Thermal Characteristics of Rotating Anode X-ray Tube with Emissivity in Aging Process for Digital Radiography



Lee, Seok Moon

  • 투고 : 2015.09.07
  • 심사 : 2015.09.22
  • 발행 : 2015.09.30


We investigated the thermal characteristics of rotating anode X-ray tube to develop it for digital radiography by using computer simulation. The target which is the area of the anode struck by electrons is the most important component to get a long life of X-ray tube. So we analyze the thermal characteristics of the target and rotor assembly according to their emissivity by using ANSYS transient thermal simulation and then compare with the measured data of the target temperature operating in aging process of X-ray tube. Especially, keeping the lead coated layer as the role of metal lubricant on ball bearing enables to prevent the noise in rotating anode. The simulation result showed that its temperature was under the melting point of the lead in X-ray tube for digital radiography with 1.2 mm large focal spot 0.6 mm small focal spot and 150 kV tube voltage. We also investigated the relationship between the diameter of the anode shaft and the temperature of the anode and rotor assembly. It has been confirmed that the smaller anode shaft could be good for the rotor thermal characteristics.


X-ray tube;Rotating anode;Rotor assembly;Emissivity;Thermal characteristics


  1. Walter Huda, Review of RADIOLOGIC PHYSICS Third edition, (Lippincott Williams & Wilkins, USA, 2010), pp. 17-26.
  2. A. Reyes-Mena, Charles Jensen, Erik Bard, D. Clark Turner and K. G. Erdmann, International Centre for Diffraction Data 2005, Advances in X-ray Anaysis, 48, pp. 204-209.
  3. L. M. N. Tavora, E. J. Morton, F. P. Santos and T. H. V. T. Dias, IEEE Transactions on nuclear science, 47, pp. 1493-1498 (2000).
  4. Lembit Salasoo, Louis P. Inzinna, Amy L. Linsebigler, Krystyna Truszkowska, IEEE, pp. 255-256 (2002).
  5. J. Rodney M. Aughan, IEEE Transactions on electron devices, ED-32, pp. 654-357 (1985).
  6. Incropera, DeWitt, Bergman and Lavine, Introduction to Heat Transfer 5th edition, (John Wiley & Sons, Inc., USA, 2007), pp. 3-13, 951-953.

피인용 문헌

  1. 1. Design, analysis and testing of x-ray tube for next generation x-ray machines vol.149, 2016, doi:10.5757/ASCT.2015.24.5.125


연구 과제 주관 기관 : Small and Medium Business Administration