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Tytuł:
Verify the plasma parameters generated from the Tin material using the laser-induced plasma technique
Autorzy:
Ahmed, Baida M.
Aadim, Kadhim A.
Khalaf, Madyan A.
Powiązania:
https://bibliotekanauki.pl/articles/1030607.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Laser-Induced Plasma (LIP)
Nd:YAG laser
Optical Emission Spectroscopic (OES)
Tin (Sn)
Opis:
In this work, A spectroscopic research on laser-produced tin plasma using optical emission spectroscopy (OES) technology is provided. Laser-induced Sn plasma produced at various laser energy has also been defined by visible emission spectroscopy. Plasma is created by a solid tin object radiated by a pulsed laser in a room environment. A Nd:YAG laser pulse 9 ns in duration with wavelength of 1064 nm and a focal length of 10 cm in the range of energy 500-800 mJ is used to generate plasma from a planar Sn sample. The electron temperature (Te) was calculated in ratio line intensities method, while the electron density (ne) was calculated using Saha-Boltzmann equation, also another plasma parameters was calculated such as plasma (fp), Debye length (λD) and Debye number (ND). The increase in electron temperature and density was observed as a function of laser energies. Measurement of the production of the electron temperature in the rang 0.926-0.952 eV, While the electron density is in the rang (1.9×1015-2.5×1015) cm-3.
Źródło:
World Scientific News; 2020, 144; 326-337
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The source of X-rays and high-charged ions based on moderate power vacuum discharge with laser triggering
Autorzy:
Alkhimova, M. A.
Vovchenko, E. V.
Melekhov, A. P.
Ramakoti, R. S.
Savelov, A. S.
Krapiva, P. S.
Moskalenko, I. N.
Powiązania:
https://bibliotekanauki.pl/articles/146864.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
laser-triggered vacuum discharge
sources of X-rays
ion composition of plasma
Opis:
The source of X-ray radiation with the energy of quanta that may vary in the range hv = 1÷12 keV was developed for studies in X-ray interaction with matter and modifi cation of solid surfaces. It was based on a vacuum spark discharge with the laser triggering. It was shown in our experiments that there is a possibility to adjust X-ray radiation spectrum by changing the confi guration of the electrode system when the energy stored in the capacitor is varied within the range of 1÷17 J. A comprehensive study of X-ray imaging and quanta energy was carried out. These experiments were carried out for the case of both direct and reverse polarity of the voltage on the electrodes. Additionally, ion composition of plasma created in a laser-triggered vacuum discharge was analyzed. Highly charged ions Zn(+21), Cu(+20) and Fe(+18) were observed.
Źródło:
Nukleonika; 2015, 60, 2; 221-227
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser nuclear fusion: current status, challenges and prospect
Autorzy:
Badziak, J.
Powiązania:
https://bibliotekanauki.pl/articles/201663.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
laser
plasma
inertial fusion
laser acceleration
Opis:
In 2009, in Lawrence Livermore National Laboratory, USA, National Ignition Facility (NIF) - the largest thermonuclear fusion device ever made was launched. Its main part is a multi-beam laser whose energy in nanosecond pulse exceeds 1MJ (106 J). Its task is to compress DT fuel to the density over a few thousand times higher than that of solid-state DT and heat it to 100 millions of K degrees. In this case, the process of fuel compression and heating is realized in an indirect way - laser radiation (in UV range) is converted in the so-called hohlraum (1 cm cylinder with a spherical DT pellet inside) into very intense soft X radiation symmetrically illuminating DT pellet. For the first time ever, the fusion device's energetic parameters are sufficient for the achieving the ignition and self-sustained burn of thermonuclear fuel on a scale allowing for the generation of energy far bigger than that delivered to the fuel. The main purpose of the current experimental campaign on NIF is bringing about, within the next two-three years, a controlled thermonuclear 'big bang' in which the fusion energy will exceed the energy delivered by the laser at least ten times. The expected 'big bang' would be the culmination of fifty years of international efforts aiming at demonstrating both physical and technical feasibility of generating, in a controlled way, the energy from nuclear fusion in inertial confined plasma and would pave the way for practical realization of the laser-driven thermonuclear reactor. This paper briefly reviews the basic current concepts of laser fusion and main problems and challenges facing the research community dealing with this field. In particular, the conventional, central hot spot ignition approach to laser fusion is discussed together with the more recent ones - fast ignition, shock ignition and impact ignition fusion. The research projects directed towards building an experimental laser-driven thermonuclear reactor are presented as well.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 729-738
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface Modification of Solids by Extreme Ultraviolet and Plasma Treatment
Autorzy:
Bartnik, A.
