公开(公告)号：US09663358B1

公开(公告)日：2017-05-30

申请号：US13533390

申请日：2012-06-26

申请人： David G. Cory ,  Troy W. Borneman ,  Christopher E. Granade

发明人： David G. Cory ,  Troy W. Borneman ,  Christopher E. Granade

IPC分类号： G06F15/00 ,  G06F7/38 ,  G06F9/00 ,  G06F9/44 ,  B82Y10/00

CPC分类号： B82Y10/00 ,  G06F7/38 ,  G06F9/00 ,  G06N99/002 ,  H04L9/0855

摘要： A quantum information processor can include a control system and a system of processor nodes. Each of the processor nodes can include multiple qubits and an actuator. The control system can manipulate the qubits of multiple processor nodes based on cross-node quantum interactions between the qubits. In some instances, the control system may perform multi-qubit quantum gates on qubits of different processor nodes based on the cross-node quantum interactions. Within each processor node, the qubits interact with the actuator by an intra-node quantum coupling. Between processor nodes, the actuators interact with each other by an inter-node quantum coupling. The cross-node quantum interaction can be produced by non-commutivity of the intra-node quantum couplings and the inter-node quantum couplings. In some instances, the qubits can be manipulated by applying a control sequence that produces an interaction frame where the cross-node quantum interaction dominates the time evolution of the system.

公开(公告)号：US5546000A

公开(公告)日：1996-08-13

申请号：US409641

申请日：1995-03-24

申请人： Werner E. Maas ,  David G. Cory ,  Frank H. Laukien

发明人： Werner E. Maas ,  David G. Cory ,  Frank H. Laukien

IPC分类号： G01R33/36 ,  G01R33/20

CPC分类号： G01R33/3671 ,  G01R33/3628 ,  G01R33/3621

摘要： A method of reducing radiation damping during free induction decay in NMR measurements of samples having a narrow line width uses the active switching of the quality factor value of the coil circuit of an NMR detection probe. After application of an excitation pulse to the sample, data acquisition is accomplished in periodic samples. The Q of the coil circuit is set to a high value while each sample is being taken, but is reduced significantly in between samples by detuning the coil circuit. Minimization of the high-Q state of the coil circuit and maximization of the difference between the high Q value and the low Q value greatly decrease the detrimental effects of radiation damping on free induction decay. The coil circuit Q is modified automatically by the application of a Q switching signal generated by a controller, such as a computer which controls other aspect of the NMR experiment.

摘要翻译： 在具有窄线宽的样品的NMR测量中，在自由感应衰减期间减小辐射阻尼的方法使用NMR检测探针的线圈电路的品质因数值的有效切换。 在向样品施加激发脉冲之后，在周期性样品中完成数据采集。 线圈电路的Q值被设定为高值，而每个样品被取出，但是通过使线圈电路失谐而在样品之间显着降低。 线圈电路的高Q状态的最小化和高Q值与低Q值之差的最大化大大降低了辐射阻尼对自由感应衰减的有害影响。 线圈电路Q通过应用由控制器（诸如控制NMR实验的另一方面的计算机）产生的Q开关信号而自动修改。

公开(公告)号：US5539315A

公开(公告)日：1996-07-23

申请号：US410095

申请日：1995-03-24

申请人： David G. Cory ,  Joel T. Lewandowski ,  Werner E. Maas

发明人： David G. Cory ,  Joel T. Lewandowski ,  Werner E. Maas

IPC分类号： G01R33/34 ,  G01R33/20

CPC分类号： G01R33/3635 ,  G01R33/34053 ,  G01R33/3415 ,  G01R33/34092

摘要： A nuclear magnetic resonance cross polarization probe uses a dual-coil arrangement in which a single-turn inner coil is surrounded by a solenoid coil. The inner coil is tuned to the frequency of a relatively high Larmor frequency nuclei type, such as proton. The solenoid coil is tuned to a lower Larmor frequency nuclei type. An inner sample region surrounded by the inner coil has a first magnetic field component induced by an electrical signal at the relatively high frequency in the inner coil. An electrical signal at the lower frequency is input to the solenoid coil and results in the generation of a magnetic field alternating at the lower frequency. This field induces a current in the inner coil at the lower frequency that, in turn, induces a magnetic field component in the inner region at the lower frequency. Because the structure of the relatively high magnetic field component and the lower magnetic field component in the inner region are both dictated by the shape of the inner coil, a good spatial matching of the fields is obtained resulting in a good Hartman-Hahn match across the sample volume.

