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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
First Experiments with Galvanomagnetic Instrumentation on the Tore Supra
and the JET Fusion Facilities
I.Bolshakova1, V.Coccorese2, I.Duran3, S.Gerasimov4, R.Holyaka1, P.Moreau5, A. Murari6, F. Saint-Laurent5, J. Stockel3
1. Magnetic Sensor Laboratory (LPNU); 1 Kotliarevsky Str, Lviv, 79013, UKRAINE2. .Association EURATOM-ENEA(CREATE), Via Claudio 21, I-80125 Napoli, ITALY3. IPP Prague, Association EURATOM/IPP.CR, Za Slovankou 3, 182 00 Praha 8, CZECH REPUBLIC4. Euratom/UKAEA Association, Fusion Culham Science Centre, Abingdon, OX14 3EA, UK5. Association EURATOM-CEA, Cadarache, 13108 Saint Paul Lez Durance, FRANCE 6.Consorzio RFX, Associazione ENEA-EURATOM per la Fusione, Corso Stati Uniti 4, 37125 Padova, ITALY
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
Contents
Abbreviated notations:
GI – Galvanomagnetic InstrumentationHT – Hall TransducerIMT – Integrated Magnetic Transducer
1. Statement of the problem 2. Galvanomagnetic Instrumentation: requirements & solutions3. Integrated Magnetic Transducer & Intelligent Functions4. Experiments with GI on TORE SUPRA, Cadarache (France)5. Experiments with GI on JET, Culham (UK)6. GI electronics & parameters7. New High Frequency Magnetic Transducer8. Next steps9. Conclusion and acknowledgments
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
Statement of the problem
Two main requirements for magnetic field measurements in fusion reactors of next generation:
first – the necessity to perform accurate magnetic field measurements at steady state (quasi-stationary mode) with the duration up to 3600 s;
second – operation reliability at a considerable level of penetrating radiation.
These requirements make it difficult to use only the traditional inductive methods based on pick-up coils and integrators.
To solve this problem the galvanomagnetic transducers, namely transducers based on the Hall effect, can supplement the existing magnetic field system based on the traditional inductive coils, since they do not have any particular restriction with regard to quasi-stationary and steady-state magnetic field measurements.
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
Galvanomagnetic Instrumentation: Requirements & Solutions
1. Special Hall Transducers for extreme operation conditions
2. In-situ calibration
3. Wide-band magnetic field measurement
4. Multi-channel measurement
5. High precision of measurement under considerable noise conditions
6. Signal transfer over long distances
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
1 – Hall Sensor2 – Coil 3 – Substrate4 – Pins
Integrated Magnetic Transducer & Intelligent Functions
1. Magnetic field measurement in high rate mode (real time mode).2. Magnetic field measurement in high precision mode (correction mode).3. Selftesting by formation & measurement of test magnetic field.4. Transducing function correction.5. Temperature measurement.6. Combination of galvanomagnetic and electromagnetic measurements in
united system.
2
3
4
1x
d
D
x = 0
B
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
BB
U (B)
B e B x
o
U (B)o
U (B)e
Magneticinduction, B
U (B )Ho
U = f(B)Ho
U = f(B)He
x
U (B )=He xU (B )Ho e
correction error
true (measuring)
n
0j
jjHo BaV
n
1j
1jj
HoHe BajGdB
)VG(ddB
dV
n
0j
jj
xen
1j
1jjxHe Ba
B)B(V
Baj)B(V
Transducing function:
aj - coefficients of the polynomial series
VHe = GVHo , G - drift factor
Transducing function correction
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
3D Integrated Magnetic Transducer
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
MSL Galvanomagnetic Instrumentation
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
HA
SD
SI
CS1
CN
ST OP
MXCS2
PC
IMTElectronics
PS
TL1
HC
LALC
TL2
MX – MultiplexerCN – Control moduleCS1, 2 – Current source 1, 2SD – SynchrodetectorHA – High frequency amplifierHC – High frequency ADCLA – Low frequency amplifierLC – Low frequency ADCST –StabilizerSI – Serial interfaceOP – Optical isolatorPS – Power supply unitIMT – Integrated Magnetic TransducerTL1, 2 – Transmission line 1, 2
MSL GI Electronics
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Experiments with GI on TORE SUPRA,Cadarache (France)
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
3D IMT location –
on the surface of poloidal field coil just outside the TS vessel together with the reference 3D coil system
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
The results of magnetic field measurement on TORE SUPRA (low frequency mode)
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
The results of magnetic field measurement on TORE SUPRA (selfdiagnostic)
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see next slide
10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
The results of magnetic field measurement on TORE SUPRA (HF mode, pulse #34085)
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
scale is enlarged
The results of magnetic field measurement on TORE SUPRA (HF mode, pulse #34085)
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
The results of magnetic field measurement on TORE SUPRA (HF mode, pulse #34073)
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
The results of magnetic field measurement on TORE SUPRA (HF mode, pulse #34073)
scale is enlarged
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
The same pulse (#34073) getting by coil techniques
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
… and temperature measurements (only for resolution representing)
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
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Experiments with GI on JET, Culham (UK)
3D IMT location
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
MSL GI on JET
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
The results of magnetic field measurement on JET
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In-vessel measurements using MSL 3D Hall probe
10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
CASTOR collaboration
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Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
GI Electronics and Software in details … if it is possible from the time point of view
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
8-channels signal conversion for 3D IMT
8x1
8x1
V ref
IHG
IHG
A k1k2
HG X
HG Y
HG Z
Coi
l XC
oil Y
Coi
l ZICX
ICY
ICZ
V CX
V CY
V CZ
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-1.5 -1.0 -0.5 0.0 0.5 1.0 1.5
Input, V
Output, V
Kv=10 @ Vinp < 150 mV
HF Signal compression
Kv=1 @ Vinp > 150 mV
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
ADuC 824 MicroConverter™, 24-Bit ADC with FLASH MCU
GI: Signal Processing Components
AD855X,Zero drift OA
AD7663,16-Bit, 250kSPS ADC
Intelligent Sensors (IEEE 1451.2-Compatible)
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
Comparison of Galvanomagnetic and Coil methods
• field change rate – up to 1 T/sec;•duration of flat pulse – 0.20.5 sec;• sampling frequency – 1 kHz (t = 1 msec);• measurement duration – 5 sec.
