A5082828033- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Advanced X-ray Imaging Techniques
- Advanced Fiber Laser Technologies
- Nuclear Physics and Applications
- Laser Design and Applications
- Laser-induced spectroscopy and plasma
- Digital Holography and Microscopy
- Advanced Electron Microscopy Techniques and Applications
- Laser Material Processing Techniques
- Radiomics and Machine Learning in Medical Imaging
- High-pressure geophysics and materials
- Medical Imaging Techniques and Applications
- Fusion materials and technologies
- Aerogels and thermal insulation
- Crystallography and Radiation Phenomena
- X-ray Diffraction in Crystallography
- Advanced Fluorescence Microscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Photorefractive and Nonlinear Optics
- Cultural Heritage Materials Analysis
- Advanced Optical Sensing Technologies
- Ocular and Laser Science Research
- Atomic and Molecular Physics
- Advanced Surface Polishing Techniques
Sandia National Laboratories
2018-2024
Sandia National Laboratories California
2018-2022
University of Colorado Boulder
2016-2018
Joint Institute for Laboratory Astrophysics
2014-2018
University of Colorado System
2015
National Institute of Standards and Technology
2011-2014
Optica
2011
Colorado School of Mines
2011
Pulsed power accelerators compress electrical energy in space and time to provide versatile experimental platforms for high density inertial confinement fusion science. The 80-TW “Z” pulsed facility at Sandia National Laboratories is the largest device world today. Z discharges up 22 MJ of stored its capacitor banks into a current pulse that rises 100 ns peaks as 30 MA low-inductance cylindrical targets. Considerable progress has been made over past 15 years use precision scientific tool....
Recent advances in high-order harmonic generation have made it possible to use a tabletop-scale setup produce spatially and temporally coherent beams of light with bandwidth spanning 12 octaves, from the ultraviolet up x-ray photon energies >1.6 keV. Here we demonstrate this for x-ray-absorption spectroscopy at K- L-absorption edges solids near 1 We also report water window spectral region (284–543 eV) using high flux supercontinuum 109 photons/s 1% bandwidth, 3 orders magnitude larger than...
Abstract We present an overview of the magneto-inertial fusion (MIF) concept Magnetized Liner Inertial Fusion (MagLIF) pursued at Sandia National Laboratories and review some most prominent results since initial experiments in 2013. In MagLIF, a centimeter-scale beryllium tube or ‘liner’ is filled with fuel, axially pre-magnetized, laser pre-heated, finally imploded using up to 20 MA from Z machine. All these elements are necessary generate thermonuclear plasma: preheating raises temperature...
We report on a series of Magnetized Liner Inertial Fusion (MagLIF) experiments conducted the Z pulsed power facility that utilized high aspect ratio (ratio outer radius to wall thickness) liners with dielectric coatings and low-mix laser preheat configurations. The consisted an 10.6 beryllium tube coated 75 μm epoxy outside have been shown maintain better implosion stability than uncoated demonstrated consistent stagnation performances in previous [Ampleford et al., Phys. Plasmas 31, 022703...
We report on progress implementing and testing cryogenically cooled platforms for Magnetized Liner Inertial Fusion (MagLIF) experiments. Two experimental were developed: an integrated platform fielded the Z pulsed power generator that combines magnetization, laser preheat, pulsed-power-driven fuel compression a laser-only in separate chamber enables measurements of preheat energy using shadowgraphy measurements. The experiments suggest ∼89% ± 10% incident is coupled to targets across range...
We present a semi-classical study of the effects Lorentz force on electrons during high harmonic generation in soft and hard X-ray regions driven by near- mid-infrared lasers with wavelengths from 0.8 to 20 μm, at intensities below 1015 W/cm2. The transverse extent longitudinal drift is compared for both Gaussian focus waveguide geometries. Both geometries exhibit electric field component that cancels magnetic some focus, once each full optical cycle. show contributes super-Gaussian scaling...
Purpose: The authors investigate the extent to which Response Evaluation Criteria in Solid Tumors (RECIST) can predict tumor volumes ideal geometric settings and using clinical data. Methods: consider a hierarchy of models including uniaxial ellipsoids, general composites both analytical numerical techniques show how well RECIST each case. have certain features that are compared Results: principal conclusion is change reported value needs be factor at least 1.2 achieve 95% confidence one...
The interaction of intense mid-infrared laser fields with atoms and molecules leads to a range new opportunities, from the production bright, coherent radiation in soft x-ray imaging molecular structures dynamics attosecond temporal sub-angstrom spatial resolution. However, all these effects, which rely on laser-driven recollision an electron removed by strong field parent ion, suffer rapidly increasing role magnetic component driving pulse: associated Lorentz force pushes electrons off...
X-ray diffraction measurements to characterize phase transitions of dynamically compressed high-Z matter at Mbar pressures require both sufficient photon energy and fluence create data with high fidelity in a single shot. Large-scale laser systems can be used generate x-ray sources above 10 keV utilizing line radiation mid-Z elements. However, the laser-to-x-ray conversion efficiency these energies is low, thermal x-rays or hot electrons result unwanted background. We employ polycapillary...
