(Information on TeachSpin's CURRENT Pulsed/CW NMR)
TEACHSPIN'S ORIGINAL PULSED NMR SPECTROMETER
*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.
Link to Original Pulsed NMR (PS1)
will take you to the original pages!
Conceptual Introduction – Original Pulsed Nuclear Magnetic Resonance
Advanced Lab - University of Michigan - An interesting link to student instructions for the PS1.
TEACHSPIN'S PULSED NMR SPECTROMETER
PS2-A with Continuous Wave capability sets the standard in Pulsed NMR systems designed for teaching.
In response to requests received over the twelve year life of our original Pulsed NMR, PS1-A and B*, this design has a host of new and exciting features. First of all, one can study NMR in both hydrogen and fluorine nuclei. The new magnet has a higher field (.49 Tesla and 21 MHz for protons) and a set of electrically controlled gradient coils. The magnetic field is stabilized to at least ±002 gauss over twenty minutes. The electrical shim coil homogenizes the magnetic field so that T2* for a mineral oil sample is 10 milliseconds. The combination of a stabilized and homogonized magnetic field makes it possible to detect inequivalent fluorine nuclei in the FID signal.
This spectrometer has phase sensitive detection (with a built in phase shifter) as well as linear amplitude detection. It allows both in-phase and quadrature detection of both pulsed and CW signals. That's right, this unit has a built-in slow magnetic field sweep and lock-in detector for doing CW resonance. This allows the students to compare CW absorption and dispersion with the FFT of the free-induction decay signals. This can be done for both hydrogen and fluorine.
The same pulse sequences are available, that is CP and GM sequences, for measuring T1 and T2, in liquids, soft solids, and some hard solids. This unit has a recovery time five times shorter than PS1-A, B, namely ten microseconds. That means students can study many solids whoes T2 is about five microseconds or longer.
For those of you who have used the original unit for many years, we believe you will be delighted with the new instrument capabilities. Your students will be even more excited. Check out the details on the Pulsed/CW NMR pages of this website.
Jonathan F. Reichert
President TeachSpin Inc.
* We discontinued our original Pulsed NMR Spectrometer PS1-B because some key electronic components are no longer being manufactured. (Have no fear we have plenty in stock for repair work.)