Relevant bibliographies by topics / Secondary-emission cathode

Academic literature on the topic 'Secondary-emission cathode'

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Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Secondary-emission cathode"

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Lee, Ha Rim, Da Woon Kim, Alfi Rodiansyah, Boklae Cho, Joonwon Lim, and Kyu Chang Park. "Investigation of the Effect of Structural Properties of a Vertically Standing CNT Cold Cathode on Electron Beam Brightness and Resolution of Secondary Electron Images." Nanomaterials 11, no. 8 (July 26, 2021): 1918. http://dx.doi.org/10.3390/nano11081918.

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Carbon nanotube (CNT)-based cold cathodes are promising sources of field emission electrons for advanced electron devices, particularly for ultra-high-resolution imaging systems, due to their high brightness and low energy spread. While the electron field emission properties of single-tip CNT cathodes have been intensively studied in the last few decades, a systematic study of the influencing factors on the electron beam properties of CNT cold cathodes and the resolution of the secondary electron images has been overlooked in this field. Here, we have systematically investigated the effect of the structural properties of a CNT cold cathode on the electron beam properties and resolution of secondary electron microscope (SEM) images. The aspect ratio (geometric factor) and the diameter of the tip of a vertically standing CNT cold cathode significantly affect the electron beam properties, including the beam size and brightness, and consequently determine the resolution of the secondary electron images obtained by SEM systems equipped with a CNT cold cathode module. Theoretical simulation elucidated the dependence of the structural features of CNT cold cathodes and electron beam properties on the contribution of edge-emitted electrons to the total field emission current. Investigating the correlations between the structural properties of CNT cold cathodes, the properties of the emitted electron beams, and the resolution of the secondary electron images captured by SEM equipped with CNT cold cathode modules is highly important and informative as a basic model.
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Wang, Jinshu, Wei Liu, Zhiyuan Ren, Fan Yang, Yiman Wang, and Meiling Zhou. "Secondary electron emission of Y2O3–Mo cermet cathode." Materials Research Bulletin 45, no. 3 (March 2010): 324–28. http://dx.doi.org/10.1016/j.materresbull.2009.12.004.

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Radwan, Samah I., H. El-Khabeary, and A. G. Helal. "Study of the secondary electron emission coefficient using disc and conical electrodes." Canadian Journal of Physics 94, no. 12 (December 2016): 1275–81. http://dx.doi.org/10.1139/cjp-2016-0334.

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In this work, glow discharge is formed by similar disc and conical electrode shapes from aluminum material at constant anode–cathode gap distance equal to 10 cm. The breakdown voltage and discharge current against the pressure × distance are measured at different pressures. The secondary electron emission coefficient is calculated using Townsend’s secondary ionization coefficient equation. A comparison is made between the breakdown voltage, discharge current, and secondary electron emission coefficient using disc and conical anode–cathode electrodes. Hence with a product of pressure and distance equal to 6 Torr cm, the secondary electron emission coefficient value of conical shape is higher than for the disc shape.
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Boldasov, V. S., A. I. Kuz'michev, D. S. Fillipychev, and A. Yu Shabarov. "Nitrogen gas-discharge electron source with secondary-emission cathode." Radiophysics and Quantum Electronics 37, no. 4 (April 1994): 319–25. http://dx.doi.org/10.1007/bf01046033.

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Li, H. Y., Jin Shu Wang, Mei Ling Zhou, and Xin De Bai. "New Style Thin Film Cathode Materials of Rare Earth Oxide Sintered by Spark Plasma Sintering (SPS)." Key Engineering Materials 280-283 (February 2007): 553–56. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.553.

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The molybdenum powder doped with rare earth oxide was processed by powder metallurgy method and a new style thin film cathode material was firstly processed by Spark Plasma Sintering (SPS) method in this paper. The secondary emission property of such kind of cathode materials were studied, the maxim secondary emission coefficient after the material was activated at 1600°C reached to 3.84 about double that of traditional cathode materials application in magneto. The microstructure, element analysis and phase constitution of materials before and after the secondary emission property was measured were studied through SEM, EDAX and XRD. The results show that a rare earth layer about 5um thickness was created after the material was activated at 1600°C. The material grain size is about 1 um or even smaller and the distribution of elements in such materials is even.
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Suvorov, A. N., V. D. Naumenko, and V. A. Myand. "Selecting the Starter Cathode for the Pulsed Magnetron with a Cold Secondary-Emission Cathode." Telecommunications and Radio Engineering 59, no. 10-12 (2003): 73–79. http://dx.doi.org/10.1615/telecomradeng.v59.i1012.90.

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Yusop, Umira Asyikin, Hamimah Abdul Rahman, Suraya Irdina Abdullah, and Dedikarni Panuh. "Effect of Milling Process and Calcination Temperature on the Properties of BSCF-SDC Composite Cathode." Key Engineering Materials 791 (November 2018): 74–80. http://dx.doi.org/10.4028/www.scientific.net/kem.791.74.