摘要翻译： 核磁共振交叉极化探针使用双线圈装置，其中单匝内线圈被电磁线圈包围。 内部线圈被调谐到相对较高的拉莫尔频率核型（例如质子）的频率。 电磁线圈调谐到较低的拉莫尔频率核型。 由内部线圈围绕的内部采样区域具有由内部线圈中较高频率的电信号感应的第一磁场分量。 较低频率的电信号被输入到螺线管线圈，并导致在较低频率下交替的磁场的产生。 该场以较低频率在内部线圈中感应出电流，这又导致较低频率的内部区域中的磁场分量。 由于内部区域的相对较高的磁场分量和较低的磁场分量的结构都是由内部线圈的形状决定的，所以获得了良好的场的空间匹配，从而导致了整个的Hartman-Hahn匹配 样品量。

公开(公告)号：US5521504A

公开(公告)日：1996-05-28

申请号：US177761

申请日：1994-01-04

申请人： David G. Cory ,  Frank H. Laukien ,  Werner E. Maas

发明人： David G. Cory ,  Frank H. Laukien ,  Werner E. Maas

IPC分类号： G01R33/46 ,  G01R33/48 ,  G01R33/483 ,  G01V3/00

CPC分类号： G01R33/446 ,  G01R33/46 ,  G01R33/4831

摘要： A composite RF pulse is created from a sequence of conventional homogeneous RF pulses and conventional gradient RF pulses and the composite pulse generates a gradient magnetic field with a spatially varying amplitude, but a spatially independent phase. In one embodiment of the invention, the pulse sequence consists of four conventional gradient RF pulses interspersed with two conventional homogeneous RF pulses. In another embodiment of the invention, a conventional gradient RF pulse is combined with a conventional homogeneous RF pulse and the pulse pair is repeated in order to generate an effective magnetic field with a spatially varying amplitude, but a spatially independent phase.

摘要翻译： 复合RF脉冲是从传统的均匀RF脉冲序列和常规梯度RF脉冲序列产生的，并且复合脉冲产生具有空间变化幅度但空间上独立相位的梯度磁场。 在本发明的一个实施例中，脉冲序列由散布有两个常规均匀RF脉冲的四个常规梯度RF脉冲组成。 在本发明的另一个实施例中，传统的梯度RF脉冲与传统的均匀RF脉冲组合，并且重复脉冲对以便产生具有空间变化幅度但空间上独立相位的有效磁场。

公开(公告)号：US5260655A

公开(公告)日：1993-11-09

申请号：US860847

申请日：1992-03-31

申请人： David G. Cory

发明人： David G. Cory

IPC分类号： G01R33/54 ,  G01R33/20

CPC分类号： G01R33/4816

摘要： In an NMR solid-state imaging experiment, second averaging is carried out during the experiment to reduce the effects of unwanted interactions that obscure the results of an interaction of interest. The second averaging is arranged so that the second averaging interaction and the interaction of interest are along the same axis, but are separated in time. The second averaging interaction is further designed to introduce a multiple of .pi./2 phase offset between applications of the interaction of interest. In this way, even when the sum of the actual resonance frequency and the second averaging frequency are zero, the spin dynamics are still modulated and a second averaging takes place.An additional advantage is provided in that the resonance frequency can be sampled in such a fashion that the second averaging frequency does not appear in the observed resonance frequency.

公开(公告)号：US20130063142A1

公开(公告)日：2013-03-14

申请号：US13228715

申请日：2011-09-09

申请人： Timothy Hopper ,  David G. Cory ,  Yi-Qiao Song ,  Martin D. Hurlimann

发明人： Timothy Hopper ,  David G. Cory ,  Yi-Qiao Song ,  Martin D. Hurlimann

IPC分类号： G01V3/00

CPC分类号： G01V3/32 ,  G01N24/081 ,  G01R33/3415

摘要： An NMR apparatus disposed in a wellbore and having an array of two or more NMR sensors located at substantially the same axial position on the NMR apparatus and having different directional sensitivities is used to acquire an NMR signal from at least two of the two or more NMR sensors. The NMR signals are combined to obtain borehole information. The borehole information may include an azimuthal image of the formation surrounding the borehole. The azimuthal image may be a formation porosity image, a formation bound fluid image, a T2 distribution image, a T2 log mean image, a formation permeability image, or a formation fluid viscosity image. If two or more pre-amplifiers and receiver circuitry are also provided, the NMR signals may be combined prior to passing through the pre-amplifiers and receiver circuitry to improve the signal to noise ratio of the total signal from the desired sample space.

