They are often used in conjunction with scintillators and employ active materials such as cesium iodide, which is solar-blind. They typically require 
They are often used in conjunction with scintillators and employ active materials such as cesium iodide, which is solar-blind. They typically require operating voltages of several kilovolts(*) in order to generate photons through secondary emission when an electron strikes a dynode. For ten points, identify these light detectors which amplify an incoming signal by as much as 8 order of magnitude.
They are often used in conjunction with scintillators and employ active materials such as cesium iodide, which is solar-blind.
photomultiplier tube or PMT