Fiedorowicz, H.
Skrzeczanowski, W.
Czwartos, J.
Wachulak, P.
Jarocki, R.
Kostecki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1030617.pdf
Data publikacji:
2018-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
laser plasma
photoionized plasma
surface treatment
nanostructures
Opis:
In this paper, results of surface modification, using a laser-produced plasma source of extreme ultraviolet, and the extreme ultraviolet induced low temperature plasmas, are presented. It was shown that irradiation of different materials by intense extreme ultraviolet pulses results in strong changes of the surface morphology. Examples of micro- and nanostructures obtained this way are presented. It was also demonstrated that a dual action of the radiation pulses and low temperature plasmas allows to modify a molecular structure of exposed materials.
Źródło:
Acta Physica Polonica A; 2018, 133, 2; 267-270
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on fast electron transport in the context of fast ignition
Autorzy:
Batani, D.
Powiązania:
https://bibliotekanauki.pl/articles/146597.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
inertial confinement fusion (ICF)
fast ignition (FI)
fast electrons
ultra-high-intensity lasers
relativistic laser-plasma interaction
Opis:
This paper deals with the problem of fast electron propagation in plasmas, in the context of the fast ignition (FI) approach to inertial confinement fusion (ICF). In FI, a short-pulse high-intensity laser beam should generate a beam of relativistic electrons, which propagate into the compressed pellet, depositing energy and igniting the fuel. The study of electron propagation in dense matter is hence essential to the success of this scheme. The propagation of relativistic electrons in dense matter is determined by collisions of fast electrons with ions and electrons in the material, which can be described in terms of stopping power, but it also depends on self-generated magnetic and electric fields, which play a major, or even dominant role. In this paper we will show the importance of such collective effects by discussing several experimental examples.
Źródło:
Nukleonika; 2011, 56, 2; 99-106
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-similar solution of laser-produced plasma expansion into vacuum with kappa-distributed electrons
Autorzy:
Bennaceur-Doumaz, D.
Bara, D.
Powiązania:
https://bibliotekanauki.pl/articles/146601.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
kappa distribution function
laser-produced plasmas
nonthermal electrons
plasma expansion
self-similar solution
Opis:
The expansion of semi-infi nite laser produced plasma into vacuum is analyzed with a hydrodynamic model for cold ions assuming electrons modeled by a kappa-type distribution. Self-similar analytic expressions for the potential, velocity, and density of the plasma have been derived. It is shown that nonthermal energetic electrons have the role of accelerating the self-similar expansion.
Źródło:
Nukleonika; 2016, 61, 2; 115-118
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Instytut Fizyki Plazmy i Laserowej Mikrosyntezy – 40 lat badań dla zrównoważonego rozwoju
The Institute of Plasma Physics and Laser Microfusion - 40 years of research for sustainable development
Autorzy:
Bielski, M.
