DE1813205A1 - Device to avoid susceptibility inhomogeneities in the area of a sample - Google Patents
Device to avoid susceptibility inhomogeneities in the area of a sampleInfo
- Publication number
- DE1813205A1 DE1813205A1 DE19681813205 DE1813205A DE1813205A1 DE 1813205 A1 DE1813205 A1 DE 1813205A1 DE 19681813205 DE19681813205 DE 19681813205 DE 1813205 A DE1813205 A DE 1813205A DE 1813205 A1 DE1813205 A1 DE 1813205A1
- Authority
- DE
- Germany
- Prior art keywords
- sample
- coil
- area
- inhomogeneities
- turns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
- G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/30—Sample handling arrangements, e.g. sample cells, spinning mechanisms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34046—Volume type coils, e.g. bird-cage coils; Quadrature bird-cage coils; Circularly polarised coils
- G01R33/34053—Solenoid coils; Toroidal coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34092—RF coils specially adapted for NMR spectrometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/383—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using permanent magnets
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Electromagnetism (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
In der hochauflösenden Kernreconanz-Spektroskopie werdenIn high-resolution nuclear reconciliation spectroscopy
—R—R
LIagnetfeider von einer Homogenität von 10 über ein Volumen von einigen Zehntel cn benötigt. Von ausschlaggebender Bedeutung ist, daß das von Hagnetcn, der ein honogenes Ilagnetfeld erzeugt, und den erforderlichen Gradicntenspulen erzeugte PeId nicht durch die in Probenkopf angeordneten Teile gestört wird,. Dazu ist z. B. eine sorgfältige Auswahl des in Probenkopf verwendeten Materials im Hinblick auf seine magnetische Suszeptibilität notwendig. Bei Anwendung der in der Hochaufladung üblichen Probenrotation bleiben die peldgradienten in dichtung der Drehachse von besonderer Bedeutung, während Störungen der Feldgradientcnkomponenten in der kbc-ne senkrecht zur Drehachse herausgenittelt werden. Un die 7/irkungcn des Materials in nächster liähe der Probe zu diesen Feldgradienten εο klein wie nöglich zu halten, ist es notwendig, in Richtung der Drehachse Änderungen des LIaterials zu verneiden.Magnet fields of a homogeneity of 10 over a volume needed by a few tenths of a cn. It is of decisive importance that Hagnetcn's, which is a homogeneous Ilagnetfeld generated, and generated the required Gradicntenspulen PeId is not disturbed by the parts arranged in the probe head. For this purpose z. B. careful selection of the material used in the probe head in view of its magnetic susceptibility. When using the the usual sample rotation in high charging remains the Field gradients in the seal of the axis of rotation are of particular importance, while disturbances of the field gradient components in the kbc-ne can be centered perpendicular to the axis of rotation. And the effects of the material in the immediate vicinity of the sample to keep these field gradients εο small as possible, it is necessary to avoid changes to the material in the direction of the axis of rotation.
Bei einer Einspulenanordnung bedeutet eine besonders schwerwiegende L'aterialinhomogenität in Richtung der Drehachse die für den Nachweis des Kernr.agnetisr.us notwendige Hochfrequenzspule, die, un einen guten Püllfaktor zu erzielen, die Probe möglichst nahe umschließen muß, und die, un hohe Spulengüte zu erhalten, aus einigen Windungen nicht zu dünnen Kupferdrahtes besteht. Auch bei Verwendung von extren reinen eisenfreien Kupferdraht bleiben gerade in.nächster Nähe der Probe Suszeptibilitätsdifferenzen zwischen der Hochfrequenzspule und der sie umgebenden Luft oder zwischenIn the case of a single-coil arrangement, a particularly serious one means L'material inhomogeneity in the direction of the axis of rotation the high-frequency coil necessary for the detection of the Kernr.agnetisr.us, which, in order to achieve a good flushing factor, must enclose the sample as closely as possible, and which, in order to achieve a high level To obtain coil quality, consists of a few turns of copper wire that is not too thin. Even when using extremes pure iron-free copper wire just stay in close proximity to the sample susceptibility differences between the RF coil and the air surrounding it or between
PA 9/522/59, Gl/BzPA 9/522/59, Gl / Bz
09824/1IO309824 / 1IO3
der Hochfrequenzspule und den diamagnetischen Uaterial, auf das die Hochfrequenzspule aus Gründen mechanischer Stabilität aufgewunden ist, bestehen.the high frequency coil and the diamagnetic Umaterial, on the the high frequency coil for reasons of mechanical Stability is wound up, exist.
