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公开(公告)号：US5194737A
公开(公告)日：1993-03-16
申请号：US773002
申请日：1991-10-08
Applicant: Duncan W. MacArthur , Krag S. Allander
Inventor： Duncan W. MacArthur , Krag S. Allander
CPC classification number: G01T1/18 , H01J47/026
Abstract: Alpha particle detectors capable of detecting alpha radiation from distant sources. In one embodiment, a voltage is generated in a single electrically conductive grid while a fan draws air containing air molecules ionized by alpha particles through an air passage and across the conductive grid. The current in the conductive grid can be detected and used for measurement or alarm. Another embodiment builds on this concept and provides an additional grid so that air ions of both polarities can be detected. The detector can be used in many applications, such as for pipe or duct, tank, or soil sample monitoring.
Abstract translation: 能够检测远距离源的α辐射的α粒子检测器。 在一个实施例中，在单个导电栅格中产生电压，而风扇抽吸含有由α粒子离子化的空气分子的空气通过空气通道并穿过导电栅格。 导电电网中的电流可以被检测并用于测量或报警。 另一实施例基于该概念，并且提供附加的格栅，使得可以检测两极性的空气离子。 检测器可用于许多应用，例如用于管道或管道，罐或土壤样品监测。
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12.发明授权Electret ionization chamber for monitoring radium and dissolved radon in water 失效用于监测水中镭和溶解氡的驻极体电离室
公开(公告)号：US5055674A
公开(公告)日：1991-10-08
申请号：US386778
申请日：1989-07-31
Applicant: Payasada Kotrappa
Inventor： Payasada Kotrappa
CPC classification number: H01J47/026 , G01T1/185 , Y10S250/02
Abstract: An electret ion chamber based radon monitor is employed as a method of measuring radium-226 and dissolved radon-222 concentrations in water. The procedure consists of taking a known volume of water and placing it in a container of known volume and determining the equilibrium radon concentration in the air phase above the water using an electret ion chamber radon. The radon concentration in the original water sample is calculated from the radon concentration of the air phase. A detailed theory is proposed and experimental results reported. Given a 200 ml water sample, it is typically possible to measure radon concentration of 160 pCi/l with an accuracy of 10% in a one day measurement. One pCi/l of Ra-226 can be also determined with an accuracy of 10% over a 10 day period.
Abstract translation: 采用基于驻极体离子室的氡监测器作为测量镭-226和溶解氡-222浓度的方法。 该程序包括取已知体积的水并将其置于已知体积的容器中，并使用驻极体离子室氡确定水上方空气相中的平衡氡浓度。 原水样品中的氡浓度由空气相的氡浓度计算。 提出了详细的理论和实验结果。 给出200毫升水样，通常可以在一天的测量中以10％的精度测量160 pCi / l的氡浓度。 也可以在10天内确定10％的精度的一个pCi / l的Ra-226。
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公开(公告)号：US4853536A
公开(公告)日：1989-08-01
申请号：US936240
申请日：1986-12-01
Applicant: John C. Dempsey , Payasada Kotrappa
Inventor： John C. Dempsey , Payasada Kotrappa
CPC classification number: H01J47/026 , G01T1/185 , Y10S250/02
Abstract: A small enclosed chamber with an electrostatically charged electret attached to the inner chamber wall. A filtered hole in the chamber permits radon or other radioactive gas to enter by diffusion. Positive or negative ions (depending on the polarity of the electret charge) formed in the chamber air by the decay of the radioactive gas move to and collect on the electret surface by virtue of its electrostatic attraction to ions of opposite polarity. These ions accumulate and cause a measurable reduction in the surface voltage of the electret which reduction is proportional to the time integrated concentration of the radioactive gas in the chamber. The electret surface voltage of the reduction value is used to calculate the average concentration of the radioactive gas during the exposure period. The electret thickness and chamber volume can both be increased to increase the sensitivity of the invention to radioactive gases such as radon, tritium or carbon-14 dioxide or such other radioactive gases.
Abstract translation: 一个带有静电荷的驻极体的小封闭腔室，连接到内腔壁。 腔室中的过滤孔允许氡气或其他放射性气体通过扩散进入。 通过放射性气体的衰减在腔室空气中形成的正离子（或负极离子（取决于驻极体电荷的极性））由于其对相反极性的离子的静电吸引而移动并收集在驻极体表面上。 这些离子累积并导致驻极体的表面电压的可测量的降低，其减小与室中的放射性气体的时间积分浓度成比例。 减少值的驻极体表面电压用于计算曝光期间放射性气体的平均浓度。 两者都可以增加驻极体厚度和室体积，以增加本发明对放射性气体如氡，氚或二氧化碳或其他放射性气体的敏感性。
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14.发明授权Gas chromatography with means to flow ionization particles into the ionization chamber 失效气相色谱法，用于将电离粒子流入电离室
公开(公告)号：US3134898A
公开(公告)日：1964-05-26
申请号：US3890760
申请日：1960-06-27
Applicant: BECKMAN INSTRUMENTS INC
Inventor： BURNELL MAURICE R , FOSTER RICHARD A , GALLAWAY WILLIAM S
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公开(公告)号：US12013500B2
公开(公告)日：2024-06-18
申请号：US16973418
申请日：2019-10-24
Applicant: FTLAB CO., LTD.
