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公开(公告)号：US5712484A
公开(公告)日：1998-01-27
申请号：US589607
申请日：1996-01-22
申请人： Hideo Harada , Isamu Sato
发明人： Hideo Harada , Isamu Sato
CPC分类号： G01T1/34 , G01T1/2018
摘要： A germanium detector measures an energy spectrum of gamma ray flux. The detector includes a copper cooling layer continuous over a periphery of the columnar germanium crystal. The cooling layer reduces current leakage induced by heat, so that high energy gamma rays can be precisely detected. A combination of a plurality of germanium crystal bodies connected one another to form the germanium crystal of at least 20 cm leads to a more precise detection of high energy gamma rays.
摘要翻译： 锗检测器测量伽马射线通量的能谱。 检测器包括在柱状锗晶体的周边上连续的铜冷却层。 冷却层减少了由热引起的电流泄漏，从而可以精确地检测高能γ射线。 将彼此连接以形成至少20cm的锗晶体的多个锗晶体的组合导致更精确地检测高能γ射线。
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公开(公告)号：US2895051A
公开(公告)日：1959-07-14
申请号：US63818657
申请日：1957-02-04
申请人： LAWRENCE CRANBERG
发明人： LAWRENCE CRANBERG
IPC分类号： G01T1/34
CPC分类号： G01T1/34
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公开(公告)号：US20240057953A1
公开(公告)日：2024-02-22
申请号：US18487418
申请日：2023-10-16
发明人： Arundhuti Ganguly , Ivan P. Mollov
CPC分类号： A61B6/4042 , A61B6/4035 , A61B6/482 , G01T1/2006 , G01T1/2014 , G01T1/34
摘要： Some embodiments include an x-ray system, comprising: a housing; a plurality of overlapping imaging layers disposed in the housing, each imaging layer configured to generate an image in response to a corresponding incident x-ray beam; and a plurality of x-ray markers attached to the housing and disposed to affect the incident x-ray beam for each of the imaging layers.
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公开(公告)号：US20100187412A1
公开(公告)日：2010-07-29
申请号：US12417269
申请日：2009-04-02
申请人： Jeffrey Grant , Dale May , Roger Griffiths , Geoff Weller , Christian Stoller
发明人： Jeffrey Grant , Dale May , Roger Griffiths , Geoff Weller , Christian Stoller
IPC分类号： G01V5/10
CPC分类号： G01V5/101 , G01N23/005 , G01N23/222 , G01T1/34 , G01T7/005 , G01V5/102
摘要： A downhole tool and method for performing a base log sigma measurement of a formation. The tool comprising a nuclear source for irradiating the formation and a detector for obtaining a sigma measurement of the irradiated formation. The tool is mounted close to a drill bit arranged to drill a borehole into the formation and is capable of determining a base log sigma measurement of the formation while drilling into the formation.
摘要翻译： 一种用于进行地层的基准对数σ测量的井下工具和方法。 该工具包括用于照射地层的核源和用于获得辐射地层的西格玛测量的检测器。 该工具安装在钻头附近，该钻头布置成钻入地层中的钻孔，并且能够在钻入地层时确定地层的基准对数σ测量。
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公开(公告)号：US11819348B2
公开(公告)日：2023-11-21
申请号：US16836735
申请日：2020-03-31
发明人： Arundhuti Ganguly , Ivan P Mollov
CPC分类号： A61B6/4042 , A61B6/4035 , A61B6/482 , G01T1/2006 , G01T1/2014 , G01T1/34
摘要： Some embodiments include an x-ray system, comprising: an x-ray imager including a plurality of imaging layers; an x-ray source configured to generate an x-ray beam; and an x-ray prefilter; wherein: the x-ray prefilter is configured to adjust an energy spectrum of the x-ray beam to create or decrease a level of x-ray fluence of a local minimum between two of a plurality of local maximums.
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6.发明授权
公开(公告)号：US5859436A
公开(公告)日：1999-01-12
申请号：US912752
申请日：1997-08-18
申请人： Hideo Harada , Isamu Sato
发明人： Hideo Harada , Isamu Sato
CPC分类号： G01T1/34 , G01T1/2018
摘要： A germanium detector measures an energy spectrum of a gamma ray flux. The detector includes a cooling layer continuous over a periphery of the columnar germanium crystal. The cooling layer reduces current leakage induced by heat, so that high energy gamma rays can be precisely detected. A combination of a plurality of germanium crystal bodies connected one another to form the germanium crystal of at least 20 cm leads to a more precise detection of high energy gamma rays. A method for determining a photonuclear reaction cross section using the germanium detector enables measurement of the energy dependence of a photonuclear reaction cross section at high resolution. The method employs a white gamma ray flux radiated to a nuclide. The germanium detector measures the spectrum of a transmission gamma ray flux transmitted through the nuclide. Peaks are specified in the obtained spectrum. An atomic nucleus can be transformed using a monochromatic gamma ray flux having an energy level corresponding to the peak.
