Newsletter June 2020
Dear colleagues and friends of the HI-Jena,
Welcome to the June 2020 issue of our institute newsletter. First of all, we apologize the delay of our newsletter: as at many other research institutes and universities worldwide, also at HI-Jena we went through the very difficult time of a complete lock-down in response on the COVID-19 crisis. Despite these difficult circumstances, research continued at HI-Jena as well as at its partner institutions. This is documented by the current issue of our institute newsletter; see below. Meanwhile, workshops and laboratories are again in operation under strict hygienic and safety rules.
We would like to take this opportunity to thank all our institute members and colleagues for their continued compliance with the necessary regulations, and are very confident that we will cope with this new and challenging situation.
Kind Regards,
Helmholtz Institute Jena
Civil construction of the additional institute’s building has started
In March 2020, civil construction of the additional institute’s building has begun. Excavation work is well underway on the site located next to the main building of the HI-Jena at Fröbelstieg 3. Construction is expected to take 24 months, and will provide the institute with additional office, seminar and laboratory space. We will periodically update you on the progress of the construction work on the HI-Jena webpage.
FAIR storage ring CRYRING ready for use
The first FAIR storage ring, the so-called CRYRING, is ready to conduct experiments for the scientific research community. CRYRING is an extremely successful ion storage ring that has enabled key research contributions in atomic and molecular physics in Stockholm for many years. It was brought to GSI and FAIR in Darmstadt as a Swedish in-kind contribution. Here it was modernized, adapted to FAIR standards and connected to the experimental storage ring ESR at GSI under the project name “CRYRING@ESR”. Along with the already existing trapping facility HITRAP, the ESR and the future high-energy storage ring HESR, CRYRING will be part of the unique portfolio of trapping and storage facilities for heavy ions of FAIR.
GSI press release: https://www.gsi.de/en/start/news/details/2020/06/08/cryring_einsatzbereit0.htm
New Measurement Exacerbates Old Problem
Two prominent X-ray emission lines of highly charged iron have puzzled astrophysicists for decades: their measured and calculated brightness ratios always disagree. This hinders good determinations of plasma temperatures and densities. New, careful high-precision measurements, together with top-level calculations now exclude all hitherto proposed explanations for this discrepancy, and thus deepen the problem. Researchers from the GSI Helmholtzzentrum für Schwerionenforschung Darmstadt and the Helmholtz Institute Jena (HI Jena), a branch of GSI, are also involved in the investigations. The results are now published in the prestigious “Physical Review Letters” journal.
GSI Press release: https://www.gsi.de/en/start/news/details/2020/06/02/neue_messung_verschaerft_altes_problem0.htm
Record compression delivers ultra-short laser pulses: New possibilities for ultra-fast physics and plasma acceleration
With the help of a special “light compressor”, a team of researchers has produced ultrashort laser pulses at DESY. In collaboration with colleagues from Sweden and France, scientists led by Christoph Heyl from DESY and the Helmholtz Institute Jena succeeded in compressing high-energy laser pulses of about one third of a millimetre in length to under a hundredth of a millimetre in just one step. “This corresponds to a factor of almost 40, a new record for a single compression stage for high-energy laser pulses,” says Heyl. Around 80 percent of the energy of the original laser pulse was retained. In a further step, the researchers compressed the pulses to only about 4 thousandths of a millimeter (micrometre), which is about one tenth of the thickness of a human hair. The team presents its work in the journal Optics Letters.
DESY press release: https://www.desy.de/news/news_search/index_eng.html?openDirectAnchor=1821&tw
Upcoming events
Eigth Joint Lecture Week of RS-APS and HGS-HIRe
Online
This lecture week will be organized by RS-APS in cooperation with HGS-HIRe. Owing to the current situation, this event will be an online-only videoconference, realized through the Zoom service.
Topic: The Prospects of Cryogenic Detectors and Superconducting Electronics: From Fundamental Research to Applications
Please find the detailed agenda here.
