YMP-6108 # Metal Electric Work Function Experiment

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产品详情

SUMMARY

YMP-6108 is used for university experimental teaching of the metal electron work function. The device uses coaxial tungsten filaments andmetal rings as the cathode and anode materials. Two insulative shielded electrodes with the same voltage as the anode are added at bothends of the anode to prevent fringe effects, e.g., cold end effect and uneven electric field. When the hot electrons within the heated filament acquire energy greater than the work function, the electrons escape and form an emission current. Using the Fermi-Dirac quantumstatistical distribution law of electron energy in metal, the hot electron emission formula can be calculated, and the work function can beobtained.

PURPOSE

1. ‍Understand Fermi-Dirac quantum statistical law.‍

2. Understand the law of hot electron emission and master the measurement method of electron work function.‍

3. ‍Analysis of electronic work from cathode materials by Richardson linear method.‍

FEATURES

Ideal vacuum diodes are transparent andintuitive
The ideal vacuum diode is inserted on the independenttube seat, and is equipped with a transparent acrylic protectivecover, which can not only intuitively observe the working state of the vacuumdiode, but also effectivelyprotect the glass device.The independent tubebase is engraved with a clear experimental schematic diagram, which can enablestudents to better understand the entire experimental principle.
Accurate and stable anode currrent
The anode current measurement module uses a micro-ampcurrent amplifier and a four and a half digital display meter, witha measurement range of up to 0.1uA~20mA, which can measure weak anodecurrent accurately, finely and stably.
Anode voltage output is efficient and accurate
The anode voltage output uses a linear power supply,and the output amplitude reaches 0~160.0V, which can provide the anode voltageof the vacuum diode stably and efficiently.
Expand the experimental contents
By adding a power supply and a solenoid coil, the experimental contents can be added: tElectron movement in radial electric field and axial magnetic field，Research on Fermi-Dirac distribution，The volt-ampere characteristics of an ideal vacuum diode.
Expandable to digital experiment
Digital experiment: the instrument can be equipped with 2-channel data acquisition interface and voltage sensor, which can be upgraded to a computer-based digital data acquisition and analysis experiment system.