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DESY CONNECT "Campfire Talk": Paul Söding & Christian Stegmann

uploaded March 7, 2024

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Lifetime determination of key astrophysical transitions in highly charged ions at European XFEL

Measuring the lifetime of excited states of highly charged neon ions using X-rays at the SQS (Small Quantum Systems) experiment station of the European XFEL in Schenefeld near Hamburg. Dr. Chintan Shah from the NASA Goddard Space Flight Centre, USA, uses the so-called pump-and-probe method in the soft X-ray regime. The novel two-color mode of the SASE3 undulator at the European XFEL...
- 05:17 duration
- 7 views
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Single-particle X-ray imaging of phycobilisome light harvesting antenna at high repetition rate

Cyanobacteria are also capable of photosynthesis. However, the chemical processes involved are very difficult to study in a near-natural environment. At the SPB/SFX experiment station of the European XFEL in Schenefeld near Hamburg, the team led by Patrick Konold from Uppsala University, Sweden, is trying to gain an unprecedented insight into the light-harvesting mechanism of...
- 04:01 duration
- 1 views
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Femtosecond-XES characterization of spin-states and structures of transient iron(III)-oxyl species

Compounds of iron with oxygen are relevant for many processes - from the transport of oxygen in the blood to the corrosion of iron. However, many aspects of iron-oxygen chemistry are not yet fully understood. It is generally believed that the magnetic orientations of the electrons involved - the so-called spin state - also play an important role, e.g. in catalytic processes. Using...
- 04:07 duration
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The hRIXS spectrometer at the SCS instrument explained by Dr. Benjamin van Kuiken

The SCS instrument (Spectroscopy and Coherent Scattering) enables scientists to unravel the electronic and structural properties of complex materials, molecules, and nanostructures. Examples of experiments carried out with the SCS instrument include investigating ultrafast magnetization processes on the nanoscale, the real-time observation of chemical reactions in liquids, and understanding...
- 05:07 duration
- 1 views
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Das FXE-Instrument von European XFEL

Mit der FXE-Experimentierstation am European XFEL lassen sich auf atomarer Ebene extrem schnelle chemische Prozesse untersuchen. Ultrakurze Röntgenlaserpulse ermöglichen es den Forschern, die schnellen Veränderungen von Molekülen im Verlauf von Reaktionen im Detail zu beobachten. Die Proben sind in einem Flüssigkeitsstrahl gelöst. Sie werden mit einem in der Animation rot dargestellten...
- 01:22 duration
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The FXE instrument at the European XFEL

The FXE instrument at the European XFEL is designed to analyse chemical processes that are otherwise too fast to observe. Short pulses of laser-like X-rays, which can pick up atomic details, give scientists deeper insight into the rapid changes in molecules during an ongoing reaction. Samples are dissolved in a liquid jet. The molecules are energised with an optical laser, shown in red, which...
- 01:22 duration
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Das MID-Instrument bei European XFEL

Am MID Instrument des European XFEL können Forschende die Struktur und Dynamik von Materialien mit molekularer bis atomarer Auflösung untersuchen. Hierfür fokussieren sie Röntgenpulse auf das zu untersuchende Material, von wo aus das Röntgenlicht in verschiedene Richtungen gestreut wird. Die Anordnung der Atome im Material führt zu einem charakteristischen Streumuster, das von einem...
- 02:03 duration
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The MID instrument at the European XFEL

At the MID instrument of European XFEL, researchers can investigate the structure and dynamics of materials with molecular to atomic resolution. To do this, they focus X-ray pulses on the material to be studied from where the X-rays are scattered in different directions. The arrangement of the atoms in the material leads to a characteristic scattering pattern, which is recorded by a detector....
- 02:03 duration
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Tunnelflug // Tunnel flight 2017

Tunnel flight through the X-Ray Laser Facility European XFEL Tunnelflug durch die Röntgenlaseranlage European XFEL
- 06:10 duration
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Virenforschung am European XFEL

In diesem primär an Oberstufenschüler:innen gerichteten Kurzfilm wird die Virenforschung am European XFEL thematisiert. Anhand der am European XFEL stattgefundenen Coronavirus-Forschung werden die verschiedenen Schritte bei der Erforschung von Viren erklärt und veranschaulicht.
- 09:07 duration
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Virus research at European XFEL

