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''Wonderstone'' ENDOR cavity.

¹Department of Physical Chemistry, Univeristy of Nijmegen, Toernooiveld, Nijmegen, The Netherlands.

The Review of Scientific Instruments

|July 1, 1978

Summary

This summary is machine-generated.

Researchers developed a novel Electron Nuclear Double Resonance (ENDOR) cavity using Wonderstone, a natural rock. This unique design facilitates experiments requiring low temperatures and precise measurements.

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Area of Science:

Physics
Materials Science
Spectroscopy

Background:

Electron Nuclear Double Resonance (ENDOR) spectroscopy is a powerful technique for studying paramagnetic species.
Traditional ENDOR cavities often face limitations in thermal stability and ease of sample manipulation, especially at low temperatures.
Developing novel cavity materials and designs is crucial for advancing ENDOR applications.

Purpose of the Study:

To design and construct a high-quality ENDOR cavity utilizing Wonderstone, a naturally occurring rock.
To evaluate the suitability of Wonderstone as a substrate material for microwave cavities.
To detail the methods for achieving a conductive silver coating on the interior surface of the Wonderstone cavity.

Main Methods:

A cylindrical cavity was designed and constructed using Wonderstone, operated in the TE(011) mode.
Four vertical posts were integrated to form the ENDOR coil within the cavity.
External coils were used for 100 kHz field modulation, and the cavity was designed for easy insertion of a cold-finger Dewar.

Main Results:

A functional and high-quality ENDOR cavity was successfully constructed from Wonderstone.
The Wonderstone cavity demonstrated suitability for low-temperature applications with a cold-finger Dewar.
The study discusses the advantages of Wonderstone and the process of applying a silver conducting layer.

Conclusions:

Wonderstone is a viable and advantageous material for constructing high-quality ENDOR cavities.
The developed cavity design is well-suited for low-temperature Electron Nuclear Double Resonance spectroscopy.
This work offers a new material solution for microwave cavity fabrication in spectroscopic applications.