公开(公告)号：US20240329169A1

公开(公告)日：2024-10-03

申请号：US18619464

申请日：2024-03-28

Applicant: Bruker BioSpin GmbH & Co. KG

Inventor： Rico SIMMLER ,  David OSEN ,  Daniel PODADERA SANCHEZ ,  Lukas BECKER

IPC: G01R33/30 ,  G01N24/08 ,  G01R33/31

CPC classification number: G01R33/307 ,  G01R33/31 ,  G01N24/08

Abstract: An NMR method and apparatus uses a magic angle spinning (MAS) system with a MAS turbine having a MAS stator and a MAS rotor. At least two different gases or gas mixtures are fed to the stator through separate gas feeds, a first for the driving of the rotor and another, which is different from the first, for the bearing of the rotor. Respective pressures of the at least two different gases or gas mixtures are regulated separately, and the different gases or gas mixtures are prevented from mixing in the stator by means of a flushing seal through which they at least partially flow out of the stator. Conventional outflow nozzles do not need to be adapted, and the rotor can be operated at a high rotational frequency even at low pressures. The pressures remain stable so that no rotational oscillations occur during the NMR measurement.

公开(公告)号：US12106897B2

公开(公告)日：2024-10-01

申请号：US17259407

申请日：2019-07-03

Applicant: Bruker BioSpin GmbH & Co. KG

Inventor： Wolfgang Frantz ,  Rafael Caminada ,  Gerald Neuberth

IPC: H01F6/02 ,  G01R33/3815 ,  H01B12/00 ,  H01F6/06

CPC classification number: H01F6/02 ,  G01R33/3815 ,  H01B12/00 ,  H01F6/06

Abstract: The invention relates to a superconducting magnet coil system comprising a first electrical mesh (M1) and a second electrical mesh (M2), which are interconnected in series with one another, wherein the first electrical mesh (M1) comprises in a first path an HTS (high temperature superconductor) coil section (A0) and, in series therewith, a first main coil section (A1) and in a second path a quench protection element (Q1), which bridges the series connection of HTS coil section (A0) and first main coil section (A1). The first main coil section (A1) comprises a conductor comprising superconducting filaments in a matrix. The second electrical mesh (M2) comprises a neighbouring main coil section (A3) comprising a conductor comprising superconducting filaments in a matrix. The neighbouring main coil section (A3) is that main coil section of an electrical mesh different from the first electrical mesh which, in a radial direction outwards, lies closest to the first main coil section (A1) of the first electrical mesh. The magnet coil system is characterized in that, in the case of a quench, the conductors of the main coil sections (A1, A3, A4) each generate a specific power input (LT/2π)2*1/ρM, wherein the specific power input of the conductor of the first main coil section (A1) of the first electrical mesh (M1) is higher than the specific power input of the conductor of the neighbouring main coil section (A3) of the second electrical mesh (M2). Consequently, using HTS superconductor material, it is possible to provide a magnet coil system with which particularly high field strengths can be generated and/or which has a small structural size.

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：US20240230812A1

公开(公告)日：2024-07-11

申请号：US18432246

申请日：2024-02-05

Applicant: Bruker BioSpin GmbH & Co. KG

Inventor： Michael MAIXNER

IPC: G01R33/565 ,  H03K5/1252

CPC classification number: G01R33/56509 ,  G01R33/56572 ,  H03K5/1252

Abstract: A circuit assembly for correction of an input signal including a useful signal and a disturbance signal comprises: a voltage-controlled circuit having at least one voltage-controlled circuit element, an input interface and an output interface, a resistor connected upstream of the voltage-controlled circuit in series with the voltage-controlled circuit, an operational amplifier having a first amplifier input, a second amplifier input and an amplifier output, and a low-pass filter connected between the input interface of the at least one voltage-controlled circuit element and the first amplifier input of the operational amplifier, wherein the output voltage from the operational amplifier is fed back to the low-resistance terminal of the circuit element in that the low-resistance terminal of the at least one voltage-controlled circuit element is electrically connected to the amplifier output of the operational amplifier and to the second amplifier input of the operational amplifier.

