This 120-336 GHz instrument is coupled to a 12.5 tesla superconducting magnet with a homogeneity of 10-5 over a 10 mm sphere.
It consists of a multi-frequency quasi-optical millimeter-wave bridge coupled to solid state millimeter wave sources and employs fundamental Schottky-diode mixers as principal detectors.
The detection bandwidth is high and it is suitable for transient and pulsed EPR. The instrument is equipped with RF sources and amplifiers for Electron-Nuclear Double Resonance experiments to measure unresolved hyperfine interactions.
Normally the instrument is used without resonator, and allows rather large samples up to a volume of ~200 microliter. The instrument is equipped with a single axis rotator with an accuracy of the order of 0.5 degree. The maximum single crystal dimensions for the rotator are 2x2x2 mm.
In CW mode, field modulation is used. In pulsed mode, without resonator π/2 pulse lengths are of the order of 400 ns. With a Fabry-Perot resonator these pulse lengths are of the order of 100 ns.
Available frequencies are 120, 240 and 395 GHz. The sample temperature can be controlled over the range of 1.5K to 400K.
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Last modified on 22 August 2023