Lab Equipment for Teaching Physics

Note: oscilloscope not included

Features

• Simple structure

• Ample experimental examples

• Stable performance

  
  

Introduction

Electron Spin Resonance (ESR), also known as Electron Paramagnetic Resonance (EPR), is a technique used to study materials that contain unpaired electrons. The principle behind ESR is based on the resonance transition that occurs when the magnetic moment of an electron spin interacts with an electromagnetic wave at a specific frequency in the presence of a magnetic field. This interaction leads to a resonance phenomenon that can be detected and analyzed.

The LEAI-15 Microwave Electron Spin Resonance Apparatus is specifically designed to help students understand and explore electron spin resonance in the microwave frequency range. It provides a non-destructive and highly sensitive method for studying the microstructure of substances by investigating the behavior of unpaired electrons in the material. The apparatus is a powerful tool for revealing how these electrons interact with surrounding atoms, which is particularly useful in a variety of scientific fields such as physics, chemistry, biology, and medicine.

This system is ideal for advanced physics courses at universities and colleges, where students can gain hands-on experience with the principles and applications of ESR. It combines the study of microwave technology with material analysis, making it an invaluable tool for understanding the properties of paramagnetic substances.

The instruction manual provides detailed explanations of the experimental configurations, the theoretical foundations, and step-by-step procedures for using the apparatus effectively. Please click Experiment Theory and Contents to find more information about this apparatus.

Using this apparatus, the following experiments can be conducted:

1. Study and Acknowledge Electron Spin Resonance Phenomenon:

   The primary experiment involves studying the electron spin resonance phenomenon, where students learn how an electron's spin interacts with external magnetic fields and electromagnetic waves. This provides insight into the fundamentals of **ESR** and its significance in materials science.

2. Measure Lande's g-Factor of DPPH Specimen:

   The g-factor is a crucial parameter in ESR experiments that reflects the relationship between the electron's magnetic moment and its angular momentum. Using a DPPH (Diphenylpicrylhydrazyl) specimen, students will learn to measure this factor and understand its role in characterizing paramagnetic substances.

3. Learn to Use Microwave Devices in EPR System:

   This experiment will teach students how to operate microwave devices within the ESR system. Understanding the role of microwave frequencies in the excitation of electron spins is essential for conducting ESR experiments.

4. Understand Standing Wave by Changing Resonant Cavity Length:

   Students will learn about standing waves in a resonant cavity by adjusting its length. This experiment will also demonstrate how changing the cavity length affects the resonance conditions and how it can be used to determine the microwave frequency.

5. Measure Standing Wave Field Distribution in Resonant Cavity and Determine Waveguide Wavelength:

   Students will investigate the standing wave field distribution within a resonant cavity and learn to measure and analyze the waveguide wavelength. This is a critical experiment for understanding the relationship between microwave fields and resonance conditions in ESR experiments.

Specifications

Parts List