definitions: angles related to magnetic field direction
DESCRIPTION
Definitions: angles related to magnetic field direction. Database values update. Updates about ~1 mrad: 1006:~ 1 mrad GEOREF discrepancy 1007, 1013, 2004: original error in IPT mole data analysis 2003:original error in 15m shaft data analysis 3002:probable measurement error - PowerPoint PPT PresentationTRANSCRIPT
Fiducial S
B
magfid_ angle
georef_ angle
mag_ angle
C old mass mean plane +
Positive angle direction is anticlockwise when looking from the connection (upstream) side (ref. LHC -M-ES-0001)
Mag_ angle=magfid_ angle + georef_ angle
Fiducial T
D11
D9
endfid_ upstreamendfid_ downstream
Definitions: angles related to magnetic field direction Definitions: angles related to magnetic field direction
WP3
WP8
add.
A1
A2
A1
A2
A1
A2
UD
UD
1001
0.25
shaf
ts09
.05.
011.
911
850
0.93
0.36
1.18
0.61
1.00
1.00
-0.5
71002
-6.6
2sh
afts
19.0
6.01
1.9
1185
09.
047.
852.
691.
501.
001.
00-1
.19
1003
-0.7
9-1
.62
shaf
ts21
.11.
011.
911
850
0.70
-0.1
1-0
.92
-1.7
32.
002.
00-0
.81
1006
-1.4
0-0
.45
-1.7
1SS
W-A
C07
.10.
0330
03
2.20
2.30
1.75
1.85
0.30
0.30
0.10
1007
-0.1
30.
34IP
Tm
ole
21.1
0.02
300
20-0
.70
-0.4
7-0
.83
-0.6
00.
500.
500.
231008
0.08
-0.9
30.
21SS
W-A
C17
.09.
0330
03
1.00
1.35
1.08
1.43
0.30
0.30
0.35
1009
-0.6
9-0
.43
SSW
06.1
2.02
1.9
1185
01.
401.
200.
710.
510.
300.
30-0
.20
1010
-0.2
0-0
.07
IPTm
ole
01.1
0.02
300
201.
101.
400.
901.
200.
500.
500.
301012
-0.7
0-1
.14
SSW
11.1
0.02
4.2
9000
0.90
1.10
-0.2
4-0
.04
0.30
0.30
0.20
1013
0.20
-0.4
10.
27IP
Tm
ole
24.1
0.02
300
20-0
.14
0.20
-0.5
5-0
.21
0.50
0.50
0.34
1014
0.13
-0.0
40.
41SS
W08
.11.
021.
911
850
-0.2
0-0
.28
-0.2
4-0
.32
0.30
0.30
-0.0
81015
1.27
1.48
SSW
07.0
4.03
1.9
1185
0-1
.10
-0.9
80.
380.
500.
300.
300.
121016
0.11
-0.1
4-0
.93
SSW
16.0
6.03
4.2
9000
-0.0
4-0
.15
-0.1
8-0
.29
0.30
0.30
-0.1
21017
-1.1
0-0
.98
SSW
26.0
3.03
1.9
1185
01.
331.
120.
350.
140.
300.
30-0
.21
1018
-0.5
5-0
.45
SSW
22.0
4.03
1.9
1185
01.
921.
971.
471.
520.
300.
300.
061019
-0.0
8-0
.25
SSW
27.0
3.03
1.9
1185
00.
430.
520.
180.
270.
300.
300.
091022
0.67
SSW
?1.
911
850
-2.8
4-0
.14
-2.1
70.
540.
300.
302.
701023
-0.1
1-0
.47
SSW
10.0
7.03
4.2
9000
1.04
1.38
0.57
0.91
0.30
0.30
0.34
1024
-0.4
6SS
W-A
C28
.01.
0430
03
0.82
0.75
0.36
0.29
0.30
0.30
-0.0
71025
1.22
1.37
SSW
25.0
7.03
4.2
9000
-0.4
1-0
.45
0.96
0.92
0.30
0.30
-0.0
41026
0.89
SSW
25.0
6.03
4.2
9000
-0.2
5-0
.50
0.64
0.39
0.30
0.30
-0.2
51028
-0.4
0SS
W-A
C06
.02.
