GB1285694A - Flux stabilized magnets - Google Patents
Flux stabilized magnetsInfo
- Publication number
- GB1285694A GB1285694A GB4292868A GB4292868A GB1285694A GB 1285694 A GB1285694 A GB 1285694A GB 4292868 A GB4292868 A GB 4292868A GB 4292868 A GB4292868 A GB 4292868A GB 1285694 A GB1285694 A GB 1285694A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- windings
- auxiliary
- main
- fraction
- 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.)
- Expired
Links
- 230000004907 flux Effects 0.000 title abstract 2
- 238000004804 winding Methods 0.000 abstract 11
- 230000006641 stabilisation Effects 0.000 abstract 2
- 238000011105 stabilization Methods 0.000 abstract 2
- 238000005481 NMR spectroscopy Methods 0.000 abstract 1
- 230000000295 complement effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000000087 stabilizing effect Effects 0.000 abstract 1
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
- G01R33/389—Field stabilisation, e.g. by field measurements and control means or indirectly by current stabilisation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F7/00—Regulating magnetic variables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
1285694 Automatic control of magnetic fields PERKIN-ELMER Ltd 25 Nov 1969 [10 Sept 1968] 42928/68 Heading G3R [Also in Division G1] A magnet system, for example that used in a nuclear magnetic resonance spectrometer, is stabilized against short-term flux disturbances by the provision of a pick-up coil 4A, 4B, a main bucking-out winding 5A, 5B and an auxiliary bucking-out winding 6A, 6B arranged as shown in Fig.1, the signal generated by the coil 4A, 4B being applied to a high-gain amplifier 7 whose output is fed to the windings 5A, 5B, 6A, 6B in such a manner that the auxiliary winding receives a fraction of the energization supplied to the main winding to complement the stabilizing action thereof. This fraction is determined by the setting of a variable resistor 10 which may shunt the winding 6A, 6B if a series connection of the two windings replaces the parallel one shown. The spacing of the two windings is chosen so that the main winding provides a major part of the stabilization and the auxiliary winding retains its operational identity. Construction and arrangement of the windings is discussed together with the design values of the circuit components 7, 8, 9, 10. If the system is used in a N.M.R. spectrometer, the effectiveness of stabilization corresponding to the setting of the variable resistor 10 may be tested by introducing a deliberate magnetic disturbance around the system and measuring the shift in the position at which a given resonance line is observed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4292868A GB1285694A (en) | 1968-09-10 | 1968-09-10 | Flux stabilized magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4292868A GB1285694A (en) | 1968-09-10 | 1968-09-10 | Flux stabilized magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1285694A true GB1285694A (en) | 1972-08-16 |
Family
ID=10426586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4292868A Expired GB1285694A (en) | 1968-09-10 | 1968-09-10 | Flux stabilized magnets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1285694A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0138270A3 (en) * | 1983-10-14 | 1985-06-12 | Koninkl Philips Electronics Nv | Nuclear magnetic resonance apparatus |
| EP0144171A1 (en) * | 1983-11-11 | 1985-06-12 | Oxford Advanced Technology Limited | Magnet assembly |
| EP0254416A1 (en) * | 1986-06-26 | 1988-01-27 | Btg International Limited | Electrical coils |
| USRE36782E (en) * | 1983-11-11 | 2000-07-18 | Oxford Medical Limited | Magnet assembly for use in NMR apparatus |
| GB2366005A (en) * | 2000-03-10 | 2002-02-27 | Onix Process Analysis Ltd | Apparatus and method for controlling a magnet |
| GB2411741A (en) * | 2004-03-03 | 2005-09-07 | Ims Nanofabrication Gmbh | Compensation of magnetic fields |
| US9692391B2 (en) | 2013-08-06 | 2017-06-27 | Linear Research Associates, Inc. | Adjustable compensation ratio feedback system |
-
1968
- 1968-09-10 GB GB4292868A patent/GB1285694A/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0138270A3 (en) * | 1983-10-14 | 1985-06-12 | Koninkl Philips Electronics Nv | Nuclear magnetic resonance apparatus |
| EP0144171A1 (en) * | 1983-11-11 | 1985-06-12 | Oxford Advanced Technology Limited | Magnet assembly |
| USRE36782E (en) * | 1983-11-11 | 2000-07-18 | Oxford Medical Limited | Magnet assembly for use in NMR apparatus |
| EP0254416A1 (en) * | 1986-06-26 | 1988-01-27 | Btg International Limited | Electrical coils |
| GB2366005A (en) * | 2000-03-10 | 2002-02-27 | Onix Process Analysis Ltd | Apparatus and method for controlling a magnet |
| GB2366005B (en) * | 2000-03-10 | 2004-02-18 | Onix Process Analysis Ltd | Apparatus and method for controlling a magnet |
| GB2411741A (en) * | 2004-03-03 | 2005-09-07 | Ims Nanofabrication Gmbh | Compensation of magnetic fields |
| GB2411741B (en) * | 2004-03-03 | 2008-06-11 | Ims Nanofabrication Gmbh | Compensation of magnetic fields |
| US9692391B2 (en) | 2013-08-06 | 2017-06-27 | Linear Research Associates, Inc. | Adjustable compensation ratio feedback system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |