Oliver Liebfried Gelsenkirchen University of Applied Science, Germany

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Presentation transcript:

MANGANITE SENSORS ARRAY FOR MEASUREMENTS OF MAGNETIC FIELD DISTRIBUTION Oliver Liebfried Gelsenkirchen University of Applied Science, Germany Semiconductor Physics Institute (SPI), Lithuania

Structure Manganite Sensor Array Experimental arrangement Calculation Results Conclusion Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Manganite Sensor Size of 1x0.5mm Made of La0.83Sr0.17MnO3 thin polycrystalline film Sensitive to absolute value of magn.field (B-Scalar-Sensor) Insensitive to changes of the direction of the B-vector Tested for B < 50T Source: Vilnius High Magnetic Field Centre Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Manganite Sensor Array 4 B-Scalar-Sensors in a flexible tube in distances of 5 mm fixed by customary glue coated by wire screen Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Experimental arrangement Capacity: 2240μF Testing Voltage: 1000V Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Experimental arrangement Casing Coil z Carrier tube Projectile Sensor array Stopper Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Theory - Magnetically coupled circuits - Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Calculation - Basic equation system - Voltage equations: Equation of movement:  System of ~50 differential equations Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Theory - Magnetic field - Magnetic field generated by each ring was calculated applying the following formula: r – radial position zn – axial distance to nth ring sn – radius of nth ring K,E – elliptic integrals of 1st & 2nd kind with Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

- Fixed projectile arrangement - Results - Fixed projectile arrangement - calculated measured Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Results 50 μs 250 μs 500 μs 700 μs Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Calculation - Results - Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Calculation - Results - Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Conclusion Manganite sensor available for measurement of the magnitude of high magnetic fields independent of its direction 4-sensor array was used to measure time history of axial distribution of a highly dynamic magnetic field Very good agreement of experimental and theoretical results Next step: frequency response diagrams (amplitude and phase) of the manganite sensor Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006

Thank you four your attention! Oliver Liebfried MANGANITE SENSOR ARRAY 21th Sep. 2006