Inventor： Jae Jun Ko , Young Gweon Kim
CPC classification number: G01T1/185 , G01T1/178 , G01T1/24 , H01J47/026
Abstract: An apparatus for measuring radon and thoron using an ionization chamber is proposed. The apparatus includes: a pump for air inflow suctioning and sending external air to at least one channel; a first sensor module outputting an alpha particle detection signal of an electrical signal by detecting alpha (α) particles discharged from radon and thoron; an air inflow delay module delaying air for a predetermined delay time and then outputting the air; a second sensor module outputting an alpha particle detection signal of an electrical signal by detecting alpha (α) particles discharged from radon and thoron; and a control module discriminating normal or abnormal alpha particle detection signals, counting the normal alpha particle detection signals discriminated for a predetermined measurement time, and calculating radioactive ray concentration values on the basis of the counted number of times of the normal alpha particle detection signals.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20180254597A1
公开(公告)日：2018-09-06
申请号：US15902454
申请日：2018-02-22
Applicant: ASML Netherlands B.V.
Inventor： Sietse Thijmen VAN DER POST , Sander Bas ROOBOL , Pavel EVTUSHENKO
IPC: H01S3/0959 , H01S3/00 , G03F7/20 , H01L21/263 , H01S3/109 , H01J47/02 , H01S3/0971
CPC classification number: H01S3/0959 , G03F7/70033 , G03F7/70641 , G03F7/70683 , H01J47/026 , H01L21/2636 , H01S3/0085 , H01S3/0092 , H01S3/09716 , H01S3/1095 , H05G2/003 , H05G2/008
Abstract: A radiation source arrangement causes interaction between pump radiation (340) and a gaseous medium (406) to generate EUV or soft x-ray radiation by higher harmonic generation (HHG). The operating condition of the radiation source arrangement is monitored by detecting (420/430) third radiation (422) resulting from an interaction between condition sensing radiation and the medium. The condition sensing radiation (740) may be the same as the first radiation or it may be separately applied. The third radiation may be for example a portion of the condition sensing radiation that is reflected or scattered by a vacuum-gas boundary, or it may be lower harmonics of the HHG process, or fluorescence, or scattered. The sensor may include one or more image detectors so that spatial distribution of intensity and/or the angular distribution of the third radiation may be analyzed. Feedback control based on the determined operating condition stabilizes operation of the HHG source.
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17.发明申请Device for Measuring Absorbed Dose in an Ionizing Radiation Field and Use of the Device 审中-公开用于在电离辐射场测量吸收剂量的装置和装置的使用公开(公告)号：US20090289181A1
公开(公告)日：2009-11-26
申请号：US12227948
申请日：2007-06-04
Applicant: Göran Wickman
Inventor： Göran Wickman
CPC classification number: H01J47/026 , A61N5/1048 , G01T1/02 , G01T1/185
Abstract: The present invention concerns an arrangement for the measurement of absorbed dose at a given distance from a radioactive source. The arrangement comprises a detector body (1) of ionization chamber type, comprising two electrode elements (5, 6) arranged at a distance from each other and a measuring chamber (7) arranged between these, containing a medium that constitutes a volume that responds to radiation, a second chamber (12) arranged at a distance from the measuring chamber (7) comprising means for recording changes in the medium, a flow passage (13) that is arranged to pass through one of the electrode elements (5, 6) and to constitute a connection that allows the flow of fluid between the measuring chamber (7) and the second chamber (12), and where the detector body (1) comprises a through bore, an aperture (2), in which the radiation source is arranged during measurement or through which the radiation source is displaced during measurement. The invention concerns also the use of the arrangement.
