| 31. | The light is focused onto the photocathode of a photomultiplier tube that triggers an electron avalanche.
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| 32. | We apply pressure tests to the photomultiplier tubes.
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| 33. | The fluorescence from the sample is then collected by a high-sensitivity detector, such as a photomultiplier tube.
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| 34. | They're called photomultiplier tubes, and they're sunk several kilometers deep into the ice at the South Pole.
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| 35. | Photomultiplier tubes, too, are often used for increasing the intensity of the output signal to a usable level.
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| 36. | Are the photomultiplier tubes operated continuously?
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| 37. | This statement in the first paragraph of the photomultiplier tube article struck me as possibly outdated and unsubstantiated:
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| 38. | The water tanks were sandwiched between three scintillator layers which contained 110 five-inch ( 127 mm ) photomultiplier tubes.
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| 39. | A : The glass used in the photomultiplier tubes is only several millimeters thick, and very weak against shock.
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| 40. | Notice the two technicians and the size of each photomultiplier tube ( enhanced by the big lens assembly ).
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