Critical Potential Tube S with He-Filling
For quantitative investigations of inelastic collisions of electrons with inert gas atoms, determination of ionisation energy and excitation energies of helium, resolution of the energy states of various primary and orbital angular-momentum quantum numbers, as well as demonstrating meta-stable states. Includes shielding as well as a discharge tube and battery unit (battery included in the scope of delivery) for the collector voltage.

Cathode heating voltage: Uh < 3 V, Ih < 1.3 A

Anode voltage: Ua < 60 V

Anode current: Ia < 10 mA

Collector voltage: Uc =1.5 V

Collector current: Ic < 200 pA