Transcript Cable Test at CERN LARP Collaboration Meeting 13 Nov. 4-6, 2009 Port Jefferson

BNL - FNAL - LBNL - SLAC
LARP Collaboration Meeting 13
Nov. 4-6, 2009
Port Jefferson
Cable Test at CERN
Giorgio Ambrosio
Fermilab
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Cable Sample Holder
FRESCA collars
Pre-load by bolts
through the collars
Voltage taps
9
Report with sample holder
description is on the plone
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
8
6
5
3 2
1
+ lead (#1)
- lead (#2)
10 11
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14
16 17 18
2
1.1
1.0
0.9
0.8
B / Bcentre [-]
0.7
0.6
0.5
FRESCA field parallel to
self-field between cables
0.4
0.3
0.2
0.1
0.0
0
200
400
600
800
1000
1200
1400
1600
1800
z [mm] with respect to the bottom of the key of the sample holder
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Cable self-field
• COMSOL model: 0.113 T/kA
• ANSYS model: 0.107 T/kA
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Coil #08 Cable Sample
Sample “4-FRESCA-FNAL-RRP54/61-0909”:
• Cables: 27 strands Keystoned
– Strand diameter: 0.7 +/- 0.002 mm
– Strand: Nb3Sn RRP 54/61 made by OST (billet: 9560)
•
•
•
•
•
•
•
•
•
•
width: (bare cable) 10.077 +0.000 -0.100 mm
mid thickness: (bare cable) 1.26 +/- 0.010 mm
keystone angle: 1.0 +/- 0.01 deg.
Sample length: 1725 mm (splices included)
Cable spool: 983R (used for LQ coil #08)
LQ HT (cables reacted with LQ coil #08)
Insulation: S2-sleeve (0.1 mm thick) with palmitic acid
Expected Ic: 16041 A @ 11.41 T (9.6T FRESCA + 1.81T self-field) 4.33 K
Prestress: 40 MPa @ 300 K (3000 Kg per bolt)
0.5 mm Kapton added after impregnation
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Example of V-I ramp
LQ08 Cable Sample
5
0
Voltage (uV)
0
5000
10000
15000
20000
25000
-5
V_cable 1
-10
V_cable 2
-15
-20
-25
Current (A)
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Ramp Rate Study at 4.3K
Ramp rate study at 4.3K
16.20
16.00
Current (kA)
15.80
15.60
15.40
• small effect of Ramp Rate
• ~small effect of waiting time
15.20
w/o waiting
waiting 14 min
15.00
0
200
400
600
800
1000
1200
Ramp Rate (A/s)
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Max Quench Current
Max Quench Current vs. Field and Temperature
Quench current (kA)
26.0
24.0
4.3 K
22.0
1.9 K
20.0
Beginning of voltage rise
18.0
16.0
14.0
12.0
10.0
0
2
4
6
8
10
Total Field (T) - including self-field
12
14
Note: the Iq was lower every time the field was changed!
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Strand – Cable Ic Comparison
• Started comparison of strand and cable Ic
measurement with feedback to SSL computation
– Include strand self-field; how much?
 Yes: 0.483 T/kA (Vadim: assuming current redistribution within
each filament)
– Take strain into account; how?
