Advanced High Speed Optical Diagnostics
On demand | Presented Live 5 August 2021
Martin Richardson, CREOL, The College of Optics and Photonics (United States)
David Attwood, Univ. of California, Berkley (United States)
Kazuto Yamauchi, Osaka University (Japan)
Recent Progress in Precision Mirror Optics for Synchrotron-Based X-ray Microscopy
We have developed precision mirror-based hard X-ray optics for focusing XFEL to less than 50nm at SACLA and for full-field imaging at SPring-8, in both of which we have realized diffraction-limited characteristics. I will talk about these achievements together with the latest status and future prospects.
Kazuto Yamauchi has been a Professor at Osaka University since 2003 and is serving as a leader of the center of excellence for atomically controlled fabrication processes since 2008. He received PhD in 1991 from Osaka University. His working fields are precision engineering and its application to optics manufacturing especially for X-ray and high power laser optics. He is recognized to be fellows of SPIE and OSA respectively since 2017 and 2018.
Reinhard Kienberger, Technical Univ. of Munich (Germany)
Attosecond Chronoscopy on Solids
The generation of single isolated attosecond pulses in the extreme ultraviolet (XUV) together with fully synchronized few-cycle infrared (IR) laser pulses allowed to trace electronic processes on the attosecond timescales. A pump/probe technique (attsecond streaking) was used to investigate electron dynamics on surfaces and layered systems with unprecedented resolution. We were able to measure the absolute emission time of electrons upon the photoelectric effect, delays in photoemission of electrons of different species, energy-dependant delays, the influence of the band-structure or wavepacket properties on the emission time in various materials and layered systems.
Reinhard Kienberger earned his doctoral degree (2002) at Vienna University of Technology. With a scholarship awarded by the Austrian Academy of Sciences he worked as a postdoctoral researcher at the Stanford Linear Accelerator Laboratory SLAC, USA (2004). Since 2006, he led a research group at the Max Planck Institute for Quantum Optics in Garching, from 2014 to 2019 as a Max Planck Fellow. In 2008, he was appointed Professor of Experimental Physics at th Technische Universitaet Munich (TUM) in the context of the Munich Centre for Advanced Photonics (MAP) Excellence Cluster. Since 2013, Prof. Kienberger is head of the Chair of Laser and X-ray Physics at TUM.
Sabrina Nagel, Lawrence Livermore National Labs. (United States)
Dynamic X-ray detectors for High-Energy-Density
Dynamic X-ray detectors at the National Ignition Facility play a crucial role on High-Energy-Density (HED) experiments. They record data in the form of X-ray spectra, hot spot emission profiles, radiographic images, et cetera. The fast (pico- to nanoseconds) time scales and harsh environments of the HED experiments at the NIF impose tight constraints on the performance of these instruments, both in terms of temporal and spatial resolution, background rejection as well as their survivability. We are constantly striving to improve the quality of the data collected by identifying, implementing, and integrating cutting-edge technology, such as the hybridized CMOS cameras from SNL . Here we provide a summary of the how we utilize these multi-frame nanosecond cameras in our X-ray detectors for HED experiments.
1. L. Claus et al., “Design and characterization of an improved, 2 ns, multi-frame imager for the Ultra-Fast X-ray Imager (UXI) program at Sandia National Laboratories,” Proc. SPIE 9591, 95910P (2015).
Prepared by LLNL under Contract DE-AC52-07NA27344.
Sabrina Nagel earned her PhD from Imperial College London in 2009. She joined LLNL in 2011 and started working on X-ray detectors for the NIF, developing novel capabilities for taking X-ray images of inertial-confinement-fusion (ICF) experiments with unprecedented temporal resolution. In 2018 she became a group leader and the lead scientist for the NIF’s Dynamic X-ray Detectors Group. As such she works closely with engineering and operations and is a key contributor for inertial confinement fusion and high energy density science campaigns on the NIF.