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...Electron diffraction tube quick reference guide introduction the consists of an gun that accelerates electrons towards a graphite foil in contrast to cathode ray and fine beam much higher voltage is used why wave behaviour particles outcrop are diffracted at inner structure functional principle source which produces stream through thermionic emission heated focuses it into thin by control grid or wehnelt cylinder strong electric field kv between anode before they leave spaces afterwards accelerated hit there so fly screen different directions when strike fluorescent light emitted picture gets visible whole configuration placed vacuum avoid collisions gas molecules air would attenuate flourescent u cern teachers lab safety precautions don t touch cables during operation high voltages this experiment do not exert mechanical force on danger implosions bright spot just center can damage layer reduce intensity after each reading as soon possible experimental procedure set g v using second k...