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Nov. 10, ‘04. Support and magnet coil. KEK Hiroshi Yamaoka. Initial configuration of the iron yoke. 3T. → Too large!!. Further amount of iron is necessary. Iron Yoke configuration is optimized!. Belle. Material for return yoke. S10C(JIS) Carbon= 0.1wt% s t =310MPa s e =205MPa - PowerPoint PPT Presentation
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Support and magnet coil
KEK Hiroshi Yamaoka
Nov. 10, ‘04
Initial configuration of the iron yoke
max
083.2
Zmmdz
Bz
Br
Further amount of iron is necessary.
→ Too large!!
max
02
Zmmdz
Bz
Br
Iron Yoke configuration is optimized!
3T
Material for return yoke
S10C(JIS) Carbon= 0.1wt%t=310MPae=205MPaallow=120MPa
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0100
101
102
103
104
105
106
H(A
/m)
B(T)
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.00
500
1000
1500
2000
2500
3000
Per
mea
bili
ty
B(T)
Permeability
These dimensions are fixed,Coil length, yoke dimensions are changed.
Belle
Calculations
dz Coil-L Bmin Bmax Bc Unif(%)60 4.31 2.965 3.078 3.05 3.67170 4.32 2.966 3.077 3.049 3.60780 4.33 2.968 3.076 3.049 3.51190 4.34 2.968 3.074 3.048 3.448
100 4.35 2.97 3.073 3.047 3.352120 4.37 2.972 3.071 3.046 3.224200 4.45 2.979 3.061 3.042 2.679500 4.75 3.003 3.027 3.023 0.793550 4.8 3.005 3.025 3.017 0.661600 4.85 3.008 3.026 3.017 0.595640 4.89 3.01 3.027 3.014 0.562650 4.9 3.01 3.026 3.013 0.529660 4.91 3.009 3.027 3.013 0.595700 4.95 3.004 3.027 3.01 0.76750 5 2.999 3.028 3.006 0.958 0 100 200 300 400 500 600 700 800
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Un
ifo
rmit
y(%
)
dz(mm)
1001(%)max
min
B
BUnif
dz
Coil-L
4.25m
R2.05m
R1.8m
R0.4m
R1.0m
0
2
1
1 .241187 .72356 1.688 2.171 3.135 3.618 4.583 5.547 6.03 6.994 7.477 8.442 8.924 9.889 10.853 11.336 12.301 12.783 13.748 14.712 15.195 16.16 16.642 17.607 18.089 19.054 20.019 20.501 21.466 21.948 22.913 23.877
1111111111
0 10 20 30 40 501E-4
1E-3
0.01
0.1
1
Mag
net
ic F
ield
(T)
Distance from solenoid center(m)
Fringe/Leakage field
Flux line
Magnetic field distribution
Max. 1.8mm
Max. 90MPa<120MPa
18000tons
Fixed
Stress/deformation of End Yoke
Max. 7mm
Max. 65MPa<120MPa
Stress/deformation of Barrel Yoke
13300tons
FixedFixed
4.2mm
30
mm
4.3mm
Aluminum stabilized superconductor
NbTi:Cu:Al= 1:0.9:15.6
Strand diameter: 1.23mm
Filament diameter: 20m
Jc in NbTi at 5T, 4.2K: > 2750A/mm2
Ic at 5T, 4.2K: > 20300A
(For ATLAS)
Superconducting Solenoid
Cryostat Inner radius 3.72mOuter radius 4.4mHalf length 5.25m
Coil Mean radius 4.0mHalf length 4.93m
3T4576 turns
741A/mm2
5338A81.0H1.8GJStored Energy
Central magnetic field
Nominal currentInductance
# of turns(2 layers)
Current density
0 1 2 3 4 5-40
-20
0
20
40
60
80
100
120
140
Str
ess(
MP
a)
Distance from center(m)
Circum. direction
Axial direction
Co
mp
ress
ion
Stress level in the coil
Development of High-strength Al
4.93m(Half)
R4.
0m
Support cylinder(t=50mm) Conductor
(h=30mm)
8mm
4mm
Deformation of the coil
Solenoid center
By Makida
- Outer vac. vessel
40mm thick rLtr
Ep
2
52
75.0
1
855.0
p: Buckling pressure 0.1MPa x 2(safety factor)
2000tons
Fixed Fixed
Thickness of ・ Inner vacuum vessel ・ End plateswere optimized.
Load condition Weight of the calorimeter: 2000tons Weight of the solenoid : ~ 140tons Vacuum : 0.1MPa
Cryostat design
SUS304t =530MPa y =210MPaallow=140MPa
2000tonsFixed Fixed
Model-1
Model-2
Oct. 29, ’04KEK H. Yamaoka
118MPa<140MPa
9mm
t=40mm
t=60mmt=100mm
274MPa>140MPa
15mm
2000tons
Fixed Fixed2000tons
Fixed Fixedt=40mm
t=60mm
t=100mm
2000tons
x0.3G
Fixed Fixed
9mm
125MPa
Stiffness: D
IED 12
3HightWidthI
E: Young’s modulusI: Moment of Inertia
Model-1 Model-2
Material: SUS304
Requests to calorimeter structure; - Calorimeter is divided to several pieces in the axial direction. - One piece of calorimeter is stiff enough.
5250(Half)
4930(Half)
R40
00
R37
20
R44
00
t=50mm
t30mm, 2 layers
*Detail design is not yet done.
*Coil support system is not designed yet.
Feb. 14, ’02 H. Y
Cost estimation of Return Yoke ○ Law material \180/kg x 11000e3kg = \19.8 oku+(10%) 19.8x1.1=21.8 oku
○ Machining Total area for machining of Barrel yoke 340m2
End Yoke: 501m2
Machining cost per 1m2
\200000/m2
Total:(340+501)m2x20 万 =16.8 oku +(10%) 、 16.8x1.1=18.5 oku
○ Design cost 1 oku
○ Cost for QC 0.5 oku ○ 利益率 20 %とすると、 41.8x0.2=8.4 oku
Total 50.2 okux1.05=52.7 oku
Cost estimation of Solenoid
The way for improving field uniformity
IB
IB
Solenoid magnetZ2
R2
R1
Z1
・ Plenty of amount of iron
・ Minimize Z1,R1
・ Optimize Z2,R2
max
02
Zmmdz
Bz
Br
3T
Saturation