Microwave Electron Spin Resonance Apparatus

This Electron Paramagnetic Resonance (EPR) experiment system is designed to study the fundamental principles of electron spin resonance and microwave spectroscopy. It enables students to observe electron spin resonance phenomena, determine the Landé g-factor, investigate microwave transmission characteristics, and analyze standing wave patterns within a resonant cavity. The system provides a comprehensive platform for advanced experiments in modern physics and solid-state physics. Physics Lab Experiments from Atico Exports.

Experiments :

• Study and Observe the Electron Spin Resonance (ESR/EPR) Phenomenon.
• Measure the Landé g-Factor of a DPPH Sample.
• Learn the Operation and Application of Microwave Components in an EPR System.
• Study Standing Waves by Varying the Resonant Cavity Length and Determine the Waveguide Wavelength.
• Measure the Standing Wave Distribution in the Resonant Cavity and Determine the Waveguide Wavelength.

Short-Circuit Piston :

• Adjustment Range: 30 mm

Sample :

• DPPH powder in tube (Ø2 × 6 mm)

Microwave Frequency Meter :

• Measurement Range: 8.6–9.6 GHz

Waveguide Dimensions :

• Internal: 22.86 × 10.16 mm (WR90 / R100)

Input Voltage :

• Maximum ≥20 V
• Accuracy: ±1% ±1 digit

Input Current :

• 0–2.5 A
• Accuracy: ±1% ±1 digit

Stability :

• ≤1 × 10⁻³ + 5 mA

Magnetic Field Strength :

• 0–450 mT

Output Voltage :

• ≥6 V

Output Current :

• 0.2–0.7 A

Phase Adjustment Range :

• ≥180°

Scan Output :

• BNC connector
• Saw-tooth wave output: 1–10 V

Frequency Range :

• 8.6–9.6 GHz

Frequency Drift :

• ≤±5 × 10⁻⁴ / 15 min

Operating Voltage :

• 12 V DC

Output Power :

• 20 mW (equal amplitude mode)

Mode :

• Equal amplitude

Internal Modulation :

• Square-wave modulation

Repetition Frequency :

• 1000 Hz

Accuracy :

• ±15%

Skewness :

• <±20%

Waveguide Dimensions :

• Internal: 22.86 × 10.16 mm (WR90 / R100)