3B Scientific™ Fine Beam Tube T

Description

Complete experimental system is used to determine electron's specific charge and investigate deflection of electron beams in uniform magnetic field.

• Inside fine beam tube, sharply delimited electron beam is generated by system comprising indirectly heated oxide cathode, perforated anode and Wehnelt cylinder
• Impact ionization of helium atoms creates very bright, also sharply delimited trace of electron path in tube
• If tube is aligned optimally and an appropriate current flows through Helmholtz coils, electrons are deflected into circular orbit
• Diameter, anode voltage and magnetic field are parameters used to determine electron's specific charge
• Magnetic field can be calculated from coil current, geometry of Helmholtz coil pair being known

Experiment Topics:

• Electron deflection in uniform magnetic field
• Closed orbit or spiral path
• Determining an electron's specific charge e/m
• Tube's rotary angle: -10°, +270°
• Supply voltage: 100 to 240V 50/60Hz
• Power supply cable: EU, UK and US
• Dimensions: ∽31 x 27.5 x 41cm³
• Weight: ∽7.5kg

Fine-beam tube:

• Gas filling: Helium
• Gas pressure: 0.13hP
• Bulb diameter: 16.5cm
• Orbit diameter: 20 to 120cm
• Measurement mark
• Spacing: 20cm

Specifications

• Product Type: Fine Beam Tube T