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Low intensity light fromdark environment
Each accelerated photoelectron causes theemission of hundreds more from the MCP.The electrons maintain the conformation ofthe incident photons.
D.C. 5000V
D.C. 300V
The secondary electrons are acceleratedjust sufficiently to excite the phosphorscreen.
(Not shown tilted)
Very thin layer of galliumarsenide photocathode releases 1 electron per photon.
Low energyphotoelectrons areaccelerated to a highenough energy to cause a secondary emission cascade.
Many more photons are emitted at the phosphor due to the immense number of incident electrons.
High intensity imageformed