Plenary Speakers

Plenary Sessions Wed. 20 April 2022, 9:00-12:00

Plenary Speakers

Tammy Ma Wentao Wang Irina SOROKINA

Tammy Ma

Lawrence Livermore National Laboratory, U.S.A.

Theme:”On the Threshold of Laser Fusion Ignition: Recent Breakthroughs at the U.S. National Ignition Facility and the Pathway to Inertial Fusion Energy”

Abstract

On the Threshold of Laser Fusion Ignition: Recent Breakthroughs at the U.S. National Ignition Facility and the Pathway to Inertial Fusion Energy

In August 2022, a record-breaking shot with 1.3 megajoules of fusion yield was achieved on the U.S. Lawrence Livermore National Laboratory’s National Ignition Facility (NIF), the world’s largest, most energetic laser. This experimental result, decades in the making, is a significant breakthrough for laser-driven inertial fusion. This talk will review the experimental results, the photonics advancements and many more technologies that made this breakthrough possible, and the implications for future research. Furthermore, these recent game-changing results on the NIF now lay the groundwork to explore laser inertial fusion as a path for clean energy and energy security.

Biography

Dr. Tammy Ma is the Advanced Photon Technologies Program Element Leader for High-Intensity Laser High Energy Density Science at the Lawrence Livermore National Laboratory in the U.S. This group pioneers use of the highest intensity lasers in the world to investigate novel states of matter, generate energetic beams of particles, study laboratory astrophysics, and explore fusion physics. Tammy received her B.S. (2005) from Caltech, then M.S. (2008) and Ph.D. (2010) from UC San Diego. She has authored or co-authored over 180 refereed journal publications, and currently sits on the Fusion Energy Sciences Advisory Committee (FESAC), providing advice to the U.S. Department of Energy’s Office of Science on complex scientific and technological issues related to fusion energy and plasma research. She is the recipient of a Presidential Early Career Award for Science and Engineering (PECASE), a DOE Early Career Research Award, and the 2021 Excellence in Fusion Engineering Award from the Fusion Power Associates.

Wentao Wang

中国上海光機研究所

Theme:”Free-electron lasing at 27 nm based on a laser wakefield accelerator at SIOM”

00:00 – 00:00

Abstract

Free-electron lasing at 27 nm based on a laser wakefield accelerator at SIOM

X-ray free-electron lasers can generate intense and coherent radiation at wavelengths down to the sub-ångström region, and have become indispensable tools for applications in structural biology and chemistry, among other disciplines. Several X-ray free-electron laser facilities are in operation; however, their requirement for large, high-cost, state-of-the-art radio-frequency accelerators has led to great interest in the development of compact and economical accelerators. Laser wakefield accelerators can sustain accelerating gradients more than three orders of magnitude higher than those of radio-frequency accelerators, and are regarded as an attractive option for driving compact X-ray free-electron lasers. However, the realization of such devices remains a challenge owing to the relatively poor quality of electron beams that are based on a laser wakefield accelerator. After ten years of efforts, Prof. Ruxin Li’s research team present an experimental demonstration of undulator radiation amplification in the exponential-gain regime by using electron beams based on a laser wakefield accelerator. The amplified undulator radiation, which is typically centred at 27 nanometres and has a maximum photon number of around 1010 per shot, yields a maximum radiation energy of about 150 nanojoules. The results constitute a proof-of-principle demonstration of free-electron lasing using a laser wakefield accelerator, and pave the way towards the development of compact Xray free-electron lasers based on this technology with broad applications. In future, a laboratoryscale, ultra-brilliant FEL (around 10 m in size), with the advantages of low cost (~ US$5 million), high temporal resolution (femtosecond-level), high resolution (nanometre-level), and ultra-high precision timing control (less than 1 fs), could gain popularity.

Biography

Wentao Wang is a professor of Shanghai Institute of Optics and Machinery, Chinese Academy of Sciences. His research interests include laser wakefield electron accelerator and compact radiation sources, with a preference for experimental physics. He and his colleagues have published more than 50 papers in Nature, Physical Review Letters and others. He was awarded “2016 China Optical Important Achievement Award”, “2019 Excellent Member of Youth Innovation Promotion Association, Cas” and other honors.

Professor Irina SOROKINA

ノルウェー科学技術大学

Theme:”Next generation mid-infrared lasers: a route towards sub-wavelength 3Dmanufacturing”

Abstract

Next generation mid-infrared lasers: a route towards sub-wavelength 3Dmanufacturing

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Biography

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