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NMR Concepts & Operating Techniques 04

Phase and the NMR Signal

   Watch Promo

Block diagrams of NMR spectrometers and signal detection are covered. The phenomenon of ringing is used to explain why the FT of a rapidly decaying signal produces a broad line in a spectrum. A transmitter coil is used to generate an RF pulse, and the shape of the spectral lines are shown to be dependent upon the phase of the pulse. How the rotation of magnetization vectors is also dependent upon the phase of the RF pulse is investigated. The principles of quadrature phase detection (QPD) are described in detail.

  • Signal Detection
  • Resonance Offset, and Rotating Frame
  • Generation of B1
  • Problem: Calculate Strength of B1
  • Phase of Transmitter RF Pulse (B1)
  • Effect of Phase of Transmitter RF Pulse (B1)
  • FID Signal Phase and Spectral Line-Shapes
  • Principles of Quadrature Phase Detection


Your Instructor


Daniel D. Traficante
Daniel D. Traficante

Dr. Traficante obtained his Ph.D. in 1962 from MIT in the field of synthetic organic chemistry. He has worked in the NMR field since 1962, and in the early 1970s he pioneered multi-nuclear instrumentation. He has built probes, reassembled spectrometers, and developed new software programs to enhance the signal-to-noise ratio and the resolution of NMR spectra. His current research in the areas of structure determination, instrumentation, and data processing provide him with knowledge and expertise that are applicable to a broad audience. His organic chemistry background, plus his expertise in electronics, gives his lectures a special depth and appreciation for the field. Dr. Traficante is known throughout the world as an outstanding educator.


Class Curriculum


  Basic Concepts In NMR
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