Academic literature on the topic 'Ionisation'

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Journal articles on the topic "Ionisation"

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Ford, M. J. "Studies of the Electron-impact Double-ionisation Process in Magnesium using Coincidence Techniques." Australian Journal of Physics 51, no. 4 (1998): 665. http://dx.doi.org/10.1071/p98013.

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This article will review recent measurements of the electron-impact double-ionisation of atomic magnesium. Results for the resonant Auger double-ionisation process with coincident detection of all three outgoing electrons, the (e, 3e) experiment, and for the direct double-ionisation process where only two outgoing electrons are detected, the (e, (3 – 1)e) experiment, will be discussed. The results are analysed with reference to ionisation mechanisms and comparisons are made with calculated double-ionisation cross sections.
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Ong, Duu Sheng, Ai Hui Tan, Kan Yeep Choo, Keat Hoe Yeoh, and John P. R. David. "Weibull-Fréchet random path length model for avalanche gain and noise in photodiodes." Journal of Physics D: Applied Physics 55, no. 6 (2021): 065105. http://dx.doi.org/10.1088/1361-6463/ac31f0.

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Abstract A four-parameter Weibull-Fréchet (WF) distribution function has been introduced in the random path length (RPL) model for nonlocal modelling of soft-threshold ionisation in semiconductors. The WF function has been demonstrated to be capable of reproducing the realistic probability distribution function (PDF) of electron and hole ionisation path lengths extracted from full band Monte Carlo (FBMC) transport simulations of bulk GaAs. The electron-initiated multiplication in GaAs avalanche photodiodes (APDs) calculated by the WF-RPL model is in excellent agreement with the results from FB
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REED, VALERIE C. "SUPERINTENSE FIELD IONISATION SUPPRESSION IN THE HIGH FREQUENCY REGIME." Modern Physics Letters B 06, no. 12 (1992): 683–701. http://dx.doi.org/10.1142/s0217984992000776.

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We present a brief review of the subject of ionisation suppression, or atomic stabilisation, in intense laser fields. As a preliminary, we outline the general non-linear response of an atom to a strong laser field, describing multiphoton ionisation and harmonic generation. We then discuss methods of suppressing the ionisation rate from an atom, considering two broad regimes: strong field ionisation (I < 1016 W/cm 2), in which the suppression mechanism in generally interpreted in terms of quantum interference; and superintense field ionisation (I > 1016 W/cm 2), in which the Kramers-Henne
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McKoy, V., SN Dixit, RL Dubs, and DL Lynch. "Dynamics of Single­ and Multi-photon Ionisation Processes in Molecules." Australian Journal of Physics 39, no. 5 (1986): 761. http://dx.doi.org/10.1071/ph860761.

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Single-photon ionisation and resonant multiphoton ionisation studies, which can now be carried out using synchrotron radiation and pulsed dye lasers respectively, are providing important dynamical information on molecular photoionisation. In this paper we discuss some results of our recent studies of several, single- and multi-photon ionisation processes in molecules. The results will be taken from our studies of (i) single-photon ionisation of linear molecules with emphasis on the role of shape and autoionising resonances on these cross� sections, (ii) photoionisation from oriented NiCO as a
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Padma, R., and PC Deshmukh. "Near-threshold Behaviour of Generalised Oscillator Strengths for 2p Ionisation." Australian Journal of Physics 47, no. 3 (1994): 271. http://dx.doi.org/10.1071/ph940271.

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Near the ionisation threshold, the behaviour of the generalised oscillator strength (GOS) is sensitive to the choice of the model atomic potential. In electron-impact ionisation, 'delayed maxima' of the GOS often occur near the ionisation threshold due to centrifugal barrier effects. In the present work, the sensitivity of this important effect of the centrifugal barrier to the model atomic potential has been studied using two local density atomic potentials, namely, the nonrelativistic Hartree-Slater potential and the relativistic RCB potential. Calculations have been done for electron-impact
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Ernest, A., SC Haydon, and MT Elford. "Excited-state Quenching Phenomena in Weakly Ionised Nitrogen." Australian Journal of Physics 39, no. 4 (1986): 479. http://dx.doi.org/10.1071/ph860479.

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A number of studies of the ionisation behaviour of molecular nitrogen have revealed the importance of N 2(A 3L ;;) metastable particles which are created by direct electron impact excitation or cascade processes. More recent studies using cleaner gas samples have indicated that the ionisation current may be affected by the presence of a second metastable particle. The possible identity of this second metastable particle and the sensitivity of the ionisation current to its presence have been investigated by observing the changes in the pre-breakdown ionisation current as a function of the purit
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Prashant, Abhishek, Meetu Luthra, Kanupriya Goswami, Anand Bharadvaja, and Kasturi Lal Baluja. "Positron Scattering from Pyrimidine." Atoms 11, no. 3 (2023): 55. http://dx.doi.org/10.3390/atoms11030055.