Powiązania:
https://bibliotekanauki.pl/articles/214237.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Instytut Fizyki Plazmy i Laserowej Mikrosyntezy
fizyka plazmy
urządzenia badawcze
tematyka badań
współpraca międzynarodowa
Institute of Plasma Physics and Laser Microfusion
plasma physics
research infrastructure
fields of research
international collaboration
Opis:
W roku 2016 mija 40 rocznica założenia Instytutu Fizyki Plazmy i Laserowej Mikrosyntezy w Warszawie. Został on utworzony w dniu 1 stycznia 1976 r. celem badania różnych metod i urządzeń do wytwarzania gorącej plazmy, w których mogą zachodzić reakcje syntezy termojądrowej (fuzji) jąder izotopów wodoru (reakcje DD - deuter-deuter albo DT - deuter-tryt). Badania plazmy laserowej realizowano także we współpracy z Instytutem Fizyki Rosyjskiej Akademii Nauk - RAN Moskwie (FIAN) kierowanym przez prof. N. Basowa laureata nagrody Nobla. W 2005 r. nastąpiło podpisanie z Komisją Europejską Kontraktu Asocjacyjnego. Na jego podstawie rozpoczęła się w Polsce działalność koordynowana przez IFPiLM Asocjacja EURATOM-IFPiLM grupująca kilkanaście polskich ośrodków zajmujących się badaniami i technologiami fuzyjnymi w układach z magnetycznym utrzymaniem plazmy (MCF) tzn. w tokamakach i w stellaratorach. Rozpoczęto od podstaw opracowywanie metod diagnostycznych dla układów MCF, stosowanie technik laserowych w technologiach fuzyjnych i badania efektów oddziaływania plazma – ściana także z użyciem układu PF-1000. Dla stellaratora W7-X (w Greifswald, Niemcy) przygotowano układy do diagnostyki rentgenowskiej, a dla układu JET oryginalny detektor promieniowania X (detektor GEM). IFPiLM uczestniczy w dużym projekcie dotyczącym opracowywania koncepcji radialnej kamery neutronowej dla budowanego tokamaka ITER (w Cadarache, Francja). W IFPiLM realizowane są modelowania numeryczne plazmy w układach MCF. Sukcesywnie zwiększa się udział naukowców z IFPiLM w badaniach na dużych tokamakach w Europie (głównie na układzie JET w Culham, Wielka Brytania). W programie EURATOM jest też projekt dotyczący fuzji laserowej (IFE) realizowany w IFPiLM. Od 2014 r. europejski program fuzyjny jest koordynowany przez konsorcjum EUROfusion. Program krajowy koordynuje IFPiLM w ramach Centrum – Nowe Technologie Energetyczne (CeNTE). Obok prac dotyczących fuzji laserowej w IFPiLM prowadzone są badania oddziaływań laserów dużej mocy z materią. Większość tych prac jest wykonywana w ramach konsorcjum LaserLab-Europe realizowanych głównie w Ośrodku Badawczym PALS w Pradze (Republika Czeska). Od 2007 r. w Instytucie rozpoczęto badania i budowę plazmowych napędów satelitarnych w ramach projektów międzynarodowych. W 2013 r. zbudowany w IFPiLM prototyp (silnik typu Halla) przeszedł pomyślnie testy w laboratoriach ESA w Holandii i w IFPiLM. Instytut podlega Ministerstwu Energii. Pierwszym dyrektorem Instytutu był prof. Sylwester Kaliski. Od października 2010 r. dyrektorem Instytutu jest dr hab. prof. Andrzej Gałkowski. W IFPiLM jest zatrudnionych 85 pracowników (w tym 10 profesorów i 25 doktorów).
The year 2016 marks the 60th anniversary of the establishment of the Institute of Plasma Physics and Laser Microfusion in Warsaw (Poland). The newly-created institute realized research on the properties of laser-produced plasma, plasma generated in high-current discharges in plasma-focus devices, and compression of plasma using explosive materials. On 1 January 2007, the Euratom-IPPLM Association was established for coordination by the IPPLM over ten institutions all over Poland that carry out research in plasma physics and technology related to magnetic confinement fusion in the tokamaks and stellarators. New projects were initiated: study of plasma processes in tokamaks, research in fusion technology, development of diagnostics for tokamaks (JET, WEST and ITER), and for the stellarator W7-X. Since 2007, the IPPLM has participated in the European HiPER project, whose aim is to build a fusion infrastructure to demonstrate the effectiveness of laser fusion. After the year 2013, the research and development of fusion in Europe is coordinated by the consortium EUROfusion. The Polish fusion programme is presently coordinated by the IPPLM within the Center of New Technologies for Energy (CeNTE). Generally, the previously realised research is continued. Since October 2010, the director of the institute has been Prof. Andrzej Gałkowski. Currently, the Institute is employing 85 workers, including 45 researchers.
Źródło:
Postępy Techniki Jądrowej; 2016, 3; 2-4
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and theoretical investigations of crater formation in an aluminium target in a PALS experiment
Autorzy:
Borodziuk, S.
