Academic literature on the topic 'Ablation–expansion'

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Journal articles on the topic "Ablation–expansion"

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Cilia, Federico, Lourdes Farrugia, Charles Sammut, et al. "Uncooled Insulated Monopole Antenna for Microwave Ablation: Improved Performance with Coaxial Cable Annealing." Applied Sciences 15, no. 12 (2025): 6616. https://doi.org/10.3390/app15126616.

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There is growing interest in measuring the temperature-dependent dielectric properties of bio-tissues using dual-mode techniques (scattering measurements and thermal treatment). Uncooled coaxial antennas are preferred for their direct contact with the measured medium and reduced complexity; however, they exhibit structural changes during ablation due to the thermal expansion of polytetrafluoroethylene (PTFE). This paper presents an experimental study on PTFE expansion in an uncooled coaxial insulated monopole antenna in response to changes in the tissue’s thermal environment. Furthermore, it p
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SEMEROK, A., B. SALLÉ, J. F. WAGNER, and G. PETITE. "Femtosecond, picosecond, and nanosecond laser microablation: Laser plasma and crater investigation." Laser and Particle Beams 20, no. 1 (2002): 67–72. http://dx.doi.org/10.1017/s0263034602201093.

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Crater shapes and plasma plume expansion in the interaction of sharply focused laser beams (10 μm waist diameter, 60 fs–6 ns pulse duration) with metals in air at atmospheric pressure were studied. Laser ablation efficiencies and rates of plasma expansion were determined. The best ablation efficiency was observed with femtosecond laser pulses. It was found that for nanosecond pulses, the laser beam absorption, its scattering, and its reflection in plasma were the limiting factors for efficient laser ablation and precise material sampling with sharply focused laser beams. The experimental resul
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YABE, Takashi. "Expansion and Condensation Processes in Laser-Induced Ablation." Journal of Plasma and Fusion Research 79, no. 11 (2003): 1160–68. http://dx.doi.org/10.1585/jspf.79.1160.

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Gurlui, Silviu, and Cristian Focsa. "Laser Ablation Transient Plasma Structures Expansion in Vacuum." IEEE Transactions on Plasma Science 39, no. 11 (2011): 2820–21. http://dx.doi.org/10.1109/tps.2011.2151884.

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Budtz-Jørgensen, Casper V., Michael M. Mond, Brendan Doggett, and James G. Lunney. "Model for laser ablation plume expansion in gas." Journal of Physics D: Applied Physics 38, no. 12 (2005): 1892–98. http://dx.doi.org/10.1088/0022-3727/38/12/007.

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Butz-Jørgensen, C. V., M. M. Mond, B. Doggett, and J. G. Lunney. "Model for laser ablation plume expansion in gas." Journal of Physics D: Applied Physics 39, no. 21 (2006): 4739. http://dx.doi.org/10.1088/0022-3727/39/21/c02.

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Edsall, Connor W., Laura Huynh, Yasemin Yuksel Durmaz, Waleed Mustafa, and Eli Vlaisavljevich. "Nanoparticle-mediated histotripsy using dual-frequency histotripsy pulsing: Comparison of bubble-cloud characteristics and ablation efficiency." Journal of the Acoustical Society of America 152, no. 4 (2022): A116. http://dx.doi.org/10.1121/10.0015730.

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Nanoparticle-mediated histotripsy (NMH) is a targeted ablation method using perfluorocarbon-filled nanoparticles to generate bubble-clouds at pressure levels (9–12 MPa) significantly below the histotripsy intrinsic threshold (>25 MPa). Prior studies have also shown a significant reduction in ablation efficiency compared to conventional histotripsy, likely from reduced bubble expansion and bubble-cloud density. Here, we investigate the bubble-cloud characteristics and ablation efficiency for NMH using dual-frequency pulsing. We hypothesize this method will increase ablation efficiency by inc
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Wang, Qingsong, Lan Jiang, Jingya Sun, et al. "Structure-Mediated Excitation of Air Plasma and Silicon Plasma Expansion in Femtosecond Laser Pulses Ablation." Research 2018 (December 9, 2018): 1–11. http://dx.doi.org/10.1155/2018/5709748.

