节点文献
Reflectivity change of the first mirror exposed in HT-7
【作者】 鄢容; 陈俊凌; 陈聚; 丁锐; 朱大焕; 谢春意;
【Author】 YAN Rong CHEN Junling CHEN Ju DING Rui ZHU Dahuan XIE Chunyi Institute of Plasma Physics,Chinese Academy of Sciences,Hefei,Anhui 230031
【机构】 Institute of Plasma Physics,Chinese Academy of Sciences;
【摘要】 <正>First mirror is the reflect mirror in optic diagnostic system.More than 80 pieces of metal mirrors would be used in ITER diagnostic systems.The reliability of the optic signal depends largely on the surface performance of the mirrors.Tungsten (W)、molybdenum(Mo) and stainless steel(SS) are the three candidate metal mirrors. The present work describes the preliminary experiments of these three mirrors exposed in the vacuum chamber of the HT-7 tokamak during autumn plasma discharge in 2009. One SS mirror was mounted near the Thomson scattering diagnosis window(North) and the lower hybrid current drive(LHCD) system(South),the other W、Mo and SS mirrors were mounted near the ion cyclotron wave window in the HT-7 device.Before and after plasma exposure,the surface roughness、surface morphology and the reflectivity of all mirrors were observed and measured by atomic force microscope (AFM)、scanning electron microscope(SEM) and UV-visible spectrophotometer, respectively.All the mirrors have thin deposited layers with silicon(Si)、carbon(C)、oxygen(O) and boron(B) elements after exposure.The investigation on the surface morphology and reflectively of two SS mirror samples located in the North and South show that the site near the LHCD in the north is not fit as the location of the metal mirrors due to the degradation of irradiation environment.The compare of the reflectively change for W,Mo and SS mirrors located at same site shows that the Mo is better than the other as the mirror material due to the superior quality of the surface after exposure.All these results are advantages for the design of optical diagnosis system in the future.
【Abstract】 First mirror is the reflect mirror in optic diagnostic system.More than 80 pieces of metal mirrors would be used in ITER diagnostic systems.The reliability of the optic signal depends largely on the surface performance of the mirrors.Tungsten (W)、molybdenum(Mo) and stainless steel(SS) are the three candidate metal mirrors. The present work describes the preliminary experiments of these three mirrors exposed in the vacuum chamber of the HT-7 tokamak during autumn plasma discharge in 2009. One SS mirror was mounted near the Thomson scattering diagnosis window(North) and the lower hybrid current drive(LHCD) system(South),the other W、Mo and SS mirrors were mounted near the ion cyclotron wave window in the HT-7 device.Before and after plasma exposure,the surface roughness、surface morphology and the reflectivity of all mirrors were observed and measured by atomic force microscope (AFM)、scanning electron microscope(SEM) and UV-visible spectrophotometer, respectively.All the mirrors have thin deposited layers with silicon(Si)、carbon(C)、oxygen(O) and boron(B) elements after exposure.The investigation on the surface morphology and reflectively of two SS mirror samples located in the North and South show that the site near the LHCD in the north is not fit as the location of the metal mirrors due to the degradation of irradiation environment.The compare of the reflectively change for W,Mo and SS mirrors located at same site shows that the Mo is better than the other as the mirror material due to the superior quality of the surface after exposure.All these results are advantages for the design of optical diagnosis system in the future.
- 【会议录名称】 第十五届全国等离子体科学技术会议会议摘要集
- 【会议名称】第十五届全国等离子体科学技术会议
- 【会议时间】2011-08-08
- 【会议地点】中国安徽黄山
- 【分类号】TL631.24
- 【主办单位】中国力学学会等离子体科学与技术专业委员会、中国物理学会等离子体物理分会、中国核学会核聚变与等离子体物理学会、第十五届全国等离子体科学技术会议组委会