Daniela Schäfer

We have developed a stopping cell to be used at the FRS and Super-FRS (Super-conducting FRagment Separator) at the GSI Helmholtz Centre for Heavy-Ion Research and the Facility for Antiproton and Ion Research (FAIR), both in Darmstadt, Germany. The cell has a stopping volume with a length of 1 m and a diameter of 25 cm. It is aimed at operation with high-density helium gas (up to 0.2 mg/cm3). Ours is the first realisation of a stopping cell in which the required purity of the helium stopping gas is ensured by operation at cryogenic temperatures. On the exit side, the ions are guided to the exit hole by an RF carpet with 4 electrodes per mm, operating at a frequency of 5.8 MHz. We present the first commissioning results of the cryogenic stopping cell. Using 219Rn ions emitted as alpha-decay recoils from a 223Ra source, a combined ion survival and extraction efficiency between 10 and 25% is measured for helium gas at a temperature of 85 K and with a density up to 0.07 mg/cm3 (equivalent to a pressure of 430 mbar at room temperature). This density is almost two times higher than demonstrated up to now for RF ion repelling structures in helium gas. Given the operational and design parameters of the system, it is projected that this technology is useful up to a helium gas density of at least 0.2 mg/cm3.

In this paper we study an SU(5) x A5 flavour model which exhibits a neutrino mass sum rule and golden ratio mixing in the neutrino sector which is corrected from the charged lepton Yukawa couplings. We give the full renormalizable superpotential for the model which breaks SU(5) and A5 after integrating out heavy messenger fields and minimising the scalar potential. The mass sum rule allows for both mass orderings but we will show that inverted ordering is not valid in this setup. For normal ordering we find the lightest neutrino to have a mass of about 10-50 meV, and all leptonic mixing angles in agreement with experiment.

HADES is a second-generation dilepton spectrometer for hadron and heavy ion physics at the SIS Accelerator facility of GSI Darmstadt, Germany. The physics programme requires the detection of rare events in an environment of several GBytes/s of background data. This paper describes the dedicated trigger system which works together with a pipelined data acquisition system to suppress background events by 2 orders of magnitude. The trigger system is based on pattern recognition algorithms implemented in FPGAs and DSPs.

LebensmittelchemieVolume 77, Issue S1 p. S1-151-S1-151 Aritlce Methode zur Analyse von Oligosacchariden in Darmproben von Geflügel D.S. Schäfer, D.S. Schäfer Karlsruher Institut für Technologie (KIT), Institut für Angewandte Biowissenschaften, Abteilung für Lebensmittelchemie und Phytochemie, 76131 Karlsruhe, DeutschlandSearch for more papers by this authorA. Rausch, A. Rausch Karlsruher Institut für Technologie (KIT), Institut für Angewandte Biowissenschaften, Abteilung für Lebensmittelchemie und Phytochemie, 76131 Karlsruhe, DeutschlandSearch for more papers by this authorA. Šimić, A. Šimić Harper Adams University, Department of Agriculture and Environment, TF10 8NB, Newport, Vereinigtes KönigreichSearch for more papers by this authorM. Bunzel, M. Bunzel Karlsruher Institut für Technologie (KIT), Institut für Angewandte Biowissenschaften, Abteilung für Lebensmittelchemie und Phytochemie, 76131 Karlsruhe, DeutschlandSearch for more papers by this author D.S. Schäfer, D.S. Schäfer Karlsruher Institut für Technologie (KIT), Institut für Angewandte Biowissenschaften, Abteilung für Lebensmittelchemie und Phytochemie, 76131 Karlsruhe, DeutschlandSearch for more papers by this authorA. Rausch, A. Rausch Karlsruher Institut für Technologie (KIT), Institut für Angewandte Biowissenschaften, Abteilung für Lebensmittelchemie und Phytochemie, 76131 Karlsruhe, DeutschlandSearch for more papers by this authorA. Šimić, A. Šimić Harper Adams University, Department of Agriculture and Environment, TF10 8NB, Newport, Vereinigtes KönigreichSearch for more papers by this authorM. Bunzel, M. Bunzel Karlsruher Institut für Technologie (KIT), Institut für Angewandte Biowissenschaften, Abteilung für Lebensmittelchemie und Phytochemie, 76131 Karlsruhe, DeutschlandSearch for more papers by this author First published: 01 March 2023 https://doi.org/10.1002/lemi.202352121AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL No abstract is available for this article. Volume77, IssueS1Supplement: Abstracts der Vorträge der Regionalverbände und die der Posterflashtalks der AG JLCMarch 2023Pages S1-151-S1-151 RelatedInformation

Multi-layer coating systems are the state of the art for painting of metal and plastic surfaces e.g. in the automotive industry. Utilizing such systems consisting of several specialized coating materials, a high adhesion and a good corrosion protection can be reached, along with good barrier properties, chemical and scratch resistance as well as appealing surface appearance. The interphase regions between single layers of such systems represent areas of a potential weakness, where a delamination and a premature coating degradation can start. To test in a short time the protective properties of the coating, a special hydrothermal cyclic loading test procedure was developed, which causes accelerated build-up of internal stress within the coating system. Using an electrochemical impedance spectroscopy with various optimized electrode geometries, it was possible to detect the early stages of coating degradation and to compare different coating systems. Internal stress measurements contributed additionally to a better understanding of the coating degradation.

Abstract Background and Objectives Sorghum ( Sorghum bicolor L. Moench) is a multipurpose crop with high potential for the bioeconomy. Ten sweet, grain and dual‐purpose sorghum genotypes were compared with respect to sugar‐related traits and cell wall composition. Findings The dual‐purpose hybrids Ganymed, Zerberus, and Tarzan performed better with respect to plant height, cane weight, and juice volume, but the sweet genotype KIT1 produced the highest sugar concentration (°Brix) in the stem. Analytical sugar data demonstrate genotypic differences in terms of sugar composition and concentrations, with sucrose being dominant. The monosaccharide composition of the stem cell wall polysaccharides showed surprisingly little genotypic variability. Variations in contents of lignin and cell wall‐bound hydroxycinnamate monomers were moderate. Conclusions Sweet, grain and dual‐purpose sorghum genotypes differ widely in terms of sugar‐related morphological parameters but are comparable with respect to their cell wall chemistry. Significance and Novelty The use of sorghum as a bioeconomy crop has mainly focused on the extraction of sugar for bioethanol production. However, besides cell wall polymers, the potential usage of hydroxycinnamates as platform molecules for the chemical industry may improve the valorization of the residues after sugar extraction. This application appears to be fairly independent of genotype, further increasing the potential of sorghum for the bioeconomy.

Building Information Modeling (BIM) und die damit einhergehende Digitalisierung von Prozessen wird zunehmend auch in der Umsetzung von Infrastrukturbauvorhaben angewendet, nicht zuletzt unterstützt durch den Stufenplan des Bundesverkehrsministeriums. Hierbei stand bislang die Planungs- und Bauphase im Vordergrund. Die BIM-Methodik entfaltet jedoch ihr volles Potenzial erst über den Lebenszyklus eines Bauwerks, also im Asset Management. Ebenso steigt der Nutzen in Projekten mit hoher technischer Komplexität wie Brücken und Tunnelbauwerken. Am Beispiel des öffentlich-privaten-Partnerschaft (ÖPP)-Projekts A7 mit dem Tunnel Schnelsen wird mit dem Hochtief-eigenen Public Private Partnership Information Management (P3IM)-System die Anwendung der BIM-Methodik im Asset Management aufgezeigt. Wesentliche Bestandteile sind dabei ein schematisches Bauwerksmodell, ein zugehöriges zentrales Informationsmanagement für den gesamten Streckenabschnitt einschließlich Tunnel und Ingenieurbauwerken sowie die jeweiligen Anwendungsfälle (Use Cases). Beispielhaft wird der Prozessablauf des digitalisierten Mängelmanagements unter Einbindung der Projektbeteiligten aus Bauausführung, Bauüberwachung und Auftraggeber erläutert. Die ersten Erfahrungen mit dem P3IM-System weisen deutliche Vorteile der BIM-Methodik in Bezug auf Transparenz, Prozesssicherheit und Effizienz auf. Dies führte in der Praxis zu einer hohen Akzeptanz der Nutzer von Anwendungen im P3IM, verbunden mit dem Wunsch, das P3IM-System kontinuierlich mit weiteren Anwendungsfällen zu ergänzen.

A search for new resonances decaying to WW, WZ or ZZ in the all hadronic final state using 77.3~fb$^{-1}$ of data taken with the CMS experiment at the CERN LHC at a center-of-mass energy of 13 TeV is presented. The search focuses on potential new particles with a mass at the TeV scale resulting in a high transverse momentum of the produced vector bosons. The subsequent decay products of the vector bosons are therefore highly collimated and reconstructed into a single large-radius jet, which are further classified using jet substructure methods. The analysis presented utilizes a new data-driven background modeling technique based on a template fit in a three-dimensional hyperspace spanned by the dijet invariant mass and the corrected jet masses of the two final state jets. This method allows the utilization of the full available signal yield while simultaneously constraining the background processes by including the mass sideband regions in the fit. This grants the opportunity to easily expand this framework to include VH, HH or more exotic signals with different messenger particles in the future. No significant excess is observed above the estimated standard model background and limits are set at 95% confidence level on the cross section times branching fraction of a new particle, which are interpreted in terms of various models that predict spin-2 gravitons or spin-1 vector bosons. In a heavy vector triplet model, spin-1 Z' and W' resonances with masses below 3.5 and 3.8 TeV, respectively, are excluded at 95% confidence level. In a narrow-width bulk graviton model, upper limits on cross sections times branching fractions are set between 27 and 0.2 fb for resonance masses between 1.2 and 5 TeV, respectively. The limits presented in this thesis are the best to date in the dijet final state.

physica status solidi (b)Volume 34, Issue 2 p. K107-K109 Short Note IR Luminescence of ZnS/Mn Crystals D. Schäfer, D. Schäfer I. Physikalisches Institut der Justus Liebig-Universität GießenSearch for more papers by this authorA. Scharmann, A. Scharmann I. Physikalisches Institut der Justus Liebig-Universität GießenSearch for more papers by this author D. Schäfer, D. Schäfer I. Physikalisches Institut der Justus Liebig-Universität GießenSearch for more papers by this authorA. Scharmann, A. Scharmann I. Physikalisches Institut der Justus Liebig-Universität GießenSearch for more papers by this author First published: 1969 https://doi.org/10.1002/pssb.19690340252AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume34, Issue21969Pages K107-K109 RelatedInformation