Doskach, I.
Gus'kov, S.
Jungwirth, K.
Kálal, M.
Kasperczuk, A.
Kralikova, B.
Krousky, E.
Limpouch, J.
Masek, K.
Pfeifer, M.
Pisarczyk, P.
Pisarczyk, T.
Rohlena, K.
Rozanov, V.
Skala, J.
Ullschmied, J.
Powiązania:
https://bibliotekanauki.pl/articles/147967.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
laser-produced plasma
crater
absorption of laser radiation
resonance mechanism
inverse bremsstrahlung
interferometry
fast electrons
Opis:
Experimental and theoretical results of investigations of the iodine laser - Al solid target interactions on the PALS (Prague Asterix Laser System) facility are presented. The experimental investigations of laser interaction with massive Al targets devoted to shock wave propagation in solids and crater formation physics are presented. Experiments were performed with the use of high intensity laser pulses (1013 15 W/cm2) for two laser wavelengths (0.438 mi m and 1.315 mi m) and four laser beam radii (from 35 mi m up to 600 ěm). The crater dimensions were measured using optical microscopy and a wax-replica technique. Plasma expansion out of the target was measured via three-frame interferometry. Theoretical model of the postpulse crater formation by the shock wave propagating and decaying in solids after the end of the laser pulse is presented and applied for the explanation of the results obtained in experiments.
Źródło:
Nukleonika; 2004, 49, 1; 7-14
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electromagnetic pulses produced by expanding laser - produced Au plasma
Autorzy:
De Marco, M.
Cikhardt, J.
Krása, J.
Velyhan, A.
Pfeifer, M.
Krouský, E.
Klír, D.
Řezáč, D.
Limpouch, J.
Margarone, D.
Ullschmied, J.
Powiązania:
https://bibliotekanauki.pl/articles/147922.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
laser-produced plasma
electromagnetic pulse (EMP)
return target current
Moebius loop antenna
inductive target probe
Opis:
The interaction of an intense laser pulse with a solid target produces large number of fast free electrons. This emission gives rise to two distinct sources of the electromagnetic pulse (EMP): the pulsed return current through the holder of the target and the out flow of electrons into the vacuum. A relation between the characteristics of laser-produced plasma, the target return current and the EMP emission are presented in the case of a massive Au target irradiated with the intensity of up to 3 × 1016 W/cm2. The emission of the EMP was recorded using a 12 cm diameter Moebius loop antennas, and the target return current was measured using a new type of inductive target probe (T-probe). The simultaneous use of the inductive target probe and the Moebius loop antenna represents a new useful way of diagnosing the laser–matter interaction, which was employed to distinguish between laser-generated ion sources driven by low and high contrast laser pulses.
Źródło:
Nukleonika; 2015, 60, 2; 239-243
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulations of generation of high-energy ion beams driven by a petawatt femtosecond laser
Autorzy:
Domański, J
Badziak, J.
Jabłoński, S.
Powiązania:
https://bibliotekanauki.pl/articles/146458.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
laser acceleration
laser plasma
ions
particle-in-cell simulations
Opis:
This contribution presents results of a Particle-in-Cell simulation of ion beam acceleration via the interaction of a petawatt 25 fs laser pulse of high intensity (up to ~1021 W/cm2) with thin hydrocarbon (CH) and erbium hydride (ErH3) targets of equal areal mass density (of 0.6 g/m2). A special attention is paid to the effect that the laser pulse polarization and the material composition of the target have on the maximum ion energies and the number of high energy (>10 MeV) protons. It is shown that both the mean and the maximum ion energies are higher for the linear polarization than for the circular one. A comparison of the maximum proton energies and the total number of protons generated from the CH and ErH3 targets using a linearly polarized beam is presented. For the ErH3 targets the maximum proton energies are higher and they reach 50 MeV for the laser pulse intensity of 1021 W/cm2. The number of protons with energies higher than 10 MeV is an order of magnitude higher for the ErH3 targets than that for the CH targets.