摘要翻译： 设置在井筒中并且具有位于NMR装置上基本上相同的轴向位置且具有不同方向灵敏度的两个或更多个NMR传感器的阵列的NMR装置用于从两个或更多个NMR中的至少两个获得NMR信号 传感器。 NMR信号被组合以获得井眼信息。 钻孔信息可以包括围绕钻孔的地层的方位角图像。 方位角图像可以是地层孔隙度图像，地层结合流体图像，T2分布图像，T2对数平均图像，地层渗透率图像或地层流体粘度图像。 如果还提供两个或更多个前置放大器和接收器电路，则可以在通过前置放大器和接收器电路之前组合NMR信号，以提高来自期望采样空间的总信号的信噪比。

公开(公告)号：US5394088A

公开(公告)日：1995-02-28

申请号：US194112

申请日：1994-02-08

申请人： David G. Cory

发明人： David G. Cory

IPC分类号： G01R33/30 ,  G01R33/34 ,  G01V3/00

CPC分类号： G01R33/34 ,  G01R33/30

摘要： A small sample imaging apparatus replaces the dewar which normally passes along the axis of an NMR imaging probe. The small sample imaging apparatus incorporates an integral RF coil and capacitor resonant circuit. The coil and capacitor are positioned adjacent to each other and remotely at the end of a projecting stalk. Stray inductance effects are thereby avoided and the stalk physically positions the resonant circuit at substantially the properly centered location. The stalk which positions the coil and capacitor may be formed from a length of rigid coaxial cable which carried RF energy to the resonant circuit. When large samples are imaged, the conventional probe coil insert can be utilized in the normal manner. However, when smaller samples are images, the adapter can be attached to the probe and the adaptor resonant circuit can be utilized.

摘要翻译： 小样本成像装置代替通常沿着NMR成像探针的轴线通过的杜瓦瓶。 小型样本成像装置包含一个整体RF线圈和电容谐振电路。 线圈和电容器彼此相邻定位并远离突出的茎的末端。 从而避免了杂散电感效应，并且该物体将谐振电路物理地定位在基本正确居中的位置。 定位线圈和电容器的杆可以由承载RF能量的谐振电路的刚性同轴电缆的长度形成。 当大样本被成像时，常规探针线圈插入件可以以正常方式使用。 然而，当较小的样本是图像时，适配器可以附接到探针，并且可以利用适配器谐振电路。

公开(公告)号：US5208536A

公开(公告)日：1993-05-04

申请号：US724876

申请日：1991-07-02

申请人： David G. Cory

发明人： David G. Cory

IPC分类号： G01R33/54

CPC分类号： G01R33/4816

摘要： A multiple-pulse RF pulse sequence applied in the presence of an oscillating magnetic field gradient enables slice selection in a magic angle spinning nuclear magnetic resonance solids imaging system. Slice selectivity is produced by a series of RF pulses, some of which introduce a nutation that coherently adds for only a selected slice plane of the sample and averages to zero in other areas and some of which average certain gradient-induced modulations so that only those object areas in the selected slice contribute to the output. The pulse train is applied in a manner synchronous with rotor rotation so that rotation induced modulations average to zero over one or more rotor rotation periods.

