A Wideband spectrometer for NMR studies

A Wideband Spectrometer with RFI Detection

We report on the design and construction of a wideband spectrometer of 500 MHz instantaneous bandwidth that includes automatic radio frequency interference (RFI) detection. The implementation is based on hardware developed at the Center for Astronomical Signal Processing and Electronics Research (CASPER). The unique aspect of the spectrometer is that it accumulates both power and power-squared,...

A 140 GHz pulsed EPR/212 MHz NMR spectrometer for DNP studies.

We described a versatile spectrometer designed for the study of dynamic nuclear polarization (DNP) at low temperatures and high fields. The instrument functions both as an NMR spectrometer operating at 212 MHz ((1)H frequency) with DNP capabilities, and as a pulsed-EPR operating at 140 GHz. A coiled TE(011) resonator acts as both an NMR coil and microwave resonator, and a double balanced ((1)H,...

Implementing ultrafast 2D NMR experiments on a Bruker Avance Spectrometer

A microcomputer ( ffiM PC ) based pulsed NMR spectrometer

This paper describes the design and construction of a personal computer (PC) based pulsed NMR spectrometer to measure spin-lattice relaxation times in solids. The spectrometer works at 10 MHz and produces d. pulses of amplitude 200 Vp_p' The pulse programmer provides various pulse sequences such as 180°-1"-90°and 90°-1"-180°and inter pulse intervals (1")can be computer programmed. The rise and ...

An optical NMR spectrometer for Larmor-beat detection and high-resolution POWER NMR.

Optical nuclear magnetic resonance (ONMR) is a powerful probe of electronic properties in III-V semiconductors. Larmor-beat detection (LBD) is a sensitivity optimized, time-domain NMR version of optical detection based on the Hanle effect. Combining LBD ONMR with the line-narrowing method of POWER (perturbations observed with enhanced resolution) NMR further enables atomically detailed views of...