Academic literature on the topic 'Ionization current'

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Journal articles on the topic "Ionization current"

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Itoh, Haruo, Susumu Suzuki, and Nobuaki Ikuta. "Ionization Current in N2 Gas." IEEJ Transactions on Fundamentals and Materials 113, no. 1 (1993): 25–31. http://dx.doi.org/10.1541/ieejfms1990.113.1_25.

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Itoh, Haruo, Xiao Yong Hu, and Nobuaki Ikuta. "Ionization Current in Ne/Ar Mixtures." IEEJ Transactions on Fundamentals and Materials 108, no. 3 (1988): 125. http://dx.doi.org/10.1541/ieejfms1972.108.125.

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Gapeev, Alexei, Alberto Berton, and Daniele Fabris. "Current-controlled nanospray ionization mass spectrometry." Journal of the American Society for Mass Spectrometry 20, no. 7 (July 2009): 1334–41. http://dx.doi.org/10.1016/j.jasms.2009.03.007.

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Stoyanov, D. G. "Current-voltage characteristic of parallel-plane ionization chamber with inhomogeneous ionization." Journal of Instrumentation 2, no. 08 (August 24, 2007): P08007. http://dx.doi.org/10.1088/1748-0221/2/08/p08007.

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Ifa, Demian R., Chunping Wu, Zheng Ouyang, and R. Graham Cooks. "Desorption electrospray ionization and other ambient ionization methods: current progress and preview." Analyst 135, no. 4 (2010): 669. http://dx.doi.org/10.1039/b925257f.

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Brancaccio, Franco, Mauro S. Dias, and Marina F. Koskinas. "Automatic system for ionization chamber current measurements." Applied Radiation and Isotopes 61, no. 6 (December 2004): 1339–42. http://dx.doi.org/10.1016/j.apradiso.2004.03.001.

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Paracchini, C., and V. Dallacasa. "Impact ionization current in semi-insulating GaAs." Solid State Communications 69, no. 1 (January 1989): 49–52. http://dx.doi.org/10.1016/0038-1098(89)90024-0.

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Van, V., M. J. Deen, J. Kendall, D. S. Malhi, S. Voinigescu, and M. Schrofer. "DC extraction of the base and emitter resistances in polysilicon-emitter npn BJTs." Canadian Journal of Physics 74, S1 (December 1, 1996): 172–76. http://dx.doi.org/10.1139/p96-853.

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Five DC techniques of extracting the base and emitter resistances of polysilicon-emitter npn bipolar junction transistors (BJTs) are presented and compared. The five techniques include three previously published techniques and two new techniques, constant base current and IB–IE plane fitting. Application of the five methods to a 0.8 × 16 μm2 npn BJT shows that all but the method of impact ionization yield comparable Rc and Rbb values at high currents. The impact ionization method, which extracts Rc and Rbb in the impact ionization region and at low base currents, yields markedly different Rc and Rbb values, indicating that the values of the parasitic resistances depend on the current range over which the extraction is performed. Thus the choice of which method is best to use depends on the current range over which Rc and Rbb are to be measured, and the validity of the assumptions used in the method when applied to the device.
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Mah, K. R., F. W. Dalby, and C. W. Barnard. "Polarization dependence of resonant multiphoton ionizations on 1S0 and 1,3D2 states in atomic mercury." Canadian Journal of Physics 66, no. 1 (January 1, 1988): 1–6. http://dx.doi.org/10.1139/p88-001.

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The polarization dependences of some resonant multiphoton ionizations in atomic mercury have been measured with a broadband (bandwidth ≈ 1.5 cm−1) multimode dye laser at moderate light intensities (≈ 500 MW∙cm−2). The multiphoton processes studied were the absorption of four photons to a resonant 1S0, 1D2, or 3D2 level by one-photon ionization. Complete saturation of the one-photon ionization step results in the ionization of all atoms excited to the resonant level. Because of the saturation of the ionization step, the polarization dependence of the four-photon excitation to the resonant level is measured. The theory developed by Dalby et al. is shown to give good agreement with the experiment when it is used to calculate the polarization dependence of the multiphoton transition to the resonant level. For the 6d1D2 resonance, distortions in the polarization dependence and an unusual linewidth dependence on the light polarization were observed. We relate these observations to the alternating current Stark effect and to the production of the third harmonic of the laser light in the focal volume.
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Suzuki, Susumu, Haruo Itoh, Hisashi Sekizawa, and Nobuaki Ikuta. "Ionization Current in N2 Gas." IEEJ Transactions on Fundamentals and Materials 114, no. 12 (1994): 880–85. http://dx.doi.org/10.1541/ieejfms1990.114.12_880.