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Femtosecond laser-induced surface structures upon multiple pulses irradiation are strongly correlated with the pulse number, which in turn significantly affects successive laser-material interactions. By recording the dynamics of femtosecond laser ablation of silicon using time-resolved shadowgraphy, here we present direct visualization of the excitation of air plasma induced by the reflected laser during the second pulse irradiation. The interaction of the air plasma and silicon plasma is found to enhance the shockwave expansion induced by silicon ablation in the longitudinal direction, showi
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Blejchař, Tomáš, Václav Nevrlý, Michal Vašinek, et al. "Desorption/ablation of lithium fluoride induced by extreme ultraviolet laser radiation." Nukleonika 61, no. 2 (2016): 131–38. http://dx.doi.org/10.1515/nuka-2016-0023.

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Abstract The availability of reliable modeling tools and input data required for the prediction of surface removal rate from the lithium fluoride targets irradiated by the intense photon beams is essential for many practical aspects. This study is motivated by the practical implementation of soft X-ray (SXR) or extreme ultraviolet (XUV) lasers for the pulsed ablation and thin film deposition. Specifically, it is focused on quantitative description of XUV laser-induced desorption/ablation from lithium fluoride, which is a reference large band-gap dielectric material with ionic crystalline struc
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Tang, J. Y., W. Zhang, J. Sun, N. Xu, C. Ge, and J. D. Wu. "Spectroscopic Study on the Enhanced Excitation of an Electron Cyclotron Resonance Nitrogen Plasma by Pulsed Laser Ablation of an Aluminum Target." Applied Spectroscopy 62, no. 11 (2008): 1256–61. http://dx.doi.org/10.1366/000370208786401671.

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The influence of pulsed laser ablation of an aluminum target on the nitrogen plasma produced by electron cyclotron resonance (ECR) microwave discharge has been studied by optical emission spectroscopy (OES) with time and space resolution. The continuous wave (CW) feature of the optical emissions from the ECR nitrogen plasma turns to vary with time and space due to pulsed laser ablation and the expansion of the ablation-induced aluminum plume in the nitrogen plasma. The optical emissions from the nitrogen plasma increase significantly and the emission intensity of nitrogen molecular ions is obs
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Dissertations / Theses on the topic "Ablation–expansion"

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Fu, Rui. "Thermo-Mechanical Coupling for Ablation." UKnowledge, 2018. https://uknowledge.uky.edu/me_etds/111.

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In order to investigate the thermal stress and expansion as well as the associated strain effect on material properties caused by high temperature and large temperature gradient, a two-way thermo-mechanical coupling solver is developed. This solver integrates a new structural response module to the Kentucky Aerothermodynamics and Thermal response System (KATS) framework. The structural solver uses a finite volume approach to solve either hyperbolic equations for transient solid mechanics, or elliptic equations for static solid mechanics. Then, based on the same framework, a quasi-static approa
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Sen, Ananya. "Chiral recognition in neutral and ionic molecular complexes." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112163/document.

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L'objectif principal de cette thèse est l’étude spectroscopique de molécules ou de complexes portant plusieurs centres chiraux en phase gazeuse, pour comprendre les effets de la stéréochimie sur leurs propriétés structurales. Des alcaloïdes dérivés de la Cinchonine ont été introduits intacts en phase gazeuse par ablation laser. Ils ont été étudiés en combinant un jet supersonique avec de la spectroscopie laser. Les deux pseudo-énantiomères Quinine et Quinidine ont montré des spectres électroniques et vibrationnels similaires, en accord avec leur structure similaire. Leurs propriétés en solutio
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Iwan, Bianca. "Creating and Probing Extreme States of Materials : From Gases and Clusters to Biosamples and Solids." Doctoral thesis, Uppsala universitet, Molekylär biofysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-180997.

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Free-electron lasers provide high intensity pulses with femtosecond duration and are ideal tools in the investigation of ultrafast processes in materials. Illumination of any material with such pulses creates extreme conditions that drive the sample far from equilibrium and rapidly convert it into high temperature plasma. The dynamics of this transition is not fully understood and the main goal of this thesis is to further our knowledge in this area. We exposed a variety of materials to X-ray pulses of intensities from 1013 to above 1017 W/cm2. We found that the temporal evolution of the resul
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Book chapters on the topic "Ablation–expansion"

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Słowicka, A. M., Z. A. Walenta, J. Hoffman, J. Chrzanowska, and T. Mościcki. "Structure and Expansion of a Plume Emitted During Laser Ablation of Multicomponent Materials." In 30th International Symposium on Shock Waves 2. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-44866-4_14.

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Oguri, Katsuya, Yasuaki Okano, Tadashi Nishikawa, and Hidetoshi Nakano. "Observation of Ultrafast Bond-length Expansion at the Initial Stage of Laser Ablation by Picosecond Time-resolved EXAFS." In Springer Series in Optical Sciences. Springer New York, 2007. http://dx.doi.org/10.1007/978-0-387-49119-6_22.

