Newsletter September 2013
Dear colleagues and friends of the HI-Jena,
we are happy to introduce the September issue of our newsletter of the Helmholtz Institute Jena in a new layout.
If you have any problems with displaying the newsletter with your e-mail program please contact Günter Weber (firstname.lastname@example.org). Also any suggestions to improve our newsletter are very welcome.
All previous issues of the newsletter are available on our webpage: http://www.hi-jena.de/en/news/newsletter/
Helmholtz Institute Jena
Optical Control of Hard X-Ray Polarization by Electron Injection in a Laser-Wakefield Accelerator
In the last few years we witnessed a tremendous progress in the development of pulsed x-ray sources. Two promising routes have been mainly followed, on one hand the development of large scale free electron x-ray lasers such as FLASH at Hamburg and LCLS at Stanford and at the other hand the development of laser based sources fitting in a university laboratory. Each of these two different approaches has its strengths and weaknesses, but they are complementary and so both directions of research will bring us closer to study the dynamic of matter with atomic resolution in space and time.
In their recent Nature publication “Optical Control of Hard X-Ray Polarization by Electron Injection in a Laser-Wakefield Accelerator” M. Schnell et al. present for the first time a characterisation of the polarisation state of femtosecond hard X-ray pulses from a laboratory source. In a subsequent step they demonstrate the control of the polarisation, by steering the electrons inside the plasma via shaping ofthe laser pulses. Such a source of hard polarised X-ray pulses will pave the way for studying the dynamics of magnetization via the linear magnetic dichroism or for studying structural changes in thin films employing polarization dependent X-ray absorption fine structure spectroscopy. Additionally, control of the electron trajectories will also have a major impact on the ongoing efforts towards the realization of novel laser based particle accelerators.
News and Announcements
First Joint HGS-HIRe and RS-APS Lecture Week was held in Ulrichshusen Manor.
The first Joint HGS-HIRe (Helmholtz Graduate School for Hadron and Ion Research) and RS-APS (Research School for Advanced Photon Science) Lecture Week took place in Ulrichshusen Manor from August 25-30, 2013. Stimulated by the beautiful location, the lecturers Michael Geissler (U Belfast), Mark Prandolini (HI-Jena & DESY), Christian Spielmann (HI-Jena & U Jena) and Matt Zepf (HI-Jena & U Belfast) discussed enthusiastically together with the attending students the various facets of "The physics of ultrashort laser pulses and laser matter interactions". Although the program of lectures, presentations by the participants and group projects was challenging, there was still time to enjoy the picturesque venue and its surroundings.
New Helmholtz young investigators group for Sergey Rykovanov at Helmholtz Institute Jena.
Dr. Sergey Rykovanov will join HI-Jena in July 2014 as the leader of a Helmholtz Young Investigators Group. The group will work in the area of theoretical relativistic laser plasma and strengthen the activities of the institute in such areas as laser based particle acceleration, generation of X- and gamma-rays and strong-field QED. After receiving his PhD from Ludwig-Maximilians University, Munich in 2009 and staying for two years as a post-doc in the same group, Sergey Rykovanov had moved to the Lawrence Berkeley National Laboratory to work on theoretical and numerical aspects of laser plasma electron acceleration and radiation sources in the LOASIS group led by Dr. Wim Leemans.
During his research career Dr. Rykovanov has been working on novel methods of particle acceleration and radiation generation, which is relevant for current and future research at GSI/FAIR, DESY/XFEL as well as HI-Jena (POLARIS and JETI laser systems).
Current and future research interest of Rykovanov’s group will therefore be:
- Plasma based electron and ion acceleration, methods of injection and controlling the beam properties;
- Conditioning and diagnostics of particle beams;
- Compact X-ray and gamma-ray sources based on laser-plasma accelerated electrons;
- Attosecond physics using laser-plasma interactions;
- Effects of radiation reaction and pair creation in laser-plasma interactions;
- Development of numerical methods and tools, visualization and novel techniques in High-Performance-Computing.
EMMI Workshop on "High energy density plasma diagnostics at FAIR: Novel laser based photon and particle sources"
The workshop focuses on the development of novel diagnostic methods and tools for investigations of High Energy Density Matter (HEDM).
At the Facility for Antiproton and Ion Research (FAIR), the HEDM-states will be created by intense heavy ion beams, which are capable to heat large-volume targets of any elements uniformly and quasi-isochorically. After this, an isentropic expansion in 1D planar geometry will give an opportunity for investigations of the Equation-of-state in unexplored regions of phase transitions, transport and radiation properties of HEDM.