Recently finished theses
Petawatt-Class Laser Optimization and Ultrashort Probe Pulse Generation for Relativistic Laser-Plasma Interactions
I. Tamer
(2020)
https://www.db-thueringen.de/receive/dbt_mods_00040833
High energy radiation from compact plasma-based sources
B. Lei
(2019)
https://www.db-thueringen.de/receive/dbt_mods_00040306
Untersuchung und Simulation der Ionisations- und Streudynamik von Photoelektronen mithilfe von Zwei-Farben-Feldern
D. Würzler
(2019)
https://www.db-thueringen.de/receive/dbt_mods_00039885
Recent publications
A compact, turnkey, narrow-bandwidth, tunable, and high-photon-flux extreme ultraviolet source
V. Hilbert, M. Tschernajew, R. Klas, J. Limpert, and J. Rothhardt
AIP Adv. 10, 045227 (2020)
doi: 10.1063/1.5133154
A synchronized VUV light source based on high-order harmonic generation at FLASH
E. Appi, C. C. Papadopoulou, J. L. Mapa, N. Wesavkar, C. Jusko, P. Mosel, S. Ališauskas, T. Lang, C. M. Heyl, B. Manschwetus, M. Brachmanski, M. Braune, H. Lindenblatt, F. Trost, S. Meister, P. Schoch, R. Treusch, R. Moshammer, I. Hartl, U. Morgner, and M. Kovacev
Sci. Rep. 10, 6867 (2020)
doi: 10.1038/s41598-020-63019-2
High-energy-density-science capabilities at the Facility for Antiproton and Ion Research
K. Schoenberg, V. Bagnoud, A. Blazevic, V. E. Fortov, D. O. Gericke, A. Golubev, D. H. H. Hoffmann, D. Kraus, I. V. Lomonosov, V. Mintsev, S. Neff, P. Neumayer, A. R. Piriz, R. Redmer, O. Rosmej, M. Roth, T. Schenkel, B. Sharkov, N. A. Tahir, D. Varentsov, and Y. Zhao
Phys. Plasmas 27, 043103 (2020)
doi: 10.1063/1.5134846
K-line X-ray fluorescence from highly charged iron ions under dense astrophysical plasma conditions
J. Deprince, M. Bautista, S. Fritzsche, J. García, T. Kallman, C. Mendoza, P. Palmeri, and P. Quinet
X-Ray Spec. 49, 29 (2020)
doi: 10.1002/xrs.3040
Opportunities for negative ions studies at the Frankfurt Low-energy Storage Ring (FLSR)
O. Forstner, J. Müller, and K. Stiebing
Hyperfine Interact. 241, 53 (2020)
doi: 10.1007/s10751-020-1697-1
The photon-ion merged-beams experiment PIPE at PETRA III—The first five years
S. Schippers, T. Buhr, A. Borovik Jr., K. Holste, A. Perry-Sassmannshausen, K. Mertens, S. Reinwardt, M. Martins, S. Klumpp, K. Schubert, S. Bari, R. Beerwerth, S. Fritzsche, S. Ricz, J. Hellhund, and A. Müller
X-Ray Spec. 49, 11 (2020)
doi: 10.1002/xrs.3035
Accurate retrieval of ionization times by means of the phase-of-the-phase spectroscopy, and its limits
D. Würzler, S. Skruszewicz, A. M. Sayler, D. Zille, M. Möller, P. Wustelt, Y. Zhang, J. Tiggesbäumker, and G. G. Paulus
Phys. Rev. A 101, 033416 (2020)
doi: 10.1103/PhysRevA.101.033416
Carrier-envelope-phase measurement of few-cycle mid-infrared laser pulses using high harmonic generation in ZnO
R. Hollinger, D. Hoff, P. Wustelt, S. Skruszewicz, Y. Zhang, H. Kang, D. Würzler, T. Jungnickel, M. Dumergue, A. Nayak, R. Flender, L. Haizer, M. Kurucz, B. Kiss, S. Kühn, E. Cormier, C. Spielmann, G. G. Paulus, P. Tzallas, and M. Kübel