Źródło:
Nukleonika; 2015, 60, 2; 229-232
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of plasma expansion plumes in view of pulses laser irradiating centimeter-scale spherical space debris
Autorzy:
Fang, Yingwu
Powiązania:
https://bibliotekanauki.pl/articles/27310108.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
plasma expansion plume
pulse laser
centimeter-scale spherical space debris
dynamic model
Opis:
The objective of this article was to investigate the dynamic evolution behaviors of plasma expansion plumes by pulses laser irradiating centimeter-scale spherical space debris. A calculated model of centimeter-scale spherical space debris irradiated by pulses laser was firstly deduced based on FEM (finite element method)/COMSOL, and the action rules of plasma expansion plumes by pulses laser-generated irradiating the debris were simulated for different laser powers and action times. The results showed that the velocity of plasma expansion plumes was increased with the increase of laser powers and action times. Especially, when the laser power was 700 kW and the action time was close to 25 μs, the maximum velocity of plasma expansion plumes approached 1.91 km/s, and the diffusion radius of plasma expansion plumes was increased by about 2.5 mm. Further, the diffusion radius was about twice that of 400 kW when the action time reached about 48 μs. As a result, by simulating the transient flow process of nanosecond pulses laser irradiating small spherical space debris, the flow field evolution information and plasma plumes evolution characteristics of centimeter-scale space debris at nanosecond time resolution were revealed.
Źródło:
Optica Applicata; 2023, 53, 3; 363--375
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the bonding strength of FE-based self-fluxing alloy coating deposited by different methods on the steel substrate
Autorzy:
Feldshtein, E.
Kardapolava, M.
Dyachenko, O.
Powiązania:
https://bibliotekanauki.pl/articles/266279.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
natryskiwanie plazmowe
siła wiązania
przetapianie laserem
Fe-based self-fluxing alloy
coating
plasma spraying
laser remelting
bonding strength
Opis:
In the present paper, the bonding strength of Fe-based self-fluxing alloy coating deposited by plasma spraying, gluing and laser remelting and alloying on the steel substrate have been investigated. When flame melting, a globular structure is formed. Against the background of the solid solution carbide-boride phases are clearly distinguishable, between which the Fe–Fe2B and Fe–FeB eutectic colonies are situated. Laser remelting leads to the formation of metastable structures, reinforced with dendrites, consisting of alloyed Fe-α and Fe-γ. At the low laser beam speeds the coating is melted completely with the formation of a cast structure with the dendrites. When the laser beam speed is increased, the dendritic structure gets fragmented. Structures of coatings alloyed with B4C and remelted by the laser beam vary with the increase of the spot speed. The bonding strength of coating without subsequent remelting decreases by 4–5 times in comparison with remelted. The bonding strength of the reinforced glue coating has adhesive and adhesive-cohesive character. When the load increases in the coating, microcracks develop, which gradually spread to the center of the bonding surface. For plasma coatings after laser remelting without additional alloying, the maximum bonding strength is observed with the minimum laser beam speed. With increasing the laser beam speed it decreases almost 1.5 times. In glue coatings reinforced with B4C particulates by laser remelting, the bonding strength is lower by 1.2–1.4 times in comparison with plasma coating.
Źródło:
International Journal of Applied Mechanics and Engineering; 2018, 23, 2; 355-364
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości tribologiczne powłok na bazie żelaza otrzymanych różnymi metodami technologicznymi
The tribological properties of ferrous based coatings formed using different technological methods
Autorzy:
Feldshtein, E.
Kardapolova, M.
Powiązania:
https://bibliotekanauki.pl/articles/189880.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
natryskiwanie plazmowe
stopowanie laserowe
powłoki na bazie żelaza
współczynnik tarcia
zużycie
plasma spraying
laser alloying
ferrous-based coatings
friction coefficient
wear
Opis:
W artykule przedstawiono wpływ powłok na bazie żelaza o różnym składzie chemicznym, nanoszonych różnymi metodami technologicznymi oraz warunków tarcia na właściwości tribologiczne pary trącej, tj. współczynnik tarcia i intensywność zużycia elementów węzła tarcia. Materiałem, na który nakładano powłokę, była stal C45, grubość powłok znajdowała się w zakresie 0,5-0,7 mm.
