Conference paper
Tunable 13C/1H dual channel matching circuit for dynamic nuclear polarization system with cross-polarization
Department of Electrical Engineering, Technical University of Denmark1
Electromagnetic Systems, Department of Electrical Engineering, Technical University of Denmark2
Center for Hyperpolarization in Magnetic Resonance, Centers, Technical University of Denmark3
Center for Magnetic Resonance, Department of Electrical Engineering, Technical University of Denmark4
In this paper we report initial results of design and practical implementation of tuning and matching circuit to estimate a performance of Dynamic Nuclear Polarization (DNP) at a magnetic field of 6.7 T. It is shown that developed circuit for signal observation is compact, easy to make and provides low return loss (typically better than −45 dB) at a tuning range ±3 MHz for both resonant frequencies.
In addition, transmission parameters measured between 13C and 1H channels are less than −17 dB and −50 dB for 71.8 MHz and 285.5 MHz, respectively showing a good isolation between the two channels. Measurement results with a tuning and matching circuit prototype are presented including obtained spectra (13C and 1H) and estimation of the signal-to-noise ratio.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2016 |
| Pages: | 1227-1230 |
| Proceedings: | 46th European Microwave Conference |
| ISBN: | 1509015140 , 2874870439 , 9781509015146 and 9782874870439 |
| Types: | Conference paper |
| DOI: | 10.1109/EuMC.2016.7824571 |
| ORCIDs: | Rybalko, Oleksandr , Bowen, Sean , Zhurbenko, Vitaliy and Ardenkjær-Larsen, Jan Henrik |
Carbon Circuit Coils Dynamic nuclear polarization Enhancement Losses Polarization Protons RLC circuits Resonant frequency Tuning Tuning range
DNP circuit circuit tuning cross-polarization dynamic nuclear polarization dynamic nuclear polarization system enhancement estimation theory frequency 71.8 MHz to 285.5 MHz losses magnetic circuits magnetic field magnetic fields magnetic flux density 6.7 T nuclear polarisation resonant frequencies resonant frequency return loss signal observation signal-to-noise ratio estimation tunable 13C/1H dual channel matching circuit tuning range