0430
03
1.66
1.26
1.26
0.86
0.30
0.30
-0.4
01030
-1.4
1SS
W-A
C16
.02.
0430
03
1.09
1.20
1.09
1.20
0.30
0.30
0.11
1031
-0.2
5SS
W-A
C23
.01.
0430
03
0.59
0.64
0.34
0.39
0.30
0.30
0.05
1048
-1.7
1SS
W-A
C26
.01.
0430
03
1.76
1.75
0.05
0.04
0.30
0.30
-0.0
11050
-0.5
0SS
W-D
C20
.10.
031.
911
850
0.68
0.62
0.18
0.12
0.30
0.30
-0.0
61061
-0.3
8SS
W2-
AC
08.0
4.04
300
30.
230.
40-0
.16
0.02
0.30
0.30
0.18
0.38
-0.0
40.
00-0
.42
-0.4
21078
-2.3
9SS
W-A
C02
.04.
0430
03
1.70
1.98
-0.7
0-0
.42
0.30
0.30
0.28
1.85
2.52
-0.5
40.
130.
672003
-0.8
8-1
.72
15m
sha
ft01
.12.
011.
911
850
2.30
1.81
0.58
0.09
1.00
1.00
-0.4
9-
-2004
-2.2
0-2
.04
IPT m
ole
18.1
2.02
300
201.
201.
53-0
.84
-0.5
11.
001.
000.
32-
-2006
-2.4
3-2
.22008
-1.1
9SS
W-A
C21
.01.
0430
03
1.29
1.35
0.10
0.16
0.30
0.30
0.06
--
2012
-2.8
2SS
W-A
C21
.05.
0330
03
1.59
2.00
-1.2
3-0
.82
0.30
0.30
0.41
--
2016
?SS
W-A
C13
.04.
0430
03
0.20
0.25
0.30
0.30
0.05
-0.3
70.
290.
662018
-0.7
8SS
W-D
C01
.09.
031.
911
850
1.02
0.71
0.24
-0.0
70.
300.
30-0
.32
--
2020
-1.4
2SS
W-D
C27
.08.
031.
911
850
1.39
1.23
-0.0
3-0
.19
0.30
0.30
-0.1
6-
-2021
-5.5
1SS
W-A
C20
.02.
0430
03
4.57
4.86
-0.9
4-0
.65
0.30
0.30
0.29
4.70
4.78
-0.8
1-0
.73
0.08
2022
-0.2
9SS
W-A
C05
.03.
0430
03
-0.3
9-0
.15
-0.6
8-0
.44
0.30
0.30
0.24
0.20
0.40
-0.0
90.
110.
202040
-1.2
8SS
W-A
C10
.02.
0430
03
0.79
0.96
-0.4
9-0
.32
0.30
0.30
0.16
1.24
1.47
-0.0
40.
190.
232041
?SS
W-A
C10
.02.
0430
03
-0.1
3-0
.18
0.30
0.30
-0.0
62046
-0.5
2SS
W-A
C04
.03.
0630
03
0.56
0.78
0.04
0.26
0.30
0.30
0.22
2048
?SS
W-A
C29
.03.
0430
03
0.17
-0.1
00.
300.
30-0
.27
3002
-0.3
2-0
.12
IPT m
ole
21.1
1.01
300
20-1
.69
-2.0
7-1
.81
-2.1
91.
001.
00-0
.38
--
3003
-1.4
2-1
.03
SSW
-AC
05.0
4.04
300
30.
675
0.93
5-0
.36
-0.1
00.
300.
300.
260.
690.
64-0
.34
-0.3
9-0
.05
3005
0.12
0.04
SSW
-DC
25.0
4.03
1.9
1185
0-0
.21
-0.3
1-0
.17
-0.2
70.
300.
