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Review of Scientific Instruments / Volume 83 / Issue 2 / ARTICLES / Electronics; Electromagnetic Technology; Microwaves

Rev. Sci. Instrum. 83, 024701 (2012); http://dx.doi.org/10.1063/1.3680555 (4 pages)

Thermal-structural analysis of electron gun with control grid

Lieming Yao, Kai Zhang, Hailong Yu, Tao Huang, and Bin Li

School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China

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(Received 8 September 2011; accepted 5 January 2012; published online 1 February 2012)

Steady state thermal-structural analysis of electron guns is essential due to the requirement of high reliability in beam performance. Temperatures and displacements for all the components of an electron gun with a control grid are computed. Steady-state thermal analysis has been carried out for various cathode temperatures and various intercepted powers on the control grid to determine the temperature of the control grid. These results are verified experimentally based on measured results from an assembled electron gun. Structural analysis of the electron gun is used to evaluate the deformation of the inner electrodes under the hot condition. The results show that the thermal stress slightly changes the characteristics of the gun. The obtained thermal deformation data can be helpful to modify the design dimensions and assembly of an electron gun.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL ARRANGEMENTS
  3. THERMAL ANALYSIS
  4. INTERCEPTED POWER OF THE CONTROL GRID
  5. THERMAL STRAIN ANALYSIS
  6. EFFECT OF THERMAL STRAIN ON CHARACTERISTICS OF GUN
  7. CONCLUSION

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KEYWORDS, PACS, and IPC

Keywords

electron guns, thermal analysis

PACS

  • 84.47.+w

    Vacuum tubes

  • 81.70.Pg

    Thermal analysis, differential thermal analysis (DTA), differential thermogravimetric analysis

International Patent Classification (IPC)

  • H01J1/00

    Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps

  • H01J29/48

    Electron guns

  • H01J37/06

    Electron sources; Electron guns

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3680555

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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Figures (10) Tables (4)

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