This short movie, which is primarily aimed at senior high school students, focuses on virus research at European XFEL. The various steps involved in researching viruses are explained and illustrated using the coronavirus research carried out at European XFEL.
- 09:07 duration
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Funktionsweise des SPB-Instruments mit Flüssigkeitsstrahlen

Erklärung der Funktionsweise und Datenerfassung des Instruments SPB mit Flüssigkeitsstrahlen, das zur Erforschung biologischer Proben und Prozesse am European XFEL eingesetzt wird.
- 00:59 duration
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Functionality of the SPB instrument with liquid jets

Explanation of the functionality and data acquisition of the SPB instrument with liquid jets, which is used for research into biological samples and processes at the European XFEL.
- 00:59 duration
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European XFEL Pump-Probe Lasers: The Making (long version)

This time-lapse video shows the 11-month installation of one of the pump-probe laser systems at European XFEL. Pump-probe lasers are highly specialised pulsed optical lasers. They use high repetition rates, high energy, and ultrashort infrared pulses to stimulate a sample. This pulse is followed by an X-ray laser pulse that captures an image of the sample. Many images are put together to make...
- 05:20 duration
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European XFEL Pump-Probe Lasers: The Making

This time-lapse video shows the 11-month installation of one of the pump-probe laser systems at European XFEL. Pump-probe lasers are highly specialised pulsed optical lasers. They use high repetition rates, high energy, and ultrashort infrared pulses to stimulate a sample. This pulse is followed by an X-ray laser pulse that captures an image of the sample. Many images are put together to make...
- 03:39 duration
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Detectors at European XFEL / Detektoren bei European XFEL

Detector scientist Dr. Monica Turcato explains the detectors at all six experiment stations at European XFEL (with German subtitles) Detektorwissenschaftlerin Dr. Monica Turcato erklärt die Detektoren an allen sechs Experimentierstationen des European XFEL (englische Sprache mit mit deutschen Untertiteln)
- 10:42 duration
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Research at the European XFEL on twisted bilayer MoS2 and gold nanoparticles on Titanium oxide

Kai Rossnagel from Kiel University and Deutsches Elektronen-Synchrotron DESY in Hamburg conducted quantum materials research at the new SXP instrument (Soft X-ray Port). The scientific focus of the experiment is on two model interface systems: twisted bilayer MoS₂ and gold nanoparticles on Titanium oxide (TiO₂). He and his team investigated the effect of destructive interference...
- 04:14 duration
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Research at the European XFEL: Small quantum systems research on core-hole state dynamics in oxygen

Jan-Erik B. I. Rubensson from Uppsala University in Sweden conducted the first extreme ultraviolet (XUV) spectrometer experiment at the Small Quantum Systems instrument (SQS) at the European XFEL. The new 1D imaging X-ray spectrometer was used to investigate how non-linear processes can influence the core-hole state dynamics observed in the resonant inelastic X-ray scattering (RIXS)...
- 07:42 duration
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Research at the EuXFEL on dynamics of charge transfer across strongly-correlated oxide interfaces

By selectively pumping the SrTiO3 layers with 266 nm ultrafast laser pulses, Teguh Citra Asmara from European XFEL triggered a dynamic transfer of photoelectrons across the interface from SrTiO3 into the LaNiO3 layers Spectroscopy & Coherent Scattering instrument (SCS). This charge transfer will dynamically change the transient electronic and magnetic states of LaNiO3. These interfacial charge...
- 05:43 duration
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Research at the European XFEL on amorphous solids under shock compression

Sally June Tracy from Carnegie Institution of Washington, Earth and Planets Laboratory, USA, studied phase transitions in amorphous solids under shock loading. The structure of amorphous materials and liquids at high pressure and temperature remains a fundamental unsolved problem in dynamic materials science. European XFEL’s Diode Pumped Optical Laser (DiPOLE) at the High Energy...
- 06:18 duration
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Research at the European XFEL: High energy density research on planetary interior conditions

Mixtures of light elements are predicted to be the major components in the depths of the ice giant planets Neptune and Uranus. Their dynamics, evolution, and interior structure are insufficiently understood, and models rely imperatively on data for equation-of-state and transport properties. At the extreme pressures and temperatures of a few 1000 Kelvin of planetary interiors, very peculiar...
- 04:43 duration
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Research at the European XFEL: Femtosecond X-ray experiments research on gold complexes