Die Erfindung löst diese an die Llaterialhonogenitat gestellte Aufgabe. Sie sieht eine Einrichtung zur Vermeidung von Suszcptibilitäteinhonogenitäten in Bereich einer auf Kernnagneticnus zu untersuchenden Probe, die von einen ein hochfrequentes Ilagnetfeld in der Probe erzeugenden Spulenkörper umgeben ist, vor. Sie ist dadurch gekennzeichnet, daß die Anzahl der Windungen an beiden ITndcn des von elektrischen Strom durchflossenen Teiles des Spulenkörpers parallel zur Achsenrichtung in den Spulenkörper verlängernder V/eise erhöht ist. In einer Weiterbildung der Erfindung können die toten Windungen des Spulenkörper s, d. h..die '("'indungen außerhalb des strondurchflossenen Teiles, zur Vermeidung der Erzeugung von störenden vYirbelstrcmen parallel zur Achsenrichtung schlitzbar sein.The invention solves this problem of material homogeneity Task. She sees a device for avoiding susceptibility inhonogeneities in the area of a on nuclear magnetic specimen to be examined, which is from a a high-frequency Ilagnetfeld is surrounded in the sample generating coil form, before. It is characterized by that the number of turns on both ITndcn of the part of the through which electrical current flows Coil body parallel to the axial direction in the coil body extending V / iron is increased. In a further education of the invention, the dead turns of the bobbin s, d. h..the '("' indungen outside the current-carrying Part can be slit parallel to the axis direction to avoid the generation of disruptive vortex currents be.
Die Erfindung wird anhand eines Ausführungsbeispiels mittels der Pigur im folgenden näher erläutert.The invention is explained in more detail below on the basis of an exemplary embodiment by means of the Pigur.
Zwischen den beiden Folschuhcn P 1 und P 2, z. B. eines Permanentnag2ieten, ist eine Einrichtung 3 für die Ilessung des Magnetfeldes, welches von Elektroncncpins und/oder Kernspins einer Probe erzeugt wird, angeordnet. Die zur Erstellung einer Homogenität des homogenen I.Iagnetfeldes zwischen den Polschuhen P 1 und P 2 notwendigen Peldgradicntenspulcn sind nicht eingezeichnet. Sichtbar ist ein Probenröhrchen R 1, z. 3. aus Quarzglas, in welchem sich eine Flüssigkeit F befindet. Dieses Röhrchen R 1 kann mittels einer nicht näher dargestellten Vorrichtung un die Drehachse G rotiert werden. Um einen kleinen Bereich (ca. einige Zehntel cn"') der Flüssigkeit F in Probenröhrchen R 1 ist eine Hochfrequenzspule II? mit drei Windungen undBetween the two Folschuhcn P 1 and P 2, z. B. permanent riveting, a device 3 for the measurement of the magnetic field, which is generated by electron pins and / or nuclear spins of a sample, is arranged. The field gradient coils necessary for creating a homogeneity of the homogeneous magnetic field between the pole pieces P 1 and P 2 are not shown. A sample tube R 1 is visible, e.g. 3. Made of quartz glass, in which a liquid F is located. This tube R 1 can be rotated un the axis of rotation G by means of a device not shown in detail. Around a small area (about a few tenths cn "') of the liquid F in the sample tube R 1 is a high-frequency coil II? With three turns and
^ 9/522/59 OO9824/1103 BAD0RiöJN^" ^ 9/522/59 OO9824 / 1103 BAD0RiöJN ^ "
den Anschlüssen Λ 1 und Λ 2 für die hochfrequente Stromzuführung angeordnet. Diese Hochfrequenzspule KP kann aus Gründen der mechanischen Stabilität selbst auf ein weiteres Quarzglaeröhrchen R 2 aufgewunden sein. Der Spulenklrpc-r, d. h. die drei ".'.'indungen der Hochfrequenzspule H?, ist in Richtung der Drehachse C an "beiden Und en des Spulenkürpers selbst un einige Windungen verlängert. Diese zusätzlichen ''«'indungen, nie aus der. gleichen eisenfreien Kupferdroht wie die Hochfrequenzspule II? bestehen, dienen dazu, da5 irgendwelche Suszeptibiiitlltsdifferenzen, die bein Übergang der !'afnetfeldlinien von den Windungen zu den sie urgebcnden Ilaterial, hier z. 3. Quarzglas des r.chrchens ?. 2, sich ergeben, aus den Bereich des ne2v;irkcanen Probcnvolunens der Flüssigkeit 7 herausgeschoben werden.the connections Λ 1 and Λ 2 for the high-frequency power supply. This high-frequency coil KP can itself be wound onto another quartz glass tube R 2 for reasons of mechanical stability. The coil body, that is to say the three "." These additional '''' indications, never from the. same iron-free copper threat as the high-frequency coil II? exist, serve to prevent any susceptibility differences that occur at the transition of the surface field lines from the windings to the original material, here e.g. 3. Quartz glass of the little church?. 2, result, are pushed out of the area of the neural sample volume of the liquid 7 .
