论文和技术资料

Nuclear Quadrupole Resonance (RQN) is a radio frequency (RF) spectroscopic technique that is used to detect quadrupole nuclei such as Nitrogen-14. NQR was found to be a good candidate for detecting narcotics, explosives and medicines [1]. However, due to its low sensitivity the use of NQR is still limited. One way to increase the sensitivity is to improve the RF coil by means of a better RF magnetic field homogeneity and a greater quality factor. In this study we will discuss the design of multi-layer surface coil used in remote NQR detection [2]. In this kind of study simulation can be very helpful. In order to optimize the geometry (distance between layers, dimensions ...), we have used COMSOL Multiphysics® (ACDC module and RF module). Different configurations were compared. COMSOL Multiphysics®, we demonstrated that to improve the performances of a multi-layers surface coil, the geometry has to be chosen carefully.