Sharmistha Paul Dutta from European XFEL was probing the aurophilicity and solvation dynamics in stimuli-responsive dimer complexes at the FXE instrument (Femtosecond X-ray Experiments). Optical studies suggest that in the "free" ligand configuration the aurophilic effect strongly depends on the solvent environment while the exact electronic and structural origins of aurophilicity...
- 04:16 duration
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Research at the European XFEL: Materials imaging and dynamics research on laser peening

Laser peening is a surface treatment technique that improves the mechanical performance of metals. It can be used to increase material’s resistance to crack initiation, extend fatigue life and to enhance fatigue strength. Most studies of laser peening used nanosecond pulsed lasers, which require a sacrificial coating and a transparent overlay. Femtosecond laser peening without a protective...
- 03:40 duration
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Megahertz time resolved X-ray microscopy research on micro-droplets for fighting brain tumor at the European XFEL

Brain disorders are affecting one in three people during the course of their lives. Emmanouil Manolis Gavaises from University of London in UK investigated ultrasound-activatable droplets for brain tumor therapy at European XFEL’s SPB/SFX instrument. He and his team characterised the physico-chemical features of monodisperse perfluorocarbon micro-droplets (PFCD) excited by high intensity...
- 04:30 duration
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Small quantum systems research on trans-cis isomerization in molecular photoswitches at the European XFEL

Photoisomerization plays a crucial role in many biological and technological applications. However, the precise mechanism(s) in which molecular photoswitches such as azobenzene undergo photoisomerization is still debated. No previous experimental investigation has revealed the femtosecond nuclear dynamics of photoisomerization. Kasra Amini from Max Born Institute in Berlin and his...
- 06:22 duration
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Research at the European XFEL: Water research on spontaneous crystallization

Water is one of the most ubiquitous and vital substances for our survival and is thus also one of the most well-studied samples in fundamental research. E.g. understanding ice nucleation in metastable water is important for many research fields, including cryobiology, astrophysics and atmospheric science. In this experiment at European XFEL’s SPB/SFX instrument Jonas A. Sellberg...
- 03:35 duration
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Research at the European XFEL: Femtosecond X-ray experiment research on structural dynamics of water

Water is one of the most important substances on our planet. Its structure, phase behaviours and structural dynamics have become interesting subjects. In this experiment at the Femtosecond X-ray Experiment instrument (FXE) Qingyu Kong from Synchrotron SOLEIL in France probes the structural dynamics of water using femtosecond X-ray solution scattering. The researcher focused on the...
- 03:00 duration
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Research at the European XFEL: Materials imaging and dynamics research on pre-hydrate cage formation

Felix Lehmkühler from Deutsches Elektronen-Synchrotron DESY in Hamburg elucidates the onset of the cage/hydration shell formation with regards to clathrate nucleation. The aim is to investigate a known hydrate forming guest called THF mixed with water at a 1:17 ration cooling from 277 K will facilitate the onset of clathrate formation. This is done with the high time resolution and...
- 03:37 duration
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Research at the European XFEL: Structural biology research on bacterial insecticides

Lainey Williamson and Hannah Best from Cardiff University in UK investigate structural biology of bacterial insecticides. Bacterial insecticides from Bacillus thuringiensis can specifically target e.g. agricultural pests, but do not harm other insects and are safe for higher organisms. Using such insecticides for agricultural purposes instead of chemical agents will help to stop the decline in...
- 02:36 duration
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Research at the European XFEL: High energy density research on solid and liquid phases

Malcolm McMahon from University of Edinburgh examines melting and elastic properties of Fe, Fe-Si alloys. The very special DiPOLE laser at the instrument HED (High Energy Density) at the European XFEL, with its unprecedented repetition rate and exquisite pulse control combined with HED’s large detectors enables the team to make diffraction studies of solid and liquid phases at...
- 04:22 duration
- 4 views
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Research at the European XFEL on multiphoton collective lambshift in nuclear resonant scattering

Ralf Röhlsberger from Friedrich Schiller University Jena examines special light-matter interaction. The observation of the collective Lambshift (CLS) of Mössbauer nuclei has recently opened the field of experimental nuclear quantum optics. The origin of the CLS lies in the exchange of virtual photons within an ensemble of closely spaced identical atoms, e.g., in an x-ray waveguide, which...
- 02:52 duration
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Research at the EuXFEL on the structural pathway of glass formation in supercooled liquid water

