CONSTRUCTION OF A PROTOTYPE LABORATORY-BUILT DESKTOP NMR SPECTROMETER

A hardware system for a laboratory-built desktop nuclear magnetic resonance (NMR) spectrometer was constructed with a module design based on single-phase detection architecture. This spectrometer features an operating frequency of DC to 100 MHz, RF pulse power of 0.7244 mW to 1.2589 W, minimum detec...

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Bibliographic Details
Published in:Instrumentation science & technology Vol. 39; no. 1; pp. 47 - 62
Main Authors: Xiaonan, Li, Xiao, Yin, Ming, Wang, Tao, Song, Wenhui, Yang
Format: Journal Article
Language:English
Published: Taylor & Francis Group 31.01.2011
Subjects:
FPGA programming
NMR spectrometer
RF signal process
single-phase detection
ISSN:1073-9149, 1525-6030
Online Access:Get full text
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Summary:A hardware system for a laboratory-built desktop nuclear magnetic resonance (NMR) spectrometer was constructed with a module design based on single-phase detection architecture. This spectrometer features an operating frequency of DC to 100 MHz, RF pulse power of 0.7244 mW to 1.2589 W, minimum detectable signal of 1.5136 × 10 −10  mW, and receiver bandwidth of 20 kHz. Verification of the functional feasibility of NMR detection was implemented using a 30-mL custom probe in a 0.23-T magnetic field. A baseband free induction decay was also acquired through the application of an RF pulse at 1 W for 10 μs. The observed initial amplitude and frequency of the MR signal are 1.47 V and 1.25 kHz, respectively. Meanwhile, the effective transverse relaxation time ( ) for this configuration declines to no more than 15 ms because no shimming treatments were taken. The proposed desktop NMR spectrometer is suitable for building a hand-made NMR spectrometer in the laboratory, and enhances opportunities for novel and exciting NMR experiments.
ISSN:1073-9149
1525-6030
DOI:10.1080/10739149.2010.537717