Design and development of permanent magnet based focusing lens for J-Band Klystron
- Microwave Tubes Division, Central Electronics Engineering Research Institute, Pilani (India)
Applying permanent magnet technology to beam focusing in klystrons can reduce their power consumption and increase their reliability of operation. Electromagnetic design of the beam focusing elements, for high frequency travelling wave tubes, is very critical. The magnitude and profile of the magnetic field need to match the optics requirement from beam dynamics studies. The rise of the field from cathode gun region to the uniform field region (RF section) is important as the desired transition from zero to peak axial field must occur over a short axial distance. Confined flow regime is an optimum choice to minimize beam scalloping but demands an axial magnetic field greater than 2 - 3 times the Brillouin flow field. This necessitates optimization in the magnet design achieve high magnetic field within given spatial constraints. Electromagnetic design and simulations were done using 3D Finite element method (FEM) analysis software. A permanent magnet based focusing lens for a miniature J-Band klystron has been designed and developed at Control Instrumentation Division, BARC. This paper presents the design, simulation studies, beam transmission and RF tests results for J Band klystron with permanent magnet focusing lens. (author)
- Research Organization:
- Bhabha Atomic Research Centre, Mumbai (India); Indian Vacuum Society, Mumbai (India)
- OSTI ID:
- 22597200
- Resource Relation:
- Conference: ISDEIV-2014: 26. international symposium on discharges and electrical insulation in vacuum, Mumbai (India), 28 Sep - 3 Oct 2014; Other Information: Country of input: India; 5 refs., 11 figs.; This record replaces 48041828; Related Information: In: Proceedings of the twenty sixth international symposium on discharges and electrical insulation in vacuum. V. 2| 392 p.
- Country of Publication:
- United States
- Language:
- English
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