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The ionic conductivity, super conductivity, ferroelectricity, and magnetic resistance of barium strontium cobalt ferrite (BSCF) make it a good solid cathode material. This study aims to investigate the influence of milling process and calcination temperature on the behaviour of nanocomposite cathode BSCF–samarium-doped ceria (SDC). The BSCF–SDC composite powders were mixed using two milling processes, namely, wet milling and dry milling. The composite cathode powders were mixed through wet milling by high-energy ball milling at 550 rpm for 2 hours. For dry milling, the powders were milled at 150 rpm for 30 minutes. The powders then underwent calcination at 900 °C, 950 °C, 1050 °C, and 1150 °C for 2 hours. The composite cathodes were examined on the basis of phase and microstructure through field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD), respectively. In conclusion, the selection of suitable milling process and calcination temperature is important in eliminating secondary phases in BSCF–SDC composite cathodes and in enhancing their properties.
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Li, Jing, Qiu Ting Yu, Yun Dong Cao, Xiao Ming Liu, and Chong Xu. "A Microscopic Study of Before-Arc Process in Metal Vapor Plasma's Proximal Cathode Region. Part II the Influence of Macroscopic Parameters on the Proximal Cathode Region." Applied Mechanics and Materials 325-326 (June 2013): 1343–46. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.1343.

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The moment of vacuum breaker contacts opening to arc creating process is an unbalanced gaseous breakdown process. This before-arc process is the foundation of studying arc process. The mechanism of the metal vapor arc is different from other gas medium and contains complex electrode process. The proximal cathode region is the important area for vacuum arc forming and it is affected by many factors. The influences of the different electrode separations, different secondary emission coefficient on electronic density, electronic temperature and electric potential, were analysed in this paper. The simulation results show that the change of electrode separations barely impacts the thickness of sheath and the decrease of electrode separations will lead to the decrease of electronic energy near the cathode sheath. The increase of secondary electron emission will increase charged particles energy, which is the important condition of forming cathode sheath.
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Qi Shikai, 漆世锴, 王小霞 Wang Xiaoxia, 罗积润 Luo Jirun, 赵世柯 Zhao Shike, 李云 Li Yun, and 赵青兰 Zhao Qinlan. "Secondary electron emission coefficient of metal doping W-base alloy cathode." High Power Laser and Particle Beams 26, no. 12 (2014): 123006. http://dx.doi.org/10.3788/hplpb20142612.123006.

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Avtomonov, N. I., D. M. Vavriv, and S. V. Sosnytsky. "Theoretical study of cold start of magnetrons with secondary emission cathode." Radioelectronics and Communications Systems 53, no. 1 (January 2010): 1–6. http://dx.doi.org/10.3103/s0735272710010012.

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Dissertations / Theses on the topic "Secondary-emission cathode"

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Wu, Qiong. "Measurements and studies of secondary electron emission of diamond amplified photo cathode." [Bloomington, Ind.] : Indiana University, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337275.

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Thesis (Ph.D.)--Indiana University, Dept. of Physics, 2008.
Title from PDF t.p. (viewed on Jul 29, 2009). Source: Dissertation Abstracts International, Volume: 69-12, Section: B, page: 7588. Adviser: Shyh-Yuan Lee.
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Ayzatskiy, N., A. Dovbnya, V. Zakutin, N. Reshetnyak, V. Romas'ko, I. Chertishchev, V. N. Boriskin, V. Mitrochenko, A. B. Galat, and I. Khodak. "Experimental investigation on the time characteristics of an electron beam formed in the magnetron gun with a secondari-emission cathode." Thesis, Национальный научный центр "Харьковский физико-технический институт" (ННЦ ХФТИ), 2007. http://openarchive.nure.ua/handle/document/9244.

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Tai-Yuan, Wu. "PREPARATION AND CHARACTERIZATION OF CATHODE MATERIALS FOR LITHIUM ION SECONDARY BATTERIES AND LUMINESCENT MATERIALS FOR FIELD EMISSION DISPLAYS." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1307200617301200.

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Wu, Tai-Yuan, and 吳岱原. "PREPARATION AND CHARACTERIZATION OF CATHODE MATERIALS FOR LITHIUM ION SECONDARY BATTERIES AND LUMINESCENT MATERIALS FOR FIELD EMISSION DISPLAYS." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/93458065250990360119.

