公开(公告)号：US12072401B2

公开(公告)日：2024-08-27

申请号：US17537935

申请日：2021-11-30

Applicant: Bruker BioSpin GmbH

Inventor： Ion Prisecaru ,  Lukas Haenichen

IPC: G01R33/383 ,  G01R33/38 ,  G01R33/60 ,  H01F7/20

CPC classification number: G01R33/383 ,  G01R33/3806 ,  G01R33/60 ,  H01F7/202

Abstract: An electron paramagnetic resonance (EPR) spectrometer includes a magnet system comprising at least one magnet and at least one pole piece for producing a magnetic field along a pole axis in a field of view in front of the at least one pole piece. A probe head comprising a microwave resonator and at least one modulation coil or rapid scan coil produces an additional, time-varying magnetic field aligned along the pole axis. The probe head is arranged in the field of view, and a respective modulation coil or rapid scan coil is arranged between the microwave resonator and a respective pole piece. For each pole piece, at least a part of said pole piece is made of a function material having an electric conductivity σf of 104 S/m or less, and having a saturation magnetic flux density BSf of 0.2 T or more.

公开(公告)号：US11289255B2

公开(公告)日：2022-03-29

申请号：US16998187

申请日：2020-08-20

Applicant: Bruker BioSpin GmbH

Inventor： William Jefferson Stone, III ,  Lukas Haenichen

IPC: H01F7/02 ,  H01F41/02

Abstract: An adjustment apparatus for adjusting the angular tilt of a first component of a magnetic circuit relative to an alignment axis of a second component of the circuit uses at least one pair of spacers each of which has a thickness that changes continuously around its periphery. The spacers are arranged between the circuit components and, as a relative rotation between the spacers is changed, the combined thickness of the two spacers increases in one area, while decreasing in another. This results in a tilting of a top surface of the spacer pair relative to a bottom surface, and a corresponding change in a relative tilt of the first component relative to the second component. The spacers may be ring-shaped or disc-shaped, and allow for precise alignment of the magnetic circuit without the need for shims between the components.

公开(公告)号：US10976391B2

公开(公告)日：2021-04-13

申请号：US16693832

申请日：2019-11-25

Applicant: Bruker BioSpin GmbH

Inventor： Rainer Pietig ,  Volker Niemann ,  Lukas Haenichen

IPC: G01R33/383 ,  H01F7/02 ,  G01R33/387

Abstract: A magnet arrangement having a hollow-cylindrical magnet element that has an axial length Lz,M and an inner radius Rin, is constructed from magnet segments arranged concentrically around the z-axis, and has a Halbach magnetization. At least one ring-shaped magnet element has a notched, hollow-cylindrical cutout extending circumferentially around the z-axis symmetrically with respect to the plane z=0, the axial extent Lz,A of the cutout being less than the axial length Lz,M of the magnet element. The cutout has a radial depth TA and an axial length Lz,A

公开(公告)号：US10598745B2

公开(公告)日：2020-03-24

申请号：US15941134

申请日：2018-03-30

Applicant: Bruker BioSpin GmbH

Inventor： Volker Niemann ,  Rainer Pietig ,  Lukas Haenichen

IPC: G01R33/383 ,  H01F7/02 ,  G01N24/08 ,  G01R33/30 ,  G01R33/3873

Abstract: A magnet arrangement (1) having a permanent magnet system with at least two ring-shaped magnet elements (2) which are made of individual magnet segments (3), are arranged cylindrically symmetrically and stacked on one another in the z direction and/or concentrically, and arranged such that the magnetization directions of the individual segments in the rings extend parallel in an x-y plane. The magnet elements align relative to one another in the z direction and have a Halbach magnetization Before final mounting in the magnetic resonance apparatus, the magnet elements are prefabricated as solid structures and their respective magnet segments are fixed undisplaceably relative to one another. But the magnet elements are displaceable relative to one another in the x-y plane, and are mounted rotatably and/or tiltably relative to one another.

公开(公告)号：US10180473B2

公开(公告)日：2019-01-15

申请号：US15449332

申请日：2017-03-03

Applicant: Bruker BioSpin GmbH

Inventor： Lukas Haenichen ,  Rainer Pietig

IPC: G01R33/383 ,  G01R33/389

Abstract: A magnetic resonance arrangement with a permanent magnet system and having magnet elements, pole piece elements and yoke elements of magnetic material arranged cylinder-symmetrically with respect to the z axis. The yoke elements have a first lid (11′) and a second lid (11″) and also a hollow cylindrical drum (12) arranged axially between the lids. The yoke elements enclose the measuring volume in the axial and radial direction. The magnet elements each include a pair of cylinder-symmetrical axial magnets (13′, 13″) and also radial magnet rings (14′, 14″). The axial magnets are each arranged axially adjoining the lids and are arranged radially within the radial magnet rings and respectively axially further away from the measuring volume than the radial magnet rings. The outer diameter of the axial magnets is less than or equal to the inner diameter of the radial magnet rings.

公开(公告)号：US20180292481A1

公开(公告)日：2018-10-11

申请号：US15941134

申请日：2018-03-30

Applicant: Bruker BioSpin GmbH

Inventor： Volker Niemann ,  Rainer Pietig ,  Lukas Haenichen

IPC: G01R33/383 ,  H01F7/02 ,  G01R33/30 ,  G01N24/08

CPC classification number: G01R33/383 ,  G01N24/08 ,  G01R33/307 ,  G01R33/3873 ,  H01F7/0278 ,  H01F7/0284

Abstract: A magnet arrangement (1) having a permanent magnet system with at least two ring-shaped magnet elements (2) which are made of individual magnet segments (3), are arranged cylindrically symmetrically and stacked on one another in the z direction and/or concentrically, and arranged such that the magnetization directions of the individual segments in the rings extend parallel in an x-y plane. The magnet elements align relative to one another in the z direction and have a Halbach magnetization Before final mounting in the magnetic resonance apparatus, the magnet elements are prefabricated as solid structures and their respective magnet segments are fixed undisplaceably relative to one another. But the magnet elements are displaceable relative to one another in the x-y plane, and are mounted rotatably and/or tiltably relative to one another.

公开(公告)号：US20170254866A1

公开(公告)日：2017-09-07

申请号：US15449332

申请日：2017-03-03

Applicant: Bruker BioSpin GmbH

Inventor： Lukas Haenichen ,  Rainer Pietig

IPC: G01R33/383 ,  G01R33/389

CPC classification number: G01R33/383 ,  G01R33/389

Abstract: A magnetic resonance arrangement with a permanent magnet system and having magnet elements, pole piece elements and yoke elements of magnetic material arranged cylinder-symmetrically with respect to the z axis. The yoke elements have a first lid (11′) and a second lid (11″) and also a hollow cylindrical drum (12) arranged axially between the lids. The yoke elements enclose the measuring volume in the axial and radial direction. The magnet elements each include a pair of cylinder-symmetrical axial magnets (13′, 13″) and also radial magnet rings (14′, 14″). The axial magnets are each arranged axially adjoining the lids and are arranged radially within the radial magnet rings and respectively axially further away from the measuring volume than the radial magnet rings. The outer diameter of the axial magnets is less than or equal to the inner diameter of the radial magnet rings.