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Dissertations / Theses on the topic "Ionization current"

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Rivara, Nick. "IC Engine Control by Ionization Current Sensing." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510971.

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Eriksson, Lars. "Methods for Ionization Current Interpretation to be Used in Ignition Control." Thesis, Linköpings universitet, Fordonssystem, 1995. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-141637.

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It is desirable to measure engine performance for several reasons, e.g. when computing the spark advance setting in spark-ignited (SI) engines. There exists two methods, among others, of measuring the performance, such as measuring the pressure and the ionization current. Since the ionization current reflects the pressure, it is interesting to study if it is possible to extract information from the ionization current about the combustion and pressure. Three different algorithms for extracting information from the ionization current are studied. The first algorithm, ion peak, searches the \second peak" in the ionization signal. The second algorithm computes the centroid. In the third algorithm a model of the ionization signal structure is fitted to the ionization signal. The algorithms are tested in four operating conditions. The first algorithm uses the local information around the second peak and is sensitive to noise. The second algorithm uses a larger portion of the ionization signal, which is more stable. It provides promising results for engines with a clear post flame phase. The third algorithm, ion structure analysis, fits an ideal model to the ionization signal. The algorithm provides promising results, but the present implementation requires much computational effort.
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Lee, Hong-Wei. "Solid-State Impact-Ionization Multiplier." BYU ScholarsArchive, 2006. https://scholarsarchive.byu.edu/etd/1080.

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This dissertation presents an innovative solid-state current amplifier based on impact-ionization. Unlike avalanche photodetectors which use the same amplification principle, this device can be integrated with any external current source. A discrete amplifier was built on a silicon surface using standard CMOS fabrication processes including lithography, oxidation, ion implantation, diffusion, chemical wet etching, metal deposition, annealing, and rapid thermal processing. Testing was performed by connecting the device to a silicon photodiode, indium-gallium-arsenide photodiodes, and a function generator to demonstrate its compatibility with arbitrary current sources. Current gains above 100 along with pre-amplified leakage currents of less than 10 nA were measured. This amplifier can also be cascaded to achieve very high gains similar to the photomultiplier tube but with much smaller size and no vacuum environment required. Testing was done by amplifying the output signal from an external silicon photodiode. Current gains over 600 were measured when two amplifying devices were cascaded. Additionally, the gain saturation phenomenon of the amplifier due to the space-charge effect is investigated. The measured gain saturation is observed to match very well with the theoretical based predictions. We also present a design rule for obtaining high current gain from the cascaded structure without experiencing gain saturation. Initial bandwidth of the SIM when connected to a silicon photodiode was measured to be about 300 kHz. As we replace the photodiode by a function generator, the bandwidth improved to 450 kHz which is the frequency limit of the system. These results were made on the first generation of SIM devices. We discovered that the space-charge resistance Rsc plays a significant role in determining frequency response. In future generations of the device, we can begin with optimizing the device geometry to reduce this resistance. Also, we can reduce the size of the metal pad and increase the oxide layer thickness to further minimize the device capacitance for faster response. Because of the low-noise gain mechanism employed, this device is of potential interest to a variety of fields requiring high-sensitivity optical or electronic detection.
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Magnusson, Janek. "An Investigation of Maximum Brake Torque Timing based on Ionization Current Feedback." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-9506.

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For every operating condition of an internal combustion engine there exists an optimal spark timing, called maximum brake torque (MBT), which maximises the output torque and the efficiency of the engine. Traditionally MBT timing is implemented as an open-loop control where the ignition timing is found by using a combination of static lookup tables and sensor information. With a direct closed-loop control from the combustion process the performance of internal combustion engines could be improved. The thesis investigates if it is possible to estimate the MBT timing from the ionization current for every operating condition of a spark ignited engine where the operating conditions are defined by the engine parameters lambda, internal exhaust gas recirculation, engine load, engine speed and spark advance.