 Yes: Perform best fit of cable Ic data using parameterization
(Arno’s model) based on extracted witness samples (BNL and FNAL
data), and strain as fit parameter
• -0.085% additional thermal strain in cable test (SS sample holder)
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Witness Sample Test Summary
Cable ID
Wire ID
B0953R
B0973R
B0975R
B0978R
B0979R
B0983R
B0984R
B0989R
B0990R
LQ-C05
LQ-C03
LQ-C04
LQ-C06
LQ-C07
LQ-C08
LQ-C09
LQ-C10
LQ-C11
Cu/Non- Ic(12T)_EX
HT # Temp Time
Cu
AVG
(oC)
(h)
A
FNAL
643
48
0.85
560
0.90
BNL
639
50
0.84
536
FNAL
641
48
0.86
586
BNL
636
49
0.85
545
FNAL
641
48
0.84
571
BNL
639
50
0.86
567
Arup Ghosh
s
A
7
44
22
34
13
13
% of Degrad
Mean ation
1.3%
6.0%
8.2%
3.8%
6.2%
2.3%
2.3%
9.3%
5.3%
8.0%
6.1%
6.2%
11
Cable test, 4.33K
Cable test, 1.87K
Coil #07, 4.33K, 0%
Coil #07, 1.87K, 0%
Coil #07, 4.33K, -0.085%
Coil #07, 1.87K, -0.085%
LQS01
Coil #08, 4.33K, 0%
Coil #08, 1.87K, 0%
Coil #08, 4.33K, -0.085%
Coil #08, 1.87K, -0.085%
24000
22000
20000
Current (A)
18000
16000
14000
12000
10000
8000
10.0
SSL at 4.33K = 13880A
13433 A assuming the same add. strain of the cable
 -3% per -0.085% strain (sensitivity)
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
Peak field (T)
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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35
PS limit = 32 kA
30
Iquench 4.3K
Iquench 1.9K
Current (kA)
25
20
15
10
FIRST LOOK AT ALL V-I DATA
5
0
0
1
2
3
4
5
6
7
8
9
10
11
12
Total field (T) including cable self-field
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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13
35
Iquench 4.3K
Iquench 1.9K
30
V-H at 4.35 K
V-H at 1.84 K
Current (kA)
25
20
H-ramp limit
NO quench
15
10
FIRST LOOK AT ALL DATA
5
0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Total field (T) including cable self-field
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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LQ 08 V-I and V-H tests @ 4.2 K
2000
9560 Round Ti V-I
1800
9560 extr. 983 Ti #2 V-I
9560 Round Ti V-H
Ic[A], Is[A]
1600
1400
9560 extr. 983 Ti #2 V-H
LQS01 Layer 1 Load Line
1200
LQS01 Layer 2 Load Line
1000
800
Good match of stability
threshold in 0-9T range
600
400
200
0
0
1
2
3
4
5
6
7
8
9
10 11
12 13
14 15
16
Tc0[K]
Bc20[T]
B[T]
Sample
Is[A] range 0-4T
Is[A] range 4-8T
Is[A] range 8-10T
Ic @15T
Ic @12 T
9560 Round Ti
1112.5 ± 12.5
1087.5 ± 12.5
837.5 ± 12.5
290
589
9560 extr. 983 Ti #1
837.5 ± 12.5
462.5 ± 12.5
412.5 ± 12.5
Iq 225
Iq 472
276
559
LARP
CM13
PortTiJefferson
– Nov. 4-6,
2009
9560
extr.–983
#2
1040
± 15
– CERN Cable
Test
1012.5G.
± Ambrosio
12.5
858 ± 15
17.197
15
26.286
Extracted Comparison @ 4.2 K
LQ 06 9533 Extr 978 Ti V-I
LQ 07 9532 Extr 979R SS V-I
LQ 08 9560 Extr 983 Ti V-I
LQ 09 9534-5 Extr 984 Ti V-I
LQ 06 9533 Extr 978 Ti V-H
LQ 07 9532 Extr 979R SS V-H
LQ 08 9560 Extr 983 Ti V-H
LQ 09 9534-5 Extr 984 Ti V-H
LQS01 Layer 1 Load Line
LQS01 Layer 2 Load Line
2000
1800
1600
Ic[A]
1400
1200
1000
800
600
400
200
0
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
B[T]
Sample
Is[A] Range 0-4T
Is[A] Range 4-8T
Is[A] Range 8-10T
Ic @ 12T
C
Tc0
Bc2
LQ 06 9533 Extr 978 Ti
812 ± 12.5
612.5 ± 12.5
562.5 ± 12.5
562
10082
16.239
27.05
LQ 07 9532 Extr 979R SS
912.5 ± 12.5
837.5 ± 12.5
787.5 ± 12.5
516
10149
16.472
25.873
LQ 08 9560 Extr 983 Ti
1040 ± 15
1012.5 ± 12.5
858 ± 15
564
10321
17.198
26.286
LQ 09 9534-5 Extr 984 Ti
937.5 ± 12.5
1012.5 ± 12.5
862.5 ± 12.5
574
10166
17.048
26.677
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G.D.