30-0
.10
--
3006
-3.5
7-3
.45
SSW
-DC
13.0
1.04
300
103.
645
4.01
50.
080.
450.
300.
300.
37-
-3007
0.59
0.57
SSW
-DC
24.0
4.03
4.2
9000
-0.8
7-0
.84
-0.3
0-0
.27
0.30
0.30
0.03
--
3009
-0.4
1-0
.65
SSW
-AC
29.0
1.04
300
30.
577
0.56
9-0
.07
-0.0
80.
300.
30-0
.01
0.53
0.92
-0.1
20.
270.
393010
-8.2
9SS
W-A
C29
.03.
0430
03
8.27
68.
631
-0.0
10.
340.
300.
300.
363011
-2.1
8-2
.29
-2.1
7SS
W07
.04.
031.
911
850
2.26
-0.0
30.
30n.
a.3013
-0.4
9SS
W28
.05.
034.
290
000.
510.
390.
02-0
.10
0.30
0.30
-0.1
2-
-3014
-1.7
1SS
W27
.06.
034.
290
001.
9n.
a.0.
190.
30n.
a.n.
a.3019
0.16
SSW
-AC
27.0
2.04
300
3-0
.13
0.38
90.
030.
550.
300.
300.
510.
370.
350.
530.
51-0
.02
3022
-0.2
7-0
.46
SSW
-AC
12.0
3.04
300
30.
165
0.35
7-0
.11
0.09
0.30
0.30
0.19
--
3031
-1.6
0SS
W-A
C30
03
0.46
0.75
0.29
3034
0.57
0.76
SSW
-AC
10.0
3.04
300
3-0
.77
-0.2
8-0
.20
0.29
0.30
0.30
0.49
--
3036
0.46
SSW
-AC
18.0
3.04
300
3-0
.28
-0.1
80.
180.
280.
300.
300.
10-0
.55
-0.1
2-0
.09
0.34
0.43
3041
-2.9
6-1
.55
SSW
-AC
23.0
1.04
300
32.
543.
07-0
.42
0.11
0.30
0.30
0.53
--
3042
1.12
SSW
-DC
02.1
0.03
1.9
1185
0-0
.84
-0.7
40.
280.
380.
103043
-0.8
7SS
W-A
C04
.05.
0430
03
0.34
90.
846
-0.5
2-0
.02
0.30
0.30
0.50
--
3044
-2.1
7-2
.03
SSW
-AC
09.0
3.04
300
32.
388
2.68
30.
220.
510.
300.
300.
30-
-3054
-1.1
4SS
W-A
C28
.04.
0430
03
1.19
31.
514
0.05
0.37
0.30
0.30
0.32
1.94
1.98
0.80
0.84
0.04
3055
-1.4
0SS
W-A
C27
.04.
0430
03
1.95
62.
126
0.56
0.73
0.30
0.30
0.17
2.18
2.12
0.78
0.72
-0.0
63064
-2.3
3SS
W-A
C18
.02.
0430
03
2.65
82.
038
0.33
-0.2
90.
300.
30-0
.62
--
3065
0.96
SSW
-AC
26.0
1.04
300
3-1
.05
-1-0
.09
-0.0
40.
300.
300.
05-
-3073
?SS
W-A
C03
.05.
0430
03
-5.5
1-5
.29
0.22
-0.5
9-0
.67
-0.0
83082
-0.6
2SS
W-A
C11
.02.
0430
03
-0.4
0.25
1-1
.02
-0.3
70.
300.
300.
