discussed

An Electrostatic Quadrupole Doublet with an Integrated Steerer

Electrostatic storage rings have proven to be a valuable tool for atomic and molecular physics. Due to the mass independence of the electrostatic rigidity, different kinds of ions with the same charge/energy ratio from light protons to very heavy bio molecules can be stored with the same field setup. The transverse dimensions of the circulating beam are controlled by electrostatic quadrupole doublets or triplets. It is essential that the fields in these lenses can be adjusted independently one from another to allow an exact control of the stored ions. In this paper, first an overview of the principle of electrostatic lenses is given. After a short discussion of fringe field effects, the results of field calculations are presented and the final layout of an electrostatic quadrupole doublet with an integrated steerer as it will be used in future electrostatic storage rings in Frankfurt and Heidelberg is discussed

FIRE — the Frankfurt Ion Storage Experiments

Existing electrostatic storage rings have proven to be a valuable tool for molecular and atomic physics in the low-energy regime. At the new Stern-Gerlach Center of Frankfurt University a small machine for ion energies up to 50 keV will be build up. It will serve as a tool to analyze the structure and dynamics of many particle systems from atoms to complex organic biomolecules. It will be possible to prepare the particle beams of interest in novel and unique ways. In direct comparison to traditional setups, the luminosity of the measurements will be improved by many orders of magnitude. In combination with the newest reaction microscopes, the rankfurt on stoage xperiments (FIRE) will allow analysis of many particle fragmentation processes of atoms and molecules with unrivaled resolution and completeness. In contrast to experiments with traps, an electrostatic storage ring has the advantage of being able to record the momenta of all neutral fragments. This paper gives an overview of the design parameters, the optical elements used and the project status

La prise en charge de l'autisme

LILLE2-BU Santé-Recherche (593502101) / SudocSudocFranceF

Ring of FIRE

A small electrostatic storage ring is the central machine of the Frankfurt Ion stoRage Experiments (FIRE) which will be built up at the new Stern-Gerlach-Center of Frankfurt University. With ion energies up to 50 keV it enables the analysis of complex many-particle systems from atoms to very large bio molecules. The high luminosity of the beam allows measurements with many orders of magnitude better resolution compared to traditional measurements. It will be combined with existing experiments, like the reaction microscope COLTRIMS and the ECR ion source. In comparison to earlier designs, the ring lattice was modified in many details: Problems in earlier designs were related with e.g. the detection of light particles and highly charged ions with different charge states. Therefore, the deflectors were redesigned completely, allowing a more flexible positioning of the diagnostic elements. In this contribution, the final design of the storage ring is presented and the layout of all elements given

Design studies of an electrostatic storage ring, Particle Accelerator Conference,

Abstract Electrostatic storage rings combine a number of very interesting characteristics that make them an attractive tool in the low energy range. In contrast to magnetic rings, all of the fields in an electrostatic storage ring are completely mass independent. At the same particle energy and charge state, ions from light protons to heavy biomolecules can in principal be stored with identical field setups. A small ring for ions of energies up to 50 keV is planned to be build up at Goethe University in Frankfurt. Different designs have been calculated and the results are presented in this contribution. Furthermore, prototypes of the necessary optical elements have been manufactured and are described as well

Design Studies of an Electrostatic Storage Ring

Electrostatic storage rings combine a number of very interesting characteristics that make them an attractive tool in the low energy range. In contrast to magnetic rings, all of the fields in an electrostatic storage ring are completely mass independent. At the same particle energy and charge state, ions from light protons to heavy biomolecules can in principal be stored with identical field setups. A small ring for ions of energies up to 50 keV is planned to be built up at Goethe University in Frankfurt. Different designs have been calculated and the results are presented in this contribution. Furthermore, prototypes of the necessary optical elements have been manufactured and are described as well

Process-influenced fatigue behavior of AISI 316L manufactured by powder- and wire-based Laser Direct Energy Deposition

Because of the enormous potential of Laser Direct Energy Deposition (L-DED) regarding the production and maintenance of components with complex geometries, this type of Additive Manufacturing processes is of great industrial and scientific interest. As two principals of L-DED, i.e., wire-based (L-DED-W) and powder-based (L-DED-P) processes, are commonly used, it is indispensable to thoroughly analyze the influence of the raw material as well as process conditions on the resulting material properties. Therefore, in the present work specimens made of AISI 316L and manufactured via L-DED-P and L-DED-W were investigated. To characterize the cyclic properties of the produced material volume, instrumented cyclic indentation tests (CITs) as well as uniaxial fatigue tests were performed. The cyclic deformation behavior obtained in fatigue tests indicate a significantly higher fatigue strength of L-DED-W material, correlating with a higher \textgreekd-ferrite fraction and smaller grain size. This is caused by the different process conditions, whereby the increased \textgreekd-ferrite fraction of L-DED-W results from the difference in chemical composition. However, the S-Nf curves show a higher fatigue limit at 2 × 106 cycles for L-DED-P, which is caused by the significantly larger process-induced nonmetallic inclusions observed in L-DED-W specimens. In summary, the present work shows significant differences between the material produced with L-DED-P and L-DED-W, and demonstrates a strong influence of process-induced defects on the fatigue behavior of additively manufactured materials