HZDR Research Talks

The HZDR Research Talks usually take place on Wednesdays from 1:00 to 2:00 p.m.

The next dates are:

January 20, 2021

by Dr. Michael Bussmann (CASUS)

December 16, 2020

by Dr. Katerina Falk (Institute of Radiation Physics, High Energy Density) "Ultra-fast x-ray probing of astrophysical plasmas"

With novel high power lasers, we are now able to produce plasma conditions equivalent to those that can be found in the universe such as photo-ionized plasmas found in accretion disks around young stars and in binary systems or dense plasmas (or warm dense matter) found inside planetary interiors, celestial impacts, white dwarfs or crusts of old stars.

Warm dense matter (WDM) is an intermediate state of matter at the transition from a solid to an ideal plasma with characteristic medium-to-high temperatures (0.1−100 eV), solid densities and pressures >Mbar. It is also a transition state during capsule implosion in inertial confinement fusion (ICF). Due to complicated quantum effects and high density WDM is very challenging to describe theoretically and diagnose experimentally. In order to probe these astrophysical plasmas in a laboratory, we develop novel ultra-fast x-ray probes based on short-pulse lasers capable of penetrating into the samples and providing real-time information about the thermodynamic properties and structure with novel methods such as absorption spectroscopy, radiography, phase contrast imaging and x-ray Thomson scattering.

Our recent work at the DRACO laser facility at HZDR focuses on the development of novel x-ray sources driven by short-pulse lasers for the probing of WDM. One of the projects includes a laser-driven betatron source to study laser heated samples in ultra-fast time scale. A second project is dedicated to the development of bright K-alpha sources and X-ray spectroscopy to diagnose proton acceleration processes by PW-class lasers. In this talk, the recent experiments at DRACO will be presented and potential applications outlined.

The HDZR Research Talks are a program for HZDR employees of all research fields. Within this framework, scientists give lectures on current projects, methods and procedures and look forward to exchanging ideas with colleagues in order to jointly develop ideas and initiate projects. The Research Talks are also open to external interested parties.

• Lectures and discussions are held in English.
• Participation is free of charge.
• Registration is not required. External visitors need to check in at the HZDR main entrance 30 min in advance.

Initiator:
Dr. Franziska Lederer (Helmholtz Institute Freiberg for Resource Technology, Dept. Biotechnology)
Phone: +49 351 260 2427
E-Mail: f.lederer@hzdr.de

Co-organizers:
Dr. Kristof Zarschler (Institute of Radiopharmaceutical Cancer Research, Dept. Radionuclide Theragnostics)
Phone: +49 351 260 3678
E-Mail: k.zarschler@hzdr.de

Dr. Peter Zahn (Institute of Ion Beam Physics and Materials Research, Dept. Scaling Phenomena)
Phone: +49 351 260 3121
E-Mail: p.zahn@hzdr.de

Dr. Björn Drobot (Institute of Resource Ecology, Dept. Biogeochemistry)
Phone: +49 351 260 2759
E-Mail: b.drobot@hzdr.de

Dr. Sandra Hamann (Research Programmes and International Projects)
Phone: +49 351 260 3649
E-Mail: s.hamann@hzdr.de

Past lectures:

• Dr. Richard Gloaguen (Helmholtz Institute Freiberg for Resource Technology, Exploration): "From satellites to drones: imaging Earth with innovative technologies"
• Dr. Josefine Metzkes-Ng (Institute of Radiation Physics, Application-oriented Laser-plasma Accelerators):  "Laser-driven ion accelerators for applications in radiobiology"
• Dr. Sebastian Reinecke (Institute of Fluid Dynamics, Experimental Thermal Fluid Dynamics): "Methods for more efficiency in water resource recovery"
  
• Dr. Björn Drobot (Institute of Resource Ecology, Biogeochemistry): "What we can learn from the ’f’ in f-elements"
• Dr. Dominik Kraus ( Institute of Radiation Physics, Helmholtz Young Investigator Group High Energy Density): "Warm dense matter: investigating planets and stars in the laboratory"
• Dr. Yordan Georgiev (Institute of Ion Beam Physics and Materials Research, Transport Phenomena in Nanostructures, Head of Nanofabrication): "Ultra sensitive biosensors based on the simplest possible field effect transistor"
• Dr. Matthias Streller (Communication & Media Relations): "The DeltaX student laboratory – a place of research and education"
• Prof. Dr. Heidemarie Schmidt (Institute for Solid State Physics, Friedrich Schiller University Jena): "Adhesion of biomolecules to a CHIP using surface-near electrostatic forces"
• Dr. Elke Beyreuther (Institute of Radiation Physics, Laser Particle Acceleration): "Radiobiological effect dependencies on proton beam quality revealed by zebrafish embryo"
• Dr. Nicole Matschiavelli (Institute of Resource Ecology, Biogeochemistry): "The disposal of high-level radioactive waste – some microbial issues"
• Dr. Kristof Zarschler (Institute of Radiopharmaceutical Cancer Research, Radionuclide Theragnostics): "How to make a radiolabeled protein: a story of protein expression, functionalization and characterization"
• Dr. Gregor Hlawacek (Institute of Ion Beam Physics and Materials Research, Ion Induced Nanostructures): "Helium Ion Microscopy for biological samples: Achievments and Challenges"
• Dr. Franziska Lederer (Helmholtz Institute Freiberg for Resource Technology, Biotechnology): "Development of biological tools for the recycling of electronic scrap"