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Scintillation Counters and Photomultiplier Tubes

Learning Objectives

Understand the basic operation of CROP scintillation

  counters and photomultiplier tubes (PMTs) and their

  use in measuring cosmic ray air showers

Understand how light is generated in a scintillator

Understand how light is transmitted to a PMT

Understand how a PMT generates an electric signal

Be able to hook up a scintillation counter to its high

  voltage and an oscilloscope for viewing signals

Be able to identify light leaks in a scintillation counter

Be able to observe scintillation counter signals using

  an oscilloscope and identify cosmic ray muons

Be able to discuss scintillation counter performance

  in terms of gain, efficiency and attenuation length

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