Thomson e / m tube

Supplier: 3B Scientific
765-0090EA 2360 EUR
765-0090
Thomson e / m tube
Educational Materials Physics Educational Materials Heat/Thermodynamics Learning Activities
Evacuated glass flask containing i.a. electron gun with directly heated tungsten wire cathode and a cylindrical, collimating anode. The generated beam is allowed to stroke along a semi-transparent mica disc in the center of the tube. Luminescent coating on the front of the disc makes the beam appear. Two of the edges of the back are provided with graduated scales.

  • Cut to any length "

The tube can be used for electrostatic and magnetic deflection of the electron beam (the latter with the help of Helmholtz coils), determination of e / m with combined electric and magnetic fields or with only magnetic deflection, which gives a more accurate value. Furthermore for demonstration of the electrons' speed distribution, reflection, spiralization and focusing as well as beam divergence with magnetic alternating field.

Maximum glow voltage: 7.5 V
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