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An investigation on the surface/subsurface defects in potassium dihydrogen phosphate crystals after fly-cutting

  • School of Mechatronics Engineering, Harbin Institute of Technology
  • Harbin Institute of Technology
  • University of New South Wales

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Potassium dihydrogen phosphate (KDP) crystals play an important role in the laser ignition facility of inertial confinement fusion (ICF) due to its unique large size and transparency. However, the laser damage threshold (LDT) of KDP crystal components is far below the intrinsic threshold that the band structure of a perfect crystal should provide. It has been considered that the surface/subsurface defects of a KDP component have a significant effect on the low LDT. This paper investigates the surface fogging phenomenon when a KDP is machined by a dry diamond fly-cutting. The subsurface damage was detected with the aid of the grazing incidence X-ray diffraction (GIXD) method. It was found that the subsurface structure changed from the KDP single crystal to a lattice misaligned structure due to the fly-cutting.

Original languageEnglish
Title of host publication8th International Symposium on Advanced Optical Manufacturing and Testing Technologies
Subtitle of host publicationAdvanced Optical Manufacturing Technologies
EditorsLi Yang, Oltmann Riemer, Yongjian Wan, Shengyi Li, Wenhan Jiang
PublisherSPIE
ISBN (Electronic)9781628419184
DOIs
StatePublished - 2016
Event8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, AOMATT 2016 - Suzhou, China
Duration: 26 Apr 201629 Apr 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9683
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, AOMATT 2016
Country/TerritoryChina
CitySuzhou
Period26/04/1629/04/16

Keywords

  • KDP crystals
  • Subsurface damage
  • Surface fogging
  • Ultra-precision machining

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