2534 Fine Beam Tube (Gas-Filled)
- narrow visible electron beams
- velocity focusing and gas multiplication
- mean free path studies and unstable beams
- primary and higher orders of ionization
- loss of energy in a spiral path
- measurement of “assumed circular path” e/m
- secondary emission and phosphor screen “blanking”
- introduction to plasma technology
The electrons emitted by the indirectly heated oxide coated cathodes are projected from the two identical guns in the form of a narrow pencil beam. These beams can be accurately traced within the helium gas as a green glow due to the emission of energy during the collision processes experienced by the electrons. The angle of projection from the guns can be modified by applying a potential across miniature deflecting plates located just beyond the emission apertures. Two coaxial parallel rings are etched into the glass envelope at a spacing of 80mm to help measure the beam diameter. All connections are made on the Universal Stand.
Power supply
Anode Voltage, 0-300 V DC
Anode Current, 10-20mA.
Heater Voltage, 6.3 V, 0.3 A.
Deflector Voltage, 0-60 V DC
Recommended Accessories
TEL U33000 Power Supply
TEL 2502 Helmholtz Coils
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