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

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

3. 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 th Sep. 2006

4. 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 th Sep. 2006

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

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

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

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

9. 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 th Sep. 2006

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

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

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

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

14. 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 th Sep. 2006

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