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公开(公告)号：US20250106977A1
公开(公告)日：2025-03-27
申请号：US18730019
申请日：2022-11-08
Inventor： Hidetoshi Katori , Masao Takamoto , Shigenori Tsuji
Abstract: An atom beam generation device includes an atomic oven including a reservoir in which a sample is contained, a deceleration unit, and coil units. The deceleration unit includes a bore through which an atomic beam and a slowing laser beam pass, and decelerates an atomic beam emitted from the atomic oven by means of slowing laser beam and a magnetic field. The coil units supply Joule heat to the atomic oven, and generate a magnetic field in the deceleration unit.
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公开(公告)号：US20230216513A1
公开(公告)日：2023-07-06
申请号：US17915776
申请日：2021-03-30
Inventor： Shigenori Tsuji , Masao Takamoto , Hidetoshi Katori
Abstract: An optical lattice clock includes a clock transition space having disposed therein an atom group trapped in an optical lattice, and a triaxial magnetic field correction coil for correcting the magnetic field of the clock transition space. Additionally, in a correction space that includes the clock transition space and is larger than the clock transition space, a photoreceiver promotes the clock transition of the atom group trapped in the optical lattice and acquires a clock transition frequency distribution for the correction space. Further, a corrector corrects the magnetic field of the triaxial magnetic field correction coil on the basis of the frequency distribution measured by the photo receiver.
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公开(公告)号：US20230134841A1
公开(公告)日：2023-05-04
申请号：US17915720
申请日：2021-03-30
Inventor： Shigenori Tsuji , Masao Takamoto , Hidetoshi Katori
Abstract: There is a need to maintain or enhance the magnetic field correction accuracy of a physics package while making the physics package more compact and portable. A triaxial magnetic field correction coil provided inside a vacuum chamber surrounding a clock transition space having atoms disposed therein. The triaxial magnetic field correction coil formed into a shape such that it is possible to correct, for magnetic field components of three axial directions passing through the clock transition space, a constant term, a first order spatial derivative term, a second order spatial derivative term, a third or higher order spatial derivative term, or some given combination of these terms. The triaxial magnetic field correction coil can be used in, for example, a physics package for an optical lattice clock.
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公开(公告)号：US20240126215A1
公开(公告)日：2024-04-18
申请号：US18277353
申请日：2022-02-10
Inventor： Shigenori Tsuji , Masao Takamoto , Hidetoshi Katori
IPC: G04F5/14
CPC classification number: G04F5/14
Abstract: An atomic oven includes a cartridge and a main body. The cartridge includes a holder that accommodates an atom source; and a capillary nozzle. The main body includes: a housing in which the cartridge is installed; a button heater; an access opening for removing the cartridge from the main body and placing the cartridge into the main body, the access opening being provided on the atmosphere side, which is outside the main body; and a passage from the access opening to the housing. The cartridge is inserted into the main body through the access opening and is installed in the housing. The atom source is heated by the button heater, whereby atomic gas generated from the atom source is emitted as an atom beam to the vacuum side, which is outside the main body.
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公开(公告)号：US11894854B2
公开(公告)日：2024-02-06
申请号：US17915776
申请日：2021-03-30
Inventor： Shigenori Tsuji , Masao Takamoto , Hidetoshi Katori
Abstract: An optical lattice clock includes a clock transition space having disposed therein an atom group trapped in an optical lattice, and a triaxial magnetic field correction coil for correcting the magnetic field of the clock transition space. Additionally, in a correction space that includes the clock transition space and is larger than the clock transition space, a photoreceiver promotes the clock transition of the atom group trapped in the optical lattice and acquires a clock transition frequency distribution for the correction space. Further, a corrector corrects the magnetic field of the triaxial magnetic field correction coil on the basis of the frequency distribution measured by the photo receiver.
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Patent Agency Ranking
公开(公告)号：US20190331747A1
公开(公告)日：2019-10-31
申请号：US16392949
申请日：2019-04-24
Applicant: JEOL Ltd.
Inventor： Katsuyuki Toshima , Shigenori Tsuji , Shinji Nakamura , Fumio Hobo , Takeshi Tsukada , Akifumi Nomura
IPC: G01R33/385 , G01R33/421 , G01R1/067
Abstract: A sample pipe is provided in a sample temperature control pipe. A detection coil is provided in a low-temperature airtight chamber and configured to irradiate a sample with a high-frequency magnetic field. A room-temperature shield is provided on an outer circumferential surface of the sample temperature control pipe or on an inner circumferential surface thereof, and is configured to block irradiation of the high-frequency magnetic field from the detection coil from reaching a region other than an observation object. A low-temperature shield is provided in an airtight chamber and between the detection coil and the room-temperature shield and is configured to block irradiation of the high-frequency magnetic field from the detection coil from reaching the room-temperature shield.
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公开(公告)号：US12211647B2
公开(公告)日：2025-01-28
申请号：US17915745
申请日：2021-03-30
Inventor： Shigenori Tsuji , Masao Takamoto , Hidetoshi Katori
Abstract: A tri-axial magnetic field correction coil includes a first coil group and a second coil group with respect to an X-axis direction that passes through a clock transition space in which atoms are disposed. The first coil group is a Helmholtz-type coil composed in a point-symmetrical shape around the clock transition space. The second coil group is composed in a point-symmetrical shape around the clock transition space with respect to the X-axis direction, and is a non-Helmholtz-type coil that differs from the first coil group in terms of coil size, coil shape, or distance between coils.
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公开(公告)号：US11929754B2
公开(公告)日：2024-03-12
申请号：US17915720
申请日：2021-03-30
Inventor： Shigenori Tsuji , Masao Takamoto , Hidetoshi Katori
Abstract: There is a need to maintain or enhance the magnetic field correction accuracy of a physics package while making the physics package more compact and portable. A triaxial magnetic field correction coil is provided inside a vacuum chamber surrounding a clock transition space having atoms disposed therein. The triaxial magnetic field correction coil is formed into a shape such that it is possible to correct, for magnetic field components of three axial directions passing through the clock transition space, a constant term, a first order spatial derivative term, a second order spatial derivative term, a third or higher order spatial derivative term, or some given combination of these terms. The triaxial magnetic field correction coil can be used in, for example, a physics package for an optical lattice clock.
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公开(公告)号：US10114089B2
公开(公告)日：2018-10-30
申请号：US15403474
申请日：2017-01-11
Applicant: JEOL Ltd.
Inventor： Katsuyuki Toshima , Shinji Nakamura , Shigenori Tsuji
Abstract: A sample tube is arranged in a sample temperature adjusting pipe, and a temperature adjustment gas is supplied. A vacuum vessel is formed with the sample temperature adjusting pipe and an outer wall body, and a detection coil and the like to be placed in a cooling state are arranged in the vacuum vessel. A sealed section between the sample temperature adjusting pipe and the outer wall body is sealed by a sealing structure. The sealing structure includes a high-vacuum O-ring and a low-temperature O-ring. The high-vacuum O-ring has characteristics for sealing the sealed section in a regular temperature region. The regular temperature region is a temperature region excluding a low temperature region, and the low temperature region is a temperature region including a lower limit in a possible temperature adjustment range of the temperature adjustment gas. The low-temperature O-ring has characteristics for sealing the sealed section in the low temperature region.
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公开(公告)号：US20180024207A1
公开(公告)日：2018-01-25
申请号：US15654049
申请日：2017-07-19
Applicant: JEOL Ltd.
Inventor： Shigetoshi Oshima , Shigenori Tsuji
CPC classification number: G01R33/34007 , G01R33/34023 , G01R33/34061 , H01L39/125 , H01L39/249
Abstract: A manufacturing method includes forming a superconductive thin-film layer on a substrate and processing the superconductive thin-film layer into a shape of a detection coil for magnetic resonance measurement. Accordingly, a superconductive thin-film layer having the detection coil shape can be formed. The method further includes irradiating the shape-processed superconductive thin-film layer with ions. Accordingly, lattice defects serving as pinning can be formed in the superconductive thin-film layer.
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