-
公开(公告)号：WO2006080104A3
公开(公告)日：2007-07-05
申请号：PCT/JP2005014142
申请日：2005-07-27
Applicant: HAMAMATSU PHOTONICS KK , NAKAMURA KIMITSUGU , OOHASHI YOUSUKE , OHISHI KEIICHI , ITO MASUO
Inventor： NAKAMURA KIMITSUGU , OOHASHI YOUSUKE , OHISHI KEIICHI , ITO MASUO
Abstract: This invention relates to an electron multiplier unit and others enabling cascade multiplication of electrons through successive emission of secondary electrons in multiple stages in response to incidence of primary electrons. The electron multiplier unit has a first support member provided with an inlet aperture for letting primary electrons in, and a second support member located so as to face the first support member. These first and second support members hold an electron multiplication section for the cascade multiplication and an anode. The electron multiplication section comprises at least a first dynode of a box type and a second dynode having a reflection type secondary electron emission surface located so as to face the first dynode and arranged to receive secondary electrons from the first dynode and to emit secondary electrons to a side where the first dynode is located. The anode is located at a position where the secondary electrons emitted from the first dynode do not directly arrive, and the second dynode alters a travel path of secondary electrons so as to be kept in a space between the first and second support members.
Abstract translation: 本发明涉及电子倍增器单元和其它能够响应于初级电子的入射而以多级连续发射二次电子的电子级联乘法。 电子倍增器单元具有第一支撑构件，该第一支撑构件设置有用于使一次电子入口的入口孔和位于第一支撑构件的第二支撑构件。 这些第一和第二支撑构件保持用于级联乘法和阳极的电子倍增部分。 电子倍增部分至少包括箱型的第一倍增极和具有反射型二次电子发射表面的第二倍增电极，所述反射型二次电子发射表面定位成面对第一倍增电极并被布置成从第一倍增电极接收二次电子并发射二次电子 第一个倍极管所在的一侧。 阳极位于从第一倍增电极发射的二次电子不直接到达的位置，并且第二倍增极改变二次电子的行进路径，以便保持在第一和第二支撑构件之间的空间中。
-
公开(公告)号：WO2006112143A2
公开(公告)日：2006-10-26
申请号：PCT/JP2006303338
申请日：2006-02-17
Applicant: HAMAMATSU PHOTONICS KK , OHMURA TAKAYUKI , KIMURA SUENORI , ITO MASUO
Inventor： OHMURA TAKAYUKI , KIMURA SUENORI , ITO MASUO
IPC: H01J43/06
CPC classification number: H01J43/06
Abstract: The present invention relates to a photomultiplier having a structure that enables to perform high gain and satisfy higher required characteristics. In the photomultiplier, an electron-multiplying unit accommodated in a sealed container comprises a focusing electrode, an accelerating electrode, a dynode unit, and an anode. Particularly, at least the accelerating electrode and dynode unit are held unitedly in a state that at least a first-stage dynode and a second-stage included in the dynode unit are opposite directly to the accelerating electrode not through a conductive material. A conventional metal disk for supporting directly dynodes which are set to the same potential as that of the first-stage dynode is not placed between the accelerating electrode and dynode unit; thus, variations of the transit time of electrons may be drastically reduced while the electrons reach from the cathode to the second-stage dynode via the first-stage dynode.
Abstract translation: 本发明涉及具有能够实现高增益并满足更高要求特性的结构的光电倍增管。 在光电倍增器中，容纳在密封容器中的电子倍增单元包括聚焦电极，加速电极，倍增电极单元和阳极。 特别地，加速电极和倍增电极单元至少保持在至少第一级倍增电极和包括在倍增极单元中的第二级不是通过导电材料与加速电极直接相对的状态。 在加速电极和倍增电极单元之间没有设置用于直接设置与第一级倍增电极相同电位的倍增电极的金属盘， 因此，电子的通过时间的变化可以大大降低，同时电子经由第一级倍增极从阴极到达第二级倍增极。
-
公开(公告)号：DE69713996D1
公开(公告)日：2002-08-22
申请号：DE69713996
申请日：1997-12-10
Applicant: HAMAMATSU PHOTONICS KK
Inventor： SUZUKI HIDEKI , KONDO MINORU , ITO MASUO , ISHIHARA YOSHITOSHI
Abstract: In an image intensifier comprising an entrance faceplate, made of a material transparent to light, having a photoelectric surface, formed on a surface opposite to a light entrance surface, for photoelectrically converting incident light into an electron; and an optical fiber block (4), constituted by a plurality of optical fibers bundled together, having a phosphor face (46) at an end face (44) of each optical fiber on the light entrance side, for emitting light in response to the electron incident thereon; the photoelectric surface of the entrance faceplate and the phosphor face of the optical fiber block opposing each other, while a vacuum atmosphere being formed therebetween; the optical fiber block is provided with a pit in which an end face (44) of a core portion (42) of each optical fiber is recessed from an end face of a cladding portion (43) thereof, the bottom of the pit is filled with a phosphor, the surface of this phosphor is provided with a metal back layer, the cladding portion projects from the surface of the phosphor toward the entrance surface by a predetermined height, and the projecting surface of the cladding portion is provided with a metal film (47).
-
公开(公告)号：DE69615958D1
公开(公告)日：2001-11-22
申请号：DE69615958
申请日：1996-07-19
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KYUSHIMA HIROYUKI , NAKAMURA KIMITSUGU , KIMURA SUENORI , OOHASHI YOUSUKE , OHMURA TAKAYUKI , ITO MASUO
Abstract: Photomultiplier tube (1) having a photocathode (5) for emitting photoelectrons to an electron multiplication portion (6). The electron multiplication portion (6) includes a first dynode (Dy1) and a second dynode (Dy2) in confrontation with the first dynode (Dy1). The second dynode (Dy2) has a secondary electron emission which is substantially saturated with respect to an electric voltage applied thereto, or which is fixed with respect to electrons that are originated from the first dynode (Dy1) and other electrons that are reflected off the first dynode (Dy1).
