Pulsed NMR Experiments by TeachSpin

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(Information on TeachSpin's CURRENT Pulsed/CW NMR)

Pulsed NMR PS1-B (Discontinued*)

introduction | the instrument | experiments | specifications| prices

*Although the original PS1 series PULSED NMR SPECTROMETER is no longer being built, we maintain these pages for the convenience of our users and continue to support the instruments. As far as we know, all of them are still in action, including the very first one, which was delivered to Carnegie-Mellon University in the spring of 1994.

Current Pulsed/CW NMR Designed for Teaching

The PS1-B is a 15MHz pulsed nuclear magnetic resonance spectrometer capable of observing proton NMR with excellent signal-to-noise ratios in aqueous solutions and organic liquids.

Using small samples (0.16mL) prepared by the student, the instrument can be used to:

Measure spin-lattice relaxation time using a p - p/2 pulse sequence.
Measure spin-spin relaxation time using any of the following pulse sequences:
- Spin-echo: p/2 - p pulses.
- Carr Purcell: p/2 - p - p - ... pulses.
Estimate diffusion using Meiboom-Gill sequence in a known field gradient.
Examine the effect of chemical changes on spin-lattice and spin-spin relaxation times by monitoring these relaxation times for samples of epoxy or concrete as a function of curing time.
Plot magnetic field contours in two dimensions.
Study precession in rotating reference frames, effective fields, off-resonance signals and free-induction decay.
Directly measure the rotating B field during the pulse.
Estimate signal strength.

Representative Data
	A spin-echo signal using the two pulse (p/2 - p sequence) from the 0.15 ml mineral oil standard sample supplied with each instrument.

A Meiboom-Gill (p/2 -90° phase shift - p - p - p ...) pulse stream, showing multiple echoes, using the same standard mineral oil sample.

Developed by faculty with more than 60 years of accumulated experience in research and teaching in the field of magnetic resonance.

It provides science students with a hands-on approach to learning the basic principles of pulsed nuclear magnetic resonance.
Its modular construction allows students to experiment with each part of the apparatus separately, to determine each module's function and to interconnect the modules.
The spectrometer is suitable for advanced laboratory experiments at the undergraduate and graduate level.
The PS1-B uses new high-energy magnetic material to create a high-field, high-homogeneity permanent magnet.
New solid-state technology gives it a rock-stable synthesized frequency source.
Its unique switching and power amplifier circuits create coherent and stable pulsed radio-frequency fields.

TeachSpin has built an affordable, yet versatile pulsed NMR spectrometer that universities and colleges can easily adapt to their science curriculum.