ISTC - GSI YOUNG SCIENTISTS SCHOOL 2011
"Ultra-High Intensity Light Science and Applications" -
Information

Title:	Mr.
Surname:	Yu
First Name:	Tongpu
Middle Name (or initials):
Gender:	male
Date of birth:	23.06.1982
Country:	Germany
Address:	Heinrich-Heine-Universität Düsseldorf, Institut für Theoretische Physik I, Universitätsstraße 1, Gebäude 25.32, D-40225 Düsseldorf
E-Mail:	Tongpu.Yutp1.uni-duesseldorf.de
Phone:	017682169165
Fax:	+492118115194
Name and address:	Prof. Dr. Alexander Pukhov Heinrich-Heine-Universität Düsseldorf, Institut für Theoretische Physik I, Universitätsstraße 1, Gebäude 25.32, D-40225 Düsseldorf
Phone:	+492118113122
Relationship:	superviser
statement on interest:	With a lot of potential applications in Oncology, proton imaging, and inertial confined fusion, laser-driven ion acceleration has drawn increasing attention these years. Recently, one of the most efficient and promising ion acceleration mechanisms, so-called radiation pressure acceleration or the light-sail regime is revisited. 1D simulations have shown a perfect agreement with the theoretical predictions. However, when we extend the model to multi-dimensional cases, several issues take place such as foil target deformation and transverse instabilities, which tend to degrade the stable ion acceleration structure. We are interested in exploring solutions to overcome these issues. To overcome the foil target deformation, we proposed shaped foil target (SFT) which can help keeping the acceleration structure for a longer time as compared to a normal flat target. The final energy spectrum shows a mono-energetic character. Both 2D and 3D simulations show that the protons from the center part of the target can be accelerated monoenergetically and are well collimated in the forward direction. Overall, the beam quality is much improved as compared to the case using a flat foil. Multi-dimensional PIC simulations also show that Rayleigh-Taylor-like (RT) instability can be significantly suppressed by using the additionally proposed two-ion-species shaped foil. A simple three-interface model is proposed to interpret the suppression of the RT-like instability, which agrees well with the numerical observations in a variety of cases. This should be attributed to two effects: ion species separation and heavier ion spreading in space. The heavier ions (carbon ions) act to buffer the compact lighter layer (protons) from the RT-like instability. This laser school provides an excellent opportunity for graduate students, post-docs and fresh researchers to learn and communicate. By participating in this laser school, I might be interested in recent advancedments of laser-plasma interaction, high energy laser-plasma physics, non-linear optics in relativistic regime, and advanced acceleration technologies. Therefore, it would be very appreciated for the school committee to accepte me as a formal participant in this school.
	Selected
Presentation:
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