A5101596596- Laser-induced spectroscopy and plasma
- Fusion materials and technologies
- Magnetic confinement fusion research
- Laser-Plasma Interactions and Diagnostics
- Atomic and Molecular Physics
- Analytical chemistry methods development
- Laser Material Processing Techniques
- Ion-surface interactions and analysis
- Superconducting Materials and Applications
- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Laser Design and Applications
- Plasma Diagnostics and Applications
- Diamond and Carbon-based Materials Research
- Mercury impact and mitigation studies
- Advancements in Photolithography Techniques
- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Ionosphere and magnetosphere dynamics
- Dust and Plasma Wave Phenomena
- Ocular and Laser Science Research
- High-pressure geophysics and materials
- Cultural Heritage Materials Analysis
- Solar and Space Plasma Dynamics
- X-ray Spectroscopy and Fluorescence Analysis
Hikma Pharmaceuticals (United Kingdom)
2025
Purdue University West Lafayette
2015-2024
Al-Azhar University
2018-2019
Czech Academy of Sciences, Institute of Plasma Physics
2014
Czech Academy of Sciences, Institute of Physics
2014
McGill University
2013
Agricultural Research Center
2012
Argonne National Laboratory
2000-2010
Office of Scientific and Technical Information
2002-2007
Energy Technology Centre
2003-2004
The major increase in discharge duration and plasma energy a next step DT fusion reactor will give rise to important plasma-material effects that critically influence its operation, safety performance. Erosion scale of several centimetres from being barely measurable at micron today's tokamaks. Tritium co-deposited with carbon strongly affect the operation machines facing components. Controlling plasma-wall interactions is critical achieving high performance present day tokamaks, this likely...
The status of the research on muon colliders is discussed and plans are outlined for future theoretical experimental studies. Besides continued work parameters a 3-4 0.5 TeV center-of-mass (CoM) energy collider, many studies now concentrating machine near 0.1 that could be factory s-channel production Higgs particles. We discuss various components in such colliders, starting from proton accelerator needed to generate pions heavy-Z target proceeding through phase rotation decay ($\pi \to \mu...
We investigated spatio-temporal evolution of ns laser ablation plumes at atmospheric pressure, a favored condition for laser-induced breakdown spectroscopy and laser-ablation inductively coupled plasma mass-spectrometry. The 1064 nm, 6 pulses from Nd:YAG were focused on to an Al target the generated was allowed expand in 1 atm Ar. hydrodynamic expansion features studied using shadowgraphy gated 2 self-emission visible imaging. Shadowgram images showed material ejection generation shock...
The influence of ambient pressure on the spectral emission features and expansion dynamics a plasma plume generated metal target has been investigated. plumes were by irradiating Cu targets using 6 ns, 1064 nm pulses from Q-switched Nd:YAG laser. studied varying air levels ranging vacuum to atmospheric pressure. found affect both line intensities broadening along with signal background noise ratios optimum conditions for analytical applications evaluated. characteristic parameters estimated...
We investigated the role of excitation laser wavelength on plasma generation and expansion confinement ablation plumes at early times (0–500 ns) in presence atmospheric pressure. Fundamental, second, fourth harmonic radiation from Nd:YAG was focused Al target to produce plasma. Shadowgraphy, fast photography, optical emission spectroscopy were employed analyze plumes, white light interferometry used characterize craters. Our results indicated that plays a crucial laser-target laser-plasma...
We investigated the spatial and temporal evolution of temperature electron density associated with femto- nanosecond laser-produced plasmas (LPP) from brass under similar laser fluence conditions. For producing plasmas, targets were ablated in vacuum employing pulses either a Ti:Sapphire ultrafast (40 fs, 800 nm) or Nd:YAG (6 ns, 1064 nm). Optical emission spectroscopy is used to infer plasmas. The (ne) was estimated using Stark broadened profiles isolated lines while excitation (Texc)...
We describe the status of our effort to realize a first neutrino factory and progress made in understanding problems associated with collection cooling muons towards that end. summarize physics can be done factories as well intense cold beams muons. The potential muon colliders is reviewed, both Higgs Factories compact high energy lepton colliders. timescale research development reviewed latest designs channels including promise ring coolers achieving longitudinal transverse simultaneously....
