A5080086426- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Laser-induced spectroscopy and plasma
- Laser Design and Applications
- Gyrotron and Vacuum Electronics Research
- Nuclear Physics and Applications
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Terahertz technology and applications
- Particle Accelerators and Free-Electron Lasers
- Muon and positron interactions and applications
- Water Quality Monitoring and Analysis
- Advanced Fiber Laser Technologies
- Radiation Effects and Dosimetry
- Advanced Optical Sensing Technologies
- Optical Systems and Laser Technology
- Advanced X-ray Imaging Techniques
- Superconducting and THz Device Technology
- Privacy-Preserving Technologies in Data
- Mass Spectrometry Techniques and Applications
- COVID-19 Digital Contact Tracing
- Radiation Therapy and Dosimetry
- Polymer Nanocomposite Synthesis and Irradiation
National Institute for Laser Plasma and Radiation Physics
2012-2024
Extreme Light Infrastructure - Nuclear Physics
2022-2024
TRIUMF
1998-2023
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2022-2023
University of Bucharest
2015-2017
Université Paris-Sud
2014-2015
Laboratoire de Physique des Gaz et des Plasmas
2015
Centre National de la Recherche Scientifique
2015
Institutul de Fizică Atomică
1992-2007
Thin-film compression (TFC) and the focusability of high-power laser pulses after self-phase modulation in thin films at transport intensities (∼1 TW/cm2) for petawatt systems is demonstrated. High-energy (∼296 mJ) are compressed from ∼55 fs to ∼31 fs. Additionally, (∼45–55 TW) flat-top spectral broadening found be largely maintained, showing only modest decreases energy contained central part focal spot. In light these findings, TFC offers a method moving toward single-cycle pulse durations...
A possibility of using self-phase modulation and cascaded quadratic nonlinearity effects for the enhancement temporal intensity profile is analysed theoretically in application to petawatt pulses at a kJ energy level. Preliminary experiments CETAL laser facility demonstrate reduction pulse duration from 46 fs down 29 by effect consequent spectral phase correction. These efficient methods offer an opportunity economically enhance existing intensities broader range high-intensity physics...
Abstract Radiation delivery at ultrahigh dose rates (UHDRs) has potential for use as a new anticancer therapeutic strategy. The FLASH effect induced by UHDR irradiation been shown to maintain antitumour efficacy with reduction in normal tissue toxicity; however, the difficult demonstrate vitro. objective vitro is challenging, aiming reveal differential response between cancer and cells further identify cell molecular mechanisms. New high-intensity petawatt laser-driven accelerators can...
The off-line ion source (OLIS) terminal consists of a microwave cusp source, either surface or hybrid surface-arc discharge and an electrostatic switch that allows selecting any one the sources without mechanical intervention. These provide variety beams to ISAC experiments, for commissioning accelerators, setting up radioactive tuning beam lines. has been operational since 1995 provides singly doubly charged from various stable isotopes many experiments at high low energy areas. Originally...
High-power pulsed lasers are used more and as tools for particle acceleration. Characterization of the accelerated particles in real-time monitoring electromagnetic pulses (EMPs) during acceleration critical challenges laser experiments. Here, we CETAL-PW facility at NILPRP from different thin metallic targets, intensities order 3×1021 W/cm2. We investigated dependence EMP amplitude (EMPA) electrons’ maximal energy (AEME), on thickness, resistivity, atomic number target. have found a...
A pump scheme with one long and two short pulses is proposed, in a grazing incidence pumping x-ray laser (XRL) configuration. 360 ps pulse, prepares plasma low charge state. Then, an initial pulse ionizes the to optimal state, while second induces strong collisional excitation gain region. With only 200 mJ of energy on target, compact Ag XRL at 13.9 nm coefficient 55 cm(-1) was achieved.
An alternative, novel multiple pulse generation scheme was implemented directly after the optical compressor output of an x-ray pump laser. The new method uses a polarization sensitive thin film beam splitter and half-wavelength wave plate for tuning energy ratio in short pulses. Based on this method, extensive study made running parameters grazing incidence pumped silver laser (XRL) with long 145 mJ 6 ns at 532 nm up to 1.45 J few picoseconds 810 nm. Fivefold enhancement emission XRL...
Harmonic seeded operation of a neon-like titanium plasma-based soft x-ray laser is described. The plasma amplifier pumped with variation the grazing incidence technique involving fast and localized ionization step. We discuss its effect on gain dynamics by measuring amplifying factor as function delay between pump pulse harmonic seed. Two different regimes are pointed out, following pumping scheme used. For one them, in generation compared observed.
We have investigated a new scheme for laser plasma transient collisional soft x-ray lasers based on the use of an additional to produce preplasma. Soft emission measurements made different solid targets are presented and discussed. A significant enhancement SXRL as compared double-pulse single-beam grazing incidence (DGRIP) using same pump is reported 13.9- 32.6-nm wavelengths.