In other experiments relevant to planetary science, multi-shock compression of e.g. cryogenic Hydrogen, inserted in a thick high Z tamper, heated by a rotating Uranium beam, will be investigated. In order to observe different phases of shock dynamics using imaging techniques, pulsed high energy radiation, particle sources an appropriate diagnostic methods are required. In this context imaging applications of laser generated beams of protons, electrons, neutrons and gamma-rays will be discussed.
- Proton generation by interaction of relativistic laser pulses with matter
- Electron acceleration in relativistic laser-plasmas
- A bright neutron source driven by short pulse lasers and applications
- Advanced x-ray and γ-ray sources and applications
- Nuclear physics in laser-matter interactions
- High energy flux x-ray and γ-ray detectors and optics
HGS-HIRe Graduate Days 2013
Worms Conference Center, Worms, Germany
The Graduate Days of the Helmholtz Graduate School for Hadron and Ion Research (HGS-HIRe) are the main annual event of the graduate school.
For two days everybody involved with HGS-HIRe will come together to get an exciting view of the science we are working on.
10th Topical Workshop of the SPARC Collaboration
Main building of the university library, Bibliotheksplatz 2, Jena
This workshop will be organized by the Stored Particles Atomic Physics Research Collaboration (SPARC) and the Helmholtz-Institute Jena.
The SPARC collaboration was established in 2002/03 within the new international Facility for Antiproton and Ion Research (FAIR) at GSI, Darmstadt, Germany, as a comprehensive platform to strengthen international collaborations and to provide and disseminate a broad expertise in atomic physics with highly charged ions.
The symposium program will include reports on the following topics (see also the workshop program):
- Critical and super-critical atomic fields
- Ion-atom/molecule collisions at low to relativistic energies
- HCI in traps and rings for spectroscopy
- Atoms/Ions in intense laser fields
- Ion/Laser-matter interactions
- Cross-link between atomic physics and nuclear physics
- Status of the heavy ion and storage ring facilities
- Novel instrumentation
In addition, a SPARC business meeting will address organizational and financial issues.
Please check out the map to be informed about the hotels in Jena and the conference location.
More information and registration are available on the SPARC webpage: www.gsi.de/sparc
Ideas 2020 - A Tour of Tomorrow's World
Mensa Carl-Zeiss-Promenade, Carl-Zeiss-Promenade 6
The exhibition of the Helmholtz Association “Ideas 2020 – A Tour of Tomorrow’s World” is based on an innovative, interactive concept that aims to make the fascinating complexity and diversity of today’s scientific research accessible to the public. It highlights some of the major scientific research projects being carried out in Germany, in line with the aims and priorities set out in the High-Tech‐Strategy for Germany, the German government’s concept for national research and innovation policy.
More information: http://www.ideen2020.de/
High Resolution Energy-Angle Correlation Measurement of Hard X Rays from Laser-Thomson Backscattering
A. Jochmann, A. Irman, M. Bussmann, J. P. Couperus, T. E. Cowan, A. D. Debus, M. Kuntzsch, K. W. D. Ledingham, U. Lehnert, R. Sauerbrey, H. P. Schlenvoigt, D. Seipt, Th. Stöhlker, D. B. Thorn, S. Trotsenko, A. Wagner, and U. Schramm
Phys. Rev. Lett. 111, 114803 (2013)
Optical control of hard X-ray polarization by electron injection in a laser wakefield accelerator
M. Schnell, A. Sävert, I. Uschmann, M. Reuter, M. Nicolai, T. Kämpfer, B. Landgraf, O. Jäckel, O. Jansen, A. Pukhov, M. C. Kaluza, and C. Spielmann
Nat. Commun. 4, 2421 (2013)
Vacuum-Assisted Generation and Control of Atomic Coherences at X-Ray Energies
K. Heeg, H.-C. Wille, K. Schlage, T. Guryeva, D. Schumacher, I. Uschmann, K. S. Schulze, B. Marx, T. Kämpfer, G. Paulus, R. Röhlsberger, and J. Evers
Phys. Rev. Lett. 111, 073601 (2013)
Proceedings of HCI'12 now published.
The proceedings of the 16th International Conference on the Physics of
Highly Charged Ions (HCI’12) have been published as topical issue of
Physica Scripta and are now available online at http://iopscience.iop.org/1402-4896/2013/T156. More than 20 contributions involve members of the HI-Jena.