First an investigation of how much loss of torque an error from the MBT position corresponds to is made. Then the influence of the engine parameters on the shape of the ionization current was studied. Last different peak pressure position (PPP) estimating algorithms are presented and a new technique is developed where an engine operating point dependant part of the ionization current is used depending on the current operating condition of the engine. Two of the presented PPP estimating algorithms are then complemented with this technique and the results look promising.

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Kuipers, Winfred J. [Verfasser]. "Design, Fabrication and Characterization of a MEMS-Based Counter-Current Flame Ionization Detector / Winfred J. Kuipers." München : Verlag Dr. Hut, 2011. http://d-nb.info/1013526341/34.

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Claesson, Daniel. "Improved Experimental Agreement of Ionization and Pressure Peak Location by Adding a Dynamical NO-Model." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2462.

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Modelling combustion engines is an important tool in engine research. Development and modelling of ionization current has potential in developing virtual pressure sensors based on ionization measurements. Previous models has problem when predicting the true relationshipbetween the pressure peak location and ionization peak location, and both too early and too late predictions has been observed. An explanation for these discrepancies are provided and a model where the experimental mismatch has been reduced to less than one CAD is also presented. This is well within the measurement uncertainty.

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Ding, Yi. "Application de la chimiluminescence de flamme et du courant d’ionisation à la surveillance de l’état de combustion pour une chaudière à gaz domestique." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC039/document.

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Les variations de la composition des gaz naturels nécessitent un system de réglage automatique de la richesse de flamme pour des chaudières domestiques à gaz. Dans ce travail,deux solutions potentielles sont étudiées, à savoir la chimiluminescence de flamme et le courant d’ionisation. Des indicateurs de richesse sont déduits des signaux de chimiluminescence obtenus expérimentalement. L’impact de l’échange de chaleur entre la flamme et le brûleur sur des signaux de chimiluminescence est ensuite étudié. Une analyse est également faite des principaux facteurs pouvant perturber la caractérisation du signal de chimiluminescence. Le courant d’ionisation est ensuite étudié sur une flamme conique pour comprendre l’évolution de son intensité avec la position de sonde et avec les conditions de flamme. Il est montré ensuite que ces évolutions sont corrélées avec le changement de la distance entre la flamme et le brûleur. Enfin, une boucle de contrôle est développée pour démontrer la faisabilité d’un réglage automatique de richesse en exploitant le signal de chimiluminescence
The variations of natural gas composition call for an automatic equivalence ratio regulation system for domestic gas boilers. Two potential techniques for this purpose are investigated, i.e. the flame chemiluminescence and ionization current. Equivalence ratio indicators are inferred from the chemiluminescence signal based on the experiments. The investigation proceeds by examining effects of the flameburner heat exchange on the chemiluminescence signal. The interference of several disturbing factors for the chemiluminescence signal characterization is also analyzed. The flame ionization current is investigated on a conical flame to understand the evolution of its intensity with the probe position and flame conditions. These changes are then attributed to modifications of the distance between the flame base and the burner rim. Finally a control loop is developed to demonstrate the feasibility of equivalence ratio self-regulation with the chemiluminescence signal
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Paniz, Vitor. "Simulação elétrica do efeito de dose total em células de memória estática (SRAM)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/27264.