Two methods for multiple high energetic THz pulse generation by two-color filamentation in air with controllable energy ratio and delay ranging from one to hundreds of ps were investigated. In the first method laser is split into two inside optical stretcher a CPA system, resulting consecutive filaments occur same region allows study influence plasma filament on emission delayed filament. Based polarization sensitive thin film beam splitter placed front 45° mirror, second produces parallel...
The thin-film post-compression technique has the ability to reduce pulse duration in PW-class lasers, increasing peak power. Here, nonlinear response of an increasingly available optical thermoplastic demonstrates enhanced spectral broadening, with corresponding shorter compared fused silica glass. can be used close its damage threshold when refreshed using a roller mechanism, and total amount material varied by folding film. As proof-of-principle demonstration scalable 10-PW, mechanism...
At TRIUMF, H− ion sources have been characterized on a teststand to improve the understanding of their performance. Measured beam characteristics such as current, emittance, and e∕H− ratio were correlated with source conditions function relevant plasma parameters. Plasma densities, temperatures, potentials measured Langmuir probe properties for different confining magnetic fields values arc power gas pressure. The mechanism extraction was studied by correlating potential profiles...
Femtosecond laser pulses with λ = 800 nm were focused in air at one atmosphere and deuterium (D) low pressure. Submicron periodic structures observed on surfaces made of Be, W a mixture Be-W immersed these gases placed nearly parallel the beam, 300 μm from focal spot. In air, no Be. For mixture, uniform when formed D but irregular air. this last case striations organized into small patches 1 to 2 size.
Abstract Radiation delivery at ultra-high dose rates (UHDRs) demonstrated its potential to be used as a new anti-cancer therapeutic strategy. The FLASH effect induced by UHDR irradiation was shown maintain anti-tumor efficacy while reducing normal tissue toxicity that limits the use of conventional radiotherapy, however, difficult demonstrate in vitro . high-intensity petawatt laser-driven accelerators can deliver very high energy electrons (VHEE) 10 13 Gy/s short pulses (10 − s). We present...
A double plasma-mirror (DPM) system including reflective spherical optics in a telescope configuration is implemented to adapt the focal spot size of multi-Petawatt (PW) laser beam resulting intensity adjustability. The optimized minimize aberrations at plane, which ensures high-quality spot. dedicated imaging used evaluate focus quality and measure total reflectivity DPM multi-PW-level. Temporal contrast enhancement reflected additionally demonstrated, as evidenced by higher particle yield...
A double plasma-mirror (DPM) system including reflective spherical optics in a telescope configuration is implemented to adapt the focal spot size of multi-Petawatt (PW) laser beam resulting intensity adjustability. The optimized minimize aberrations at plane, which ensures high-quality spot. dedicated imaging used evaluate focus quality and measure total reflectivity DPM multi-PW-level. Temporal contrast enhancement reflected additionally demonstrated, as evidenced by higher particle yield...
A double plasma-mirror (DPM) system including reflective spherical optics in a telescope configuration is implemented to adapt the focal spot size of multi-Petawatt (PW) laser beam resulting intensity adjustability. The optimized minimize aberrations at plane, which ensures high-quality spot. dedicated imaging used evaluate focus quality and measure total reflectivity DPM multi-PW-level. Temporal contrast enhancement reflected additionally demonstrated, as evidenced by higher particle yield...
Abstract We are showing a significant enhancement in the temporal contrast by reducing coherent noise of 10 PW laser system at Extreme Light Infrastructure - Nuclear Physics facility. The was improved four orders magnitude picoseconds and more than one order 50 before main peak. This improvement picosecond is critical for experiments using thin solid targets.
Development of efficient soft x-ray laser plasma amplifiers adapted to seeded operation, requires a better control over amplifier transverse spatial extent, brilliance and gain lifetime. Here it is shown that pumping the with one long two short pump pulses (1L2S) provides advantages in terms for specified parameters case Ni-like Ag laser. Also, significant tunability lifetime 1L2S scheme Ne-like Ti observed. Direct harmonics seeding chirped amplification approaches may benefit from lifetime,...
Abstract Negative ions compact cyclotrons serve many applications and are known to be effective due their simple efficient extraction as well the large circulating currents without requirement of separated turns. TR30s that have continued experience impressive technological advances over last few decades, driven primarily by medical isotope production needs. Their space charge limits in range 1 2 mA, we explored combination our machines' age challenges maintaining performances. Certain...
An ECR ion source is converted to produce a beryllium fluoride beam, which will be stripped Be+27 beam and used in Be7(p,γ)8B experiments at ISAC. The consists of an injection chemical chamber plasma chamber. Chemically purified (99.9%) BeO placed the can heated up 1000 °C. A CF4 leak connected that serves as for reaction BeF2. BeF2 then injected into hot electron layer region enhance ionization efficiency. detailed description, parameters efficiency measurements are presented this paper.