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Uniformity Measurements Across the Area of the CMS ECAL Avalanche Photodiodes
The photodetectors which will read out the scintillation light generated in the lead tungstate crystals in the barrel part of the CMS electromagnetic calorimeter are avalanche photodiodes (APDs). Scanning the APD's active area with a collimated light spot, the spatial uniformity of their quantu...
| Autores principales: | , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2004
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/791369 |
| _version_ | 1780904543713755136 |
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| author | Godinovic, Nikola Puljak, Ivica Soric, Ivica Antunovic, Zeljko Dzelalija, Mile Deiters, Konrad Ingram, Quentin Renker, Dieter Musienko, Yuri |
| author_facet | Godinovic, Nikola Puljak, Ivica Soric, Ivica Antunovic, Zeljko Dzelalija, Mile Deiters, Konrad Ingram, Quentin Renker, Dieter Musienko, Yuri |
| author_sort | Godinovic, Nikola |
| collection | CERN |
| description | The photodetectors which will read out the scintillation light generated in the lead tungstate crystals in the barrel part of the CMS electromagnetic calorimeter are avalanche photodiodes (APDs). Scanning the APD's active area with a collimated light spot, the spatial uniformity of their quantum efficiency and gain has been measured at four different operating gains. Details of the APD surface structure are examined by scanning with a fine light spot. These details help to explain the difference between the bias voltage for a given gain when the full APD area is illuminated and when only the central part is illuminated. |
| id | cern-791369 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2004 |
| record_format | invenio |
| spelling | cern-7913692019-09-30T06:29:59Zhttp://cds.cern.ch/record/791369engGodinovic, NikolaPuljak, IvicaSoric, IvicaAntunovic, ZeljkoDzelalija, MileDeiters, KonradIngram, QuentinRenker, DieterMusienko, YuriUniformity Measurements Across the Area of the CMS ECAL Avalanche PhotodiodesDetectors and Experimental TechniquesThe photodetectors which will read out the scintillation light generated in the lead tungstate crystals in the barrel part of the CMS electromagnetic calorimeter are avalanche photodiodes (APDs). Scanning the APD's active area with a collimated light spot, the spatial uniformity of their quantum efficiency and gain has been measured at four different operating gains. Details of the APD surface structure are examined by scanning with a fine light spot. These details help to explain the difference between the bias voltage for a given gain when the full APD area is illuminated and when only the central part is illuminated.CMS-NOTE-2004-018oai:cds.cern.ch:7913692004-08-20 |
| spellingShingle | Detectors and Experimental Techniques Godinovic, Nikola Puljak, Ivica Soric, Ivica Antunovic, Zeljko Dzelalija, Mile Deiters, Konrad Ingram, Quentin Renker, Dieter Musienko, Yuri Uniformity Measurements Across the Area of the CMS ECAL Avalanche Photodiodes |
| title | Uniformity Measurements Across the Area of the CMS ECAL Avalanche Photodiodes |
| title_full | Uniformity Measurements Across the Area of the CMS ECAL Avalanche Photodiodes |
| title_fullStr | Uniformity Measurements Across the Area of the CMS ECAL Avalanche Photodiodes |
| title_full_unstemmed | Uniformity Measurements Across the Area of the CMS ECAL Avalanche Photodiodes |
| title_short | Uniformity Measurements Across the Area of the CMS ECAL Avalanche Photodiodes |
| title_sort | uniformity measurements across the area of the cms ecal avalanche photodiodes |
| topic | Detectors and Experimental Techniques |
| url | http://cds.cern.ch/record/791369 |
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