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碩士
國立臺灣大學
化學工程學研究所
94
Li1.03Co0.15Mn1.82O4 powders as cathode materials used in lithium-ion battery were synthesized using an ultrasonic spray pyrolysis process. As the time increased at 750oC heating, the crystallinity of the powders enhanced. The nanometered primary particles were aggregated into sphere-like secondary particles. The surface area of the heated samples decreased with an increase in the heating time. During the high C-rate tests, the sample heated for 4 h revealed 87% capacity retention at 60C-rate related to 0.1C. The electrochemical performance of the prepared Li1.03Co0.15Mn1.82O4 powders depends on not only the crystallinity but also the surface area. The sample heated for 4 h may fit this requirement and it exhibited good rate capability. Secondly, Sr2CeO4 phosphors were prepared via the microwave-assisted solvothermal method with post-heating. The blue emission was obtained under an excitation wavelength of 280 nm. Compared with the solid-state method, the powder derived by the microwave-polyol method had higher luminescence intensity. Deconvoluted excitation and emission spectra were also investigated in order to analyze the band structure of Sr2CeO4. Smaller Stokes shift of microwave-derived powders were also observed. Finally, ZnO:Zn phosphors were coated with SiO2 in order to modify the particle surface. The photoluminescence properties show a great enhancement due to the surface passivation. For further coatings the intensity decreased. The cathodoluminescence results showed a different trend. The depletion region of the particle surface determines the CL intensity.
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Book chapters on the topic "Secondary-emission cathode"

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Kolanoski, Hermann, and Norbert Wermes. "Photodetectors." In Particle Detectors, 405–36. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198858362.003.0010.

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The chapter covers photodetectors for photons in the optical and near UV range (about 200 nm to 700 nm). Important for particle and astroparticle experiments are photodetectors which detect light generated in scintillation or Cherenkov detectors, for example. The detection of photons always starts with the generation of an electron by photoeffect at a photocathode. The photoelectron can then be either multiplied in a photomultiplier tube by secondary electron emission or the cathode could be the surface of a semiconductor detector; both techniques can also be combined in hybrid photodetectors. A relatively new semiconductor detector is the silicon photomultiplier using an avalanche operation mode to obtain sufficiently large signals. In the last section the different photodetectors are compared and are assigned to typical applications according to their properties.
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"Secondary emission cathodes." In Introduction to the Physics of Electron Emission, 487–524. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119051794.ch32.

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Conference papers on the topic "Secondary-emission cathode"

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Djubua, B. Ch, and O. V. Polivnikova. "Metal-alloyed “cold” secondary emission cathode." In 2017 Eighteenth International Vacuum Electronics Conference (IVEC). IEEE, 2017. http://dx.doi.org/10.1109/ivec.2017.8289674.

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Wang, Jinshu, Wei Liu, Fei Gao, Yiman Wang, and Meiling Zhou. "Secondary emission property of CeO2-Y2O3-Mo cathode." In 2007 IEEE International Vacuum Electronics Conference. IEEE, 2007. http://dx.doi.org/10.1109/ivelec.2007.4283273.

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Jinshu Wang, Wei Liu, Fei Gao, Yiman Wang, and Meiling Zhou. "Secondary emission property of Y2O3-Lu2O3-Mo cathode." In 2008 IEEE International Vacuum Electronics Conference (IVEC). IEEE, 2008. http://dx.doi.org/10.1109/ivelec.2008.4556347.

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Li, Shengen, Tiechang Yan, Jinsheng Yang, Fengling Li, and Mingqing Ding. "Ka-band magnetron with cold secondary-emission cathode." In 2015 IEEE International Vacuum Electronics Conference (IVEC). IEEE, 2015. http://dx.doi.org/10.1109/ivec.2015.7223962.

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Djubua, B. Ch, and O. V. Polivnikova. "Metal-alloyed “cold” secondary emission cathode." In 2015 IEEE International Vacuum Electronics Conference (IVEC). IEEE, 2015. http://dx.doi.org/10.1109/ivec.2015.7223741.

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Kopot, M. A., and V. D. Yeryomka. "Secondary-Electron Multiplication Process in Magnetrons with Secondary Emission Cold Cathode." In 2007 17th International Crimean Conference "Microwave and Telecommunication Technology" (CriMiCo '2007). IEEE, 2007. http://dx.doi.org/10.1109/crmico.2007.4368681.

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Yeryomka, V., M. Kopot, O. Kulagin, S. Gritsaenko, V. Naumenko, and S. Suvorov. "Multicavity Magnetrons with Cold Secondary Emission Cathode: Achievements, Problems, Perspectives." In 2006 16th International Crimean Microwave and Telecommunication Technology. IEEE, 2006. http://dx.doi.org/10.1109/crmico.2006.256476.

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Vavriv, Dmytro M., Vasyliy D. Naumenko, Klaus Schuenemann, Vladymyr A. Markov, and Aleksandr N. Syvorov. "Advances in spatial-harmonic magnetrons with cold secondary-emission cathode." In 2017 47th European Microwave Conference (EuMC). IEEE, 2017. http://dx.doi.org/10.23919/eumc.2017.8230936.

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Kopot, M. A., V. D. Yeryomka, and V. P. Dzyuba. "3-D simulation of cooker magnetron with cold secondary emission cathode." In 2005 15th International Crimean Conference Microwave and Telecommunication Technology. IEEE, 2005. http://dx.doi.org/10.1109/crmico.2005.1564880.

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Naumenko, V. D., D. M. Vavriv, and K. Schunemann. "Spatial-harmonic magnetrons with cold secondary-emission cathode: Advances and challenges." In 2016 9th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW). IEEE, 2016. http://dx.doi.org/10.1109/msmw.2016.7538218.

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