Thermal analysis of heating structure for thermionic cathode electron gun
- 1. Key Laboratory of High Energy Raddiation Imaging Fundamental Science for National Defense, Tsinghua University, Beijing (China)
- 2. Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing (China)
Description
Some thermal analysis results of several heating structures for thermionic cathode electron gun by using ANSYS code and COMSOL code were presented in this paper, and some instructions for heating structure design were obtained. A series of heating structures of thermionic cathode were tested in experiments, verifying the results of the thermal analysis, and so an efficiency heating structure was attained. In this structure, at a heating power about 100 W, the temperature of cathode was more than 1900 K which meets at the working temperature required by Ir-Ce cathode. Under a temperature of 1800 K and the electric field on the cathode surface of 3.6 x 106 V/m, the Ir-Ce cathode gives a maximum emission current of 1.04 A and the emission current density of 13 A/cm2. (authors)
Additional details
Publishing Information
- Journal Title
- High Power Laser and Particle Beams
- Journal Volume
- 22
- Journal Issue
- 7
- Journal Page Range
- p. 1607-1609
- ISSN
- 1001-4322
INIS
- Country of Publication
- China
- Country of Input or Organization
- China
- INIS RN
- 43074981
- Subject category
- S43: PARTICLE ACCELERATORS;
- Descriptors DEI
- A CODES; C CODES; CATHODES; CERIUM; COMPUTER CODES; CURRENT DENSITY; DESIGN; EFFICIENCY; ELECTRIC CURRENTS; ELECTRIC FIELDS; ELECTRON GUNS; EMISSION; HEATING; IRIDIUM; SURFACES; TEMPERATURE RANGE 1000-4000 K; THERMAL ANALYSIS; THERMIONICS
- Descriptors DEC
- COMPUTER CODES; CURRENTS; ELECTRODES; ELEMENTS; METALS; PLATINUM METALS; RARE EARTHS; REFRACTORY METALS; TEMPERATURE RANGE; TRANSITION ELEMENTS
Optional Information
- Notes
- 4 figs., 6 refs.