¹³C-Optimized HTS NMR RF Coil Design at 21.1 T

Area of Science:

• Magnetic Resonance Spectroscopy
• Superconducting Materials Science
• Coil Engineering

Background:

• Nuclear Magnetic Resonance (NMR) spectroscopy requires highly sensitive transmitter/receiver coils for optimal performance.
• Existing NMR coils face limitations in sensitivity and applicability for specific nuclei like carbon-13 (¹³C).
• High-temperature superconductors offer potential for enhanced coil performance due to their unique electrical properties.

Purpose of the Study:

• To design and evaluate a novel high-temperature superconductor double-sided racetrack resonator for ¹³C optimized NMR.
• To improve current density homogeneity and resonance frequency control in NMR coils.
• To enhance the suitability of NMR probes for both ¹H and ¹³C spectroscopy.

Main Methods:

• Design of a double-sided racetrack resonator utilizing high-temperature superconductors.
• Incorporation of revised finger lengths to optimize current density distribution.
• Implementation of a laser trimming technique for precise resonance frequency adjustment.
• Utilizing advanced simulations and experimental validation to assess resonator performance.

Main Results:

• Demonstrated a novel high-temperature superconductor resonator design for NMR applications.
• Achieved improved homogeneity of current density across resonator elements.
• Successfully implemented a laser trimming method for accurate resonance frequency tuning.
• Showcased the ability to shift higher-order modes for versatile ¹H/¹³C NMR probe integration.

Conclusions:

• The developed superconductor resonator design offers significant advantages for ¹³C NMR spectroscopy.
• The design innovations enhance coil performance, enabling broader applicability in NMR.
• This work paves the way for more sensitive and versatile NMR probes.