Microwave Electron Spin Resonance Apparatus Complete Model for Advanced Physics Lab

The Microwave Electron Spin Resonance Apparatus Complete Model for Advanced Physics Lab is designed to study materials containing unpaired electrons through Electron Spin Resonance, also known as Electron Paramagnetic Resonance (EPR). The system demonstrates the resonance transition that occurs when electron magnetic moments interact with electromagnetic waves in the presence of a magnetic field. This apparatus provides a highly sensitive and non-destructive method for investigating the microscopic properties of paramagnetic materials. Students can explore the interaction between unpaired electrons and surrounding atomic structures while gaining practical experience with microwave technology and magnetic resonance techniques. The system is widely applicable in physics, chemistry, biology, materials science, and medical research education. It combines microwave engineering with material characterization, making it an excellent teaching and research instrument for advanced laboratory studies. Manufactured by Atico Export India.

Experiments:

Observation of Electron Spin Resonance Phenomenon:

• Study the basic principles of ESR/EPR
• Observe resonance transitions of electron spins in a magnetic field
• Understand interaction between electron magnetic moments and microwave radiation

Measurement of Lande g-Factor:

• Measure the Lande g-factor of a DPPH specimen
• Analyze magnetic properties of paramagnetic materials
• Understand the significance of g-factor in ESR studies

Microwave Device Operation:

• Learn operation of microwave components used in ESR systems
• Understand microwave signal generation and detection techniques
• Gain practical experience with microwave instrumentation

Resonant Cavity and Standing Wave Investigation:

• Study standing wave formation in a resonant cavity
• Observe effects of cavity length variation on resonance conditions
• Determine microwave frequency through cavity adjustments

Waveguide and Field Distribution Measurement:

• Measure standing wave field distribution within the resonant cavity
• Determine waveguide wavelength
• Analyze microwave propagation characteristics

Microwave System:

Short-Circuit Piston Adjustment Range:

• 30 mm

Specimen:

• DPPH Powder in Tube
• Size: Φ2 × 6 mm

Microwave Frequency Meter Range:

• 8.6 GHz – 9.6 GHz

Waveguide Dimensions:

• 22.86 mm × 10.16 mm

Electromagnet:

Maximum Input Voltage:

• ≥ 20 V

Voltage Accuracy:

• 1% ± 1 Digit

Input Current Range:

• 0 – 2.5 A

Current Accuracy:

• 1% ± 1 Digit

Stability:

• ≤ 1 × 10⁻³ + 5 mA

Magnetic Field Strength:

• 0 – 450 mT

Pole Spacing:

• Approximately 20 mm

Dimensions:

• 140 mm Diameter × 270 mm Height

Sweep Field:

Output Voltage:

• ≥ 6 V

Output Current Range:

• 0.2 – 0.7 A

Phase Adjustment Range:

• ≥ 180°

Scan Output:

• BNC Connector
• Saw-Tooth Wave Output: 1 – 10 V

Solid-State Microwave Signal Source:

Frequency Range:

• 8.6 – 9.6 GHz

Frequency Drift:

• ≤ ±5 × 10⁻⁴ / 15 min

Operating Voltage:

• 12 VDC

Output Power:

• 20 mW

Voltage Standing Wave Ratio:

• < 1.2

Waveguide Dimensions:

• 22.86 mm × 10.16 mm

Modulation Parameters:

Operation Mode:

• Equal Amplitude

Internal Modulation:

• Square-Wave

Repetition Frequency:

• 1000 Hz

Accuracy:

• ±15%

Skewness:

• < ±20%

Components Included:

Main Controller:

• Quantity: 1

Electromagnet:

• Quantity: 1

Support Base:

• Quantity: 3

Microwave System Assembly:

• Quantity: 1 Set

DPPH Sample:

• Quantity: 1

Connection Cables:

• Quantity: 7

Instruction Manual:

• Quantity: 1

• High Measurement Sensitivity
• Non-Destructive Testing Method
• Stable Microwave Performance
• Comprehensive Experimental Coverage
• Easy-to-Operate Configuration
• Reliable Experimental Results
• Integrated Microwave and Magnetic Systems
• Suitable for Advanced Academic Laboratories
• Simple and Compact Structure
• Stable and Reliable Performance
• Multiple Experimental Applications
• Microwave Technology Integration
• High Sensitivity Measurement
• Non-Destructive Analysis Method
• Comprehensive Instruction Manual
• Ideal for Advanced Physics Laboratories