secondary emission
Impact-released particle spray
Secondary emission is the release of electrons from a surface when struck by other particles, typically electrons or ions.
The phenomenon occurs in vacuum tubes, particle detectors, and photomultipliers, where it can be harnessed to amplify signals.
In other contexts, secondary emission is an unwanted effect that degrades performance: The device suffered from secondary emission at high voltages.
electronics
Electrode current exits through
- vacuum tubeEvacuated electronic amplifier
- photoelectronLight-expelled negative particle
- thermionicHeat-emitted electron phenomenon
- avalanche effectInput change spreads throughout output
physics
Channeling resources across systems
- kinetic energyPower from movement
- ionizationCharge acquisition process
- excitationStimulation of response
cathode
Electrode current exits through
- vacuum tubeEvacuated electronic amplifier
- photoelectronLight-expelled negative particle
- thermionicHeat-emitted electron phenomenon
energy distribution
Channeling resources across systems
- kinetic energyPower from movement
- ionizationCharge acquisition process
- excitationStimulation of response
aluminum oxide
Metal-oxygen ceramic compound
- thin filmNarrow surface coating
- electrical dischargespark, arc, corona, plasma, lightning
- photoelectricsphotoemission, photoelectron, photocell, photodetector, photodiode
- quantum phenomenaquantum leap, superposition, entanglement, tunneling, decoherence
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