China Wholesale PN Junction Factory – LEEM-5 Apparatus of Work Function & Specific Charge of Electron – Labor
China Wholesale PN Junction Factory – LEEM-5 Apparatus of Work Function & Specific Charge of Electron – Labor Detail:
Description
Thermionic emission, one of its founders was Owen W. Richardson (1879~1959), a famous physicist in England, who discovered the thermionic emission law, namely Richardson law, pointing out the way for designing reasonable electron emission mechanism. His study had a profound impact on development of radio electronics, and won the 1928 Nobel Prize in Physics as a result.
Functions
1. Understand the concept of thermionic electron emission and verify the Schottky effect
2. Understand the concept of work function of a metal
3. Learn how to measure metal work function based on Richardson straight-line method
4. Understand magnetron principle and determine charge-mass ratio (e/m) by magnetron
Specifications
Description | Specifications |
Ideal diode | pure Tungsten filament |
filament current: 0.400 ~ 0.800 A; accuracy: 1.0 mA | |
anode voltage: DC 0 ~120 V; accuracy: 0.1 V | |
Parameters of coil | inner radius: r1=24.0 mm |
outer radius: r2=36.0 mm | |
length: L=18.0 mm | |
number of turns: N=800 | |
Magnetization current | 0 ~ 0.800 A |
Parts List
Item | Qty |
Main unit | 1 |
Ideal diode | 1 |
Housing | 1 |
Magnetization coil | 1 |
Wires | 8 |
Manual | 1 |
Product detail pictures:

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