title: Design and development of indirectly heated solid cathode for strip type electron gun.
abstract: Design analysis of a high power indirectly heated solid cathode (for a 200 kW, 45 kV, and 270 degrees bent strip type electron gun) has been presented. The design approach consists of simulation followed by extensive experimentation with different cathode configurations. The preferred cathode is of trapezoidal section (8 x 4 x 2 mm(3)) with an emitting area of 110 x 4 mm(2) made up of tantalum operating at about 2500 K. The solid cathode at the operating temperature of 2500 K generated a well defined electron beam. Electromagnetic and thermomechanical simulation is used to optimize the shape of the beam. Thermal modeling has also been used to analyze the temperature and stress distribution on the electrodes. The simulation results are validated by experimental measurement.
authors.affiliation: Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.
authors.forename: Namita
authors.initials: N
authors.lastname: Maiti
authors.forename: S
authors.initials: S
authors.lastname: Mukherjee
authors.forename: Bhunesh
authors.initials: B
authors.lastname: Kumar
authors.forename: U D
authors.initials: UD
authors.lastname: Barve
authors.forename: V B
authors.initials: VB
authors.lastname: Suryawanshi
authors.forename: A K
authors.initials: AK
authors.lastname: Das