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Nesta dissertação é apresentado o estudo da célula SRAM estática de 6 transistores, com tecnologia CMOS, sendo utilizada em ambiente exposto à radiação. Foi verificado, através de simulação com o Hspice (HSPICE, 2009; KIME, 1998) e com a análise de Monte Carlo, o seu comportamento com relação à dose de ionização total (Total Ionization Dose, TID), a qual altera a tensão de limiar (threshold voltage, Vth) e a corrente de fuga, não sendo utilizada nenhuma técnica de fabricação especial para tolerância à radiação. Na simulação foi observado o comportamento da célula com relação ao tempo de atraso de escrita, à margem de ruído de leitura e ao consumo de energia. As simulações incluem as tecnologias de 130nm e 350nm sendo, portanto, possível comparar os efeitos de radiação citados em ambas, para verificar qual é a mais naturalmente resistente a radiação, verificando se está coerente com resultados divulgados na literatura. Para simular o efeito de dose, altera-se a tensão de limiar (threshold voltage, Vth) com a análise de Monte Carlo e, para a corrente de fuga, adiciona-se uma fonte de corrente entre o dreno e fonte de cada transistor. Os valores de Vth e corrente de fuga foram obtidos nas referências (HAUGERUD, 2005) para a tecnologia 130nm e (LACOE, 1998) para a tecnologia 350 nm. As simulações mostram que o comportamento foi coerente com resultados já conhecidos, em que a tecnologia mais antiga (350nm) tem alterações mais significativas do que a tecnologia mais atual, em relação à TID.
This work presents the study of the static RAM (SRAM) cell with 6 transistor, using CMOS technology, under radiation environment. The electrical behavior of the cell is evaluated using SPICE simulation (HSPICE, 2009; KIME, 1998) and applying Monte Carlo analysis. The effect of total ionization dose is analyzed through the modeling of threshold voltage shifts and leakage currents. The case study processes of this work do not use any special fabrication steps to make the circuit tolerant to radiation. The behavior of the cell related to write propagation time, read noise margin and energy consumption is evaluated through scripts written to support the simulation campaign. The simulations were performed for both 130nm and 350nm technologies, making possible to compare which one is more resistant to radiation. To further explore the dose effect in the case where the radiation does not affect all transistors in exactly the same way, the threshold voltage (Vth) of the transistors is varied randomly in the Monte Carlo analysis. To consider the leakage current, it is added a current source between drain and source of each transistor. The values of Vth and leakage current were obtained in reference (HAUGERUD, 2005) for the 130nm and in reference (LACOE, 1998) for the 350nm technology. The simulations show that the behavior was consistent with results already known, in which the older technology (350nm) is more significant changes then the most current technology, for the TID.
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Chiquet, Philippe. "Etude et modélisation des courants tunnels : application aux mémoires non volatiles." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4736/document.

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Les mémoires non-volatiles à grille flottante sont utilisées pour le stockage d'information sous la forme d'une charge électrique contenue dans la grille flottante d'un transistor. Le comportement de ces dispositifs mémoire est fortement lié aux propriétés de leur oxyde tunnel, qui permet à la fois le passage de cette charge lors d'opérations de programmation ainsi que sa rétention en l'absence d'alimentation électrique. Au cours de ce travail, des mesures de courant tunnel ont été réalisées sur des capacités semiconducteur-oxyde-semiconducteur de grande surface représentatives de la zone d'injection des cellules mémoire. L'application de pulses courts sur la grille de ces structures de test, au cours desquels le courant peut être mesuré en temps réel, a permis de mettre en évidence les principales propriétés transitoires et stationnaires pouvant affecter le fonctionnement des dispositifs mémoire. L'effet de la dégradation des oxydes tunnel, qui impacte le comportement des cellules mémoire lors des opérations de programmation et de la rétention, a été observé et interprété dans le cas d'un stress à tension constante. Les résultats obtenus sur les capacités de grande surface ont pu être utilisés dans le cadre d'une modélisation de cellules EEPROM
Floating gate non-volatile memory devices are used to store data under the form of an electric charge contained in the floating gate of a transistor. The behavior of these memory devices is strongly linked to the properties of their tunnel oxide, which allows the transit of this charge during write/erase operations as well as its retention while the transistor is not polarized. During this work, tunneling current measurements have been performed on large area semiconductor-oxide-semiconductor capacitors that are representative of the injection zone of memory cells. The application of short pulses to the gates of these test structures, during which the current can be measured as a function of time, allowed the observation of the main transient and steady-state properties that can affect the functioning of memory devices, The effect of tunnel oxide degradation, which impacts the behavior of memory cells during write/erase operations as well as data retention, has been observed and interpreted in the case of a constant voltage stress. The results obtained on large area capacitors have been used to model EEPROM cells
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BEZERRA, Gabriel Vidal Negreiros. "Análise de sistemas de aterramento com hastes concretadas submetidos a correntes impulsivas." Universidade Federal de Campina Grande, 2017. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/492.

