Thomson Tube S

High-vacuum electron tube with high-accuracy electron gun and ruled target phosphorescent screen. Determine the fundamental electron charge-to-mass ratio (e/m), study mean electron velocities using field cancellation, and explore electron optics using this tube. The electron beam trajectory can be manipulated using two methods: 1) deflection induced by the electric field of the built-in plate capacitor, or 2) magnetically using external Helmholtz Coils S (see Recommended).

• Max. filament voltage: 6,3 V AC
• Max. anode voltage: 5 kV
• Max. capacitor voltage: 500 V
• Anode current: approx. 0.1 mA at 4 kV (anode)
• Glass bulb: approx. 130 mm dia.
• Total length: approx. 250 mm

Additionally required:

• 5401.U185001 Tube Holder S
• 5401.U138021 Set of 15 Safety Experiment Leads, 75 cm
• 5401.U185051 Helmholtz Pair of Coils S
• 5401.U33010230 High Voltage Power Supply, 5 kV (230 V, 50 / 60 Hz)
• 5401.U33000230 Power Supply, 500 V DC (230 V, 50 / 60 Hz)