6:00pm–7:00pm No-host meet & greet
7:00pm–8:00pm Buffet dinner
8:00pm Announcements and technical presentation
Ph.D. Candidate, Georgia Institute of Technology
SLAC National Accelerator Laboratory
2016 Recipient, Burton J. Moyer Memorial Fellowship
I am characterizing the ionizing radiation generated from high-intensity laser-matter interactions as a function of laser-optics parameters. There is a large scientific community interested in studying matter in extreme conditions, such as those found abundantly in giant planets such as Jupiter. To create these states of matter, scientists use high-power lasers (tera-and petawatt) and focus them down to micrometers onto matter (very high laser intensity). This interaction (and secondary interactions) can generate a tremendous amount of ionizing radiation as a mixed field of electrons, photons, neutrons, etc.
Under supervision of Sayed Rokni at SLAC, my research is finding the relationship between the laser-optics parameters (such as laser intensity) and the dose from the ionizing radiation generated. This information will provide radiation protection programs working with these high-intensity laser facilities to better perform hazard analyses and develop radiological controls.
Read more about Ted and his Ph.D. research in our previous Newsletter (see pages 6-7).
Ionizing Radiation from High-Intensity Optical Lasers
Abstract: Technological advances allow an increasing number of facilities around the world to install multi-terawatt and petawatt optical lasers. Experimenters can focus these laser beams to high intensities (>1017 W/cm2) onto targets to study matter at high pressures and temperatures. This interaction creates a plasma, and additional interaction of the laser pulse with the plasma can accelerate plasma electrons to tens and even hundreds of MeV. The "hot" electrons interact with the target material and the target chamber and generate bremsstrahlung, which can be an ionizing radiation hazard for personnel working on or near these laser facilities.
The Radiation Protection group at SLAC has developed a dose yield model from a systematic study with plasma particle-in-cell (PIC) code and radiation transport code FLUKA to estimate the bremsstrahlung dose generated from high-intensity laser experiments. The development of this model and its use for hazard analysis and designing controls will be presented.
The dinner menu features a pasta buffet:
This meeting will be in the Seaborg Room of The Faculty Club on the UC Berkeley campus. Please note that this room is not wheelchair accessible.
The Faculty Club at UC Berkeley
Berkeley, CA 94720
Phone: (510) 540-5678
IMPORTANT: The Faculty Club is located on the UC Berkeley campus and has no physical street address or single parking area. Please visit the website for information on transportation and parking.