Single-sensor characterization instrument

The Metal Electron Work Function Tester measures thermal electron emission from a heated metal cathode and determines the metal's electron work function using the Richardson linear method. It is designed for studying thermionic emission characteristics of cathode materials and the physical properties of their surfaces.

Instrument Composition:
The instrument consists of an experimental instrument and a metal diode mounted on top.

Features:

• Integrated design eliminates the need for complex wiring.
• The diode is protected by a transparent housing and is resistant to damage.

Experimental Details:
Measuring the electronic work function of metal tungsten using an ideal diode.

Objectives:

• Understand the basic principles of thermionic emission and master a method for measuring the work function.
• Determine the electronic work function of metal tungsten using the Richardson linear method.
• Learn data processing techniques.

Specifications / technical data (see below):
Detailed instrument and diode specifications and the relationship between filament current and filament temperature are provided in the technical specifications section below.

Technical specifications:

• Standard (Ideal) Diode Specifications
• Filament material: Pure Tungsten
• Filament current (operating range noted): nominal 0.5–0.82 A (recommended testing range: 0.56–0.76 A)
• Filament diameter: 7.5 × 10^-5 m
• Anode material: Nickel
• Anode length: 0.015 m
• Anode inner diameter: (9.0–9.2) × 10^-3 m
• Relationship between filament current and filament temperature (pairs I (A) → T (10^3 K)):
• 0.52 A → 1.93 × 10^3 K
• 0.56 A → 2.00 × 10^3 K
• 0.60 A → 2.07 × 10^3 K
• 0.64 A → 2.14 × 10^3 K
• 0.68 A → 2.21 × 10^3 K
• 0.72 A → 2.28 × 10^3 K
• 0.76 A → 2.35 × 10^3 K
• 0.80 A → 2.42 × 10^3 K
• Filament current and anode voltage are adjustable based on diode specifications.