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Earth's Field Nuclear Magnetic Resonance (NMR) Gradient/Field Coil System

Newsletter 1 – Transforming Earth's Field NMR
Newsletter 2 – Putting the 'R' Into the Earth's Field NMR
Learn about Earth's Field NMR
Aliasing on the Digital Oscilloscope


Gradient/Field Coil System Brochure
Earth's Field NMR Brochure

Introduction




Gradient Coils:

  • Homogenize Local Earth's Magnetic Field
  • Permit Measurement of Spin-Spin Relaxation (T2)
  • Demonstrate One-Dimensional NMR Imaging (MRI)
  • Generate Observable (and Audible) Spin-Echoes
Helmholtz Coils:
  • Permit Absolute Measurement of Nuclear Magnetic Moments
  • Provide Fields for Experiments on 31P and 2H Nuclei
  • Show Quantitatively that Magnetic Fields Add as Vectors
The Earth’s Field Gradient/Field Coil System (EFGFC1-A) is a valuable addition to the Earth’s Field Nuclear Magnetic Resonance (EFNMR1-A) apparatus. Although the EFNMR1-A offers a long list of experiments that can be performed in liquids that contain either hydrogen or fluorine, these Gradient/Field Coils, with their controller, make possible even more experiments, with more nuclei. And, of course, the Gradient Coils can be used to make the local earth's magnetic field in the teaching laboratory significantly more homogenous over the sample. This, in turn, allows the nuclei in all parts of the sample to precess at the same rate, producing a free-induction decay (FID) limited by the intrinsic sin-spin interaction T2, rather than by the magnetic field inhomogeneity. As a result, locations in which signals were once too small to use now become viable experimental locations.

The Gradient/Field Coil System was initially developed by Professor David Van Baak of Calvin College to be used with his TeachSpin EFNMR1-A. Once we saw it in action, we knew we had to make it universally available. Collaborating with Dr. Van Baak, we have created a robust apparatus that can be used on many levels. Dr. Van Baak has written the detailed instruction manual for both the instructor and the students. We believe that the Earth's Field NMR, with this coil system, is without doubt, the best instrument for students beginning their study of magnetic resonance. It has no equal!

GRADIENT COILS:
  • HOMOGENIZE LOCAL EARTH'S MAGNETIC FIELD
  • PERMIT MEASUREMENT OF SPIN-SPIN RELAXATION (T2)
  • DEMONSTRATE ONE-DIMENSIONAL NMR IMAGING (MRI)
  • GENERATE OBSERVABLE (AND AUDIBLE) SPIN-ECHOES
HELMHOLTZ COILS:
  • PERMIT ABSOLUTE MEASUREMENTS OF NUCLEAR MAGNETIC MOMEMENTS
  • PROVIDE FIELDS FOR EXPERIMENTS ON 31P, 2H NUCLEI
  • SHOW QUANTITATIVELY THAT MAGNETIC FIELDS ADD AS VECTORS
Learn about Earth's Field NMR.