Academic literature on the topic 'Pulsed field ionisation'

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Journal articles on the topic "Pulsed field ionisation"

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Suzuki, Kazunari, Shun-ichi Ishiuchi, Makoto Sakai, and Masaaki Fujii. "Pulsed field ionisation—ZEKE photoelectron spectrum of o-, m- and p-tolunitrile." Journal of Electron Spectroscopy and Related Phenomena 142, no. 3 (2005): 215–21. http://dx.doi.org/10.1016/j.elspec.2004.09.020.

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Purdie, PH, and J. Fletcher. "Charged Particle Transport in Gaseous Nitrogen at Intermediate E/N using the Voltage Transient Method." Australian Journal of Physics 45, no. 1 (1992): 75. http://dx.doi.org/10.1071/ph920075.

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A pulsed swarm of charged particles crossing an inter-electrode gap under the influence of an applied electric field E will produce a pulsed current in the external circuit which, when integrated over time, will result in a transient voltage pulse, the shape and magnitude of which is characteristic of the number and type of charged particles. This voltage transient technique has been used to investigate a gas discharge in nitrogen gas at values of EIN (the ratio of applied electric field to gas number density), such that ionisation is non-negligible. The voltage transients have been subjected
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Dieckmann, Ralf, Jens Andre Hammerl, Hartmut Hahmann, et al. "Rapid characterisation of Klebsiella oxytoca isolates from contaminated liquid hand soap using mass spectrometry, FTIR and Raman spectroscopy." Faraday Discussions 187 (2016): 353–75. http://dx.doi.org/10.1039/c5fd00165j.

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Microbiological monitoring of consumer products and the efficiency of early warning systems and outbreak investigations depend on the rapid identification and strain characterisation of pathogens posing risks to the health and safety of consumers. This study evaluates the potential of three rapid analytical techniques for identification and subtyping of bacterial isolates obtained from a liquid hand soap product, which has been recalled and reported through the EU RAPEX system due to its severe bacterial contamination. Ten isolates recovered from two bottles of the product were identified as K
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Unnikrishnan, K. "Renormalised Perturbation Theory of Resonant Multiphoton Ionisation." Australian Journal of Physics 48, no. 5 (1995): 835. http://dx.doi.org/10.1071/ph950835.

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Perturbation theory of multiphoton ionisation due to a classical electromagnetic field is modified to allow for intermediate resonances with bound states. Complex energies, generally associated with resonances, do not enter into this formalism. For a monochromatic field of frequency u, a constant ionisation rate can then be defined unambiguously and only such continuum states are excited which correspond to the absorption of energy in integral multiples of hu. As an application, differential and total cross sections for the two-photon ionisation of hydrogen, for frequencies below the n = 3 res
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Malissiova, Eleni, Theofilos Papadopoulos, Aikaterini Kyriazi, et al. "Differences in sheep and goats milk microbiological profile between conventional and organic farming systems in Greece." Journal of Dairy Research 84, no. 2 (2017): 206–13. http://dx.doi.org/10.1017/s0022029917000103.

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The aim of this study was to examine differences in the microbiological profile and antimicrobial resistance of bacteria isolated from milk from organic and conventional sheep and goat farms. Twenty-five organic and 25 conventional sheep and goat farms in the region of Thessaly, Greece participated in this study. A standardised detailed questionnaire was used to describe farming practices. A total of 50 samples were collected and analysed for total viable count (TVC), total coliform count (TCC) and somatic cell count (SCC), whileStaphylococcus aureusandEscherichia coliwere isolated using stand
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Bernier Gosselin, Véronique, Simon Dufour, Pamela R. F. Adkins, and John R. Middleton. "Persistence of coagulase negative staphylococcal intramammary infections in dairy goats." Journal of Dairy Research 86, no. 2 (2019): 211–16. http://dx.doi.org/10.1017/s0022029919000311.

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AbstractThe objectives of the research described here were to describe the persistence of intramammary infections (IMI) caused by coagulase negative staphylococci (CNS) in goats using strain-typing, and to evaluate the relationship between species-specific CNS IMI and somatic cell score (SCS) at the udder-half level. Udder-half milk samples were collected from all 909 lactating goats (1817 halves; 1 blind half) in a single herd. Milk samples were cultured on Columbia blood agar, and 220 goats with at least one half yielding a single colony type CNS were enrolled for two additional half-level s
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Liu, Hang, and Li-Qiang Feng. "Selection of Single Harmonic Emission Peak for Producing Isolated Attosecond Pulse via Chirped-UV Combined Field." Zeitschrift für Naturforschung A 75, no. 1 (2019): 1–10. http://dx.doi.org/10.1515/zna-2019-0220.

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AbstractA potential method to produce isolated attosecond pulses (IAPs) by using low-intensity chirped-UV combined field has been investigated. The results can be separated into three parts. First, by properly introducing the mid-chirp or down-chirp of the low-intensity laser field, the harmonic cutoff can be extended and achieve the referenced value, which is produced from the high-intensity referenced field. Moreover, the spectral continuum is contributed by a single harmonic emission peak, which is beneficial to produce IAPs. However, the harmonic yield is very low due to the lower driven l
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Liperovsky, V. A., C. V. Meister, E. V. Liperovskaya, and V. V. Bogdanov. "On the generation of electric field and infrared radiation in aerosol clouds due to radon emanation in the atmosphere before earthquakes." Natural Hazards and Earth System Sciences 8, no. 5 (2008): 1199–205. http://dx.doi.org/10.5194/nhess-8-1199-2008.

