caa a22 4500 445305142 CHVBK 20180317142610.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10762-011-9783-8 doi (NATIONALLICENCE)springer-10.1007/s10762-011-9783-8 Design and Simulation of Pole Piece for Focusing of Multi-beam Electron Gun [Elektronische Daten] [Ashok Nehra, L. Joshi, R. Gupta, Shivani Sharma, Y. Choyal, R. Sharma] The design of the aperture in the pole piece of a multi-beam confined-flow electron gun has been studied using the commercially available code OPERA 3D and validated the results using the CST particle studio, and the OmniTrak simulation tools. The results obtained by these tools are in good agreement with respect to the beam-waist radius and the throw of the electron gun. The square aperture proved to be a better option than circular aperture in providing the axisymmetric and uniform magnetic field. The shape and size of the pole piece have been optimized to enhance the laminarity of the electron beam using square aperture. Springer Science+Business Media, LLC, 2011 Multi-beam klystron nationallicence Electron gun nationallicence Confined-flow focusing nationallicence Solenoid nationallicence Pole piece nationallicence Nehra Ashok Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut Joshi L. Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut Gupta R. Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut Sharma Shivani Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut Choyal Y. School of Physics, DAV, Indore, India aut Sharma R. Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/6(2011-06-01), 793-800 1866-6892 32:6<793 2011 32 10762 https://doi.org/10.1007/s10762-011-9783-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10762-011-9783-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nehra Ashok Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut NATIONALLICENCE 700 1- Joshi L. Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut NATIONALLICENCE 700 1- Gupta R. Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut NATIONALLICENCE 700 1- Sharma Shivani Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut NATIONALLICENCE 700 1- Choyal Y. School of Physics, DAV, Indore, India aut NATIONALLICENCE 700 1- Sharma R. Microwave Tubes Division, Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research, 333031, Pilani, Rajasthan, India aut NATIONALLICENCE 773 0- Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/6(2011-06-01), 793-800 1866-6892 32:6<793 2011 32 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer