BEX-8509 metal electron work-function experiment apparatus
This experiment measures tungsten's electron work function, using a tungsten filament as an ideal diode cathode and a coaxial cylindrical anode. The emitting cathode surface is limited to a uniformly heated length while approximating infinitely long electrodes without edge effects. Measuring metal electron work function combines basic methods including Richardson straight-line measurement, extension measurement (source wording), and compensation measurement, with useful training in data processing. It is therefore a meaningful experiment. A PASCO data interface supports live acquisition and analysis for intuitive, accurate, efficient operation.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Metal electron-work-function experimental apparatus - Anode-voltage module | Adjustable 0-160VDC |
| Metal electron-work-function experimental apparatus - Anode-current module | Measurement range 0-20mA |
| Metal electron-work-function experimental apparatus - Filament-current module | 0-800mAAdjustable |
| Ideal vacuum-diode box - Filament material | Pure tungsten |
| Ideal vacuum-diode box - Anode material | Nickel |
| Ideal vacuum-diode box - Filament current | 0.50-0.80A |
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