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Abstract. The non-stationary Frenkel model of the generator of spikes of the local electric field with time scales of 1–100 min in the atmosphere near seismic fracture regions some days before strong earthqukes is analysed. The model suggests an aerosol cloud, an increased ionisation velocity (e.g. by radon emanation), and an upward flow of air. It was found that during times of earthquake activity (that means a few days before an earthquake), for realistic increases of the ionization intensity of the atmosphere, mosaic-likely occurring and disappearing pulses of local electric fields with int
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Umarov, I. R., and N. E. Andreev. "Effect of optical field ionisation on the generation of wake fields by femtosecond laser pulses in an inhomogeneous plasma." Quantum Electronics 50, no. 8 (2020): 770–75. http://dx.doi.org/10.1070/qel17312.

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Kuzelev, M. V., and A. A. Rukhadze. "Generation of laser-pulse-field harmonics in a gas upon impact ionisation of atoms." Quantum Electronics 37, no. 10 (2007): 924–26. http://dx.doi.org/10.1070/qe2007v037n10abeh013658.

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Dissertations / Theses on the topic "Pulsed field ionisation"

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Mackenzie, Stuart Robert. "Zero-kinetic-energy photoelectron spectroscopy and the study of state-selected ion-molecule reactions." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297292.

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Jobunga, Eric Ouma. "Beyond-the-dipole effects in strong-field photoionization using short intense laser pulses." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17653.

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Die Entwicklung Freier-Elektronen-Laser und einer neuen Generation von Strahlungsquellen erlaubt die Realisierung hoher Intensitäten und kurzer Pulsdauern. Im Regime niedriger Laserintensitäten war bisher die Dipolnäherung recht erfolgreich bei der Beschreibung der durch die Licht-Materie-Wechselwirkung erzeugten Dynamik, wodurch viele experimentell beobachtete Resultate reproduziert werden konnten. Bei den durch die neuen Strahlungsqullen erzeugten bisher unerreichten Intensitäten und Rönten-Wellenlängen kann die Dipolnäherung allerdings zusammenbrechen. Höhere Multipol-Wechselwirkungen, die
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Vanne, Yulian V. "Ionization of molecular hydrogen in ultrashort intense laser pulses." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2010. http://dx.doi.org/10.18452/16107.

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Ein neuer numerischer ab initio Ansatz wurde entwickelt und zur Lösung der zeitabhängigen Schrödingergleichung für zweiatomig Moleküle mit zwei Elektronen (z.B. molekularer Wasserstoff), welche einem intensiven kurzen Laserpuls ausgesetzt sind, angewandt. Die Methode basiert auf der Näherung fester Kernabstände und der nicht-relativistischen Dipolnäherung und beabsichtigt die genaue Beschreibung der beiden korrelierten Elektronen in voller Dimensionalität. Die Methode ist anwendbar für eine große Bandbreite von Laserpulsparamtern und ist in der Lage, Einfachionisationsprozesse so
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Lin, Nan. "Application of attosecond pulses to high harmonic spectroscopy of molecules." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-01064138.

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High-order Harmonic Generation (HHG) is an extreme nonlinear process that can be intuitively understood as the sequence of 3 steps: i) tunnel ionization of the target atom/molecule, creating an electronic wave packet (EWP) in the continuum, ii) acceleration of the EWP by the strong laser field and iii) recombination to the core with emission of an attosecond burst of XUV coherent light. HHG thus provides a tunable ultrashort tabletop source of XUV/Soft X-ray radiation on attosecond time scale for applications ('direct' scheme). At the same time, it encodes coherently in the XUV radiation the s
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Fourcade, Dutin Coralie. "Réduction de la durée d’impulsions laser par des techniques extra et intra-cavité : post-compression d’impulsions femtosecondes énergétiques et modulation spectrale des pertes dans un pré-amplificateur Ti˸saphir." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14298/document.

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La course vers les impulsions ultra-courtes et énergétiques est en plein essor avec le développement de nombreuses applications. Dans ce manuscrit, plusieurs méthodes de réduction de la durée d'impulsion énergétique sont étudiées. La mise en oeuvre d’un système de post-compression basé sur le principe de SPM-NER dans une lame de silice a tout d'abord permis de produire, à partir d'impulsions de 50 fs, des impulsions de 16 fs-5mJ. Dans une seconde partie, nous proposons une nouvelle méthode de post-compression efficace basée sur l'ionisation d'un gaz rare dans un capillaire creux. Cette techniq
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Book chapters on the topic "Pulsed field ionisation"

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Gumbrell, E. T., R. A. Smith, T. Ditmire, A. Djaoui, S. J. Rose, and M. H. R. Hutchinson. "Time Resolved Optical Probing of Supersonic Ionisation Fronts in Short Pulse-Solid Target Interactions." In Applications of High-Field and Short Wavelength Sources. Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-9241-6_24.

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