US 12,540,989 B2Granted

Use of function-specific gases in an MAS micro-gas turbine for solid state NMR

OwnerRico Simmler, David Osen +2inventors

InventorsRico Simmler, David Osen, Daniel Podadera Sanchez, Lukas Becker

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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.

Claims13

Dependent claims

A method for operating a nuclear magnetic resonance (NMR) apparatus having a magic angle spinning (MAS) system with an MAS turbine (10) comprising an MAS stator (11) for receiving an oblong MAS rotor (12), wherein separate gas feeds (13′;

13″) for bearing and for driving of the MAS rotor (12) are arranged in the MAS stator (11), wherein a gas or gas mixture (X;
Y) is fed to the MAS stator (11) through the separate gas feeds (13′;
13″), wherein a gas or gas mixture (X) is fed to the MAS stator (11) for the drive of the MAS rotor (12) through a first gas feed (13′) and is fed through a second gas feed (13″) for the bearing of the MAS rotor (12), and wherein a pressurization of the gas or gas mixture (X;
Y) is regulated separately in each case before being fed into the MAS stator (11),
characterized in
that at least two different gases or gas mixtures (X;
Y) are fed to the MAS stator (11) through the separate gas feeds (13′;
13″), wherein one of the at least two different gases or gas mixtures (X) is fed to the MAS stator (11) for the drive of the MAS rotor (12) through a first gas feed (13′), another gas or gas mixture (Y), which is different therefrom, for the bearing of the MAS rotor (12) is fed through a second gas feed (13″);
that a pressurization of the at least two different gases or gas mixtures (X;
Y) is regulated separately in each case before they are fed into the MAS stator (11);
and
that the different gases or gas mixtures (X;
Y) are prevented from mixing in the MAS stator (11) by means of a flushing seal (16) arranged in the MAS stator (11), through which the different gases or gas mixtures (X;
Y) for the drive of the MAS rotor (12) and for the bearing of the MAS rotor (12) at least partially flow out of the MAS stator (11).

11 more elements

A nuclear magnetic resonance (NMR) apparatus having a magic angle spinning (MAS) system with an MAS turbine (10) comprising:

an MAS stator (11) for receiving an oblong MAS rotor (12);
separate gas feeds (13′;
13″) for bearing and for driving of the MAS rotor (12) arranged in the MAS stator (11);
and
a gas regulating unit (14) that can be supplied with fed raw gases or raw gas mixtures (X′;
Y′) via separate gas feed lines, and wherein the gas regulating unit (14) is designed to prepare the raw gas or raw gas mixture (X′;
Y′) for the gas drive of the MAS rotor (12) and for the gas bearing of the MAS rotor (12) and to apply the corresponding respective adapted pressure thereto and to conduct it via separate gas feeds (13′;
13″) into the MAS stator (11) in order to effectuate the drive and the bearing of the MAS rotor (12) in the MAS turbine (10) separately from one another,
characterized in
that the gas regulating unit (14) can be supplied with at least two different fed raw gases or raw gas mixtures (X′;
Y′) via separate gas feed lines;
that the gas regulating unit (14) is designed to prepare the raw gases or raw gas mixtures (X′;
Y′) as gaseous media (X;
Y), which have different compositions, for the gas drive of the MAS rotor (12) and for the gas bearing of the MAS rotor (12) and to apply the corresponding respective adapted pressure thereto and to conduct them via separate gas feeds (13′;
13″) into the MAS stator (11) in order to effectuate the drive and the bearing of the MAS rotor (12) in the MAS turbine (10) separately from one another;
and
that the MAS turbine (10) comprises a flushing seal (16), which is arranged between drive nozzles (17″) and bearing nozzles (17′) as an outflow device for the drive and bearing gases (X;
Y) and is designed so that at least a part of the bearing gas (Y) is conducted through to prevent the drive gas (X) from reaching the region of an NMR coil.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/619,464Filed 28 Mar 2024
Priority: DE 10 2023 202 880.829 Mar 2023
Published: US 2024/0329169 A13 Oct 2024
Granted: 3 Feb 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G01R 33/307
Sample handling arrangements, e.g. sample cells, spinning mechanisms: specially adapted for moving the sample relative to the MR system, e.g.…
G01R 33/31
Sample handling arrangements, e.g. sample cells, spinning mechanisms: temperature control thereof
G01N 24/08
Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects: by using…
G01R
Measuring electric variables