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Serra, P., L. Clèries, and J. L. Morenza. "Analysis of the expansion of hydroxyapatite laser ablation plumes." In Laser Ablation. Elsevier, 1996. http://dx.doi.org/10.1016/b978-0-444-82412-7.50042-0.

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Angleraud, B., C. Girault, C. Champeaux, F. Garrelie, C. Germain, and A. Catherinot. "Study of the expansion of the laser ablation plume above a boron nitride target." In Laser Ablation. Elsevier, 1996. http://dx.doi.org/10.1016/b978-0-444-82412-7.50024-9.

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Hakan Yilmaz, Ahmet, Bülend Ortaç, Saliha Mutlu, and Sevil Savaskan Yilmaz. "Synthesis of Polyethylene-Based Materials, Ion Exchanger, Superabsorbent, Radiation Shielding, and Laser Ablation Applications." In Polyethylene - New Developments and Applications [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1003665.

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Polyethylene (PE), ion exchangers and membranes, super absorbents, radiation shielding, and laser ablation are covered initially. In the second part, studies on polyethylene-based ion exchangers and membranes are given. Ion exchangers and membranes chemically modify copolymers to exchange ions in the electrolyte solution. The third segment covers research on polyethylene-based super absorbent copolymers and composites for water retention and heavy metal contamination removal. Super absorbent polymers are hydrophilic, water-insoluble polymers that absorb plenty of water. With their expansion ca
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Zhang, Weigang, Changming Xie, Xi Wei, and Min Ge. "C/C-ZrB2-ZrC-SiC Composite Derived from Polymeric Precursor Infiltration and Pyrolysis." In MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-4066-5.ch014.

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Part II. Mechanical and ablation properties of the 2D C/C-ZrB2-ZrC-SiC composites with a fiber volume fraction of 17.6%, fabricated by infiltration and co-pyrolysis of blended polymeric precursors, were studied in this Part II. Flexural strength and fracture toughness of the composites were found to be influenced strongly by the thickness of the deposited pyrolytic carbon interphase, a composite with the pyrolytic carbon volume fraction of 22.3% exhibits improved bending strength and fracture toughness of 127.9 MPa and 6.23 MPa·m1/2, respectively. The pseudo-plastic strain to failure of the co
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Atesmen, M. Kemal. "Use of Ablation Materials As Heat Shield to Protect Spacecrafts Entering Earth’s Atmosphere From Incoming Excessive Heat Loads." In Case Studies in Transient Heat Transfer With Sensitivities to Governing Variables. ASME, 2023. http://dx.doi.org/10.1115/1.886786_ch4.

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The surface boundary of a spacecraft entering Earth’s atmosphere from space at very high speeds, i.e. about 18,000 mph, experiences high heat loads, i.e. in the order of 107 W/m2, due to convection and radiation heat transfers and aerodynamic heating. Ablating materials are used to capture most of the incoming heat load to protect the spacecraft, its occupants and its instruments from excessive heat loads. Ablation of special materials such as teflon, phenolic nylon, and silicon based ablative materials are used to cover surfaces of a spacecraft in order to absorb, melt and evaporate during th
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Wang, Jian. "Research on the Method of Artistic Image Restoration Based on Artificial Intelligence." In Frontiers in Artificial Intelligence and Applications. IOS Press, 2024. http://dx.doi.org/10.3233/faia231514.

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In order to improve the current inpainting algorithm for natural art images, an artistic image inpainting model is proposed by integrating artificial intelligence and embedding multi-scale attention expansion convolution. According to the uniqueness of artistic images, the network structure of DMFB is improved, and its repair model combines two plug-and-play optimization modules: extended convolution block and coordinate attention mechanism. The extended convolution module is used to capture multi-scale context information, and the coordinate attention mechanism is used to improve the remote m
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Le, H. C., J. Vuillon, D. Zeitoun, W. Marine, M. Sentis, and R. W. Dreyfus. "2D modeling of laser-induced plume expansion near the plasma ignition threshold." In Laser Ablation. Elsevier, 1996. http://dx.doi.org/10.1016/b978-0-444-82412-7.50018-3.

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Chaudhary, Kashif, S. Zuhaib Haider, and M. Sufi Roslan. "Laser Induced Plasma: Fundamentals and Characterization." In Laser-based Techniques for Nanomaterials. Royal Society of Chemistry, 2024. https://doi.org/10.1039/9781837673513-00079.

