1. Support structure and target pre-stress
LQS01 assembly plan
Paolo Ferracin
LQS01 readiness review #1
Support structure and target pre-stress
LBNL
April 7, 2009

2. Outline Assembly of coil pack LQS01 pre-stress scenarios
Paolo Ferracin
04/07/2009

3. LQS01 coil-pack assembly procedure
Paolo Ferracin
04/07/2009

4. LQS01 coil-pack assembly procedure
Inner strong-back is attached to first coil
Inner strong-back, with first coil, is rotated to engage second coil
Paolo Ferracin
04/07/2009

5. LQS01 coil-pack assembly procedure
Placement of this bottom coil-pair on the bottom load-pad assembly of the coil-pack
Paolo Ferracin
04/07/2009

6. LQS01 coil-pack assembly procedure
Roll-over wheels are installed and assembly is placed on the surface plate
Coil-pair is rolled over, constrained in position and wheels are removed
Paolo Ferracin
04/07/2009

7. LQS01 coil-pack assembly procedure
Outer strong-back is attached and inner strong-back is detached
Paolo Ferracin
04/07/2009

8. LQS01 coil-pack assembly procedure
Coils are lifted to be placed on top of bottom coils
Paolo Ferracin
04/07/2009

9. LQS01 coil-pack assembly procedure
COIL-BORE ALIGNMENT
DONUTS
BOTTOM COIL-PAIR
ANCHORS
BOTTOM LOAD PAD
ASSEMBLY
Paolo Ferracin
04/07/2009

10. Test of the coil-pack assembly procedure
Placement of 2 dummy coils on bottom pad
Roll over operation tested with coil 4 and 5
Placement of coil 4 and 5 on top of dummy coils
Paolo Ferracin
04/07/2009

11. Outline Assembly of coil pack LQS01 pre-stress scenarios
Paolo Ferracin
04/07/2009

12. LQS01 target pre-stress Scenario 1: pre-load for 240 T/m (13.8 kA)
Shell
Strain
From 520 to 1860 µε
Stress
From 40 to 165 MPa
Coil pole
From -400 to -816 µε
From -57 to -128 MPa
Coil peak stress: 170 MPa
Paolo Ferracin
04/07/2009

13. LQS01 target pre-stress Scenario 2: pre-load for 230 T/m (13.2 kA)
Shell
Strain
From 386 to 1714 µε
Stress
From 29 to 152 MPa
Coil pole
From -295 to -701 µε
From -42 to -112 MPa
Coil peak stress: 160 MPa
Paolo Ferracin
04/07/2009

14. LQS01 target pre-stress Scenario 3: pre-load for 220 T/m (12.6 kA)
Shell
Strain
From 252 to 1567 µε
Stress
From 19 to 139 MPa
Coil pole
From -189 to -586 µε
From -27 to -97 MPa
Coil peak stress: 150 MPa
Paolo Ferracin
04/07/2009

15. Dummy coil stress at 77 K Measured azimuthal: -194 ± 25 MPa
Target azimuthal: -225 MPa
Paolo Ferracin
04/07/2009

16. Shell azimuthal microstrain during LQSD loading
Initial “gap-keys” condition: ~200 microstrain
Paolo Ferracin
04/07/2009

17. Pre-load scenarios and comparison with TQS02 (scaled) cases
ey (293 K)
ey (4.5 K)
σy (293 K)
σy (4.5 K)
Microstrain
MPa
Shell
240 T/m, σpeak_coil = 170 MPa
+520 ± 190
+1860 ± 222
+40 ± 15
+165 ± 18
230 T/m, σpeak_coil = 160 MPa
+386 ± 190
+1714 ± 222
+29 ± 15
+152 ± 18
220 T/m, σpeak_coil = 150 MPa
+252 ± 190
+1567 ± 222
+19 ± 15
+139 ± 18
TQS02a
+1506 ± 284
+169 ± 30
TQS02b
+1767 ± 333
+193 ± 37
TQS02c
+1829 ± 334
+198 ± 43
TQS02d
+1842 ± 319
+200 ± 37
Ti pole
-400 ± 157
-816 ± 231
-57 ± 12
-128 ± 24
230 T/m, σpeak_coil = 160 MPa
-295 ± 157
-701 ± 231
-42± 12
-112 ± 24
220 T/m, σpeak_coil = 150 MPa
-189 ± 157
-586 ± 231
-27 ± 12
-97 ± 24
-960 ± 62
-142 ± 13
Paolo Ferracin
04/07/2009