Conclusion

After thoroughly examining the use of the EPR spectrometer, we have successfully been able to obtain the signal from a sample of DPPH and of synthetic ruby. Through extensive modifications and additions to our apparatus, we were able to gain valuable experience with the equipment. The purpose of this experiment was to demonstrate the fundamental principles of EPR spectroscopy. The spectrometer was constructed as shown in Figure 4 using well seasoned, but readily available components. Although the spectrometer was crude compared to commercially available spectrometers, once properly tuned it effectively produced EPR signals for the sample of DPPH and can now be used to study other aspects of EPR spectroscopy. Future experiments in EPR spectroscopy including modeling the hyperfine structure of synthetic ruby could be performed at a later time to gain more insight into the characteristics of the sample.