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公开(公告)号：EP0807955A3
公开(公告)日：2000-04-19
申请号：EP97303235.2
申请日：1997-05-13
发明人： Day, Derek J. , Majidi-Ahy, Reza , Fencl, Willi , Riem, Heinrich , Provencale, Salvatore , Staehelin, Rolf
IPC分类号： H01J47/02
CPC分类号： H01J47/028 , G01T1/185
摘要： The present invention provides electrode assemblies for LIC imagers that maximize ion collection and the electric field for the minimum bias voltage. To achieve this optimization the ion collection is confined to small regions. Due to this limited ion collection region, high neutralization efficiencies and fast sweep-out times can be obtained. Furthermore, with an electrode separation of approximately 0.1 millimeters, pulse voltages of less than 100 volts can be used. Low voltages result in improved reliability, longer system life, and lower safety risks.
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公开(公告)号：EP0992279A2
公开(公告)日：2000-04-12
申请号：EP99123275.2
申请日：1996-09-25
CPC分类号： G01N1/405 , B01D61/00 , B01D61/18 , B01D63/16 , G01N2030/009 , G01N2030/062
摘要： Solid phase microextraction and analysis of analytes in a fluid carrier is carried out within a housing (62) in which a fiber (46) is vibrated during microextraction. The housing (62) contains access device so that the carrier and analytes can be brought into contact with the vibrating fiber (46) during the extraction stage. According to the present invention, the vibrating device comprises a membrane (32), a solenoid for vibrating the membrane (32), a frame, a retainer mounted on the frame for holding the solenoid, a holder (34) for the membrane (32), and a retainer arm (36) having one end connected to the retainer and the other end attached to the holder (34).
摘要翻译： 流体载体中分析物的固相微萃取和分析在壳体（62）内进行，在微型萃取过程中纤维（46）在壳体（62）中振动。 壳体（62）包含进入装置，使得载体和分析物可以在提取阶段与振动纤维（46）接触。 根据本发明，振动装置包括膜（32），用于振动膜（32）的螺线管，框架，安装在框架上用于保持螺线管的保持器，用于膜（32）的保持器（34） ）以及一端与保持器连接并且另一端与保持器（34）连接的保持臂（36）。
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公开(公告)号：EP0991106A2
公开(公告)日：2000-04-05
申请号：EP99123769.4
申请日：1991-11-21
CPC分类号： H01J35/04 , H01J35/16 , H01J35/18 , H01J2235/122 , H01J2235/1262 , H01J2235/167 , H01J2235/168
摘要： A high power x-ray generating tube (2) for reducing the effects of excessive heating of the window (16) through which the x-rays (16) are transmitted. The x-ray generating tube consists of a metal center section (6) having a stationary cathode (8) and a rotating anode (10). Various embodiments are employed for deflecting secondary electrons back scattered from the anode away from the window to avoid overheating of the window. A grounded anode simplifies the mechanisms required to prevent overheating.
摘要翻译： 一种高功率X射线发生管（2），用于减少透过X射线（16）的窗口（16）的过度加热的影响。 该X射线发生管由具有固定阴极（8）和旋转阳极（10）的金属中心部分（6）组成。 使用各种实施例来将从阳极反向散射的二次电子偏转离开窗口以避免窗口过热。 阳极接地简化了防止过热所需的机制。
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公开(公告)号：EP0632258B1
公开(公告)日：1999-08-25
申请号：EP94304749.8
申请日：1994-06-29
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5.发明授权
公开(公告)号：EP0562865B1
公开(公告)日：1999-08-25
申请号：EP93302320.2
申请日：1993-03-25
发明人： Lewis, David H. , Wind, Robert, A.
IPC分类号： G01R33/30
CPC分类号： G01R33/307
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公开(公告)号：EP0579935B1
公开(公告)日：1999-07-28
申请号：EP93108719.1
申请日：1993-05-29
发明人： Wells, Gregory J.