We investigated the effect of excitation wavelength on density evolution laser-produced tin plasmas, both experimentally and numerically. For producing Sn targets were excited with either 10.6 μm CO2 laser or 1.06 Nd:yttrium aluminum garnet laser; are considered to be potential lasers for extreme ultraviolet lithography plasma light sources. The electron during isothermal expansion regime was estimated using an interferometric technique. Stark broadening isolated singly-ionized emission...
We investigated the angular distribution of ions and atoms emanating from femto- nanosecond laser-produced metal plasmas under similar laser fluence conditions. For producing plasmas, aluminum targets are ablated in vacuum employing pulses a Ti:Sapphire ultrafast (40 fs, 800 nm) an Nd:YAG (6 ns, 1064 nm). The ion emission as well kinetic energy is characterized by Faraday cup, while quartz microbalance used for evaluating deposited mass. mass features showed that fs produced higher more per...
We investigated ion emission dynamics of laser-produced plasma from several elements, comprised metals and non-metals (C, Al, Si, Cu, Mo, Ta, W), under vacuum conditions using a Faraday cup. The estimated flux for various targets studied showed decreasing tendency with increasing atomic mass. For metals, the is found to be function sublimation energy. A comparison temporal profiles materials only high-Z elements exhibited multiple structures in time flight profile indicated by observation...
Ultrafast laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has gained prominence in recent times owing to its superior capabilities eliminating fractionation effects providing the possibility of developing a non-matrix matched calibration system. Though ultrafast sample introduction provides better accuracy and precision compared long-pulse nanosecond lasers, fundamental mechanisms using femtosecond lasers are still not clearly understood. In this study, role spot...
Research on the National Spherical Torus Experiment, NSTX, targets physics understanding needed for extrapolation to a steady-state ST Fusion Nuclear Science Facility, pilot plant, or DEMO. The unique operational space is leveraged test theories next-step tokamak operation, including ITER. Present research also examines implications coming device upgrade, NSTX-U. An energy confinement time, τE, scaling unified varied wall conditions exhibits strong improvement of BTτE with decreased electron...
We investigated the role of ambient gas pressure on expansion and emission features during ultrafast laser ablation metal target. Plasma plumes were generated using 800 nm, 40 fs pulses a copper target air was varied more than seven orders (1 × 10−5 – 760 Torr) magnitude. Fast-gated images showed complex interaction between plume leading to changes in geometry with as well time. The levels are found affect both line intensities broadening along signal noise (S/N) background (S/B) ratios....
Abstract Background Inflammatory Bowel Disease (IBD) is a chronic condition with increasing incidence, particularly in newly industrialized countries. The high cost of biologic treatments has led to the development biosimilars like infliximab CT-P13, which offer more affordable alternative. This study aims evaluate safety and effectiveness biosimilar (CT-P13) Saudi Arabian patients Crohn’s (CD), fistulizing perianal CD, or ulcerative colitis (UC). Methods A non-interventional, observational...
We have investigated the spot size effects on extreme ultraviolet conversion efficiency (CE) of CO2 laser-produced Sn plasmas. The estimated CE laser to 13.5 nm radiation, within a 2% bandwidth, using 10.6 μm with various pulse widths (25–55 ns) showed double hump structure during target-lens scan, where is nearly 25% lower at best focal position. Density analysis plasma steep density gradients position, and reduction in which explained by lack efficient coupling between plasma.
Plasma expansion with shockwave formation during laser ablation of materials in a background gasses is complex process. The spatial and temporal evolution pressure, temperature, density, velocity fields needed for its complete understanding. We have studied the femtosecond (fs) laser-ablated aluminum (Al) plumes Argon (Ar) gas at 0.5 1 atmosphere (atm). plume investigated experimentally using shadowgraphy fast-gated imaging. computational fluid dynamics (CFD) modeling also carried out....
We studied Extreme Ultra-Violet (EUV) emission characteristics of the 13.5 nm wavelength from CO2 laser-irradiated pre-formed tin plasmas using 2D radiation hydrodynamic simulations. Our results indicate that when a laser irradiates plasma, heated plasma expands towards surrounding steepening density at ablation front and lowering near axis due to transverse motion plasma. Consequently, absorption fraction decreases, contribution EUV output becomes dominant over low-density plasmas....