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Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems

Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems

Published on: May 26, 2019

Design and development of indirectly heated solid cathode for strip type electron gun.

Namita Maiti¹, S Mukherjee, Bhunesh Kumar

¹Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India.

The Review of Scientific Instruments

|February 2, 2010

Summary

A tantalum solid cathode was designed and tested for high-power electron guns. Optimized through simulation and experiments, it reliably generates a well-defined electron beam at 2500 K.

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Area of Science:

Physics
Materials Science
Engineering

Background:

High-power electron guns require stable and efficient electron sources.
Solid cathodes offer potential advantages in durability and performance over traditional designs.

Purpose of the Study:

To design and analyze a high-power indirectly heated solid cathode for a specific electron gun.
To optimize cathode geometry and operating parameters using simulation and experimental validation.

Main Methods:

Electromagnetic and thermomechanical simulations were employed for design optimization.
Extensive experimentation with various cathode configurations was conducted.
Thermal modeling was used to analyze temperature and stress distributions.

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Main Results:

A preferred trapezoidal tantalum cathode (8x4x2 mm³) operating at ~2500 K was identified.
The optimized cathode successfully generated a well-defined electron beam.
Simulation results were validated through experimental measurements.

Conclusions:

The designed solid cathode meets the requirements for high-power electron guns.
Simulation-based design followed by experimental validation is an effective approach for cathode development.
The study provides a validated design for a high-performance electron beam source.