公开(公告)号：US11914010B2

公开(公告)日：2024-02-27

申请号：US17391157

申请日：2021-08-02

Applicant: Bruker BioSpin GmbH

Inventor： Ion Prisecaru

IPC: G01R33/345 ,  G01R33/36 ,  G01R33/60 ,  G01R33/34

CPC classification number: G01R33/345 ,  G01R33/3692 ,  G01R33/60 ,  G01R33/34069

Abstract: A coupling device is provided for coupling microwave radiation from a first microwave structure, in particular a microwave waveguide, into a second microwave structure, in particular a microwave resonant cavity, wherein the first and second microwave structures share a common wall, through an iris opening in said wall in front of which the coupling device is positioned on the side of the first microwave structure, in particular wherein the coupling device is of a basically cylindrical shape, characterized in that the coupling device comprises N electrically conducting conductor loops, with N≥3, preferably 3≤N≤20, that the conductor loops are arranged coaxially in an array along a z-axis, and that axially neighboring conductor loops are separated by a dielectric. The inventive coupling device allows for a larger coupling coefficient, and in particular allows for a larger dynamic range.

公开(公告)号：US11754600B1

公开(公告)日：2023-09-12

申请号：US18173102

申请日：2023-02-23

Applicant: Bruker BioSpin GmbH

Inventor： Michael Maixner

IPC: G01R19/32 ,  G01R19/25 ,  G01R15/04 ,  G01R1/20

CPC classification number: G01R19/32 ,  G01R1/203 ,  G01R15/04 ,  G01R19/2509

Abstract: A method for determining an electric current includes sending the electric current to be measured through a shunt arrangement that includes at least three identical resistors. The at least three identical resistors are thermally coupled to a common base plate and are electrically interconnected such that the electric current is at least partially divided such that a first local current through a first resistor is not equal to a second local current through a second resistor. The method also includes measuring, at the shunt arrangement, a first voltage and a second voltage via which the voltage dropping across a first resistor and across a second resistor are directly or indirectly determinable, and determining the electric current via the first voltage and the second voltage. A heating in the shunt arrangement generated by the electric current is at least partially taken into account in the determining the electric current.

公开(公告)号：US20220404445A1

公开(公告)日：2022-12-22

申请号：US17830669

申请日：2022-06-02

Applicant: Bruker BioSpin GmbH

Inventor： Marco STROBEL

IPC: G01R33/38 ,  G01R33/3815

Abstract: A method for autonomously cooling down a cryogen-free superconductive magnetic coil system includes: (a1) measuring the current temperature Tactual at the magnet and comparing it to a temperature target value T1target; (a2) if Tactual>T1target, actuating a vacuum pump and opening a barrier valve in a vacuum conduit that leads from the vacuum pump into a vacuum vessel containing the magnet; (b1) measuring the current pressure Pactual in the vacuum vessel and comparing it to a pressure target value P1target; (b2) if Pactual

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：US11187767B2

公开(公告)日：2021-11-30

申请号：US16790889

申请日：2020-02-14

Applicant: Bruker BioSpin GmbH

Inventor： David Osen ,  Alexander Krahn ,  Constantin Schalck

IPC: G01R33/30 ,  G01R33/31

Abstract: An MAS probehead (1) positioned in a magnet bore (2) includes a sample chamber (3) with a stator (4) for receiving a rotor and an RF coil that radiates RF pulses into and/or receives RF signals from an NMR sample (5). A temperature-control apparatus guides gas at a first variable temperature T1 into the sample chamber and through the stator during an NMR measurement, and guides a pressurized gas stream at a second variable temperature T2 around the sample chamber. The sample chamber is surrounded by an encapsulation device (6), at least in the azimuthal direction around the axis of the magnet bore and counter to the flow direction of the pressurized gas, and is oriented to provide an air gap (7′) between the sample chamber and the magnet bore. This prevents dissipation of the gas temperature to outer parts of the probehead, and yields larger NMR measurement temperature ranges.

公开(公告)号：US20200166591A1

公开(公告)日：2020-05-28

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

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