Plasma-sprayed coatings on the base self-fluxing alloys were investigated. Clean ferrous-based alloy P-Cr16Fe5B4Si4 was used as well as the same with the addition of TaB, MoB, and B4C powders. Fire and laser washing were used to form coatings. The thickness measurements of coatings after processing were from 0.5–0.7 mm, on the base material of steel C45. The metallographic analysis indicated that coating structure depends on the chemical composition of the powder as well as the coating technology. When using an Amsler friction-wear machine, it was determined that when dry technical friction increasingly spreads of torque of friction are observed after some minutes of work, and when oil friction torque are very stable. Additional MoB laser alloying of the coating on a base of P-Cr4Mn2B4Si2V1 powder guarantees a minimal value of the mean friction coefficient. However, the minimal value of the momentary friction coefficient was registered for the coating with additional B4C laser alloying. During dry technical friction, using a coating on a base of P-Cr4Mn2B4Si2V1 powder with additional MoB or B4C laser alloying guarantees a multiple decrease in wear intensity. The presence of oil decreases the influence of material and technology of coating on wear intensity, the difference of values is no more then 20%.
Źródło:
Tribologia; 2011, 3; 31-42
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controlling the plasma electron number density of copper metal using NIR picosecond laser-induced plasma spectroscopy
Autorzy:
Fikry, Mohamed
Tawfik, Walid
Omar, Magdy
Powiązania:
https://bibliotekanauki.pl/articles/2033963.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
picosecond
LIPS
laser induced plasma spectroscopy
copper
electron density
Stark broadening
Opis:
In this paper, we investigate a new method to control the plasma electron number density of copper metal using a near-infrared (NIR) picosecond Nd:YAG laser-induced plasma spectroscopy (LIPS) technique. The applied laser parameters are as follows; laser pulse energy and intensity varied from 29.2 to 59.4 mJ ± 3% and from 6.01×1010 to 12.35×1010 W/cm2 ± 5%, respectively, for a single pulse at 170 ps pulse duration, and beam diameter about 0.5 ± 0.1 mm. By considering the Stark broadening of a specific spectral line, electron density can be calculated using a neutral copper line at 521.8 nm, assuming the local thermodynamic equilibrium (LTE) condition. The observed electron density values were 1.09×1016, 2.24×1016, 3.60×1016, and 4.75×1016 cm–3 for the laser pulse energies 29.2, 41, 52.4, and 59.4 mJ, respectively. The plasma electron density values are increased with the increase in laser pulse energy. Such findings were interpreted due to an increase in the mass ablation rates with laser pulse energy. The obtained results explore the ability to control the plasma electron density by controlling the picosecond pulse energy. These results can contribute to the development of plasma technologies and their applications in many fields.
Źródło:
Optica Applicata; 2021, 51, 3; 365-374
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Post-acceleration of ions from the laser-generated plasma
Autorzy:
Giuffrida, L.
Torrisi, L.
Powiązania:
https://bibliotekanauki.pl/articles/146664.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
laser ablation
laser-plasma
post-acceleration
ion implantation
Rutherford backscattering spectrometry (RBS) analysis
Opis:
An application of the laser-generated plasma for multi-energetic ion implantation is reported. In an experiment performed at Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud (INFN-LNS) of Catania, Italy the Nd:YAG laser was used, operating at the 1064 nm wavelength with the intensity of 1010 W/cm2. A laser pulse of 9 ns duration and 300 mJ energy was employed to ablate a solid target placed in a high vacuum. The free ion expansion occurred in a constant potential chamber placed at 30 kV positive voltage with respect to the ground, which allowed to extract ions with energy proportional to the charge state. In an another experiment, performed at the PALS Prague laser facility (1315 nm, 400 ps pulse width and the laser pulse energy delivered on target equal to about 35 J) Ti ions were obtained through the ablation of solid targets in vacuum by means of 1015 W/cm2 laser pulses. In both cases ion energy analyzers were used to measure the energy-to-charge ratio of the ions. The ion energy distribution was determined from the time-of-flight measurements. The depth profiles measured through Rutherford backscattering spectrometry (RBS) analysis are in good agreement with the ion energy analyzer spectroscopy measurements.
Źródło:
Nukleonika; 2011, 56, 2; 161-163
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 46

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