phototube

[foh-tuh-toob, -tyoob]
noun Electronics.
an electron tube with a photosensitive cathode, used like a photocell.
Also called photoelectric tube.


Origin:
1925–30; photo- + tube

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World English Dictionary
phototube (ˈfəʊtəʊˌtjuːb)
 
n
a type of photocell in which radiation falling on a photocathode causes electrons to flow to an anode and thus produce an electric current

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Example sentences
After the scintillator is done being polished, it is ready to be glued to the
  phototube.
Phototube measures beam induced light emission with sub ns resolution.
Also, to study luminescence the phototube is replaced with a scanning
  spectrophotometer.
The baseline phototube design has a large gain so that signal to common mode
  noise should be large.
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