Experimental System of Pulsed NMR for Advanced Physics Lab

The Experimental System of Pulsed NMR for Advanced Physics Lab is a modern teaching and research instrument designed to investigate nuclear magnetic resonance phenomena using pulsed radio-frequency excitation techniques. Unlike Continuous-Wave NMR systems, PNMR applies short RF pulses to the nuclear spin system and observes the resulting time-domain responses. The system utilizes Fast Fourier Transform (FFT) technology to convert time-domain signals into frequency-domain spectra, effectively providing the capabilities of multiple continuous-wave NMR spectrometers simultaneously. This approach enables observation of resonance phenomena over a wider frequency range while producing significantly stronger signals. The apparatus incorporates advanced DDS (Direct Digital Synthesis) technology for pulse generation and PID temperature control technology to ensure exceptional stability and repeatability. The complete system consists of a Constant Temperature Unit, RF Transmitting Unit, Signal Receiving Unit, and computer-based software for experiment control and data analysis. Physics Lab Experiments from Atico Exports.

Experiments:

Study of Pulsed NMR Principles:

• Understand the fundamental theory of pulsed NMR
• Learn the configuration and operation of a PNMR system
• Interpret NMR phenomena using the classical vector model

Spin Echo and Free Induction Decay Analysis:

• Observe Free Induction Decay (FID) signals
• Observe Spin Echo (SE) signals
• Measure spin-spin relaxation time (T₂)

Magnetic Field Homogeneity Investigation:

• Analyze the influence of magnetic field homogeneity on NMR signals
• Study signal quality and relaxation behavior under different conditions

Spin-Lattice Relaxation Measurement:

• Measure spin-lattice relaxation time (T₁)
• Apply inversion recovery method for T₁ determination

Relaxation Mechanism Studies:

• Investigate nuclear relaxation processes
• Observe the influence of paramagnetic ions on relaxation times

Concentration Dependence of Relaxation Time:

• Measure T₂ values of copper sulfate solutions at different concentrations
• Determine the relationship between concentration and relaxation time

Chemical Shift Measurement:

• Measure relative chemical displacement of specimens
• Understand the concept of chemical shift in NMR spectroscopy

• Pulsed Nuclear Magnetic Resonance Studies
• Relaxation Time Measurements
• Spin Dynamics Investigations
• Magnetic Resonance Spectroscopy Training
• Advanced Physics Laboratory Education
• Materials Characterization Studies
• Research and Teaching Applications

Modulation Field Power Supply:

• Maximum Current: 0.5 A

Modulation Field Voltage:

• 0 – 6.00 V Adjustable

Homogeneous Field Power Supply:

• Maximum Current: 0.5 A

Homogeneous Field Voltage:

• 0 – 6.00 V Adjustable

Oscillator Frequency:

• 20 MHz

Magnetic Field Strength:

• 0.470 T

Magnetic Pole Diameter:

• 100 mm

Magnetic Pole Distance:

• 20 mm

Magnetic Field Homogeneity:

• 20 ppm
• Measurement Volume: 10 mm × 10 mm × 10 mm

Controlled Temperature:

• 36.500 °C

Magnetic Field Stability:

• Frequency Drift Less Than 5 Hz/Minute After Warm-Up

Warm-Up Time:

• Approximately 4 Hours

Components Included:

Constant Temperature Unit:

• Quantity: 1

RF Transmitting Unit:

• Quantity: 1

Signal Receiving Unit:

• Quantity: 1

Specimen Tubes:

• Quantity: 10

Power Cord:

• Quantity: 1

Connection Cables:

• Quantity: 12

Instruction Manual:

• Quantity: 1

Unit Details:

Constant Temperature Unit:

• High-Homogeneity Magnet
• Precision Temperature Control System

RF Transmitting Unit:

• DDS Pulse Generation Technology
• Modulation Field Power Supply

Signal Receiving Unit:

• Homogeneous Field Power Supply
• Temperature Display System
• Signal Acquisition Electronics

Software System:

• User-Friendly Experiment Control Interface
• Real-Time Signal Acquisition
• FFT Spectrum Analysis
• Data Processing and Storage

• 10 Ready-to-Use Specimen Tubes
• Highly Homogeneous Magnetic Field
• Stable and Reliable Experimental Data
• DDS Digital Pulse Generation Technology
• PID Temperature Control System
• User-Friendly Software Interface
• Convenient Operation and Data Analysis
• Comprehensive Experimental Content
• Ideal for Advanced Physics Laboratories
• High Magnetic Field Homogeneity
• Stable Temperature-Controlled Operation
• Advanced DDS Pulse Technology
• FFT-Based Signal Analysis
• Stronger Signal Detection Compared to CW-NMR
• Comprehensive Educational Experiments
• Easy-to-Use Software Interface
• Complete Ready-to-Operate System