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Laser-induced plasma (LIP) can be distinguished from other plasmas such as discharge plasma, inductively coupled plasma (ICP), etc. due to its violent expansion into the ambient atmosphere. LIPs are generated as a result of radiation absorption by the target material in solid, liquid, gaseous, or aerosol state, of a high-power laser pulse. The physical and chemical characteristics of the LIP depend on the experimental and ambient conditions, including the laser parameters (spot size, pulse width, wavelength, irradiance, etc.), the nature and state of the target material, and the surrounding en
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Conference papers on the topic "Ablation–expansion"

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Banerji, Nikhil, Penelope Leyland, and Richard G. Morgan. "Expansion Tunnel Ablation Testing in Venus Entry Conditions." In 46th AIAA Thermophysics Conference. American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-3231.

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Colonna, Gianpiero, A. Casavola, and Mario Capitelli. "Modeling of TiO plume expansion under laser ablation." In ALT'99 International Conference: Advanced Laser Technologies, edited by Vladimir I. Pustovoy and Vitali I. Konov. SPIE, 2000. http://dx.doi.org/10.1117/12.378169.

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Hosokawa, Yoichiroh, Takashi Mito, Takuji Tada, Tsuyoshi Asahi, and Hiroshi M. Masuhara. "Laser-induced expansion and ablation mechanisms of organic materials." In Second International Symposium on Laser Precision Micromachining, edited by Isamu Miyamoto, Yong Feng Lu, Koji Sugioka, and Jan J. Dubowski. SPIE, 2002. http://dx.doi.org/10.1117/12.456806.

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Albert, O., J. Etchepare, J. C. Loulergue, et al. "Femtosecond laser ablation: imaging expansion dynamics of the plasma." In CLEO 2001. Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Technical Digest. IEEE, 2001. http://dx.doi.org/10.1109/cleo.2001.947817.

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Zeng, Xianzhong J., Xianglei Mao, Ralph Greif, and Richard E. Russo. "Ultraviolet femtosecond and nanosecond laser ablation of silicon: ablation efficiency and laser-induced plasma expansion." In High-Power Laser Ablation 2004, edited by Claude R. Phipps. SPIE, 2004. http://dx.doi.org/10.1117/12.544401.

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Agop, M., P. Nica, S. Gurlui, C. Focsa, and Claude Phipps. "Fractal hydrodynamic model of high-fluence laser ablation plasma expansion." In INTERNATIONAL SYMPOSIUM ON HIGH POWER LASER ABLATION 2010. AIP, 2010. http://dx.doi.org/10.1063/1.3507153.

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Paolasini, Steven, and Anne Kietzig. "Synchronized videography of plasma plume expansion during femtosecond laser ablation." In SPIE LASE, edited by Yoshiki Nakata, Xianfan Xu, Stephan Roth, and Beat Neuenschwander. SPIE, 2014. http://dx.doi.org/10.1117/12.2040032.

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Djebli, M., El-Hachemi Amara, Saïd Boudjemai, and Djamila Doumaz. "Laser Ablation Plume Expansion In The Presence Of Charged Impurities." In LASER AND PLASMA APPLICATIONS IN MATERIALS SCIENCE: First International Conference on Laser Plasma Applications in Materials Science—LAPAMS’08. AIP, 2008. http://dx.doi.org/10.1063/1.2999977.

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Chang, Hao, Weijing ZHOU, and Nanlei LI. "Al target temperature characteristics by laser ablation and its plume expansion." In Fifth International Symposium on Laser Interaction with Matter, edited by YiJun Zhao. SPIE, 2019. http://dx.doi.org/10.1117/12.2524433.

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Rumianowski, Roman, and Roman S. Dygdala. "Investigation of plasma plume expansion due to laser ablation of Pb." In SPIE Proceedings, edited by Krzysztof M. Abramski, Edward F. Plinski, and Wieslaw Wolinski. SPIE, 2003. http://dx.doi.org/10.1117/12.515848.

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Reports on the topic "Ablation–expansion"

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Zeng, Xianzhong, Xianglei Mao, Ralph Greif, and Richard E. Russo. Ultraviolet femtosecond and nanosecond laser ablation of silicon: Ablation efficiency and laser-induced plasma expansion. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/836676.

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Lindley, Roger Alan. Resonant holographic measurements of laser ablation plume expansion in vacuum and argon gas backgrounds. Office of Scientific and Technical Information (OSTI), 1993. http://dx.doi.org/10.2172/10103276.

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