X-ray Micro-Imaging Technique and Its Application to Micro-Bubbles in an Opaque Tube

X-ray Micro-Imaging 기법 소개 및 불투명 튜브 내부의 마이크로 버블 가시화 연구

  • 이상준 (포항공과대학교, 기계공학과) ;
  • 김석 (포항공과대학교, 기계공학과 대학원) ;
  • 백부근 (포항공과대학교, 기계공학과 대학원)
  • Published : 2002.11.01


Imaging techniques using x-ray beam at high energies (>6KeV) such as contact radiography, projection microscopy, and tomography have been used to nondestructively discern internal structure of objects in material science, biology, and medicine. This paper introduces the x-ray micro-imaging method using 1B2 micro-probe line of PAL (Pohang Accelerator Laboratory). Cross-sectional information on low electron density materials can be obtained by probing a sample with coherent synchrotron x-ray beam in an in-line holography setup. Living organism such as plants, insects are practically transparent to high energy x-rays and create phase shift images of x-ray wave front. X-ray micro-images of micro-bubbles of $20\~120\;{\mu}m$ diameter in an opaque tube were recorded. Clear phase contrast images were obtained at Interfaces between bubbles and surrounding liquid due to different decrements of refractive index.