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Study on the light output nonuniformity of $PbWO_{4}$ crystal
This paper presents measurements on the light output nonuniformity of a full size PbWO/sub 4/ crystal, which will be used in the electromagnetic calorimeter (ECAL) of the CMS detector. It makes use of a /sup 22/Na radioactive source and the coincidence method. With the help of the convolution fittin...
| Autores principales: | , , , , , , , |
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| Lenguaje: | chi |
| Publicado: |
2001
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/516884 |
| _version_ | 1780897675607015424 |
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| author | Shao Ming Xu Tong Liu Ming Chang Wang Cong Rong Ruan Li Juan Chen Hong Fang Pan Xiao Hui Wang Cong Zhou |
| author_facet | Shao Ming Xu Tong Liu Ming Chang Wang Cong Rong Ruan Li Juan Chen Hong Fang Pan Xiao Hui Wang Cong Zhou |
| author_sort | Shao Ming |
| collection | CERN |
| description | This paper presents measurements on the light output nonuniformity of a full size PbWO/sub 4/ crystal, which will be used in the electromagnetic calorimeter (ECAL) of the CMS detector. It makes use of a /sup 22/Na radioactive source and the coincidence method. With the help of the convolution fitting method, it is possible to make measurements of the light output nonuniformity of the crystal. The effect of depolishing one of the lateral faces of the crystal on the nonuniformity has been studied. The slope of the nonuniformity curve decreases with increasing roughness. When the roughness reaches R/sub s/=(1.49+or-0.27) mu m the nonuniformity curve meets the requirement of CMS-ECAL. (7 refs). |
| id | cern-516884 |
| institution | Organización Europea para la Investigación Nuclear |
| language | chi |
| publishDate | 2001 |
| record_format | invenio |
| spelling | cern-5168842019-09-30T06:29:59Zhttp://cds.cern.ch/record/516884chiShao MingXu TongLiu Ming ChangWang Cong RongRuan Li JuanChen Hong FangPan Xiao HuiWang Cong ZhouStudy on the light output nonuniformity of $PbWO_{4}$ crystalDetectors and Experimental TechniquesThis paper presents measurements on the light output nonuniformity of a full size PbWO/sub 4/ crystal, which will be used in the electromagnetic calorimeter (ECAL) of the CMS detector. It makes use of a /sup 22/Na radioactive source and the coincidence method. With the help of the convolution fitting method, it is possible to make measurements of the light output nonuniformity of the crystal. The effect of depolishing one of the lateral faces of the crystal on the nonuniformity has been studied. The slope of the nonuniformity curve decreases with increasing roughness. When the roughness reaches R/sub s/=(1.49+or-0.27) mu m the nonuniformity curve meets the requirement of CMS-ECAL. (7 refs).oai:cds.cern.ch:5168842001 |
| spellingShingle | Detectors and Experimental Techniques Shao Ming Xu Tong Liu Ming Chang Wang Cong Rong Ruan Li Juan Chen Hong Fang Pan Xiao Hui Wang Cong Zhou Study on the light output nonuniformity of $PbWO_{4}$ crystal |
| title | Study on the light output nonuniformity of $PbWO_{4}$ crystal |
| title_full | Study on the light output nonuniformity of $PbWO_{4}$ crystal |
| title_fullStr | Study on the light output nonuniformity of $PbWO_{4}$ crystal |
| title_full_unstemmed | Study on the light output nonuniformity of $PbWO_{4}$ crystal |
| title_short | Study on the light output nonuniformity of $PbWO_{4}$ crystal |
| title_sort | study on the light output nonuniformity of $pbwo_{4}$ crystal |
| topic | Detectors and Experimental Techniques |
| url | http://cds.cern.ch/record/516884 |
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