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Phase imaging of irradiated foils at the OMEGA EP facility using phase-stepping X-ray Talbot–Lau deflectometry

High Power Laser science and Engineering 2023年第4期11卷 45-54页

作者： G.Pérez-Callejo V.Bouffetier L.Ceurvorst T.Goudal s.R.Klein D.svyatskiy M.Holec P.Perez-Martin K.Falk A.Casner T.E.Weber G.Kagan M.P.Valdivia Departamento de Física Teórica Atómica yÓptica Universidad de ValladolidValladolidSpain Universitéde Bordeaux-CnRs-CEA Centre Lasers Intenses et Applications(CELIA)UMR 5107TalenceFrance European XFEL GmbH SchenefeldGermany Laboratory for Laser Energetics RochesterNew YorkUSA CEA-dam DIFArpajonFrance University of Michigan Ann ArborMichiganUSA Los Alamos national Laboratory Los AlamosNew MexicoUSA Lawrence Livermore national Laboratory LivermoreCaliforniaUSA Helmholtz-Zentrum Dresden-Rossendorf DresdenGermany Technische Universität Dresden DresdenGermany Institute of Physics of the AsCR PragueCzech Republic CEA-CEsTA CS 60001Le Barp CedexFrance Blackett Laboratory Imperial College LondonLondonUK Department of Astrophysics and Astronomy The Johns Hopkins UniversityBaltimoreMarylandUSA Center for Energy Research University of California San DiegoSan DiegoCaliforniaUSA

Diagnosing the evolution of laser-generated high energy density(HED)systems is fundam.ntal to develop a correct understanding of the behavior of matter under extreme ***–Lau interferometry constitutes a promising tool,since it permits simultaneous single-shot X-ray radiography and phase-contrast imaging of dense *** present the results of an experiment at OMEGA EP that aims to probe the ablation front of a laser-irradiated foil using a Talbot–Lau X-ray interferometer.A polystyrene(CH)foil was irradiated by a laser of 133 J,1 ns and probed with 8 keV laser-produced backlighter radiation from Cu foils driven by a short-pulse laser(153 J,11 ps).The ablation front interferograms were processed in combination with a set of reference images obtained ex situ using *** managed to obtain attenuation and phase-shift images of a laser-irradiated foil for electron densities above 1022 cm−*** results showcase the capabilities of Talbot–Lau X-ray diagnostic methods to diagnose HED laser-generated plasmas through high-resolution imaging.

关键词： deflectometry OMEGA EP phase-contrast imaging Talbot-Lau X-ray interferometry

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Physico-Chemical and Microbiological Analysis of Water of the “Presa De Los Patos” in the Desierto De Los Leones national Park, Mexico

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Advances in Biological Chemistry 2017年第2期7卷 122-138页

作者： Luis Raúl Gutiérrez-Lucas Luz María Chávez-ram.rez Leticia Arregui Departamento de Ciencias naturales DCNI Universidad Aut&oacute noma Metropolitana Unidad Cuajimalpa M&eacute xico City M&eacute xico secretarí a de salud Centro de Salud TI Memetla M&eacute xico City M&eacute xico

The Desierto de los Leones national Park is a place that features recreational activities for residents and visitors to Mexico City. The Presa de los Patos (Ducks dam. is one of the many bodies of water that are present in the park. By means of physico-chemical and microbiological analysis, it was determined that the water of the Presa de los Patos cannot be considered potable. The pH range was between 5.5 - 5.9. The turbidity exceeded the values established in the standards (10.7 - 32.3 nephelometric Turbidity Units (nTU’s)). Chemical Oxygen Demand (COD) showed that large amounts of oxygen are needed to oxidize organic matter (106 - 450 mg/L). The amount of coliforms and fecal coliforms exceeds the values established by the standards used (total coliforms 98 - 956 Colony Forming Units (CFU’s), fecal coliforms 78 - 807 CFU’s). Five bacterial genera (Escherichia coli, Pseudomona, Klebsiella, shigella and salmonella) were isolated and identified. Most of the bacteria isolated were resistant to ampicillin (90%), while 25% were resistant to ciprofloxacin. The water consumption of the Presa de los Patos is a great risk for the habitants and visitors of the park.

关键词： Water Physico-Chemical Microbiological Antimicrobial Resistance Antibiotics

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Total Reflection X-Ray Fluorescence Analysis of Toxic Metals in Fish Tissues

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American Journal of Analytical Chemistry 2014年第12期5卷 805-811页

作者： Graciela Zarazúa Karina Girón-Romero samuel Tejeda Carmen Carreno-De León Pedro Avila-Pérez nuclear Technology Division National Institute for Nuclear ResearchOcoyoacacMexico Faculty of science University of Mexico StateTlachaloyaMexico Technology Institute of Toluca MetepecMexico

The concentration of Cr, ni, Cu, Zn, Hg and Pb, considered like toxic, was evaluated in fish tissues by means the total reflection X-Ray Fluorescence technique (TXRF). Grass carp (Ctenopharygodon idella) samples were collected from six regions of the Tepuxtepec dam.which was used as a water reservoir and fish production for the local population. Fish tissues: gills, liver, kidney and muscle were analyzed in triplicate using a TXRF spectrometer “TX-2000 Ital structures” with a si(Li) detector and a resolution of 140 eV (FWHM) at Mn Kα and Mo tube (40 kV, 30 mA) with 17.4 KeV excitation energy. The mean concentration of metals in tissues decrease in the sequence: Kidney ≈ Gills > Liver > Muscle;the range of concentration for Zn was 26.68 - 816.67 mg/Kg followed by Cu: 1.18 - 35.81 mg/Kg, Cr: 1.10 - 9.30 mg/Kg, ni: 0.40 - 3.80 mg/Kg, Pb: nd Hg: nd mercury concentrations slightly exceed the limits for fish proposed by FAO/WHO and Mexican Legislation for human consumption in the edible parts of fish from each one of the regions of the Tepuxtepec dam. The results show that metal accumulation in herbivorous carp tissues was higher in regions 1, 2 and 3 than the others, which could be due to the influence of Lerma River, one of the most polluted rivers of Mexico.

关键词： Metals Fish Tissues TXRF

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