Frontiers in thermionic cathode research

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August undefined, 2024

WebDOI: 10.1109/TED.2024.2804484 Corpus ID: 21707998; Frontiers in Thermionic Cathode Research @article{Kirkwood2024FrontiersIT, title={Frontiers in Thermionic Cathode Research}, author={David M. Kirkwood and Steven J. Gross and Thomas John Balk and Matthew J. Beck and John H. Booske and Daniel Busbaher and Ryan Jacobs and Martin … Webfilament and the cathode, and a large percentage of the radiated filament power heats the cathode. The useful cathode diameter is approximately 1.9 cm. The measured perveance of the electron gun is the same as the design value. Measurements have been made of the beam current density and cathode

A Review of Sc-containing “Scandate” Thermionic Cathodes

WebDec 24, 2024 · In order to meet the requirements of high-frequency vacuum electronic devices with small size, high current density, and low working temperature, a kind of porous tungsten scandate cathode with micro-blade-type arrays was developed. The micro-blade-type arrays were fabricated by laser engraving technology. Subsequently, the cathode … WebThermionic energy conversion (TEC) is the direct conversion of heat into electricity by the mechanism of thermionic emission, the spontaneous ejection of hot electrons from a surface. Although the physical mechanism has been known for over a century, it has yet to be consistently realized in a manner practical for large-scale deployment. sun city hilton head golf app

Frontiers in Thermionic Cathode Research - 百度学术

WebThe basic concept of TEC is outlined in Figure 1 A. As heat is added to the emitter (cathode) and the emitter temperature rises, electrons have sufficient energy to escape the solid and move freely in the vacuum, … WebJul 1, 2024 · In addition, because the thermionic emission properties of impregnated SDCs strongly depend on the chemical compositions of the scandate impregnants ... Frontiers in thermionic cathode research. IEEE Trans. Electron. Dev., 65 (2024), pp. 2061-2071, 10.1109/ted.2024.2804484. View in Scopus Google Scholar [2] WebIn this first experimental demonstration of thermionic energy conversion utilizing a platinum element at 1,000°C, an efficiency of 1.5 × 10 −11 was reported and its magnitude mainly attributed to radiation losses, … sun city hilton head new models

A review on recent progress of thermionic cathode SpringerLink

Frontiers in Thermionic Cathode Research IEEE Journals …

WebApr 5, 2024 · Frontiers in Thermionic Cathode Research Abstract: The high electron emission resulting from low-work-function scandate-added dispenser cathodes has … WebApr 5, 2024 · Frontiers in Thermionic Cathode Research Authors: David M. Kirkwood Steven J. Gross Tim Balk Northwestern University Matthew J. Beck Abstract The high … sun city hilton head floor plansWebApr 10, 2024 · The brand-new, 80,000-square-foot Integrated Engineering Research Center provides space for research, design, construction and testing of technologies for particle physics research at Fermilab. Photo: Ryan Postel, Fermilab. Centrally located next to Fermilab’s iconic, 16-story Wilson Hall, the sustainably built center has two floors, with … sun city hilton head veterans association

"WebThe maximum current density belonged to the Ba-W cathode with the matrix porosity of 26.3%. At 1050 ℃, the off-point emission current density of Ba-W cathode reached 24.62 A/cm 2 , the corresponding zero-field current density and workfunction were 7.62 A/cm 2 and 1.95 eV, respectively. " - Frontiers in thermionic cathode research

Frontiers in thermionic cathode research

WebApr 5, 2024 · Frontiers in Thermionic Cathode Research IEEE Journals & Magazine IEEE Xplore Frontiers in Thermionic Cathode Research Abstract: The high electron emission resulting from low-work-function scandate-added dispenser cathodes has … The high electron emission resulting from low-work-function scandate-added … WebAug 5, 2024 · The cathode tube shown in Fig. 1 is surrounded by a coaxial sheathed heater and heat shield to raise the temperature of the tube and its internal thermionic electron emitter to emission temperatures, but heaterless …

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WebFrontiers in thermionic cathode research. DM Kirkwood, SJ Gross, TJ Balk, MJ Beck, J Booske, D Busbaher, ... IEEE Transactions on Electron Devices 65 (6), 2061-2071, 2024. 65: ... Scandate cathode surface characterization: Emission testing, elemental analysis and morphological evaluation. X Liu, Q Zhou, TL Maxwell, BK Vancil, MJ Beck, TJ Balk ... WebVSTC’s 120 acres in Ashburn, VA, are home to more than 20 degree and certificate programs and 17 research labs, centers and institutes. Here, researchers, faculty and …

WebApr 5, 2024 · The high electron emission resulting from low-work-function scandate-added dispenser cathodes has generated a great deal of interest and research since the late 1970s. Despite the reported high current density at low temperatures, scandate cathodes have not yet seen wide-scale industrial adoption due to poor emission uniformity, … WebT1 - Frontiers in Thermionic Cathode Research. AU - Kirkwood, David M. AU - Gross, Steven J. AU - Balk, Thomas John. AU - Beck, Matthew J. AU - Booske, John. AU - …

WebNov 27, 2024 · We found that under the typical thermionic cathode operating conditions of high temperature and low oxygen partial pressure, the most stable surface adsorbates are Ba–O species with compositions in the range of Ba 0.125 O–Ba 0.25 O per surface W atom, with O passivating all dangling W bonds and Ba creating work function-lowering surface … WebFeb 20, 2024 · Nanobeam electron diffraction confirmed that the crystal structure throughout W grains is body-centered cubic, indicating that they are metallic W and did not experience noticeable changes, even near the grain surfaces, as a result of the numerous complex chemical reactions that occur during cathode impregnation and activation. 3D …

WebNov 4, 2010 · The U.S. Department of Energy's Office of Scientific and Technical Information

WebSep 16, 2024 · The fundamental understanding of the electron emission of thermionic cathodes is that when the activating energy is injected into the cathode metal matrix … sun city hot waterWebAt the Howard Hughes Medical Institute, we believe in the power of individuals to advance science through research and science education, making discoveries that benefit … sun city hilton head sc community associationWeb@article{Kirkwood2024FrontiersIT, title={Frontiers in Thermionic Cathode Research}, author={David M. Kirkwood and Steven J. Gross and Thomas John Balk and Matthew J. … sun city hilton head woodshopWebOct 19, 2024 · Frontiers in Thermionic Cathode Research Article Apr 2024 IEEE T ELECTRON DEV David M. Kirkwood Steven J. Gross Tim Balk Joan E. Yater View … sun city holiday packages 2019WebApr 5, 2024 · Frontiers in Thermionic Cathode Research D. Kirkwood, S. J. Gross, +10 authors J. Yater Published 5 April 2024 Materials Science IEEE Transactions on Electron … sun city home tax service sun city azWebA vast neural tracing effort by a team of Janelia scientists has upped the number of fully-traced neurons in the mouse brain by a factor of 10. Researchers can now download and … sun city holidays packages sun city holidays for sale