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The positron impact cross-sections of pyrimidine molecules are reported from 1 eV to 5000 eV. These cross-sections include differential elastic, integral elastic, and direct ionisation. The elastic cross-sections are computed using the single-centre expansion scheme whereas the direct ionisation cross-sections are obtained using the binary-encounter-Bethe formula. The integral and differential cross-sections exhibit consistency with the experimental and other theoretical results. The direct ionisation cross-sections, which are reported for the first time, are compared with the experimental ine
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Gates, Paul J. "Atmospheric pressure chemical ionisation mass spectrometry for the routine analysis of low molecular weight analytes." European Journal of Mass Spectrometry 27, no. 1 (2021): 13–28. http://dx.doi.org/10.1177/14690667211005055.

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The routine analysis of low molecular weight analytes by mass spectrometry is often complicated by the lability of the analyte’s functional groups and/or the lack of moieties that can be easily charged. If a molecule is too labile this precludes analysis by techniques such as electron ionisation or chemical ionisation as the analyte will undergo thermal decomposition prior to ionisation as well as spontaneous fragmentation during the ionisation process. If the analyte has a low propensity to form ions in electrospray ionisation (i.e., lacks acidic or basic sites) then often no analyte related
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Pagano, P., A. Bemporad, and D. H. Mackay. "Hydrogen non-equilibrium ionisation effects in coronal mass ejections." Astronomy & Astrophysics 637 (May 2020): A49. http://dx.doi.org/10.1051/0004-6361/202037638.

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Context. A new generation of coronagraphs used to study solar wind and coronal mass ejections (CMEs) are being developed and launched. These coronagraphs will heavily rely on multi-channel observations where visible light (VL) and UV-EUV (ultraviolet-extreme ultraviolet) observations provide new plasma diagnostics. One of these instruments, Metis on board ESA-Solar Orbiter, will simultaneously observe VL and the UV Lyman-α line. The number of neutral hydrogen atoms (a small fraction of coronal protons) is a key parameter for deriving plasma properties, such as the temperature from the observed
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Lohmann, Birgit, S. J. Cavanagh, M. A. Haynes, I. Taouil, A. Duguet, and A. Lahmam-Bennani. "Investigating Inner Shell Ionisation via the (e, 2e) Technique." Australian Journal of Physics 51, no. 4 (1998): 679. http://dx.doi.org/10.1071/p97093.

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The (e, 2e) technique has been applied successfully to valence shell ionisation of many targets, but studies of inner shell ionisation by this technique have been limited. The triple differential cross section for the latter process exhibits behaviour which is very different to that observed for valence shell ionisation, particularly when the energy of the slow ejected electron is decreased below the binding energy of the inner shell orbital. Our recent results for inner shell ionisation of argon and krypton will be discussed, and comparisons made with distorted wave calculations.
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Dissertations / Theses on the topic "Ionisation"

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Grant, John. "Measuring mesospheric ionisation." Thesis, University of Canterbury. Physics, 2002. http://hdl.handle.net/10092/6072.

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The differential absorption method of retrieving D-region electron density profiles from partially reflected MF radar pulses, has existed in many variants since the original Gardner and Pawsey experiment of 1953. Magnetoionic theory predicts that a pulse propagating within the ionosphere undergoes birefringence two magnetoionic modes. The differential absorption method requires that both the differential absorption and the ratio of the reflection coefficients of those modes are evaluated from a model profile. In this thesis, a critical review of the differential absorption method is undertake
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Carruthers, David Robert James. "Quantal threshold ionisation." Thesis, Queen's University Belfast, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333786.

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Dillon, Leonard A. "Electrospray ionisation of volatile analytes : a parametric study of secondary electrospray ionisation." Thesis, University of Huddersfield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494308.

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With the development of the International Space Station and the planned increase in the duration of spacecraft missions NASA (National Aeronautics and Space Administration) issued a challenge for the development of an on-board environmental monitoring system to analyse air and water within a space station. The response to the challenge within the University of Manchester was the Chip Hyphenation Project which sort to bring together miniaturised sampling, separation and detection systems into a single device. Linking the separation and detection systems was the process of ionisation. This study
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Kara, Vanita. "Positron impact ionisation studies." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394610.

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L'Huillier, Anne. "Ionisation multiphotonique et multielectronique." Paris 6, 1986. http://www.theses.fr/1986PA066268.

