Current dates

10. Week 2024


Thursday, 03. 7.

Special Seminar

Time, Place:

11:00 ,Zentraler Seminarraum / Central seminar room (library)

Speaker:

Moniruzzaman Shaikh, PhD; Postdoctoral Fellow Lawrence Berkeley National Laboratory

Title:

tba

11. Week 2024


Tuesday, 03.12.

Special Seminar

Time, Place:

14:00 ,Central Seminar Room, Library Building

Speaker:

Taiki Jikei, University of Tokyo

Title:

Magnetic Field Amplification In Weakly Magnetized Astrophysical Shocks and Laboratory Laser Experiment

Astrophysical shocks are one of the most promising candidate for cosmic ray acceleration. Although there is a well established shock acceleration model, some problems such as the electron injection problem, and energy partition in the downstream remain unsolved. These problems are related to the plasma micro-physics in the shock transition region. In weakly magnetized, or high Alfven Mach number, shock transition region, ion-Weibel instability is known to be the dominant plasma instability. The Weibel instability can generate a turbulent magnetic field even without a background magnetic field. However, we show that a weak, but finite, background magnetic field can enhance the growth of the Weibel magnetic field, and also result in richer non-linear evolution including magnetic reconnection in the transition region. These may contribute to the electron pre-acceleration in high Mach number non-relativistic shocks, such as supernova remnants. We also discuss a possible laboratory experiment of this physics using high-intensity lasers.

Saturday, 03.16.

Physik am Samstagmorgen - Nie wieder zu spät!

Time, Place:

09:30 ,Otto-Hahn-Hörsaal, Bibliotheksgebäude

Speaker:

Prof. Dr. Piet O. Schmidt, PTB Braunschweig: Optische Uhren und ihre Anwendungen; Vera Schäfer, MPIK: Uhren auf der Suche nach neuer Physik

Schülerveranstaltung mit Laborführung - wir bitten um Anmeldung auf der Webseite oder Tel. 201 (Ruth Crespo)