Cathode ray tube electrostatic and magnetic deflection

A weak magnet is used to deviate the cathode rays generated by a Cathode-ray Tube. The north pole is moved close to the tube along the horizontal plane and the rays go down, then the south pole is moved close to the tube along the horizontal plane and the rays go up.
After this an electric field is applied between the deflecting plates with the positive pole up (red wire) and the negative pole down (black wire). The potential difference is 120 V and the rays, which are composed of negatively charged electron, bend up toward the positively charged plate. This effect can be opposed or enhanced by a magnet. When the electric field is removed the rays become horizontal again.

Cathode-ray Tube is mod. DE453-3S Kathodenstrahlröhre mit Spalt from Fruhmann GmbH
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