عنوان مقاله [English]
نویسندگان [English]چکیده [English]
This paper presents the design of a thermionic electron gun with two different geometries, flat cathode and spherical cathode.The purpose of this research is to answer the question of which type of electron gun is suitable for industrial electrostatic accelerators. CST Studio software was used to design the guns. The desired specification in the design of a suitable thermionic gun, the maximum current of 50 milliamper and the voltage 5 to 10 kilovolt, is selected for use in the dynamitron accelerator. The beam current, the waist beam radius, the waist beam position and the perveance of a flat cathode gun and spherical cathode gun were 49 and 49.8 mA, 3.2 and 0.45 mm, 36 and 24.3mm, 0.138 and 0.0498 μperv, respectively. Since the electron guns used in the industry have a perveance between 0.1 to 1 μperv therefore, an electron gun with a flat cathode with 0.138 μperv is more suitable. On the other hand, it is easier and less costly to make it. That is why the gun with a flat cathode was chosen and its final dimensions are presented.
1. S. Ahmadiannamin, F. Abbasi Davani, et all in: 5th International Particle Accelerator, Simulation Study of Electron Gun for Six Mev Linac for X-Ray cargo Inspection, 3847-3849 (JACoW, Dresden, Germany, IPAC2014),.
2. L. Marton, Methodes of experimental physisies, (Academic press, new York, 1967).
3. S. Ahmadian, M.Sc. thesis, Faculty of Nuclear Engineering, (2011) (in Persian).
4. A. Gilmour, principal traveling wave tubes, (Artech House. Inc, Norwood, 1941).
5. M. Moghbelalhossein, E. Bazvand, et all, Simulation of a Low Energy Electron Gun, Nucl Sci. and Tech, (2014) (in Persian).
6. S. Humpheries, Charged particle beam, (Dover Publications, New York, 2013).
7. M. Nazari, F. Abassi Davani, et all, in: Proceedings of IPAC,Design and Simulation of a Thermionic Electron Gun for a 1MeV Parallel Feed Cockcroft-Walton Industrial Accelerator, 1976-1978 (Busan, Korea, 2016).
8. D. Bhattacharjee, et al, Development of electron guns for linacs and dc accelerator, https://www. researchgate.net/publication/265107167.
9. H. Yazdanfar, M. Elahi, et all, in: New Materials National, Designing of Tungsten Filament as an Electron Source for Applying in Electron Gun (University of Tarbiat Modarres, Tehran, 2008) (in Persian).
10. J. Pierce, Traveling-Wave Tubes, 3 edition, 390-460 (D. Van Nostrand Company, Inc, 1950).
11. C. Karzmark, Medical electron accelerators, (McGRAW Hill, New York, 1993).
12. H. Wiedemann, Particle Accelerator Physics, 4th edit,(Springer, 2015).