65-
-
Twist
s
//
EN
DFI
DEN
DAN
GLE
Magnet
GEO
_R
EF
Measu
rem
ent
1
Method
Date
T [K]
I [A]
MAG
FID
MAG
AN
GLE
Database values updateDatabase values update
Updates about ~1 mrad:
-1006: ~ 1 mrad GEOREF discrepancy
-1007, 1013, 2004: original error in IPT mole data analysis
- 2003: original error in 15m shaft data analysis
- 3002: probable measurement error
Updates about 0.1-0.3 mrad:
1003, 1009, 1010, 1015, 1017, 2008, 3009, 3034, 3044
(variations in GEOREF, analysis or measurement errors)
Rotational stability of CM inside cryostatRotational stability of CM inside cryostat
Change of MAGFID from WP03 to WP08(measured by TS/ SU)
-1.00
-0.50
0.00
0.50
1.00
1.50
2.0010
0310
0610
0710
0810
0910
1010
1210
1310
1410
1510
1610
1710
1810
1910
2210
2310
2410
2510
2610
2810
3010
3110
4810
5010
6110
7820
0320
0420
0620
0820
1220
1620
1820
2020
2120
2220
4020
4120
4620
4830
0230
0330
0530
0630
0730
0930
1030
1130
1330
1430
1930
2230
3130
3430
3630
4130
4230
4330
44
Magnet name
Rota
tion (
mra
d)
RMS average = 0.49 mrad(only 30 magnets for which field direction measurement exists considered here)
RMS average = 0.49 mrad(only 30 magnets for which field direction measurement exists considered here)
Field direction wrt CM mean plane (MAG_ANGLE) in Alstom dipoles
1002
1003
1006
1007
1008
1009
1010
1012
1013
1014
1015
1016
1017
1018
1019
1022
1023
1024
1025
1026
1028
1030
1031
1048 10
50
1061
1078
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.010
0110
0210
0310
0410
0510
0610
0710
0810
0910
1010
1110
1210
1310
1410
1510
1610
1710
1810
1910
2010
2110
2210
2310
2410
2510
2610
2710
2810
2910
3010
3110
3210
3310
3410
3510
3610
3710
3810
3910
4010
4110
4210
4310
4410
4510
4610
4710
4810
4910
5010
5110
5210
5310
5410
5510
5610
5710
5810
5910
6010
6110
6210
6310
6410
6510
6610
6710
6810
6910
7010
7110
7210
7310
7410
7510
7610
7710
7810
79
Dipole Number
Inte
gra
ted
Fie
ld D
ire
cti
on
(in
clu
din
g e
nd
s)
[mra
d]
Aperture 1 (external)
Aperture 2 (internal)
Field direction wrt CM mean plane (MAG_ANGLE) in Ansaldo dipoles20
04
2008
2012
2016
2018
2020
2021
2022
2040
2046
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
Dipole Number
Inte
gra
ted
Fie
ld D
ire
cti
on
(in
clu
din
g e
nd
s)
[mra
d]
Aperture 1 (external)
Aperture 2 (internal)
Field direction wrt CM mean plane (MAG_ANGLE) in Noell dipoles
3002
3003
3005
3006
3007
3009
3010
3013
3019
3022
3031
3034
3036
3041
3042
3043
3044
3054
3055
3064
3065
3082
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.530
0130
0230
0330
0430
0530
0630
0730
0830
0930
1030
1130
1230
1330
1430
1530
1630
1730
1830
1930
2030
2130
2230
2330
2430
2530
2630
2730
2830
2930
3030
3130
3230
3330
3430
3530
3630
3730
3830
3930
4030
4130
4230
4330
4430
4530
4630
4730
4830
4930
5030
5130
5230
5330
5430
5530
5630
5730
5830
5930
6030
6130
6230
6330
6430
6530
6630
6730
6830
6930
7030
7130
7230
7330
7430
7530
7630
7730
7830
7930
8030
8130
8230
83
Dipole Number
Inte
gra
ted
Fie
ld D
ire
cti
on
(in
clu
din
g e
nd
s)
[mra
d]
Aperture 1 (external)
Aperture 2 (internal)
Distribution of main field direction in dipole apertures
0
2
4
6
8
10
12
14
16
18
20
-2.5 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 More
Field direction w.r.t. mean plane (MAG_ANGLE) (mrad)
N.