摘要翻译： 锗检测器测量伽马射线通量的能谱。 检测器包括在柱状锗晶体的周边上连续的冷却层。 冷却层减少了由热引起的电流泄漏，从而可以精确地检测高能γ射线。 将彼此连接以形成至少20cm的锗晶体的多个锗晶体的组合导致更精确地检测高能γ射线。 使用锗检测器确定光子核反应横截面的方法能够以高分辨率测量光核反应横截面的能量依赖性。 该方法采用辐射到核素的白色γ射线通量。 锗检测器测量透射通过核素的透射γ射线通量的光谱。 在所获得的光谱中指定峰。 可以使用具有与峰值对应的能级的单色伽马射线通量来转换原子核。
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7.发明授权
公开(公告)号：US4264812A
公开(公告)日：1981-04-28
申请号：US94395
申请日：1979-11-14
申请人： Russel R. Randall
发明人： Russel R. Randall
摘要： A source of fast neutrons and a detector responsive to the thermal neutron population decay rate are utilized in a well logging instrument. The instrument is placed within a sample retention chamber. The neutron generator is periodically pulsed and the neutron detector is gated on at intervals of 100-150, 150-200, and 800-850 microseconds, respectively, following the termination of each burst of fast neutrons. The detected radiations within these intervals are used to indicate the apparent absorption cross section of the small fluid sample within the chamber. The absorption cross section is measured for a number of small samples of known salinity and calculatable true absorption cross section. A relationship is constructed of the true absorption cross section of the samples versus the measured absorption cross sections of the samples. When the chamber is filled with an unknown fluid sample the measured absorption cross section is correlated with the reference curve which will yield single unique true absorption cross section substantially free of diffusion effects for the measured absorption cross section value of the unknown small quantity sample.
摘要翻译： 在测井仪器中使用快中子源和响应于热中子群体衰减速率的检测器。 将仪器放置在样品保留室内。 中子发生器周期性脉冲，中子探测器分别在100-150,150-200和800-850微秒的间隔内，每个快中子爆发终止后。 在这些间隔内检测到的辐射用于指示室内小液体样品的表观吸收截面。 对已知盐度和可计算的真实吸收截面的许多小样品测量吸收截面。 由样品的真实吸收截面与样品的测量吸收截面构成关系。 当腔室填充有未知的流体样品时，测量的吸收截面与参考曲线相关，该参考曲线将产生对于未知的小量样品的测量的吸收截面值基本上没有扩散效应的单独唯一的真实吸收截面。
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公开(公告)号：US11892576B2
公开(公告)日：2024-02-06
申请号：US18155314
申请日：2023-01-17
申请人： Excillum AB
发明人： Per Takman , Tomi Tuohimaa , Ulf Lundström
CPC分类号： G01T1/34 , H01J35/153 , H05G1/52 , H01J2235/082
摘要： A method for characterizing an electron beam in a liquid metal jet X-ray source. The method includes providing the electron beam and directing the electron beam to an interaction region; providing an electron beam dump connected to ground potential for receiving the electron beam after it has traversed the interaction region; scanning the electron beam over at least part of the interaction region; measuring X-ray radiation generated by interaction between the electron beam and the electron beam dump during the scanning to obtain an X-ray profile; and calculating an electron beam characteristic based on the X-ray profile. Also, a corresponding liquid metal jet X-ray source.
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公开(公告)号：US20230176239A1
公开(公告)日：2023-06-08
申请号：US18155314
申请日：2023-01-17
申请人： Excillum AB
发明人： Per TAKMAN , Tomi TUOHIMAA , Ulf LUNDSTRÖM
IPC分类号： G01T1/34
CPC分类号： G01T1/34
摘要： A method for characterizing an electron beam in a liquid metal jet X-ray source. The method includes providing the electron beam and directing the electron beam to an interaction region; providing an electron beam dump connected to ground potential for receiving the electron beam after it has traversed the interaction region; scanning the electron beam over at least part of the interaction region; measuring X-ray radiation generated by interaction between the electron beam and the electron beam dump during the scanning to obtain an X-ray profile; and calculating an electron beam characteristic based on the X-ray profile. Also, a corresponding liquid metal jet X-ray source.
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公开(公告)号：US2908822A
公开(公告)日：1959-10-13
申请号：US63818557
申请日：1957-02-04
申请人： LAWRENCE CRANBERG
发明人： LAWRENCE CRANBERG
IPC分类号： G01T1/34
CPC分类号： G01T1/34
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