A5075633906- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Ion-surface interactions and analysis
- Plasma Diagnostics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Diamond and Carbon-based Materials Research
- Advanced X-ray Imaging Techniques
- Silicon and Solar Cell Technologies
- Electron and X-Ray Spectroscopy Techniques
- Plasma and Flow Control in Aerodynamics
- Pulsed Power Technology Applications
- Dust and Plasma Wave Phenomena
- Advancements in Semiconductor Devices and Circuit Design
- Integrated Circuits and Semiconductor Failure Analysis
- Carbon Nanotubes in Composites
- Semiconductor Quantum Structures and Devices
- Terahertz technology and applications
- Near-Field Optical Microscopy
- Metal and Thin Film Mechanics
- Electrostatic Discharge in Electronics
- Ionosphere and magnetosphere dynamics
- Magnetic confinement fusion research
- Advanced Surface Polishing Techniques
Pontificia Universidad Católica de Chile
2015-2020
Talbot-Lau X-ray deflectometry (TXD) has been developed as an electron density diagnostic for High Energy Density (HED) plasmas. The technique can deliver x-ray refraction, attenuation, elemental composition, and scatter information from a single Moiré image. An 8 keV interferometer was deployed using laser x-pinch backlighters. Grating survival mapping were demonstrated 25–29 J, 8–30 ps pulses copper foil targets. pattern formation grating also observed driven at 400 kA, ∼1 kA/ns. These...
The dynamics of ablation streams and precursor plasma in cylindrical wire array Z-pinches under temporal variations the global magnetic field topology is investigated through experiments numerical simulations. arrays these are modified by replacing a pair consecutive wires with larger diameter. This modification leads to two separate effects, both which impact plasma; firstly, current unevenly distributed between secondly, thicker take longer fully ablate. uneven distribution evidenced drift...
A series of experimental measurements fast ions generated in a tungsten conical wire array are presented. The detected using set negatively biased Faraday cups located on axis above the at distances between 10 and 67 cm. Significant differences signals from probes found varying background atmospheric pressure 10−2 10−5 Torr. At Torr, pulse moving 106 m/s is collected by cups. In contrast, intermediate (10−4 Torr) high (10−2 pressures, both electrons with velocity order m/s. ascribed to...
Preliminary results on the latest experiments regarding plasma outflows from different wire-based z-pinch configurations performed in Llampudken generator (∼350kA ∼350ns) are presented. These produced three experiments: cylindrical, conical and nested arrays. Our show that it is indeed possible to produce moderate size pulsed power drivers with currents of some hundreds kiloamperes. Each one studied here can a dense outflow characterized by its own set dimensionless parameters; such as...
We present preliminary experimental observations of the plasma dynamics laser produced annular plasmas, expanding freely in a 80 mTorr Argon background. A Nd:YAG laser, 340 mJ, 3.5 ns, at 1.06 µm, operating 10 Hz, is used experiments. To produce pulse focused on titanium target using combination axicon and convergent lens. The characterized by 50 ns time resolved imaging visible emission. inwards radial expansion initial ring result on-axis stagnation, giving rise to an axial plume....
A novel application for conical wire array Z-pinches to surface science is presented. The axial outflows emitted by a tungsten in the form of both dense plasma jet and energetic ions are used produce morphological modification substrate surfaces without using any kind chemical treatment. In particular, modifications (1 0 0) oriented Si substrates micropores stripes-like formations after single interaction obtained. It found that prevalence each formation, either or stripes, on treated...
The use of copper x-pinch plasmas as backlighting source for radiographing insects is described. experiments 4x 25µm Cu wires driven by a ∼400kA, ∼350ns current pulse to produce localized soft x-rays in the micrometer range. Both size and energy range photons produced enable imaging low contrast objects such rich inner structures with excellent spatial resolution. technique used three different insects: moth, fly beetle. These radiographies allow clear observation details outer (e.g., wings)...
Talbot-Lau X-ray Deflectometry (TXD) has been developed as an electron density diagnostic for High Energy Density (HED) plasmas. The delivers refraction, attenuation, elemental composition, and scatter information from a single-shot Moire image. A interferometer was benchmarked using laser-target X-pinch x-ray backlighters. Grating survival mapping were demonstrated for: a) 25–60 J, 8–30 ps laser pulses copper targets b) X-pinches driven by ~350kA/350ns generator. X -ray backlighter quality...
Negatively biased Faraday cups are used to detect fast traveling particles emitted by a tungsten conical wire array in the axial direction. The is composed 16 equally spaced (W) wires of 25 <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mu \mathrm{m}$</tex> each as load pulsed power driver. Also, dynamics monitored using UV/XUV imaging self-emission plasma side-on experiments performed Llampudken1 generator which delivers ~ 350 kA in~ ns at...