NMR signal observed on oscilloscope (H-nuclei)
Lissajous figure
Block diagram of controller Circuit
Note: oscilloscope not included
Features
11 easy-to-use specimens in micropipette tubes
Highly homogeneous magnetic field to assure more coda waves
Open magnet structure for easy specimen access
High SNR & stable frequency
One specimen contains both H & F nuclei for determining the g-factor of F-nuclei
High accuracy milli-teslameter and frequency meter included
Introduction
The LEAI-11A Experimental System of Continuous-Wave Nuclear Magnetic Resonance (CW-NMR) is a high-precision instrument designed for advanced studies in nuclear magnetic resonance. This system includes a high homogeneity magnet and a controller unit that work together to provide a controlled environment for high-quality NMR experiments. The marginal oscillator is separated from the electric unit and is mounted on a scaled rail, allowing precise adjustment and positioning within the magnetic field, ensuring accurate measurements.
This advanced system is ideal for physics laboratories and research institutions that require precise and reproducible results for complex NMR experiments.
The instruction manual provides detailed explanations, including experimental setups, theoretical principles, and step-by-step instructions, making it easy for students to use and understand the apparatus. Please click Experiment Theory and Contents to find more information about this apparatus.
Experiments Available with LEAI-11A:
1. Observation of NMR Phenomena in H- and F-Nuclei:
Students will observe the NMR phenomenon in Hydrogen (H-nuclei) and Fluorine (F-nuclei), analyzing the interaction between the nuclei and the magnetic field to understand key NMR principles.
2. Determination of Parameters: Gyromagnetic Ratio, g-Factor, and Nuclear Magnetic Moment:
Students will learn to measure and determine important NMR parameters, such as the gyromagnetic ratio, g-factor, and nuclear magnetic moment for different nuclei. These parameters are crucial in understanding nuclear behavior in magnetic fields.
3. Observation of the Influence of Magnetic Field Homogeneity on Signal Coda Wave Using Different Specimens:
This experiment focuses on the magnetic field homogeneity and its effect on the NMR signal's coda wave when using different specimens. Students will understand how variations in magnetic field uniformity can impact the quality and precision of NMR signals.
4. Measurement of Magnetic Field and Calibration of Teslameter Using the NMR Method:
Students will measure the magnetic field strength using the NMR method and learn how to calibrate the Teslameter, a device used to measure magnetic field strength. This experiment helps students understand the practical aspects of field calibration and the importance of accurate measurements in NMR studies.
Specifications
| Description | Specifications |
| Types of nuclei | H and F |
| SNR | > 40 dB (H nucleus) |
| Oscillator frequency | 17 MHz to 23 MHz, continuously adjustable |
| Magnet pole | diameter: 100 mm; spacing: 20 mm |
| Power source of sweep field | 0 ~ 5 V, 50/60 Hz |
| NMR signal amplitude (peak to peak) | > 4 V (H-nuclei); > 100 mV (F-nuclei) |
| Homogeneity of magnetic field | better than 8 ppm |
| Probe moving range | 5 ~ 15 cm |
| Phase shifter | 50 Hz sine wave, > 90° |
| Number of coda waves | > 10 (H nucleus) |
| Teslameter | measurement range 0 ~ 2000.0 mT, resolution 0.1 mT |
Parts List
| Description | Qty |
| Main Electric Unit | 1 |
| Electromagnet with Rail & Marginal Oscillator | 1 |
| Power Cord | 1 |
| BNC Cable | 3 |
| Connection Wires | 2 |
| Tesla Probe | 1 |
Specimens in Micropipette Tubes | 11 (CuSO4 Solution, CuSO4(1%, 2%, 3%, 4% & 5%), Fe2Cl3 Solution, HF Acid, Glycerol, Pure Water, Polytetrafluoroethylene) |
| Frequency Meter | 1 |
| Instructional Manual | 1 |
NMR signal observed on oscilloscope (H-nuclei)
Lissajous figure
Block diagram of controller Circuit