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Submitted by Lucienne Costa (lucienneferreira@ufcg.edu.br) on 2018-04-25T17:58:53Z No. of bitstreams: 1 GABRIEL VIDAL NEGREIROS BEZERRA – DISSERTAÇÃO (PPGEE) 2017.pdf: 5032226 bytes, checksum: 900940f480110db5450f19583af7d19d (MD5)
Made available in DSpace on 2018-04-25T17:58:53Z (GMT). No. of bitstreams: 1 GABRIEL VIDAL NEGREIROS BEZERRA – DISSERTAÇÃO (PPGEE) 2017.pdf: 5032226 bytes, checksum: 900940f480110db5450f19583af7d19d (MD5) Previous issue date: 2017-03-30
CNPq
Neste trabalho é realizada uma avaliação da resposta impulsiva de aterramento com haste concretada, considerando o efeito da ionização do solo. Para isso, o aterramento foi representado e simulado utilizando uma ferramenta computacional de simulação em três dimensões por meio do método dos elementos finitos. A representação computacional, bem como a validação da mesma, foi feita tomando-se como base dados experimentais apresentados na literatura. O fenômeno da ionização do solo foi implementado ponto a ponto, utilizando o equacionamento do modelo dinâmico de ionização do solo, possibilitando que aterramentos com diferentes formatos geométricos sejam avaliados. Avaliou-se a impedância transitória de uma haste concretada padronizada para solos com diferentes resistividades. Além disso, procedeu-se com uma análise da resposta impulsiva da haste concretada para diferentes parâmetros geométricos, a saber: raio do concreto envolvente, comprimento vertical da haste concretada, comprimento vertical do concreto envolvente e profundidade da haste concretada em relação ao nível do solo. Por fim, propõem-se limites práticos e sugestões de dimensões para a haste concretada, de forma que a reposta impulsiva seja otimizada.
In this research, was performed an impulsive response evaluation of concrete encased groundings, considering de soil ionization effect. In order to achive this, the grouding was represented and simulated in three dimensions using a finite element method software. The computational representation and validation were performed using experimental data presented in the literature. The soil ionization effect was implemented in a point form, allowing evaluate groudings with different geometric formats. It was studied the transient impedance of a standard concrete encased rod placed in soils with different resistivity values. Furthermore, was performed a transient response analysis for different geometric parameters of the concrete encased rod, namely: the concrete radius, the vertical length of the concrete encased rod, the vertical length of the concrete encased rod, the surrounding concrete and the depth of the concrete encased rod in relation to the soil surface. Finally, practical limits and suggested dimensions for the concrete encased rod are proposed, in order to optimize the impulse response.
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Books on the topic "Ionization current"

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Law, Jonathan, and Richard Rennie, eds. A Dictionary of Chemistry. Oxford University Press, 2020. http://dx.doi.org/10.1093/acref/9780198841227.001.0001.

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Over 5,000 entries Clear and authoritative, this popular dictionary provides an invaluable guide to every aspect of chemistry and its related fields. Its coverage is broad, ranging from physical chemistry to biochemistry, and is informed by the most current research. Eight informative appendices supplement the text, as well as over 200 diagrams, graphs, and tables, to provide a useful visual aid for the more complex definitions. Now in its eighth edition, the dictionary has been fully revised, making it the most up-to-date reference work of its kind. Areas such as analytical chemistry, environmental chemistry, and organic chemistry have been expanded to reflect recent developments in the field. There are also 176 entirely new entries, including bioethanol, electron ionization, genome, and nanochemistry. With its comprehensive and reliable content, this dictionary is an essential resource for students and teachers of chemistry at every level.
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Ionizat͡s︡ii͡a︡, aėrozoli, ėlektrometrii͡a︡: Bibliograficheskiĭ ukazatelʹ nauchnykh publikat͡s︡iĭ Tartuskogo gosudarstvennogo universiteta za 1946-1985 gg. Tartu: Tartuskiĭ gos. universitet, 1986.

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A, Chutjian, and United States. National Aeronautics and Space Administration., eds. Detection of new dissociative electron attachment channels in NO. [Washington, DC: National Aeronautics and Space Administration, 1995.

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Book chapters on the topic "Ionization current"

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Lehovec, K. "Impact Ionization Breakdown of GaAs Current Limiters." In High-Speed Electronics, 127–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82979-6_24.

