eberhard pulz karl-heinz jäckel, oliver bronkalla
TRANSCRIPT
![Page 1: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/1.jpg)
Eberhard PulzKarl-Heinz Jäckel, Oliver Bronkalla
![Page 2: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/2.jpg)
1. Introduction
2. Serson’s Method
3. Cs-He-Magnetometer
4. Measuring Method
5. Coil System and Switching Technique
6. Theoretical Estimations and Limits
7. Design of Coil System
8. Installation of the Instrument
9. Results
10. Conclusion
1. Introduction
2. Serson’s Method
3. Cs-He-Magnetometer
4. Measuring Method
5. Coil System and Switching Technique
6. Theoretical Estimations and Limits
7. Design of Coil System
8. Installation of the Instrument
9. Results
10. Conclusion
![Page 3: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/3.jpg)
Serson‘s Method
20
22
222
2220
222
222
2/
4
FFFA
A
FFST
TSF
ATSF
ATSF
A - additional field strengthFo - magnetic field strength without an additional fieldF+/- magnetic field strength with an additional fieldS – auxiliary quantityT – magnetic field strength at desired direction
F 0
T - A
A
T
F_
S
F+
![Page 4: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/4.jpg)
Cs-He-Magnetometer
Cs - Lamp
Cs- Sensor
Cs-He- Sensor
![Page 5: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/5.jpg)
He Conversations Formula
0236888.28
frequencyF
![Page 6: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/6.jpg)
Measuring Sequence for Each Second
180 msec
0 200 400 600 800 1000 timemsecfrequency counter in current switching
operation 180 msec
C+ E- F C- E+
True North
Bias field
Top view
![Page 7: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/7.jpg)
Measurement Arrangement
Magnetometer Electronics
Switching Unit
Current source
Frequency Counter
GPS10MHz
Clock
LINUXComputer
SensorCoils
![Page 8: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/8.jpg)
Estimation of Errors
Additional field strength for a given magnetometer noise about 0,005nT rmsand a desired noise in the components of 0,01nT rms
additional field strength of about 5000nT
Effect of tilting of the vertical axis of the bias coilfor ±1’tilting, we got for X= ±13nT
Effect of tilting the azimuth angle between the additional Field and the magnetic meridian
for ±1’tilting, we got for Y= ±5,5nT ΔX= ±3E-03
![Page 9: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/9.jpg)
![Page 10: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/10.jpg)
![Page 11: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/11.jpg)
.g
North South
MirrorLaser
PSD (20x20mm2)(Position Sensitive Diode)
Top viewTop view
E
a
mE
2tan
9
g = 1’ is about 5mm at PSD
a
Coil system
![Page 12: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/12.jpg)
![Page 13: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/13.jpg)
![Page 14: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/14.jpg)
![Page 15: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/15.jpg)
![Page 16: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/16.jpg)
s=2.1•10-2
s=8•10-3
s=1.9•10-2
![Page 17: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/17.jpg)
![Page 18: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/18.jpg)
![Page 19: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/19.jpg)
![Page 20: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/20.jpg)
![Page 21: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/21.jpg)
![Page 22: Eberhard Pulz Karl-Heinz Jäckel, Oliver Bronkalla](https://reader035.vdocuments.us/reader035/viewer/2022062309/5697bfd71a28abf838cae30c/html5/thumbnails/22.jpg)
Conclusions
Cs-He magnetometer absolute accuracy 0.1 nTsum of noise at NGK < 5 pT rms @ 180 msec
Orthogonal coil system: suspended, turnable, LASER controlled
Realtime (GPS) LINUX-controlled system
Result: 1 sec mean values for all components
Reducing the number of manually absolute measurements to some / year
Thank you for your attention