Abstract translation: 本发明涉及一种用于测量距离放射源的给定距离处的吸收剂量的布置。 该装置包括电离室型的检测器主体（1），包括彼此间隔设置的两个电极元件（5,6）和布置在它们之间的测量室（7），其包含构成响应的体积的介质 布置成距离测量室（7）一定距离的第二室（12）包括用于记录介质中的变化的装置，流道（13），其布置成穿过电极元件（5,6）中的一个 ），并且构成允许测量室（7）和第二室（12）之间的流体流动的连接，并且其中检测器主体（1）包括通孔，孔（2），其中辐射 源在测量期间被布置，或者在测量期间放射源被置换。 本发明还涉及该装置的用途。
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18.发明授权Inonization chamber, measuring sequence for the activity of a gas emitting radiation &bgr; and method using same 有权Inonization室，气体发射辐射β的活性的测量顺序和使用它的方法公开(公告)号：US06734433B1
公开(公告)日：2004-05-11
申请号：US09958041
申请日：2001-10-03
Applicant: Gilles Meunier , Christian Le Serrec , Franck Bachelet
Inventor： Gilles Meunier , Christian Le Serrec , Franck Bachelet
IPC: H01J4702
CPC classification number: H01J47/026
Abstract: The present invention concerns an ionization chamber cylindrical in shape comprising an anode (35) formed by a central rod in current-carrying material and a cathode (38) in current-carrying material around the said anode, both connected to two elements of a mechanical base of the said chamber in which two cylindrical end shields (36, 37) in non-magnetic and insulating material are centred on the anode (35) and arranged at right angles to this at both ends, the cathode (38) being made up of a spooled wire on the outer rim of these two end shields (36, 37).
Abstract translation: 本发明涉及一种圆柱形的电离室，包括由载流材料中的中心杆形成的阳极（35）和围绕所述阳极的载流材料中的阴极（38），两者均连接到机械 所述室的底部，其中非磁性和绝缘材料中的两个圆柱形端盖（36,37）在阳极（35）上居中并且在两端成直角布置，阴极（38）构成 在这两个端盖（36,37）的外边缘上的绕线线。
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公开(公告)号：US5184019A
公开(公告)日：1993-02-02
申请号：US709566
申请日：1991-06-03
Applicant: Duncan W. MacArthur , Michael A. Wolf , James L. McAtee , Wesley P. Unruh , Alfred L. Cucchiara , Roger L. Huchton
Inventor： Duncan W. MacArthur , Michael A. Wolf , James L. McAtee , Wesley P. Unruh , Alfred L. Cucchiara , Roger L. Huchton
CPC classification number: G01T1/178 , G01T1/18 , G01T7/06 , H01J47/026
Abstract: An alpha particle detector capable of detecting alpha radiation from distant sources. In one embodiment, a high voltage is generated in a first electrically conductive mesh while a fan draws air containing air molecules ionized by alpha particles through an air passage and across a second electrically conductive mesh. The current in the second electrically conductive mesh can be detected and used for measurement or alarm. The detector can be used for area, personnel and equipment monitoring.
Abstract translation: 能够检测远距离源的α辐射的α粒子检测器。 在一个实施例中，在第一导电网中产生高电压，而风扇抽吸含有由α粒子离子化的空气分子的空气通过空气通道并穿过第二导电网。 第二导电网中的电流可被检测并用于测量或报警。 检测器可用于区域，人员和设备的监控。
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公开(公告)号：US5008540A
公开(公告)日：1991-04-16
申请号：US387497
申请日：1989-07-31
Applicant: John C. Dempsey
Inventor： John C. Dempsey
CPC classification number: G01T1/185 , H01J47/026
Abstract: A small enclosed ion chamber with an electrostatically charged electret attached to the inner chamber wall. Positive or negative ions (depending on the polarity of the electret charge) formed in the chamber air by the passing of gamma radiation or X-rays move to and collect on the electret surface by virtue of its electrostatic attraction to ions of opposite polarity. These ions neutralize the ions of opposite polarity on the electret and cause a measurable reduction in its surface voltage which reduction is proportional to the dose of gamma and/or X-ray incidence on the chamber. The reduction of the electret surface voltage is used to calculate the dose of gamma or X-ray radiation incident upon the chamber during a known exposure period. In the preferred embodiment, filtered holes in the chamber permit radon to diffuse out of the ion chamber. A sealed outer container containing an absorbent such as activated charcoal surrounds the inner ion chamber to remove any radon captured within the container and to prevent any ambient radon from entering the ion chamber. Removal of this radon removes its undesirable contribution to the gamma/X-ray dose signal and thereby enhances the accuracy of the monitor.
Abstract translation: 一个带有静电荷驻极体的小型封闭式离子室，附着在内腔壁上。 通过伽马辐射或X射线通过在腔室空气中形成的正离子（或取决于驻极体电荷的极性）通过静电对相反极性的离子的吸引而移动并收集在驻极体表面上。 这些离子中和驻极体上相反极性的离子，并导致其表面电压的可测量的降低，该减小与室上的γ和/或X射线入射剂量成比例。 驻极体表面电压的降低用于计算在已知曝光期间入射到腔室上的伽马或X射线辐射的剂量。 在优选实施例中，腔室中的过滤孔允许氡扩散离开离子室。 容纳诸如活性炭的吸收剂的密封外容器围绕内离子室以去除捕获在容器内的任何氡并防止任何环境氡进入离子室。 去除这种氡消除了对伽马/ X射线剂量信号的不利影响，从而提高了监视器的精度。
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