Tobias Eklund from Johannes Gutenberg University in Mainz and Katrin Amann-Winkel from Max Planck Institute for Polymer Research in Mainz turned water into glass. Amorphous ices are suggested to be the liquid counterparts of two different liquid states of water. Eklund and Amann-Winkel used low-density amorphous ice as starting material for an infrared-pump-X-ray-probe experiment at...
- 03:31 duration
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Research at the European XFEL on unknown phases and crystallization pathways in water

Recent discoveries, such as high-density amorphous ice (HDA) at room temperature, prediction of plastic phases in ice VII, and the formation of new ice XIX phase have strongly requested to unveil the origin of their formation and transition pathways with unambiguous experimental evidence. Geun Woo Lee from Korea Research Institute of Standards and Science (KRISS) unveils unknown...
- 04:30 duration
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Spectroscopy and coherent scattering on catalysts for C-H bonds of saturated alkanes at the European XFEL

C-H bonds of saturated alkanes are inert and hence hard to break. Catalysis with 4d and 5d transition metal complexes in solution provides ways for C-H bond cleavage, whereas earth-abundant 3d metal catalysts have not been discovered to date. Raphael M. Jay from Uppsala University in Sweden and his team investigates how to make 3d metal complexes reactive for C-H activation. The...
- 02:41 duration
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Research at the European XFEL: Small quantum systems research on water dimer dynamics

Olle Björneholm from the Uppsala University in Sweden explains how he probes ultrafast hydrogen bond dynamics in water with the X-ray laser of the European XFEL. Water is the key solvent and natural environment for all species of biological interest. Its unique properties are intimately connected to the still incompletely understood intermolecular hydrogen bond. The investigation of...
- 03:45 duration
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Research at the European XFEL: Materials imaging and dynamics research on hydrogen bonding in water

Claudia Goy from Deutsches Elektronen-Synchrotron DESY in Hamburg examines water with ultrafast X-ray photons from the European XFEL. This experiment at the Materials Imaging & Dynamics instrument (MID) addresses the fundamental properties of the hydrogen bonding in water and specifically the question whether or not different ions can act either as “structure-makers” or...
- 05:20 duration
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featured
DESY CONNECT "Campfire Talk": Paul Söding & Christian Stegmann

Campfire Talk: Ein Gespräch, vertraut, persönlich und entspannt, wie am Lagerfeuer. Das erste Gespräch am Lagerfeuer halten Paul Söding, ehemaliger DESY-Forschungsdirektor, und Christian Stegmann, derzeitiger Direktor der Astroteilchenphysik. Ein interessanter Austausch mit persönlichen Erinnerungen an die Forschungsgeschichte von DESY und die Entwicklung des Standorts Zeuthen. ...
- 59:01 duration
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DESY Innovation Factory (English version)

The DESY Innovation Factory will become a center for start-ups, bridging research and new ideas in the fields of life sciences and new materials.
- 01:20 duration
- 35 views
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DESY Innovation Award 2023

Der diesjährige DESY Innovation Award geht an Christoph Reinhardt (DESY, Fachbereich FH-ALPS) und Hossein Masalehdan (Universität Hamburg, Exzellenzcluster „Quantum Universe", Institut für Quantenphysik). Ihr membranbasierter Drucksensor ermöglicht kalibrationslose Messungen in einem extrem weiten Bereich.
- 01:48 duration
- 73 views
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DESY Innovation Factory

Die DESY Innovation Factory wird ein Zentrum für Start-ups, Brückenforschung und neue Ideen in den Bereichen Life Science und New Materials werden.
- 01:20 duration
- 193 views
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Tobias Eklund and Katrin Amann-Winkel describe water research at FXE

Water research experiment: Turning water into glass. User experiment at FXE instrument at European XFEL.
- 02:57 duration
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Felix Lehmkuehler describes water research at MID

Water research experiment: Probing Pre-Hydrate Cage Formation. User experiment at the MID experiment station of European XFEL.
- 03:02 duration
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International Cosmic Day 2023

Christian Stegmann welcomes the participants of the International Cosmic Day
- 00:47 duration
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featured
DESY DAY 2023

At DESY Day 2023 we presented scientific highlights of the past months and welcomed our newly appointed scientists. The prerequisites for excellent top-level research are created by all DESY employees. That is why we honour our scientists every year on the DESY Day and pay tribute to the many years of personal contribution of our employees.
- 02:36:30 duration
- 657 views
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Closing

