公开(公告)号：US5220800A

公开(公告)日：1993-06-22

申请号：US806006

申请日：1991-12-09

申请人： Wolfgang H. Muller ,  Gerhard Roth ,  Wolfgang Stautner ,  Peter Turowski ,  Wolfgang Lehmann ,  Franz Graf

发明人： Wolfgang H. Muller ,  Gerhard Roth ,  Wolfgang Stautner ,  Peter Turowski ,  Wolfgang Lehmann ,  Franz Graf

IPC分类号： F17C13/00 ,  G01R33/3815 ,  H01F6/04

CPC分类号： H01F6/04 ,  G01R33/3815 ,  Y10S505/892

摘要： In an NMR magnet system for generating a highly homogeneous magnetic field of high field strength, with at least one superconducting magnet coil which is arranged in a first chamber of a cryostat in supercooled liquid helium at a temperature of less than 4.2K, with the cryostat having at least one further chamber containing liquid helium that is essentially at atmospheric pressure with a temperature of approximately 4.2K, the first chamber is connected to the further chamber in such a way that the supercooled liquid helium located in the first chamber is also essentially at atmospheric pressure. A refrigerator with which the liquid helium can be cooled to a temperature T

摘要翻译： 在用于产生高场强的高均匀磁场的NMR磁体系统中，至少有一个超导磁体线圈被布置在低于4.2K的温度的过冷液体氦的低温恒温器的第一室中，与低温恒温器 具有至少一个另外的室，其包含基本上处于大气压下的约4.2K的液态氦，第一室连接到另一个室，使得位于第一室中的过冷液态氦也基本上处于 气压。 在第一室中设置有可将液氦冷却至温度T << 4.2K，特别是T大约1.8-2.3K的冰箱。

公开(公告)号：US4727346A

公开(公告)日：1988-02-23

申请号：US905681

申请日：1986-09-09

申请人： Michael Westphal ,  Wolfgang H. Muller

发明人： Michael Westphal ,  Wolfgang H. Muller

IPC分类号： H01F6/02 ,  H02H7/00 ,  H01F7/22

CPC分类号： H01F6/02 ,  H02H7/001 ,  Y02E40/68

摘要： A magnet coil (30) comprises at least one first winding made of wire (34) which is superconductive at operating temperature and at least one second winding made of normally conductive wire (36). In addition, means are provided for supplying a current into the second winding, which is completely dead during superconductive operation of the magnet coil (30), when at least certain sections of the superconductive wire (34) assume the normally conductive state.In order to accelerate the spatial propagation of this transition in the magnet coil (30) and at the same time to provide the possibility to use low-cost wires having a relatively small proportion, related to the cross-sectional area, of normally conductive material, the first and the second winding are connected in parallel electrically.

摘要翻译： 电磁线圈（30）包括由工作温度下超导的至少一根由导线（34）制成的第一绕组和由正常导线（36）制成的至少一个第二绕组。 此外，当超导线（34）的至少某些部分处于正常导通状态时，提供用于在电磁线圈（30）的超导操作期间将电流供应到第二绕组中的电流完全死亡的装置。 为了加速电磁线圈（30）中的该过渡的空间传播，并且同时提供使用正常导电材料的与横截面积相关的比例相对较小的低成本电线的可能性 ，第一和第二绕组并联连接。

公开(公告)号：US5173661A

公开(公告)日：1992-12-22

申请号：US610373

申请日：1990-11-06

申请人： Bertold Knuttel ,  Wolfgang H. Muller

发明人： Bertold Knuttel ,  Wolfgang H. Muller

IPC分类号： G01R33/3875

CPC分类号： G01R33/3875

摘要： A nuclear magnetic resonance spectrometer, in particular a nuclear spin tomograph serving to investigate biological samples, comprising a magnetic coil for generating a substantially homogeneous magnetic field in a volume under examination, and a set of shim coils for eliminating any remaining inhomogeneities of the magnetic field is characterized in that at least one additional electric conductor, preferably an additional shim coil, is provided which may be arranged in the volume under examination, in the direct vicinity of the sample, that the additional conductor is designed in such a way that it will generate an inhomogeneous magnetic field when loaded with current, and that it can be loaded with currents of a type generating inhomogeneous magnetic fields which will eliminate, at least partially, and in a selected area in the sample, local field inhomogeneities resulting from susceptibility variations within the sample, for example. This enables the accuracy of the spectroscopy results to be improved.

摘要翻译： 核磁共振光谱仪，特别是用于研究生物样品的核自旋断层扫描仪，包括用于在检测体积内产生基本上均匀的磁场的磁线圈，以及用于消除磁场的任何剩余不均匀性的一组垫片线圈 其特征在于，提供至少一个额外的电导体，优选地附加的垫片线圈，其可以布置在被检体内，在样品的附近，附加导体被设计成使得它将 在加载电流时会产生不均匀的磁场，并且可以加载产生不均匀磁场的类型的电流，这些电流将至少部分地消除样品中的选定区域，并且在样品中的选定区域内产生的局部场不均匀性 例如。 这使得能够提高光谱结果的精度。

公开(公告)号：US5406205A

公开(公告)日：1995-04-11

申请号：US215889

申请日：1994-03-21

申请人： Wolfgang H. Muller

发明人： Wolfgang H. Muller

IPC分类号： G01R33/385 ,  G01R33/20

CPC分类号： G01R33/385

摘要： A system for the generation of magnetic gradient fields which intermittently overlap the static magnetic field of a nuclear-spin tomograph, with at least one pair of gradient coils, powered from a power supply, through which current flows in series when in operation and which generate, in a predefined volume under examination, a gradient magnetic field that varies at least approximately in linear fashion with position in one direction, is characterized in that each gradient coil (A, B) has one set with at least one first winding zone (S1) and one set with at least one second winding zone (S2), which have terminals (16, 17; 18, 19) that are separate from one another, in such a way that the winding zones can be easily be connected to and separated from one another in varying ways. The user can thereby modify the properties of the gradient system.

摘要翻译： 一种产生磁梯度场的系统，其间断地与核自旋断层摄影机的静磁场重叠，至少有一对梯形线圈由电源供电，当电流在运行时电流串联流过， 在检查中的预定体积中，以一个方向上的位置至少大致以线性方式变化的梯度磁场的特征在于，每个梯度线圈（A，B）具有一组具有至少一个第一绕组区域（S1 ）和具有至少一个第二绕组区（S2）的一组，其具有彼此分离的端子（16,17,18,19），使得绕组区域可以容易地连接并分离 从不同的方式彼此。 因此，用户可以修改梯度系统的属性。