Ambrosio
– CERN Cable Test
Turrioni
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Coil #06 BNL Witness Samples
HT_Num
BathTemp Jc(12T) Ic(12T) Ic(11_5T) Ic(11T) Ic(10T) Ic(9T) Ic(8T) Iq(11_5T) n(11_5T) Is Delta_Is RRR
Comments
FNAL-LQ-C06
4.233
2842
588
645
709
854
1019 1216
665
50
950
50
193
B0978R Extracted Strand
FNAL-LQ-C06
4.233
2809
581
639
706
847
1019
660
48
950
50
203
B0978R Extracted Strand
FNAL-LQ-C06
4.219
2850
590
648
714
858
1026
674
45
1050
50
189
B0978R Extracted Strand
FNAL-LQ-C06
4.234
2624
543
596
653
784
933
611
34
950
50
185 B0978R Extracted Strand, All Voltage in NP
2781
106
3.8%
576
22
3.8%
632
24
3.8%
696
29
4.1%
836
35
4.2%
999
44
4.4%
1216
653
28
4.3%
44
7
16.1%
975
50
5%
50
0
0.0%
192
8
HT_Num
BathTemp Jc(12T) Ic(12T) Ic(11_5T) Ic(11T) Ic(10T) Ic(9T) Ic(8T) Iq(11_5T) n(11_5T) Is Delta_Is RRR
FNAL-LQ-C06
4.201
2993
619
677
745
894 1065 1264
691
53 950
50 180
FNAL-LQ-C06
4.24
2883
597
653
718
865 1031 1227
681
44 1000
0 177
2938
78
2.6%
608
16
2.6%
665
17
2.6%
732
19
2.6%
880
21
2.3%
1048
24
2.3%
1246
26
2.1%
686
7
1.0%
5.34%
5.35%
4.96%
4.92%
4.97% 4.65% 2.37%
4.88%
49
6
13.1%
975
35
3.6%
FNAL sample with Is = 563 A
reached the critical surface at B
≥ 10 T
 variability? Other factors?
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
0
Comments
177
BNL witness samples of
coil #06 show Is ~ 950 A
17
35
Iquench 4.3K
Iquench 1.9K
30
V-H at 4.35 K
V-H at 1.84 K
Current (kA)
25
20
H-ramp limit
NO quench
15
Performance at 1.9 K is better than at 4.3 K;
TQ02-series behaved differently
Why?
…strain, transv. pressure, more conductor,
disturbance spectrum, …
10
FIRST LOOK AT ALL DATA
5
0
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Total field (T) including cable self-field
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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Extracted Comparison @ 1.9 K
2000
LQ 06 9533 extr. 978R Ti V-I
LQ 07 9532 Extr. 979R SS V-I
LQ 09 9534-5 extr. 984 Ti V-I
LQ 06 9533 extr. 978R Ti V-H
LQ 07 9532 Extr. 979R SS V-H
LQ 09 9534-5 extr. 984 Ti V-H
LQS01 Layer 1 Load Line
LQS01 Layer 2 Load Line
1800
Ic[A], Is[A]
1600
1400
1200
1000
800
600
400
Strand stability at 1.9K is
200
between
cable and magnet
0
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
B[T]
Sample
Is[A] range 0-4T
Is[A] range 4-8T
Is[A] range 8-10T
Ic @15T
Ic @12 T
LQ 06 9533 extr. 978R Ti
887.5 ± 12.5
637.5 ± 12.5
562.5 ± 12.5
435
Iq 627
LQ 07 9532 Extr. 979R SS
937.5 ± 12.5
687.5 ± 12.5
612.5 ± 12.5
378
Iq 682
LQ 09 9534-5 Extr 984 Ti
1287.5 ± 12.5
525 ± 25
775 ± 25
431
760
Conclusions
• The test at FRESCA of the LQ cable was very
successful
– Seen transition at B ≥ 9T
– Triggered an interesting comparison with strand tests
• The comparison with TQ02-series models suggests
that other factors may contribute to 1.9K stability
–
–
–
–
–
Disturbance spectrum?
Strain (long. and/or due to transverse pressure)?
Micro-cracks?
Variability of long strand/cable lengths?
…
LARP CM13 – Port Jefferson – Nov. 4-6, 2009
G. Ambrosio – CERN Cable Test
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