Macor ceramic machining for Dynamic Nuclear Polarization optics

DNP requires the marriage of high magnetic fields and intense mm-wave radiation.  Metal mirrors can distort the
very homogenous fields required, so thin metal film coated dielectric mirrors can bring significant performance advantages:

As part of building a quasi-optical probe delivering microwave power for a sample buried deep in a highly homogenous
superconducting magnet, we have been making full use of our precision Bostomatic high-speed milling machine:

The recently arrived Swiss-made Lehmann AG two-axis table and 5-Axis Heidenhein TNC640 controller has allowed
us to machine the Macor glass cerami with a precision elliposodal form.

A short video can be seen below

and here is the result... ahead of mirror surface metalisation