摘要翻译： 在存在振荡磁场梯度的情况下应用的多脉冲RF脉冲序列使得能够在魔角旋转核磁共振固体成像系统中进行切片选择。 切片选择性由一系列RF脉冲产生，其中一些引入了仅对样品的选定切片平面相干地添加的章动，并且在其它区域中平均为零，其中一些平均为某些梯度诱导的调制，使得仅那些 所选切片中的对象区域有助于输出。 脉冲串以与转子旋转同步的方式施加，使得在一个或多个转子旋转周期上的旋转感应调制平均为零。

公开(公告)号：US5872452A

公开(公告)日：1999-02-16

申请号：US794477

申请日：1997-02-04

申请人： David G. Cory ,  Joel T. Lewandowski

发明人： David G. Cory ,  Joel T. Lewandowski

IPC分类号： G01R33/30 ,  G01R33/385 ,  G01V3/00

CPC分类号： G01R33/307 ,  G01R33/385

摘要： A gradient magnetic field generator is provided for generating a spatially varying gradient magnetic field for use with a nuclear magnetic resonance spectroscopy probe having a rotatable sample container. The gradient field generator has a plurality of straight line conductive segments which lie parallel to one another and perpendicular to a plane within which lies a rotation axis about which the sample container rotates. The straight line conductive segments each conduct a current which generates a component of the overall gradient magnetic field. The conductive segments preferably lie in a cylindrical distribution about a stator within which the sample container is rotated. The appropriate currents for the conductive segments may be determined by finding a solution for the Jacobian which defines the magnetic field variations in the three-dimensional space of the stator. Finding an appropriate solution is simplified by presuming the cylindrical distribution of conductive segments and allowing restriction due to the size and shape of the stator, and the physical space between the stator and an inner surface of the probe housing.

摘要翻译： 提供梯度磁场发生器用于产生用于具有可旋转样品容器的核磁共振光谱探测器的空间变化梯度磁场。 梯度场发生器具有多个直线导电段，它们彼此平行并且垂直于其中位于样品容器旋转的旋转轴线的平面。 直线导电段各自传导产生总梯度磁场分量的电流。 导电段优选位于围绕定子的圆柱形分布中，样品容器在其中旋转。 可以通过找到定义定子的三维空间中的磁场变化的雅可比方程来确定导电段的适当电流。 通过假设导电段的圆柱形分布并且由于定子的尺寸和形状以及定子和探针壳体的内表面之间的物理空间而允许限制，可以简化寻找合适的解决方案。

公开(公告)号：US5532594A

公开(公告)日：1996-07-02

申请号：US223699

申请日：1994-04-06

申请人： David G. Cory ,  Werner E. Maas

发明人： David G. Cory ,  Werner E. Maas

IPC分类号： G01R33/46 ,  G01R33/483 ,  G01R33/20

CPC分类号： G01R33/4608

摘要： B.sub.1 (RF) gradient echo pulse sequences are combined with frequency-selective pulse sequences to selectively suppress a solvent resonance signal by preventing the formation of an echo for the solvent resonance, while allowing the formation of an echo for the sample resonances under study. The RF gradient pulses may be planar or radial pulses. A pulse sequence for suppressing a solvent resonance signal in NMR experiments comprises a pair of (RF) gradient pulses which sandwich a selective inversion pulse sequence. In accordance with one embodiment of the invention, the RF gradient pulses are anti-symmetric (have opposite phase) and the selective inversion pulse sequence comprises a homogeneous frequency-selective inversion pulse, such as a .pi. pulse, applied in time between the two RF gradient pulses. In accordance with another embodiment of the invention, the RF gradient pulses are symmetric (have the same phase) and the selective inversion pulse sequence comprises a pulse sequence which has an excitation profile with a null at the frequency of the resonance to be suppressed.

摘要翻译： B1（RF）梯度回波脉冲序列与频率选择脉冲序列组合，以通过阻止形成用于溶剂共振的回波而选择性地抑制溶剂共振信号，同时允许形成用于所研究的样品共振的回波。 RF梯度脉冲可以是平面或径向脉冲。 在NMR实验中用于抑制溶剂共振信号的脉冲序列包括夹着选择性反转脉冲序列的一对（RF）梯度脉冲。 根据本发明的一个实施例，RF梯度脉冲是反对称的（具有相反的相位），并且选择性反转脉冲序列包括均匀的频率选择性反转脉冲，诸如在两个RF之间的时间上施加的pi脉冲 梯度脉冲。 根据本发明的另一个实施例，RF梯度脉冲是对称的（具有相同的相位），并且选择性反转脉冲序列包括脉冲序列，该脉冲序列具有要抑制的谐振频率处的零点的激励分布。