A low-cost upgrade of a commercial magnetic resonance spectrometer to a broad-band system for NMR and ESR

Due to their longevity and availability pulsed magnetic resonance spectrometers of the types Bruker CXP and Bruker MSL are widely used in research institutions. This contribution gives a detailed description of how to extend these spectrometers to broad-band systems for NMR and ESR measurements. As it is based on off-the-shelf components, the approach reported here is both cost and time effective. Experimental results for a magnetically ordered intermetallic compound and a one-dimensional organic conductor demonstrate the performance of the system. Particular attention is paid to the calibration procedure.