The parameters:
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
Comparison of Galvanomagnetic and Coil methods
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
GI Software
Selfdiagnostic
Two channels
HF measurement
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
116.12
116.13
116.14
116.15
116.16
116.17
116.18
0 20 40 60 80 100time, sec
V, mV
+/- 0.01%
25.155
25.165
25.175
25.185
25.195
25.205
0 5 10 15time, sec
V, mv
B=0.002T
+/-0.02%
24.0
24.2
24.4
24.6
24.8
25.0
25.2
25.4
0 20 40 60 80time, sec
V, mv
B=0.1TB=0
B=0.3T
B=1T
B=0.002T
GI main parameters: precision
Selfdiagnostic
High precisionmode of magnetic
field measurement
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
Transmission driver for GI on TORE SUPRA
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
Transmission driver for GI on JET
MSLGalvanomagnetic Instrumentation
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
I
1 2
3
456
7
8
A
II
III
A
A-AIV
Bolshakova І., Holyaka R. Magnetic field measuring transducer. Patent of Ukraine #72825 of 15.04.2005
New High Frequency Magnetic Transducer
I - traditional HT
II - highly sensitive HT
III - the loop for the electromagnetic compensation
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Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
Measuring magnetic field frequency band up to 1 MHz
Measurement accuracy (measuring method):
• in the frequency range 01 kHz (direct measurement with Hall transducer of FM-sensor)
0.1 %
• in the frequency range 1 kHz 1 MHz (measuring with Hall transducer, interference compensation by MF-sensor electromagnetic loop)
1 %
OSCILLOSCOPE
HFA
BENCHMF-
sensorsolenoid
P R O B E
...
RVS CB SWL C
B
The bench for high frequency magnetic field formation
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
The dumping oscillation current of test coil& signal of galvanomagnetic sensor
VHT (I = 20 mA)
Current of test coil Current of test coil
Current of test coilCurrent of test coil
VHT (I = -20 mA)
VHT (I = 0 mA)
VHT (I = 0 mA)
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
NEXT STEPS
Collaboration with European tokamaks:
• JET 2006-2007
• TORE SUPRA 2006-2008
• TEXTOR 2006-2007
• CASTOR 2006
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JET
Tore Supra
10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
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Qualification and validation of Hall Probe System
for potential applications in ITER
TEXTOR
CASTOR
High frequency MHD analysis (in-vessel): special techniques for
electromagnetic noise elimination and high-temperature robust Hall sensor
Perturbation field measurement (fast-reciprocating probe): integrated transducer based on Hall sensor and pick-up coil
Residual magnetic field measurements (ex-vessel): special
techniques for self-diagnostics and off-set drift reduction
Short magnetic pulse measurements (in-vessel)
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Magnetic Sensor Laboratory, Lviv Polytechnic National University, Ukraine. http://www.MSL.Lviv.ua
• The problem of quasi-stationary magnetic field measurements in fusion devices can be efficiently solved by using Hall-type galvanomagnetic transducers.
• Contrary to the traditional measuring coils, the HT can measure the steady-state and the alternating magnetic fields with sufficiently high accuracy.
• Proposed principles of instrumentation construction for quasi-stationary magnetic field measurements, based on the developed radiation hard HTs and original signal processing electronics, meet the requirements of extreme operation conditions on fusion reactors of new generation.
• The galvanomagnetic transducers and the based-on instrumentation being presented in the work, were used during the experiments with quasi steady-state magnetic fields on the tokamaks TORE SUPRA (France) and JET (UK).
Conclusion
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10th Meeting of the ITPA Topical Group on Diagnostics, Moscow, Russia
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Acknowledgments
The work was supported by:
• STCU (Ukraine)• EFDA-JET (UK)• Association EURATOM-CEA (France)• Association EURATOM-ENEA/CREATE (Italy).
…. thank you