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Charron, Eric, Darian T. Stibbe, and Annick Suzor-Weiner. "Femtosecond ionization of CH3CN-NaI and CH3CN-Csl." In Current Developments in Atomic, Molecular, and Chemical Physics with Applications, 39–48. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0115-2_6.

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Hathiramani, DAG, Roland Trassl, Paul Scheier, and E. Salzborn. "Ionization and Fragmentation of Fullerene Ions by Electron Impact." In Current Developments in Atomic, Molecular, and Chemical Physics with Applications, 163–66. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0115-2_21.

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Aoki, Kazunori. "Hierarchy of Current Instabilities in the Impact Ionization Avalanche in Semiconductors." In Negative Differential Resistance and Instabilities in 2-D Semiconductors, 393–407. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2822-7_27.

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Duhr, Joël. "Intelligent Engine Control & Diagnostic Using the Ionization Current Sensing Technology." In Advanced Microsystems for Automotive Applications 99, 71–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-03838-3_6.

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Reames, Donald V. "Summary and Conclusions." In Solar Energetic Particles, 221–25. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-66402-2_10.

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AbstractIn this chapter we summarize our current understanding of SEPs, of properties of the sites of their origin and of the physical processes that accelerate or modify them. These processes can leave an indelible mark on the abundances of elements, isotopes, ionization states, anisotropies, energy spectra and time profiles of the SEPs. Transport of the ions to us along magnetic fields can impose new variations in large events or even enhance the visibility of the source parameters as the SEPs expand into the heliosphere. We lack physical models that can follow the complexity of SEP abundance variations.
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Kumar, Deepak, and Prateek Jain. "Double Gate Tunnel Field Effect Transistor with Extended Source Structure and Impact Ionization Enhanced Current." In Advances in Intelligent Systems and Computing, 973–80. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-5903-2_102.

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Avaria, G., M. Grisham, J. Li, F. G. Tomasel, V. N. Shlyapstsev, M. Busquet, M. Woolston, and J. J. Rocca. "Ionization of Xenon to the Nickel-Like Stage and Beyond in Micro-Capillary Plasma Columns Heated by Ultrafast Current Pulses." In Springer Proceedings in Physics, 147–53. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19521-6_19.

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Santos, Cledir, Paula Galeano, Reginaldo Lima Neto, Manoel Marques Evangelista Oliveira, and Nelson Lima. "MALDI-TOF MS and its requirements for fungal identification." In Trends in the systematics of bacteria and fungi, 119–40. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789244984.0119.

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Abstract Matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) is now used as a routine technique for the fast and reliable identification of fungi at the species level and, currently, it represents an important phenotypic methodology based on proteomic profiles. The main limitations to MALDI-TOF MS for fungal identification are related to sample quality (e.g. quality of biological material such as rigidity or pigmentation of cell walls), sample preparation (e.g. the myriad of sample preparation methodologies that deliver different data sets to different MALDI-TOF MS databases) and the databases themselves (e.g. the 'black-box' commercial databases). This chapter presents an overview and discussion of the use of MALDI-TOF MS for fungal identification. The major known limitations of the technique for fungal taxonomy, and how to overcome these, are also discussed.
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Kuleff, Alexander I. "Ultrafast electron dynamics as a route to explore chemical processes." In Current Trends in Atomic Physics, 343–66. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198837190.003.0009.

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These lecture notes give a concise overview of the problem of describing quantum-mechanically the correlated motion of electrons and nuclei in a molecule. The focus is put on the methodology allowing to study the ultrafast, pure electron dynamics triggered by ionization of a molecule. It is shown that due to the electron correlation the removal of an electron from a molecular orbital can create electronic coherences manifesting in the migration of the positive charge throughout the system on a few-femtosecond time scale; a phenomenon known as correlation-driven charge migration. Some interesting perspectives for designing schemes to influence the chemical reactivity of the molecule by manipulating the charge migration dynamics are also briefly discussed.
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Conference papers on the topic "Ionization current"

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Eriksson, Lars, Lars Nielsen, and Jan Nytomt. "Ignition Control by Ionization Current Interpretation." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1996. http://dx.doi.org/10.4271/960045.

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Estefanous, Fadi. "Modeling of Ion Current Signal in Diesel Combustion." In ASME 2013 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icef2013-19090.