Beim lurchfluß von hochfrequenten Strom durch die Hochfrequenzspule HF bzv.·. durch den Cpulenkürper S, können in den toten, Windungen, d. h. ucr. nicht von 5trcr. dur ·Ιι-flosscncn Windungen des CpulcnLCrpcrs ^, 'VirbelstrUnc induziert werden. Diese V."ir"belstri.'ne wurden ein zusätzliches und stl'renäes- Magnetfeld erzeugen. Zur Verneidung dieser Störungen sind diece toten Windungen lungs der Drehachsenrichtung G sehlitzbar.When high-frequency current flows through the high-frequency coil HF or ·. through the Cpulenkürper S, can in the dead, coils, d. H. ucr. not from 5trcr. dur · Ιι-flosscncn Convolutions of the CpulcnLCrpcrs ^, 'VirbelstrUnc be induced. These V. "ir" belstri.'ne became an additional one and generate stl'renäes magnetic field. To avoid it of these faults, the dead turns in the direction of the axis of rotation G can be seated.
2 Patentansprüche 1 Figur2 claims 1 figure
ΡΛ9/52Ϊ/59'ν■-■ 009824/1103ΡΛ9 / 52Ϊ / 59'ν ■ - ■ 009824/1103
Claims (2)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681813205 DE1813205B2 (en) | 1968-12-06 | 1968-12-06 | High frequency coil for induction of nucleus or electron resonance |
NL6917943A NL6917943A (en) | 1968-12-06 | 1969-11-28 | |
LU59945D LU59945A1 (en) | 1968-12-06 | 1969-12-04 | |
BE742715D BE742715A (en) | 1968-12-06 | 1969-12-05 | |
FR6942126A FR2025546A1 (en) | 1968-12-06 | 1969-12-05 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681813205 DE1813205B2 (en) | 1968-12-06 | 1968-12-06 | High frequency coil for induction of nucleus or electron resonance |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1813205A1 true DE1813205A1 (en) | 1970-06-11 |
DE1813205B2 DE1813205B2 (en) | 1971-02-04 |
Family
ID=5715511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19681813205 Pending DE1813205B2 (en) | 1968-12-06 | 1968-12-06 | High frequency coil for induction of nucleus or electron resonance |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE742715A (en) |
DE (1) | DE1813205B2 (en) |
FR (1) | FR2025546A1 (en) |
LU (1) | LU59945A1 (en) |
NL (1) | NL6917943A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0738897A1 (en) * | 1995-03-25 | 1996-10-23 | Spectrospin AG | HF reception coils device for NMR spectrometer |
US5581186A (en) * | 1994-03-11 | 1996-12-03 | Bruker Analytische Messtechnik Gmbh | Bird cage resonator for high resolution nuclear magnetic resonance |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI73320C (en) * | 1984-01-20 | 1987-09-10 | Instrumentarium Oy | NMR SPOLARRANGEMANG. |
DE4018657A1 (en) * | 1990-06-11 | 1991-12-12 | Bruker Analytische Messtechnik | SAMPLE HEAD FOR NUCLEAR RESONANCE SPECTROMETER |
-
1968
- 1968-12-06 DE DE19681813205 patent/DE1813205B2/en active Pending
-
1969
- 1969-11-28 NL NL6917943A patent/NL6917943A/xx unknown
- 1969-12-04 LU LU59945D patent/LU59945A1/xx unknown
- 1969-12-05 BE BE742715D patent/BE742715A/xx unknown
- 1969-12-05 FR FR6942126A patent/FR2025546A1/fr not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5581186A (en) * | 1994-03-11 | 1996-12-03 | Bruker Analytische Messtechnik Gmbh | Bird cage resonator for high resolution nuclear magnetic resonance |
EP0738897A1 (en) * | 1995-03-25 | 1996-10-23 | Spectrospin AG | HF reception coils device for NMR spectrometer |
US5689187A (en) * | 1995-03-25 | 1997-11-18 | Spectrospin Ag | RF receiver coil configuration for an NMR spectrometer |
Also Published As
Publication number | Publication date |
---|---|
DE1813205B2 (en) | 1971-02-04 |
NL6917943A (en) | 1970-06-09 |
LU59945A1 (en) | 1970-02-04 |
FR2025546A1 (en) | 1970-09-11 |
BE742715A (en) | 1970-06-05 |
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