Low Temperature Ferromagnetic Resonance Spectrometer System - pictures

Dr. Michael Wittenauer poses while setting parameters on the Hewlett Packard 8341B Synthesized Sweeper. This microwave source supplies microwaves directly to the FMR system for low frequency experiments. For mm-wave work, the Sweeper output is fed through an amplifier and one of several HP source modules that use non-linear components to generate mm-wave frequencies. The scalar analyzer is above the Sweeper and the large electromagnet, used to magnetize the sample, is in the background.

Mike is shown preparing the system for an experiment. The inverted cryostat has been removed from the support table and is shown with the vacuum jacket and radiation shield removed. The gold plated cold finger is made from oxygen free high purity copper. The support structure includes a set of rails that allow the cryostat, when installed within the magnet, to slide horizontally and clear of the magnet. This facilitates sample change.

The open inverted cryostat can be seen above the magnet just before insertion for a room temperature system test. Some of the equipment used with this experiment can also be seen.

This thing is heavy!