Sensitive pulsed EPR spectrometer with an 8–18 GHz frequency range

Abstract
The design and construction details of a kW power level pulsed EPR spectrometer with an 8–18 GHz frequency range are presented. The spectrometer is designed for high sensitivity over this wide frequency range. A synthesized sweeper is used as the microwave source. Details of the pulse electronics, pulse timings, cryogenics, and the Macintosh computer interface are described. Representative three pulse electron spin echo envelope modulation patterns of a Cu (II) tetraimidazole complex at X‐ and P‐band frequencies are presented.