Laser Induced Nano and Micro Structures of Molybdenum Surface Applied in Multistage Depressed Collector for Secondary Electron Suppression
Source abstract
Abstract
The laser processing molybdenum metal surface method was first proposed to enhance the efficiency of multistage depressed collectors (MDCs). In this study, the secondary electron yield (SEY), surface geometrical morphologies and chemical states of laser processed Mo metal samples were characterized. For the first time, the effects of laser parameters and incident angle of primary electrons on the SEY property of laser induced nano and micro structures of molybdenum surface were investigated. The influence rule of laser processing patterns, power, pitch spacing, scanning speed on surface morphologies and SEY were systematically explored. A maximum SEY of laser processed Mo metal less than one was achieved. The Mo 3d and O 1s core level spectra of Mo metal before and after laser processing were analyzed in this study. Furthermore, the corresponding oxidation states of Mo as well as the relative distribution were elucidated.
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Research context
OpenAlex topics: Electron and X-Ray Spectroscopy Techniques · Laser-induced spectroscopy and plasma · Advanced Materials Characterization Techniques
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Affiliations
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Funding
China Postdoctoral Science Foundation · the National Natural Science Foundation for the Youth of China · Fundamental Research Funds for the Central Universities · Shaanxi Province Postdoctoral Science Foundation · the key project of Intergovernmental International Scientific and Technological Innovation Cooperation in China · National Natural Science Foundation of China
References (36)
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1. Wu, C., Pagonakis, I.G., Illy, S., Gantenbein, G., and Jelonnek, J. (2016, January 19–21). 3D simulation of a realistic multistage depressed collector for high-power fusion gyrotrons. Proceedings of the 2016 IEEE International Vacuum Electronics Conference (IVEC), Monterey, CA, USA.10.1109/IVEC.2016.7561797 ↗
2. Wu, C., Pagonakis, I.G., Illy, S., Thumm, M., Gantenbein, G., and Jelonnek, J. (2016, January 14–16). Preliminary studies on multistage depressed collectors for fusion gyrotrons. Proceedings of the 2016 German Microwave Conference (GeMiC), Bochum, Germany.10.1109/GEMIC.2016.7461632 ↗
3. Curren, A.N., Long, K.J., Jensen, K.A., and Roman, R.F. (1993, January 5–8). An effective secondary electron emission suppression treatment for copper MDC electrodes. Proceedings of the IEEE International Electron Devices Meeting, Washington, DC, USA.
4. Ion beam treatment of potential space materials at the NASA Lewis Research Center10.1016/0257-8972(92)90254-8 ↗
5. Performance of computer designed small-size multistage depressed collectors for a high-perveance traveling wave tube
6. Secondary emission electron characteristics of molybdenum-masked, ion-textured OFHC Copper
7. Ion surface modification for space TWT multistage depressed collectors10.1016/j.apsusc.2008.07.088 ↗
8. Huang, T., Cao, Q., Liu, J., Gong, D., Li, S., Yang, Z., and Li, B. (2018, January 24–26). A multistage depressed collectors design tool for traveling wave tubes based on non-dominated sorting genetic algorithm II. Proceedings of the 2018 IEEE International Vacuum Electronics Conference (IVEC), Monterey, CA, USA.10.1109/IVEC.2018.8391481 ↗
9. Mistry, C., Chakraborty, S., Arya, S., Latha, A.M., Roy, A., and Ghosh, S.K. (2018, January 24–26). A Study of Thermal Behavior of Travelling Wave Tube. Proceedings of the 2018 IEEE International Vacuum Electronics Conference (IVEC), Monterey, CA, USA.10.1109/IVEC.2018.8391594 ↗
10. Pagonakis, I.G., Wul, C., Ell, B., Avramidis, K.A., Gantenbein, G., Illy, S., Thumm, M., and Jelonnek, J. (2018, January 9–14). Progress in the development of a multistage depressed collector system for high power gyrotrons. Proceedings of the 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, Japan.10.1109/IRMMW-THz.2018.8509991 ↗
11. Glyavin, M., Manuilov, V., and Morozkin, M. (2018, January 9–14). Two-stage Energy Recovery System for DEMO Gyrotron. Proceedings of the 2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, Japan.10.1109/IRMMW-THz.2018.8510139 ↗
12. Wang, Z., Xu, X., Gong, Y., Duan, Z., Wei, Y., Gong, H., and Liu, H. (2017, January 19–22). A non-axisymmetric structure multistage depressed collector for sheet beam VEDs. Proceedings of the 2017 Progress in Electromagnetics Research Symposium-Fall (PIERS-FALL), Singapore.10.1109/PIERS-FALL.2017.8293171 ↗
13. Secondary electron emission suppression of multistage vacuum depressed collector in space traveling tube by Mo ion deposition
14. James, J., and Dayton, A. (1998, January 17–21). A review of the suppression of secondary electron emission from the electrodes of multistage collectors. Proceedings of the ISDEIV. 18th International Symposium on Discharges and Electrical Insulation in Vacuum (Cat. No. 98CH36073), Eindhoven, The Netherlands.