of d
ipol
e ap
ertu
res
AlstomAnsaldoNoell
Field direction: overall averageField direction: overall average
Average Field Direction wrt CM Mean Plane (MAG_ANGLE)(all measured magnets)
-0.80
-0.60
-0.40
-0.20
0.00
0.20
0.40
0.60
0.80
1.00
Alstom (28 magnets) Ansaldo (13 magnets) Noell (25 magnets)
Manufacturer
Fie
ld d
ire
cti
on
(m
rad
)
Aperture 1
Aperture 2
Average field direction (both apertures)
Unit Manufacturer Magnets tested
Magnets Out-of-spec
All magnets Within spec only Alstom 28 10 0.39 0.61 0.16 0.50 mrad Ansaldo 13 1 -0.22 0.36 -0.20 0.42 mrad Noell 25 2 -0.03 0.39 0.07 0.30 mrad All 66 13 0.11 0.48 0.06 0.41 mrad
Parallelism between aperturesParallelism between apertures
Manufacturer Magnets
tested Parallelism
(A2-A1) Unit
Alstom 28 0.05 0.31 mrad Ansaldo 13 0.04 0.14 mrad Noell 25 0.18 0.15 mrad All 66 0.10 0.22 mrad
Warm-cold correlationWarm-cold correlation
Warm-cold Field Direction Correlation
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
-0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
MAGDIR @ 300 K (mrad)
MA
GD
IR @
1.9
K (
mra
d)
SSW-DC (cold) / IPT Mole (warm)
SSW-DC (cold) / SSW-AC (warm)
Linear regression
Slope = 1.09 0.08 mrad/mrad
Offset = -0.31 0.05 mrad
Slope = 1.09 0.08 mrad/mrad
Offset = -0.31 0.05 mrad
Rotation of field direction vs. rotation of cryostatRotation of field direction vs. rotation of cryostat
main field direction in Ap. 1 of 3006 @ 300K(relative to initial cryostat position on test bench)
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0 5 10 15 20
longitudinal position (m)
loc
al f
ield
dir
ec
tio
n [
mra
d]
initial position (reference)
cryostat rotated by - 1 mrad
cryostat rotated by -2 mrad
cryostat rotated by -2 mrad, central jack +1.0 mm
cryostat rotated by -2 mrad, central jack + 1.5 mm
Avg field rotation = 1.01∙cryostat_rotation - 0.01 (mrad)Avg field rotation = 1.01∙cryostat_rotation - 0.01 (mrad)
Rotation of end covers vs rotation of cryostatRotation of end covers vs rotation of cryostat
Relative rotation of end covers vs relative rotation of cryostat (line between target T and target S)
-2.50
-2.00
-1.50
-1.00
-0.50
0.00
-2.50 -2.00 -1.50 -1.00 -0.50 0.00
cryostat rotation [mrad]
end
co
ver
rota
tio
n [
mra
d]
downstream
upstream
Avg end rotation = 0.99∙cryostat_rotation + 0.03 (mrad)Avg end rotation = 0.99∙cryostat_rotation + 0.03 (mrad)
Mechanical tilt of end platesMechanical tilt of end plates
Average end tilt wrt CM Mean Plane
-0.60
-0.40
-0.20
0.00
0.20
0.40
0.60
0.80
Alstom (4 magnets) Ansaldo (4 magnets) Noell (7 magnets)
Manufacturer
D9
-D1
1 li
ne
tilt
EN
DF
ID (
mra
d)
upstream
downstream
Alstom -0.14 ± 0.19 mradAnsaldo 0.02 ± 0.27
mradNoell 0.38 ± 0.22 mradAll 0.02 ± 0.22 mrad
ConclusionsConclusions
• Average field direction and parallelism error well within specifications
• Field rotation correlates well with cryostat tilt and cold mass end tilt
• Warm/cold correlation appears to be feasible within the prescribed tolerance. Larger sample needed to establish it more precisely
• Measurements suggest small systematic effects, different for each manufacturer, which may need to be investigated
• Further measurements should be done for:
- 1002, 1022, 3002: low accuracy of magnetic measurement- 1003, 1006, 1008, 2003: large change in GEOREF
• ID card values will be updated shortly