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Property of Carbon Layer for C/W Multilayer Mirror

C/W 다층박막 거울의 탄소층 특성 Property of Carbon Layer for C/W Multilayer Mirror

  • Park, Byoung-Hun (Department of Radiological Science, Catholic University of Daegu) ;
  • Choi, Hyung-Wouk (Department of Radiological Science, Catholic University of Daegu) ;
  • Oh, Sun-Ju (Department of Radiological Science, Catholic University of Daegu) ;
  • Yoon, Kwon-Ha (Center for Radiation Image Technology, Jeonbuk Technopark) ;
  • Chon, Kwon-Su (Department of Radiological Science, Catholic University of Daegu)
  • 박병훈 (대구가톨릭대학교 방사선학과) ;
  • 조형욱 (대구가톨릭대학교 방사선학과) ;
  • 오선주 (대구가톨릭대학교 방사선학과) ;
  • 윤권하 (전북테크노파크 방사선영상기술센터) ;
  • 천권수 (대구가톨릭대학교 방사선학과)
  • Received : 2010.09.18
  • Accepted : 2010.12.13
  • Published : 2010.12.31

Abstract

Multilayer mirrors are very useful for applications of high energy X-ray. X-rays of high energy require very small thickness, a few nanometers, in the d-spacing of a multilayer mirror. Each layer is composed of a multilayr mirror influences to interfacial roughness or interdiffusion which gives rise to degrade specular reflection. Carbon layer of 1 nm thick in a C/W multilayer mirror of 3.25 nm d-spacing was examined. Carbon as well as tungsten layers were very uniform, and there was no micro-structure in carbon layers. However, interdiffusion between carbon and tungste layers was observed by a transmission electron microscope.

고 에너지 X선을 이용하는 응용에서 다층박막 거울은 매우 유용하다. 고 에너지 X선은 매우 짧은 다층박막 두께주기를 요구한다. 두께주기가 수 나노미터로 매우 짧기 때문에 다층박막을 형성하는 층들은 서로 계면 거칠기나 상호확산에 영향을 준다. 3.25nm의 두께주기를 갖는 C/W 다층박막 거울에서 1nm의 탄소 층의 특성을 살펴보았다. 탄소의 두께가 1nm로 매우 얇아도 텅스텐과 탄소의 층들은 매우 균일하게 증착되었으며, 탄소층은 미세구조가 없는 미정질 구조를 보였다. 투과전자현미경의 회절 영상을 통해서 텅스텐과 탄소의 상호확산이 발생했다는 것을 알수있었다.

Keywords

References

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