15. Low secondary electron yield engineered surface for electron cloud mitigation10.1063/1.4902993 ↗
16. The effect of air exposure on SEY and surface composition of laser treated copper applied in accelerators10.1109/TNS.2018.2863238 ↗
17. Effects of laser surface modification on secondary electron emission of copper10.1109/TPS.2010.2102750 ↗
18. Study on the effect of laser parameters on the SEY of aluminum alloy10.1109/TNS.2019.2898922 ↗
19. Secondary electron emission10.1016/S0081-1947(08)60728-6 ↗
20. A new examination of secondary electron yield data10.1002/sia.2107 ↗
21. Secondary electron emission in the scanning electron microscope10.1063/1.332840 ↗
22. The secondary electron emission yield for 24 solid elements excited by primary electrons in the range 250–5000 eV: A theory/experiment comparison10.1002/sca.20124 ↗
23. Automatic measurement of secondary electron emission characteristics of TaC, TiC and ZrC10.1088/0022-3727/2/11/308 ↗
24. Angular dependence of the ion-induced secondary-electron yield from solids10.1103/PhysRevB.24.3749 ↗
25. Secondary-electron yields and their dependence on the angle of incidence on stainless-steel surfaces for three energetic ion beams10.1103/PhysRevA.61.042901 ↗
26. Secondary electron emission yields from PEP-II accelerator materials10.1016/S0168-9002(01)00704-5 ↗
27. Secondary electron emission on space materials: Evaluation of the total secondary electron yield from surface potential measurements10.1109/TPS.2011.2172636 ↗
28. Electrochromic Molybdenum Trioxide thin film preparation and characterization10.1021/cm00011a004 ↗
29. Characterization and stability of electrochromic MoO3 thin films prepared by electrodeposition10.1149/1.2050004 ↗
30. An electrochromic device (ECD) cell characterization on electron beam evaporated MoO3 films by intercalating/deintercalating the H+ ions10.1016/j.cap.2005.12.001 ↗
31. Local character of many-body effects in X-ray photoemission from transition-metal compounds: NaxWO310.1103/PhysRevLett.34.738 ↗
32. Many-body line shape in x-ray photoemission from metals10.1103/PhysRevLett.35.53 ↗
33. Theoretical and Experimental Study of the Electronic Structures of MoO3 and MoO210.1021/jp9093172 ↗
34. Valizadeh, R., Malyshev, O.B., Wang, S., Sian, T., Gurran, L., Goudket, P., Cropper, M.D., and Sykes, N. (2016, January 1). Low secondary electron yield of laser treated surfaces of copper, aluminium and stainless steel. Proceedings of the 7th International Particle Accelerator Conference (IPAC’16), Busan, Korea.
35. Reduction of secondary electron yield for E-cloud mitigation by laser ablation surface engineering10.1016/j.apsusc.2017.02.013 ↗
36. Secondary electron emission yields from the J-PARC RCS vacuum components10.1016/j.vacuum.2005.11.052 ↗