Optical Properties of Thomson Scattering Diagnostics Lower Window Glass under Laser Irradiation

doi:10.3390/ma14112702

	Optical Properties of Thomson Scattering Diagnostics Lower Window Glass under Laser Irradiation
	Zhou, Jian 1,2; Zang, Qing 2; Zhao, Junyu 2; Xiao, Shumei 2; Che, Yong 2; Ren, Mengfang 2
刊名	MATERIALS
	2021-06-01
卷号	14
关键词	Thomson scattering laser irradiation glass transmittance
DOI	10.3390/ma14112702
通讯作者	Zang, Qing(zangq@ipp.ac.cn)
英文摘要	Tokamak diagnostic window glass is an indispensable optical medium in fusion research. The transmittance of the device affects the optical performance and accuracy of the diagnostic system. Especially, the window glass serves as the entrance of the light source while performing the sealing function for the active diagnosis method represented by Thomson scattering diagnostics. In this work, we studied the influence of the laser irradiation and tokamak discharge on the EAST (Experimental Advanced Superconducting Tokamak) Thomson scattering diagnostic borosilicate glass window. Using X-ray photoelectron spectroscopy (XPS) and Raman scattering, we found that carbon-based impurities in the device aggravated the film damage due to laser irradiation, reducing the performance of the coating of the glass. Besides, the laser and the various rays of tokamak discharge generated many point defects in the glass, increasing the light absorption of the glass. These two factors caused the glass transmittance to drop significantly (from 99.99% to 77.62%). In addition, the long-term laser irradiation primarily reduced the transmittance, while environmental rays had a minor impact on the same. This work provides valuable insights into the selection and effective use of glass in optics-based diagnostics.
资助项目	National Key R and D Program of China[2017YFE0301105]
WOS关键词	INDUCED DAMAGE ; RADIATION
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种	英语
出版者	MDPI
WOS记录号	WOS:000661617500001
资助机构	National Key R and D Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123790]
专题	中国科学院合肥物质科学研究院
通讯作者	Zang, Qing
作者单位	1.Anhui Jianzhu Univ, Sch Mat & Chem Engn, Hefei 230601, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Jian,Zang, Qing,Zhao, Junyu,et al. Optical Properties of Thomson Scattering Diagnostics Lower Window Glass under Laser Irradiation[J]. MATERIALS,2021,14.
APA	Zhou, Jian,Zang, Qing,Zhao, Junyu,Xiao, Shumei,Che, Yong,&Ren, Mengfang.(2021).Optical Properties of Thomson Scattering Diagnostics Lower Window Glass under Laser Irradiation.MATERIALS,14.
MLA	Zhou, Jian,et al."Optical Properties of Thomson Scattering Diagnostics Lower Window Glass under Laser Irradiation".MATERIALS 14(2021).