We present a method using spectral interferometry (SI) to characterize pulse in the presence of an incoherent background such as amplified spontaneous emission (ASE). The output regenerative amplifier is interfered with copy that has been converted third-order cross-polarized wave generation (XPW). ASE shows pedestal interference pattern. energy contrast between short-pulse component and retrieved. spectra interacting beams are obtained through improvement self-referenced (SRSI) analysis.
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text M. -. Chen, C. Mancuso, Hernández-García, F. Dollar, B. Galloway, D. Popmintchev, P. Huang, Walker, L. Plaja, A. Jaron-Becker, Becker, Murnane, H. Kapteyn, and T. "Generation of Bright Isolated Attosecond Soft X-Ray Pulses Driven by Multi-Cycle Mid-Infrared Lasers," in Frontiers Optics 2014, OSA Technical Digest (online) (Optical Society America, 2014), paper LW1H.1....
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text C. Mancuso, M. -. Chen, Hernández-García, F. Dollar, B. Galloway, D. Popmintchev, Langdon, A. Auger, P. Huang, Walker, L. Plaja, Jaron-Becker, Becker, Murnane, H. Kapteyn, and T. "Generation of Bright Isolated Attosecond Soft X-Ray Pulses Driven by Multi-Cycle Mid-Infrared Lasers," in CLEO: 2014, OSA Technical Digest (online) (Optica Publishing Group, 2014), paper...
RECIST (Response Evaluation Criteria in Solid Tumors) is a linear measure intended to predict tumor size medical computed tomography (CT). In this work, using purely geometrical considerations, we estimate how well can the volume of randomly-oriented models, each composed union ellipsoids. The principal conclusion that likely work less for realistic tumors than
Dichroic coatings have been developed for high transmission at 527 nm and reflection 1054 laser operations in the nanosecond pulse regime. The consist of HfO<sub>2</sub> SiO<sub>2</sub> layers deposited with e-beam evaporation, laser-induced damage thresholds as 12.5 J/cm<sup>2</sup> were measured 532 3.5 ns pulses (22.5 degrees angle incidence, S-polarization). However, measurements single wavelength do not adequately characterize resistance these coatings, since they designed to operate...
We demonstrate a record sub-wavelength 12.6nm spatial resolution for EUV imaging using 13.5nm illumination from high-harmonic light source. Modulus enforced probe ptychographic coherent diffractive allows large-field quantitative of near-periodic objects.
At the Z Facility at Sandia National Laboratories, magnetized liner inertial fusion (MagLIF) program aims to study confinement in deuterium-filled gas cells by implementing a three-step process on fuel: premagnetization, laser preheat, and Z-pinch compression. In preheat stage, Z-Beamlet focuses through thin polyimide window enter cell heat fuel. However, it is known that presence of few μm thick reduces amount energy enters causes material mix into These effects are detrimental achieving...
EUV lithography is promising for addressing upcoming, <10nm nodes the semiconductor industry, but with this promise comes need reliable metrology techniques. In particular, there a actinic mask inspection in which imaging wavelength matches that of intended process, so most relevant defects are detected. Here, we demonstrate tabletop, ptychographic, coherent diffraction (CDI) reflection- and transmission-modes extended samples, using 13 nm high harmonic generation (HHG) source. We achieve...
By combining tabletop 13.5nm high-harmonic EUV beams with novel ptychography reconstruction algorithms, we demonstrate diffraction-limit high-NA and sub-wavelength resolution imaging at wavelengths for the first time, representing a record full-field light-based microscopy.
Diagnostics in high energy density physics, shock and related fields are primarily driven by a need to record rapidly time-evolving signals single-shot events. These measurements often limited channel count signal degradation issues on cable links between the detector digitizer. We present Ultrafast Pixel Array Camera (UPAC), compact flexible readout system with 32 waveform-recording channels at up 10 Gsample/s 1.8 GHz analog bandwidth. The footprint allows UPAC be directly embedded...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text M. -. Chen, C. Mancuso, Hernández-García, F. Dollar, B. Galloway, D. Popmintchev, Langdon, A. Auger, P. Huang, Walker, L. Plaja, Jaron-Becker, Becker, Murnane, H. Kapteyn, and T. "Generation of Bright Isolated Attosecond Soft X-Ray Pulses Driven by Multi-Cycle Mid-Infrared Lasers," in 19th International Conference Ultrafast Phenomena, OSA Technical Digest (online)...
We model soft x-ray high harmonic generation and propagation driven by mid-infrared lasers. find that multi-cycle laser pulses are ideal for generating shorter bright isolated attosecond via time-gated phase-matching in high-density extended media.
We demonstrate a record near-wavelength limited 17.5nm spatial resolution for EUV imaging using ptychographic coherent diffractive with illumination at 13.5nm from high-harmonic light source.