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Premiere mise en evidence experimentale d'ions multicharges de gaz rares crees par absorption multiphotonique a 532 et 1064 nm, pour differentes annees de l'impulsion laser (5 a 200 ps). Etude theorique utilisant un formalisme derive de la theorie des perturbations a n corps et des techniques diagrammatiques pour l'ionisation simple et double multiphotonique d'un atome a plusieurs electrons non independants
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L'Huillier, Anne. "Ionisation multiphotonique et multiélectronique." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375991831.

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Forrest, David Alexander James. "The Muon Ionisation Cooling Experiment." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2839/.

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Outstanding areas of ambiguity within our present understanding of the nature and behaviour of neutrinos warrant the construction of a dedicated future facility capable of investigating the likely parameter space for the theta 1,3 mixing angle, the Dirac CP violating phase and clarifying the neutrino mass hierarchy. A number of potential discovery venues have been proposed including the beta beam, superbeam and neutrino factory accelerator facilities. Of these, the neutrino factory significantly outperforms the others. A neutrino factory will deliver intense beams of 10^21 neutrinos per year,
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Back, Trevor. "Ionisation induced collapse of minihaloes." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7608.

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The first stars, galaxies and black holes in the universe produced large quantities of ionising UV radiation; forming H II regions in the neutral gas before the Epoch of Reionisation (EoR). These ionisation fronts will have come into contact with overdensities in the surrounding Intergalactic Medium (IGM), including haloes which were in the process of collapse. Previous studies have shown that the feedback processes on these secondary haloes can either disrupt the gas, or induce further cooling from the formation of molecular hydrogen. The ionising source will eventually die and create a defun
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Arcidiacono, C. "Ionisation studies by positron impact." Thesis, University College London (University of London), 2006. http://discovery.ucl.ac.uk/1445268/.

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Differential studies of positron impact ionisation have been performed to understand the energy shift (Kover et al., 2001) of 1.6eV between the theoretical and measured energy spectrum of the ejected electron in the triply-differential cross-section, d*o +1 dE_dQ_dQ+, at 50eV incident energy on H2. Firstly, an absolute energy calibration has been carried out to check for possible contact potential effects in the determination of Kover et al. (2001). Secondly, D2 and He have been investigated at the same residual kinetic energy as in Kover et al. (2001) to probe the occurrence of molecular diss
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Ong, Siok Lan. "Impact ionisation in AlInP photodiodes." Thesis, University of Sheffield, 2012. http://etheses.whiterose.ac.uk/3381/.

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Books on the topic "Ionisation"

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Hau, Jörg. Ionisation bei Atmosphärendruck. Deutscher Universitätsverlag, 1994. http://dx.doi.org/10.1007/978-3-663-14609-4.

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Jarvis, Gary K. Ionisation phenomena in perfluorocarbons. University of Birmingham, 1997.

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Hamilton, Gavin. Negative air ionisation in buildings. Building Services Research and Information Association, 1985.

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Lockyer, N. P. Laser ionisation mass spectrometry of biomolecules. UMIST, 1995.

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1936-, Payne M. G., ed. Principles and applications of resonance ionisation spectroscopy. A. Hilger, 1988.

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Smith, S. M. Sputtered neutral mass spectometry using electron beamanddischarge post ionisation. UMST, 1994.

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Pavey, N. L. Ionisation water treatment: For hot and cold water services. Building Services Research and Information Association, 1996.

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Gates, Paul Jonathan. Matrix-assisted laser desorption/ionisation mass spectrometry of saccharides. typescript, 1995.

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Giannakopulos, Anastassios E. Matrix-assisted laser desorption/ionisation collisions of bio-molecules. typescript, 1994.

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universitet, Uppsala, ed. Single and double ionisation of free molecules and condensed matter. Uppsala University, 1991.

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Book chapters on the topic "Ionisation"

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Gross, Jürgen H. "Ionisation." In Massenspektrometrie. Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-58635-8_6.

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Gross, Jürgen H. "Elektrospray-Ionisation." In Massenspektrometrie. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-8274-2981-0_12.

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Gross, Jürgen H. "Chemische Ionisation." In Massenspektrometrie. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-8274-2981-0_7.

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Muir, Bryan, and Alan Nahum. "Ionisation Chambers." In Handbook of Radiotherapy Physics, 2nd ed. CRC Press, 2021. http://dx.doi.org/10.1201/9780429201493-20.

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Hau, Jörg. "Einleitung." In Ionisation bei Atmosphärendruck. Deutscher Universitätsverlag, 1994. http://dx.doi.org/10.1007/978-3-663-14609-4_1.

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Hau, Jörg. "Experimenteller Teil." In Ionisation bei Atmosphärendruck. Deutscher Universitätsverlag, 1994. http://dx.doi.org/10.1007/978-3-663-14609-4_2.

