1. Introduction to W7-X Coil Testing at CEA – Saclay, France
G.Croari – Barth seminar 2008

2. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
Outline
Test facility description
Coil test procedure
Conclusion
G.Croari
1/15
irfu / SACM

3. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
Outline
Test facility description
Coil test procedure
Conclusion
Cryostats, valve boxes, satellite
Power supply
Pumping system
Cryogenic part (Refrigerator/liquifier)
Data acquisition system
G.Croari
1/15
irfu / SACM

4. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
Outline
Test facility description
Coil test procedure
Conclusion
Cryostats, valve boxes, satellite
Power supply
Pumping system
Cryogenic part (Refrigerator/liquifier)
Data acquisition system
Documentation
Incoming Inspection tests
Coils into cryostat
Outgoing check
G.Croari
1/15
irfu / SACM

5. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
Outline
Test facility description
Coil test procedure
Conclusion
Cryostats, valve boxes, satellite
Power supply
Pumping system
Cryogenic part (Refrigerator/liquifier)
Data acquisition system
Documentation
Incoming Inspection tests
Coils into cryostat
Outgoing check
My contribution
G.Croari
1/15
irfu / SACM

6. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1. Test Facility Description
Cryostats, valve boxes, satellite
Power supply
Pumping system
Cryogenic part (Refrigerator/liquifier)
Data acquisition system
G.Croari
2/15
irfu / SACM

7. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.a) Cryostat, Valve boxes, Satellite
Cryostat 1
Valve box C 1
Satellite
Valve box C 2
Cryostat 2
Test Frames
G.Croari
3/15
irfu / SACM

8. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.a) Cryostat, Valve boxes, Satellite
Cryostat detail
Connections for Coil A
Nitrogen Shield
Connections for Coil B
G.Croari
3/15
irfu / SACM

9. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.a) Cryostat, Valve boxes, Satellite
Valve box detail
Valves
Current leads
G.Croari
4/15
irfu / SACM

10. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.a) Cryostat, Valve boxes, Satellite
Valve box detail
Safety
Valves
Cablings
Calibration Leak
G.Croari
4/15
irfu / SACM

11. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.b) Power Supply
Input:
380 Vac
3-phase
Simplified schematic
Transformer
Thristors
Iout
Load
G.Croari
5/15
irfu / SACM

12. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.b) Power Supply
Input:
Max absorption 980 A
Nominal Power 700 KVA
Water cooled
Output:
Max current 25KA
Max Voltage 10V
Regulation:
<+-10 E-4 on inductive Loads
<+-10 E-3 on resistive Loads
G.Croari
5/15
irfu / SACM

13. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.c) Pumping System
G.Croari
6/15
irfu / SACM

14. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.c) Pumping System
Primary system
( 5 E – 3 mbar )
Secondary system
( 1 E – 6mbar )
G.Croari
6/15
irfu / SACM

15. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.d) Cryogenic part: Refrigerator / Liquifier
Cold Box
Nitrogen Exchanger
Heat Exchangers
Turbine
Cold Helium
G.Croari
7/15
irfu / SACM

16. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.d) Cryogenic part: Refrigerator / Liquifier
Specifications of cold part:
Total mass flow rate 46 gr/sec 300 K
Refrigerating power = 4,2 K
LHe production = 70 Lt / hour
5000 Litres
LHe tank
G.Croari
7/15
irfu / SACM

17. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.e) Data Acquisition System
Signals:
Voltage drops
Mass flow meters
Current of Power Supply
Pressure drops
Temperature sensors
Strain gauges
Extensometer
Coils & Test Facility
Coils
G.Croari
8/15
irfu / SACM

18. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
1.e) Data Acquisition System
Sampling rates table
Sensor type
Voltage
Current
Others
Condition
- Cool down / Warm up (phase 1)
0.025Hz
- Cold Test day (phase 2)
1Hz
- Quench / Fast Discharge (quench)
5kHz
100Hz
G.Croari
8/15
irfu / SACM

19. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2. Coil Test Procedure
Documentation
Incoming Inspection tests
Coils into cryostat
Outgoing check
G.Croari
9/15
irfu / SACM

20. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.a) Documentation
Scope and Requirements
G.Croari
10/15
irfu / SACM

21. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.a) Documentation
Scope and Requirements
Documentation
10/15
G.Croari
10/15
irfu / SACM

22. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.a) Documentation
Scope and Requirements
Documentation
Non Conformrmity Report
G.Croari
10/15
irfu / SACM

23. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.b) Incoming Inspection Tests
Unloading from the lorry
G.Croari
11/15
irfu / SACM

24. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.b) Incoming Inspection Tests
Unloading from the lorry
Installation under a test frame
G.Croari
11/15
irfu / SACM

25. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.b) Incoming Inspection Tests
Unloading from the lorry
Installation under a test frame
Bending and Joint box installation
G.Croari
11/15
irfu / SACM

26. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.b) Incoming Inspection Tests
Unloading from the lorry
Installation under a test frame
Bending and Joint box installation
Cablings and tests: Temperature sensors, Strain gauges, Extensometers
G.Croari
11/15
irfu / SACM

27. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.b) Incoming Inspection Tests
Unloading from the lorry
Installation under a test frame
Bending and Joint box installation
Cablings and tests: Temperature sensors, Strain gauges, Extensometers
QD Wire check, DC insulation test
G.Croari
11/15
irfu / SACM

28. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.c) Coils Into Cryostat
Coil at open cryostat: QD wire check, DC test
G.Croari
12/15
irfu / SACM

29. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.c) Coils Into Cryostat
Coil at open cryostat: QD wire check, DC test
Under Vacuum: Leak test
Calibration leak
Coil leak
G.Croari
12/15
irfu / SACM

30. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.c) Coils Into Cryostat
At open cryostat: QD wire check, DC test
Under Vacuum: Leak test
Coils at cryogenic temperature:  Current test  AC test, DC test
G.Croari
12/15
irfu / SACM

31. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.c) Coils Into Cryostat
At open cryostat: QD wire check, DC test
Under Vacuum: Leak test
Coils at cryogenic temperature: Current test,  AC test  DC test
AC test is to test the interlayer insulation
G.Croari
12/15
irfu / SACM

32. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.c) Coils Into Cryostat
At open cryostat: QD wire check, DC test
Under Vacuum: Leak test
Coils at cryogenic temperature: Current test, AC test,  DC test 
DC test is a general check of insulation
G.Croari
12/15
irfu / SACM

33. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.d) Outgoing check
Before shipment: QD wire check
Outgoing check
G.Croari
13/15
irfu / SACM

34. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
3. Conclusion
My Contribution
G.Croari
14/15
irfu / SACM

35. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2) Conclusion
Coil testing is about 60 % accomplished
The testing rate increased significantly
from 2 coils / year in 2003 up to 18 coils / year in 2007
A failure can be considered as a chance to learn more
G.Croari
15/15
irfu / SACM

36. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
2.a) My contribution
Daily work:
What I would like to improve:
Daily communication between CEA and IPP
La Langue Française
Documentation in case of unexpected behaviour during test
Control Systems
Understanding of the test facility
Data Acquisition Systems
G.Croari
15/15
irfu / SACM

37. Wendelstein 7–X training seminar
Barth, April , 2008
Max-Planck-Institut für Plasmaphysik
1-YKB01 MC
Thanks to...
CEA:
L.Genini
B.Renard
L.Vieillard
All the French technicians
IPP:
H.Viebke
K.Hertel
J.Baldzuhn
H.Ehmler
G.Croari
irfu / SACM