-
公开(公告)号：AU3958799A
公开(公告)日：1999-12-20
申请号：AU3958799
申请日：1999-06-01
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KYUSHIMA HIROYUKI , ATSUMI AKIRA , SHIMOI HIDEKI , OKADA TOMOYUKI , ITO MASUO
Abstract: With the outer wall surface (2b) of a metal-made side tube (2) of a photomultiplier (1) flush with the edge face (4b) of a stem plate (4), the side tube (2) is secured to the stem plate (4) by welding, and thereby there is no projection like a flange at the bottom of the photomultiplier (1), reducing the size of the photomultiplier (1). Therefore, though it is difficult to perform resistance welding, the outside dimensions of the photomultiplier (1) can be decreased, and multiple photomultipliers (1) can densely abut to one another in such a way that the side tubes (2) are put together even if the photomultipliers (2) are arranged when applied. Hence, high-density arrangement of photomultipliers (1) are realized by assembling metallic stem plate (4) and the side tube (2) by, for example, laser welding.
-
Patent Agency Ranking
公开(公告)号：GB2202988A
公开(公告)日：1988-10-05
申请号：GB8803298
申请日：1988-02-12
Applicant: HAMAMATSU PHOTONICS KK
Inventor： NAKAMURA KIMITSUGU , ITO MASUO
Abstract: A photomultiplier for converting an incident weak light into multiplied electrons to thereby output an electrical signal corresponding to the intensity of the incidence light. The photomultiplier comprises a photocathode for emitting primary electrons; plural dynodes for emitting secondary electrons in response to incident of the primary electrons and multiplying first secondary electrons passing between the dynodes; and shield means for preventing second secondary electrons emitted from a first dynode of the dynodes toward the photocathode from returning to the dynodes, thereby to reduce the generation of a residual pulse currents caused by the second secondary electrons and to accurately detect a main pulse current caused by the first secondary electrons.
-
公开(公告)号：DE69930923T2
公开(公告)日：2007-01-11
申请号：DE69930923
申请日：1999-02-05
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OKADA TOMOYUKI , ITO MASUO , NAKAMURA KIMITSUGU , ISHIHARA YOSHITOSHI , NAKAMURA TSUTOMU , INAZURU TUTOMU
Abstract: A hood electrode attached to a tip portion of a target is provided with an electron passage port widening on the side opposite from an x-ray emitting window, so that electrons emitted from an electron gun are made incident on the front end face of a target at a position on the x-ray emission side, whereby the distance between the x-ray generating position and the x-ray emitting window can be shortened.
-
公开(公告)号：DE69930923D1
公开(公告)日：2006-05-24
申请号：DE69930923
申请日：1999-02-05
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OKADA TOMOYUKI , ITO MASUO , NAKAMURA KIMITSUGU , ISHIHARA YOSHITOSHI , NAKAMURA TSUTOMU , INAZURU TUTOMU
Abstract: A hood electrode attached to a tip portion of a target is provided with an electron passage port widening on the side opposite from an x-ray emitting window, so that electrons emitted from an electron gun are made incident on the front end face of a target at a position on the x-ray emission side, whereby the distance between the x-ray generating position and the x-ray emitting window can be shortened.
-
公开(公告)号：AU1891399A
公开(公告)日：2000-08-07
申请号：AU1891399
申请日：1999-01-19
Applicant: HAMAMATSU PHOTONICS KK
Inventor： KIMURA SUENORI , ITO MASUO
Abstract: In this photomultiplier tube (1), light incident on a light-receiving faceplate (3) is converted into photoelectrons by a photosensitive surface (3a), and the photoelectrons strike a dynode (4) to emit many secondary electrons. The secondary electrons are then collected by a mesh-like anode (5). Since the anode (5) is disposed to be parallel to the photosensitive surface (3a), the photoelectrons emerging from the photosensitive surface (3a) can easily pass through a mesh portion (5a), and many photoelectrons can be made to strike the dynode (4). As the number of photoelectrons incident on the dynode (4) increases, the number of secondary electrons from the dynode (4) increases. This improves the gain characteristics of the photomultiplier tube (1). In addition, since the anode (5) is formed to have a flat shape conforming to the shape of the photosensitive surface (3a), the mesh-like anode (5) can be easily molded. Since a secondary electron emission surface (4a) of the dynode (4) is tilted with respect to the anode (5), photoelectrons having passed through the anode (5) obliquely strike the secondary electron emission surface (4a) of the dynode (4). As a consequence, the number of secondary electrons emitted can be increased. This also improves the gain characteristics of the photomultiplier tube (2).
-
公开(公告)号：AU2299699A
公开(公告)日：1999-08-23
申请号：AU2299699
申请日：1999-02-05
Applicant: HAMAMATSU PHOTONICS KK
Inventor： OKADA TOMOYUKI , ITO MASUO , NAKAMURA KIMITSUGU , ISHIHARA YOSHITOSHI , NAKAMURA TSUTOMU , INAZURU TUTOMU
Abstract: A hood electrode attached to a tip portion of a target is provided with an electron passage port widening on the side opposite from an x-ray emitting window, so that electrons emitted from an electron gun are made incident on the front end face of a target at a position on the x-ray emission side, whereby the distance between the x-ray generating position and the x-ray emitting window can be shortened.
-
-
-
-
-
-
-
-
-
Search Results
33
records
(took 0.019 seconds)