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Hau, Jörg. "Die Ionenoptik." In Ionisation bei Atmosphärendruck. Deutscher Universitätsverlag, 1994. http://dx.doi.org/10.1007/978-3-663-14609-4_3.

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Hau, Jörg. "Interface-Entwicklung." In Ionisation bei Atmosphärendruck. Deutscher Universitätsverlag, 1994. http://dx.doi.org/10.1007/978-3-663-14609-4_4.

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Hau, Jörg. "Charakterisierung des Elektrosprays und des Interface." In Ionisation bei Atmosphärendruck. Deutscher Universitätsverlag, 1994. http://dx.doi.org/10.1007/978-3-663-14609-4_5.

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Hau, Jörg. "Einige Anwendungen der Elektrospray-Massenspektrometrie." In Ionisation bei Atmosphärendruck. Deutscher Universitätsverlag, 1994. http://dx.doi.org/10.1007/978-3-663-14609-4_6.

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Conference papers on the topic "Ionisation"

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Aman, Fazlul, Usman Muhammad, Normiza Mohamad Nor, and Miszaina Osman. "Determination of Ionisation Radii for Various Soil Mixtures." In 2024 Multimedia University Engineering Conference (MECON). IEEE, 2024. https://doi.org/10.1109/mecon62796.2024.10776406.

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Rajeev, P. P., M. Gertsvolf, P. B. Corkum, and D. M. Rayner. "Cold avalanche ionisation." In 11th European Quantum Electronics Conference (CLEO/EQEC). IEEE, 2009. http://dx.doi.org/10.1109/cleoe-eqec.2009.5196341.

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Li, K. F., D. S. Ong, J. P. R. David, et al. "Low Noise Avalanche Photodetectors." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cfg9.

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Avalanche photodetectors (APDs) for 1.0 to 1.6μm wavelengths are known to be more sensitive than p-i-n photodiodes because of the internal multiplication provided by impact ionisation. However the multiplication process also produces avalanche noise which impairs the signal to noise ratio and limits sensitivity at high values of multiplication. The widely used theory of McIntyre[1] shows that the excess noise factor, F, falls for a small (≪1) ratio of ionisation coefficients k=β/α, where α is the ionisation coefficient of the initiating carrier.
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Richards, D., and J. G. Leopold. "Classical ghosts in quantal microwave ionisation." In The Sixteenth International Conference on the Physics of Electronic and Atomic Collisions. AIP, 1990. http://dx.doi.org/10.1063/1.39267.

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APOLLONIO, M. "The Muon Ionisation Cooling Experiment - MICE." In Proceedings of the 10th Conference. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812819093_0071.

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BRAY, I., D. V. FURSA, A. S. KADYROV, and A. T. STELBOVICS. "RECENT PROGRESS IN ATOMIC IONISATION THEORY." In Statistical Physics, High Energy, Condensed Matter and Mathematical Physics - The Conference in Honor of C. N. Yang'S 85th Birthday. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812794185_0048.

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Kotre, C. J. "Tomographic imaging of ionisation in gases." In IEE Colloquium on Advances in Electrical Tomography. IEE, 1996. http://dx.doi.org/10.1049/ic:19960849.

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Hee Seo, M. G. Pia, P. Saracco, and Chan Hyeong Kim. "Ionisation models for nano-scale simulation." In 2010 IEEE Nuclear Science Symposium and Medical Imaging Conference (2010 NSS/MIC). IEEE, 2010. http://dx.doi.org/10.1109/nssmic.2010.5873721.

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Rogers, Chris. "A Demonstrator for Muon Ionisation Cooling." In NuFACT 2022. MDPI, 2023. http://dx.doi.org/10.3390/psf2023008037.

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James, Keith, Rui Chen, and James Turner. "Ionisation and Ionisation Rate of a Two-Stroke HCCI Engine Fuelled with E85 for Control Feedback." In SAE 2010 World Congress & Exhibition. SAE International, 2010. http://dx.doi.org/10.4271/2010-01-1247.

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Reports on the topic "Ionisation"

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Rogers, Chris. Beam Dynamics in a Muon Ionisation Cooling Channel. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/983633.

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Barry, M., D. Shipley, and G. Bass. Calculating electron perturbation factors for Roos and NACP-02 ionisation chambers. National Physical Laboratory, 2023. http://dx.doi.org/10.47120/npl.ir63.

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Groot Wassink, Hans, and Annemieke Hol. Effect van BiPolaire Plasma Ionisatie technologie van Faton op concentraties ammoniak en fijnstof in een vleesvarkensstal : Resultaten van een ‘proof of concept’. Wageningen Livestock Research, 2023. http://dx.doi.org/10.18174/643751.

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