With the Complete Properties of Electrons Apparatus, study electrostatic deflection, focusing, and electron behavior in transverse and axial magnetic fields.
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This electron properties lab is based on a 75-mm flat screen CRT and is contained in a compact metal case with a removable lid. All the accessories are included to explore electrostatic deflection, focusing, and electron behavior in transverse and axial magnetic fields. Power supply and measurement circuitry is entirely enclosed for safety and reliability. Multi-turn potentiometers and three 3½" digital LED meter displays help students easily obtain precise results. A full operator manual is included with experiment descriptions and explains both background and procedures, including the determination of e/m using the focusing effect of an electron beam spiraling around an axial magnetic field. The CRT is a 14-pin tube, 240-mm long with a 75-mm diameter round screen. Tube operates on 900–1450 V and includes electrodes for electrostatic focusing. The power supply and control system provide the voltages to operate the tube and the focusing and acceleration potentials can be set and monitored separately. The magnetic field coils supplied include a pair of 530-turn coils of 30-mm mean diameter for the transverse field and a 1300-turn solenoid of 95-mm diameter for the axial field. Case size is 47 × 33 × 22 cm and power is 110 VAC.