CPC分类号： H01J49/424 , H01J49/4285 , H01J49/429
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公开(公告)号：EP0929907A1
公开(公告)日：1999-07-21
申请号：EP98924860.0
申请日：1998-05-22
IPC分类号： H01J35
CPC分类号： H01J35/105 , H01J2235/1204 , H01J2235/1245 , H01J2235/1262
摘要： An X-ray generation apparatus (10) has a housing (12) comprising an evacuated envelope (14) with a rotatable anode target (20) surrounded by an all metal grounded exterior structure and a cooling system. The cooling system comprises a coolant circulating system with heat exchanger and means for circulating a fluid coolant through an interior of the X-ray generating apparatus; a hollow shield structure (22) with center aperture for passing electron beam; and a cooling block (27) which is disposed proximate to the rotatable anode target and comprises a disk with a plurality of concentric annular channels formed by concentric annular partitions. The shield structure and the disk of the cooling block are made of thermally conductive material. An interior of the shield structure is filled with structures such as pins (35), fins (32) or pack bed (36) which are made of thermally conductive materials. The fluid coolant is circulated through the shield structure, then into the plurality of channels of the cooling block and via an interior of the housing to the heat exchanger for efficient cooling of the X-ray generating apparatus.
摘要翻译： 一种X射线发生装置（10）具有壳体（12），壳体（12）包括具有由全金属接地外部结构和冷却系统围绕的可旋转阳极靶（20）的真空封壳（14）。 冷却系统包括具有热交换器的冷却剂循环系统和用于使流体冷却剂循环通过X射线产生装置的内部的装置; 具有用于使电子束通过的中心孔的中空屏蔽结构（22） 以及靠近可旋转阳极靶设置的冷却块（27），并包括具有由同心环形分隔件形成的多个同心环形通道的盘。 屏蔽结构和冷却块的盘由导热材料制成。 屏蔽结构的内部填充有诸如由导热材料制成的销（35），翅片（32）或填充床（36）的结构。 流体冷却剂循环通过屏蔽结构，然后进入冷却块的多个通道并且经由壳体的内部到达热交换器，用于X射线发生装置的有效冷却。
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公开(公告)号：EP0910803A1
公开(公告)日：1999-04-28
申请号：EP98918170.0
申请日：1998-04-09
IPC分类号： G01R33
CPC分类号： G01R33/34046
摘要： A symmetric RF coil for use in a probe for NMR apparatus comprises an odd number of turns having generally straight portions and arc-shaped portions wound alternately in series on the curved surface of a cylindrical sample region. An additional pair of arc-shaped segments connect to the outermost turn to form continuous end rings, and to split the current on the outermost turn to the continuous end rings. Such an RF probe coil possesses material symmetry provided by the additional arc-shaped segments and RF symmetry as a result of the symmetry in current flow generated by the split in current of the outermost turn to the continuous end rings. The symmetric odd-turn RF coil achieves NMR performance at the same level of even-turn coils with high RF homogeneity, and is suitable for high resolution NMR applications. The coil inductance of the present invention bridges the gap between even-turn coils, and facilitates improved optimization of the resonance circuits over the entire operating range.
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公开(公告)号：EP0900428A1
公开(公告)日：1999-03-10
申请号：EP97950706.0
申请日：1997-11-26
摘要： A multiple mode digital X-ray imaging system providing for preprocessing 'binning' of analog pixel signals from a detector array by selectively summing, within the detector array, adjacent pixel charges on a row-by-row basis and selectively summing, within detector array readout circuits, the previously summed pixel charges (by rows) on a column-by-column basis. An array, or mapping, of 'defective pixel' flags is used to identify defective pixels within the detector array, with such flags being added to, or inserted into, the incoming data stream for dynamic processing along with the incoming pixel data. A buffer and filter is used to perform still image capture during the radiographic mode of operation and to recursively filter incoming data frames during the fluoroscopic mode of operation by summing a scaled amount of pixel data from prior data frames with a scaled amount of incoming pixel data from the present data frame.
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公开(公告)号：EP0547918B1
公开(公告)日：1999-03-03
申请号：EP92311585.1
申请日：1992-12-18
发明人： Cummings, Michael D.
IPC分类号： G01R33/30
CPC分类号： B01L3/5082 , G01R33/30 , G01R33/307
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