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P3.8.5.2 Assembling a Velocity Filter (Wien Filter) to Determine the Specific Electron Charge
P3.8.5.2 Assembling a Velocity Filter (Wien Filter) to Determine the Specific Electron Charge
Leybold LD Didactic

P3.8.5.2 Assembling a Velocity Filter (Wien Filter) to Determine the Specific Electron Charge

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Assembling a Velocity Filter (Wien Filter) to Determine the Specific Electron Charge

In the experiment P3.8.5.2, a velocity filter (Wien filter) is constructed using crossed electrical and magnetic fields. Among other things, this configuration permits a more precise determination of the specific electron charge. At a fixed anode voltage UA, the current I of the Helmholtz coils and the deflection voltage UP are set so that the effects of the electric field and the magnetic field just compensate each other. The path of the beam is then virtually linear, and we can say:
COMPONENTS OF EQUIPMENT SETS:

1 555 624 Electron deflection tube
1 555 600 Tube stand
1 555 604 Pair of Helmholtz coils
2 521 70 High-voltage power supply, 10 kV
1 521 546 DC Power Supply 0 ... 16 V, 0 ... 5 A
2 500 611 Safety connecting lead, 25 cm, red
1 500 621 Safety connecting lead, 50 cm, red
1 500 622 Safety connecting lead, 50 cm, blue
2 500 641 Safety connecting lead, 100 cm, red
4 500 642 Safety connecting lead, 100 cm, blue
2 500 644 Safety connecting lead, 100 cm, black


EXPERIMENT INSTRUCTIONS PLEASE CLICK HERE