DESIGN AND CONSTRUCTION OF A NOVEL 600MHZ NMR MAGNET

这项研究的长期目标是产生一个较短的几何高度 将对成像研究人员以及 比目前价格低的高分辨率核磁共振光谱仪 设计。固体需求的核磁共振显微镜和磁共振成像研究进展 增强场强以改善信噪比和 因此提高了敏感度。 现有NbTi外磁体用Nb3Sn型超导插件的设计 使用一种新的连接技术将使稳定的短路磁铁得以进化。 在新的连接技术的可行性研究之后，第二阶段 目标是生产一种基于四线圈的600 MHz、1H频率的磁体 几何形状而不是端部校正，六阶长螺线管 传统上用于高分辨率核磁共振磁体。较大的内径 四个线圈的几何形状将允许插入用于成像的梯度线圈 目的，同时为探头和样品留出合理的空间。 四个线圈几何形状的先决条件是整体解决方案 连接长度问题，如下所述。它的目的也是为了让这个 研究将产生比现有系统成本更低的600 MHz磁铁 只有一家非美国公司提供，标价为 62.4万美元。

The long term goal of this research is to produce a shorter geometry high field magnet that will be useful to the imaging researcher as well as the high resolution NMR spectroscopist at a lower cost than currently available designs. Advances in NMR microscopy and MR imaging of solids demands increased field strength for improvement of the signal to noise ratio and hence increased sensitivity. Design of a superconducting Nb3Sn insert for an existing NbTi outer magnet using a new jointing technique will enable a stable short magnet to evolve. Following feasibility studies of the new jointing technique the phase 2 goal is to produce a 600MHz,1H frequency magnet based on a four coil geometry rather than the end corrected, sixth order long solenoid traditionally used for high resolution NMR magnets. The larger bore of the four coil geometry will permit the insertion of gradient coils for imaging purposes while leaving reasonable space for the probe and sample. A prerequisite for the four coil geometry is a solution to the overall joint length problem, described below. It is also the intention that this research will result in a lower cost 600MHz magnet than the existing system that is available from only one non USA company at a list price of $624,000.