Photocathode e-beam
WebApr 11, 2024 · The photocathode was first evaluated in a three-electrode configuration with an iridium oxide (IrO x) counter electrode and a Ag/AgCl reference electrode under AM 1.5 G 1-sun illumination at an ... WebAmong metal photocathodes, the highest QE obtained with a 266-nm (4.66 eV) laser beam has been 4 × 10 −3 for a Mg photocathode, whereas the QE for Cu is 5 × 10 −4. Alkali …
Photocathode e-beam
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Webcopper photocathode, which produced a 50-pC electron beam that was also modulated in the terahertz regime. The incident drive laser pulse was measured with a scanning cross-correlator [4] (Fig. 1). Figure 1: Cross-correlation measurement of 266-nm drive laser pulse incident on photocathode (Head of pulse on right). WebJul 20, 2024 · The measurements of the photocathode response time in this case are essential. With an approach of the interferometer-type pulse splitter deep integration into …
Webphotocathode anode cathode Laser IN e beam OUT I mentioned other factors can limit lifetime: Field emission, photocathode material, laser wavelength, laser radial position on photocathode, beam optics, gun voltage The electrostatic center Electron beam makes ions, that are attracted to the EC of the photocathode WebNov 11, 2024 · The InGaN photocathode-based electron gun achieved a total beam operation time of 1300 h at 15 μA beam current with a downtime rate of 4% and a current …
WebApr 13, 2024 · The photocathode electron source [1, 2] is widely used as the injector of the advanced accelerator, such as the X-ray free-electron laser facility (XFEL) [].The photocathode electron source could provide ultra-low beam emittance and easily controlled beam length. These features make it critical for realizing related physics goal. WebAug 8, 2024 · These photocathode structures were grown using molecular beam epitaxy and achieved quantum effi-ciencies exceeding 15% and electron spin polarization of about 75% when illuminated with near ...
WebFeb 17, 2024 · This paper compares different photocathodes that are applicable for electron injector systems and summarizes the development in cathode technology in the last …
WebJun 4, 1998 · These properties make possible a number of new electron beam tools, including a high-throughput multibeam maskless wafer exposure tool. Simulations show that up to 10 μA of current at 50 kV can be delivered to the wafer in such a system with a total spot diameter of 70 nm. ... In this system a low quantum efficiency photocathode … description of an effective managerWebSynthesis of the multialkali photocathodes by molecular beam epitaxy V.V.Balanyuk*, A.S.Chernikov**, V.F.Krasnov*, S.L.Musher*, V.E.Ryabchenko*, A.M.Prokhorov**, ... chs inc. - energy - refinery supply - homeWebA new cathode stalk has been designed to eliminate multipacting in the choke-joint. At the same time, a first beam test was carried out in May this year, and dark current from the photocathode was measured in the faraday cup. The SRF cavity was tested after the beam commissioning and shows no-degradation of the performance. description of an eagleWebApr 1, 2024 · @article{osti_1452805, title = {Demonstration Of Fast, Single-Shot Photocathode QE Mapping Method Using Mla Pattern Beam}, author = {Wisniewski, E. E. and Conde, M. and Doran, D. S. and Gai, W. and Jing, C. and Liu, W. and Power, J. G. and Whiteford, C. and Gao, Q. and Ha, G. and Halavanau, A. and Piot, P.}, abstractNote = … description of an evil characterWebA 1.5-cell SRF cavity with E acc of 13–14 MV/m is adopted in this new version (see Figure 6) . A K 2 CsSb photocathode is driven by a temporally- and spatially-shaped drive laser. The beam optics are also carefully designed for optimized emittance compensation . The gun is intended to produce bunch charge of 100 pC with rms emittance as low ... description of an esl teacherchs inc grandin ndWebMar 1, 2024 · Moreover, a 4.4 ns pulsed e-beam with a 4.7 mA beam current was generated, and a 5 × 5 multielectron beam with 12% uniformity was then obtained. The advantages of … description of an event class 9