Opt. Express 28, 7314 (2020)
doi: 10.1364/OE.383484
Characteristics of ion beams generated inthe interaction of ultra-short laser pulseswith ultra-thin foils
A. McIlvenny, H. Ahmed, C. Scullion, D. Doria, L. Romagnani, P. Martin, K. Naughton, A. Sgattoni, D. R. Symes, A. Macchi, P. McKenna, M. Zepf, S. Kar, and M. Borghes
Plasma Phys. Contr. F. 62, 054001 (2020)
doi: 10.1088/1361-6587/ab7d26
Detectable Optical Signatures of QED Vacuum Nonlinearities Using High-Intensity Laser Fields
L. Klar
Particles 3, 223 (2020)
doi: 10.3390/particles3010018
Giant Isolated Attosecond Pulses from Two-Color Laser-Plasma Interactions
Y. X. Zhang, S. Rykovanov, M. Shi, C. L. Zhong, X. T. He, B. Qiao, and M. Zepf
Phys. Rev. Lett. 124, 114802 (2020)
doi: 10.1103/PhysRevLett.124.114802
Observing the Importance of the Phase-Volume Effect for Few-Cycle Light-Matter Interactions
Y. Zhang, D. Zille, D. Hoff, P. Wustelt, D. Würzler, M. Möller, A. M. Sayler, and G. Paulus
Phys. Rev. Lett. 124, 133202 (2020)
doi: 10.1103/PhysRevLett.124.133202
Polarization-dependent high-intensity Kapitza-Dirac effect in strong laser fields
B. Böning, W. Paufler, and S. Fritzsche
Phys. Rev. A 101, 031401 (2020)
doi: 10.1103/PhysRevA.101.031401
Post-compression of picosecond pulses into the few-cycle regime
P. Balla, A. B. Wahid, I. Sytcevich, C. Guo, A.-L. Viotti, l. Silletti, A. Cartella, S. Alisauskas, H. Tavakol, U. Grosse-Wortmann, A. Schönberg, M. Seidel, A. Trabattoni, B. Manschwetus, T. Lang, F. Calegari, A. Couairon, A. LHuillier, C. Arnold, I. Hartl, and C. M. Heyl
Opt. Lett. 45, 2572 (2020)
doi: 10.1364/ol.388665
Proton acceleration via the TNSA mechanism using a smoothed laser focus
M. Afshari, J. Hornung, A. Kleinschmidt, P. Neumayer, D. Bertini, and V. Bagnoud
AIP Adv. 10, 035023 (2020)
doi: 10.1063/1.5117236
Visualization of relativistic laser pulses in underdense plasma
M. B. Schwab, E. Siminos, T. Heinemann, D. Ullmann, F. Karbstein, S. Kuschel, A. Sävert, M. Yeung, D. Hollatz, A. Seidel, J. Cole, S. P. D. Mangles, B. Hidding, M. Zepf, S. Skupin, and M. C. Kaluza
Phys. Rev. Accel. Beams 23, 032801 (2020)
doi: 10.1103/PhysRevAccelBeams.23.032801
Breakdown of the electric dipole approximation at Cooper minima in direct two-photon ionisation
J. Hofbrucker, A. V. Volotka, and S. Fritzsche
Sci. Rep. 10, 3617 (2020)
doi: 10.1038/s41598-020-60206-z
High-power ytterbium-doped fiber laser delivering few-cycle, carrier-envelope phase-stable 100 µJ pulses at 100 kHz
E. Shestaev, D. Hoff, A. M. Sayler, A. Klenke, S. Hädrich, F. Just, T. Eidam, P. Jójárt, Z. Várallyay, K. Osvay, G. G. Paulus, A. Tünnermann, and J. Limpert
Opt. Lett. 45, 97 (2020)
doi: 10.1364/ol.45.000097
Strong-Field Ionization with Few-Cycle Bessel Pulses: Interplay Between Orbital Angular Momentum and Carrier Envelope Phase
W. Paufler, B. Böning, and S. Fritzsche
(2019)
https://doi.org/10.1007/978-981-13-9969-5_26