TEL 2522 Luminescent Tube

TEL 2522 LUMINESCENT TUBE

• establishment of the cathode ray gun (diode electron gun)
• excitation of luminescence by ultraviolet light.
• excitation without ionization, no charge emitted
• persistence and infrared quenching
• The metastable state of excitation
• Different colors, analysis spectroscope
• Introduction of concept of excitation potentials

The Luminescent Tube comprises a simple diode electron gun in a cylindrical neck and three mica flags coated with different phosphors mounted on a metal support and located in the center of an evacuated spherical glass bulb.

The diode gun, a tungsten wire “hairpin” filament and a cylindrical anode, projects a wide beam of cathode rays into the experimental zone. This beam is intercepted by the phosphor screens. All connections are made on the Universal Stand.

Power supply
Anode voltage, 2000-5000V, DC
Maximum filament voltage, 7.5V.
Anode current at 4000V, 150µA.

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TEL 2522

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