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Ionization in internal combustion engines produces a signal indicative of in-cylinder conditions that can be used for the feedback electronic control of the engine, to meet production goals in performance, fuel economy and emissions. Most of the research has been conducted on carbureted and port injection spark ignition engines where the ionization mechanisms are well defined. A limited number of investigations have been conducted on ionization in diesel engines because of its complex combustion process. In this study, a detailed ionization mechanism is developed and introduced in a 3-D diesel cycle simulation computational fluid dynamics (CFD) code to determine the contribution of different species in the ionization process at different engine operating conditions. The CFD code is coupled with DARS-CFD, another module used to allow chemical kinetics calculations. The three-dimensional model accounts for the heterogeneity of the charge and the resulting variations in the combustion products. Furthermore, the model shows the effects of varying fuel injection pressure and engine load on the ion current signal characteristics. Ion current traces obtained experimentally from a heavy duty diesel engine were compared to the 3-D model results. The results of the simulation indicate that some heavy hydrocarbons, soot precursors play a major role, in addition to the role of NOx in ionization in diesel combustion.
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Keshav, Saurabh, Yurii Utkin, and Igor Adamovich. "Feedback Combustion Control Using Chemi-Ionization Current." In 46th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-1056.

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Lee, Anson, and Jan S. Pyko. "Engine Misfire Detection by Ionization Current Monitoring." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1995. http://dx.doi.org/10.4271/950003.

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Eriksson, Lars, Lars Nielsen, and Mikael Glavenius. "Closed Loop Ignition Control by Ionization Current Interpretation." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1997. http://dx.doi.org/10.4271/970854.

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Kuipers, W. J., and J. Mueller. "Planar micro flame ionization detector with minimized leak current." In TRANSDUCERS 2009 - 2009 International Solid-State Sensors, Actuators and Microsystems Conference. IEEE, 2009. http://dx.doi.org/10.1109/sensor.2009.5285701.

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Jarrett, Dean G., Shamith U. Payagala, Ryan Fitzgerald, Denis E. Bergeron, Jeffrey T. Cessna, Charles J. Waduwarage Perera, and Neil M. Zimmerman. "Ohm's Law Low-current Calibration System for Ionization Chambers." In 2020 Conference on Precision Electromagnetic Measurements (CPEM 2020). IEEE, 2020. http://dx.doi.org/10.1109/cpem49742.2020.9191784.

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Rawnsley, W. R., D. Smith, and T. Moskven. "A multiwire ionization chamber readout circuit using current mirrors." In Beam instrumentation. AIP, 1997. http://dx.doi.org/10.1063/1.52330.

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Pidin, S., N. Terao, T. Matsumoto, Y. Inoue, and M. Koyanagi. "An Accurate Impact Ionization Current Model for LDD SOI MOSFETs." In 1995 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 1995. http://dx.doi.org/10.7567/ssdm.1995.pc-10-10.

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Peron, L., A. Charlet, P. Higelin, B. Moreau, and J. F. Burq. "Limitations of Ionization Current Sensors and Comparison with Cylinder Pressure Sensors." In International Fuels & Lubricants Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-2830.

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Reports on the topic "Ionization current"

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Ellsworth, Jennifer L. Letter Report on 500 nA Pulsed Current from Field Ionization Source. Office of Scientific and Technical Information (OSTI), December 2013. http://dx.doi.org/10.2172/1248264.

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Hjalmarson, H. P., F. J. Zutavern, and G. M. Loubriel. An impact ionization model for optically-triggered current filaments in GaAs. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/434472.

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Jay R. Johnson and Hideo Okuda. Cross-Field Current Instabilities in Thin Ionization Layers and the Enhanced Aurora. Office of Scientific and Technical Information (OSTI), May 2008. http://dx.doi.org/10.2172/959386.

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Harold Schock, Farhad Jaberi, Ahmed Naguib, Guoming Zhu, and David Hung. High-Compression-Ratio; Atkinson-Cycle Engine Using Low-Pressure Direct Injection and Pneumatic-Electronic Valve Actuation Enabled by Ionization Current and Foward-Backward Mass Air Flow Sensor Feedback. Office of Scientific and Technical Information (OSTI), December 2007. http://dx.doi.org/10.2172/967307.

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