Closing by Volker Schomerus (DESY)
- 02:12 duration
- 41 views
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Quantum Analytic Langlands Correspondence

"Quantum Analytic Langlands Correspondence" by Joerg Teschner (DESY & University Hamburg)
- 39:51 duration
- 20 views
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Convolution algebras related to Khovanov homology

"Convolution algebras related to Khovanov homology" by Catherina Stroppel (University of Bonn)
- 39:01 duration
- 16 views
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Topological aspects of Laplace eigenfunctions on the round 2-sphere (defects, anomalies, paradoxes)

"Topological aspects of Laplace eigenfunctions on the round 2-sphere (defects, anomalies, paradoxes)" by Clifford Taubes (Harvard University)
- 41:29 duration
- 14 views
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Langlands duality in quantum topology

"Langlands duality in quantum topology" by David Jordan (University of Edingburgh)
- 41:48 duration
- 29 views
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Hypergeometric integrals, hook formulas, and Whittaker vectors

"Hypergeometric integrals, hook formulas, and Whittaker vectors" by Giovanni Felder (ETH Zurich)
- 36:29 duration
- 13 views
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Welcome

DESY CONNECT "Campfire Talk": Paul Söding & Christian Stegmann

All media

Lifetime determination of key astrophysical transitions in highly charged ions at European XFEL

Single-particle X-ray imaging of phycobilisome light harvesting antenna at high repetition rate

Femtosecond-XES characterization of spin-states and structures of transient iron(III)-oxyl species

The hRIXS spectrometer at the SCS instrument explained by Dr. Benjamin van Kuiken

Das FXE-Instrument von European XFEL

The FXE instrument at the European XFEL

Das MID-Instrument bei European XFEL

The MID instrument at the European XFEL

Tunnelflug // Tunnel flight 2017

Virenforschung am European XFEL

Virus research at European XFEL

Funktionsweise des SPB-Instruments mit Flüssigkeitsstrahlen

Functionality of the SPB instrument with liquid jets

European XFEL Pump-Probe Lasers: The Making (long version)

European XFEL Pump-Probe Lasers: The Making

Detectors at European XFEL / Detektoren bei European XFEL

Research at the European XFEL on twisted bilayer MoS2 and gold nanoparticles on Titanium oxide

Research at the European XFEL: Small quantum systems research on core-hole state dynamics in oxygen

Research at the EuXFEL on dynamics of charge transfer across strongly-correlated oxide interfaces

Research at the European XFEL on amorphous solids under shock compression

Research at the European XFEL: High energy density research on planetary interior conditions

Research at the European XFEL: Femtosecond X-ray experiments research on gold complexes

Research at the European XFEL: Materials imaging and dynamics research on laser peening

Megahertz time resolved X-ray microscopy research on micro-droplets for fighting brain tumor at the European XFEL

Small quantum systems research on trans-cis isomerization in molecular photoswitches at the European XFEL

Research at the European XFEL: Water research on spontaneous crystallization

Research at the European XFEL: Femtosecond X-ray experiment research on structural dynamics of water

Research at the European XFEL: Materials imaging and dynamics research on pre-hydrate cage formation

Research at the European XFEL: Structural biology research on bacterial insecticides

Research at the European XFEL: High energy density research on solid and liquid phases

Research at the European XFEL on multiphoton collective lambshift in nuclear resonant scattering

Research at the EuXFEL on the structural pathway of glass formation in supercooled liquid water

Research at the European XFEL on unknown phases and crystallization pathways in water

Spectroscopy and coherent scattering on catalysts for C-H bonds of saturated alkanes at the European XFEL

Research at the European XFEL: Small quantum systems research on water dimer dynamics

Research at the European XFEL: Materials imaging and dynamics research on hydrogen bonding in water

DESY CONNECT "Campfire Talk": Paul Söding & Christian Stegmann

DESY Innovation Factory (English version)

DESY Innovation Award 2023

DESY Innovation Factory

Tobias Eklund and Katrin Amann-Winkel describe water research at FXE

Felix Lehmkuehler describes water research at MID

International Cosmic Day 2023

DESY DAY 2023

Closing

Quantum Analytic Langlands Correspondence

Convolution algebras related to Khovanov homology

Topological aspects of Laplace eigenfunctions on the round 2-sphere (defects, anomalies, paradoxes)

Langlands duality in quantum topology

Hypergeometric integrals, hook formulas, and Whittaker vectors