1. C. Petrone and L. Walckiers 16.11.2015
Magnetic measurement main results of SESAME quadrupole and sextupole magnets
C. Petrone and L. Walckiers 1

2. Magnetic Measurements
Magnets measured:
All 33 Sextupoles from Cyprus (SC)
All 33 Quadrupole De-focusing (QD)
20 Quadrupoles Focusing (QF) (13 to be measured)
23 Sextupoles from Pakistan (SP) (10 to be measured)
Magnets measurement procedure:
Polarity checked (included the aux windings)
De-Gauss procedure before and after the magnetic measurement cycles
Pre-cycled three times from injection current to maximum current before any magnetic measurement

3. B2 for the quadrupoles System absolute calibrated w.r.t. SSW
σ = 0.08 % QD
B2 mean at 215 A : Tm
σ = 0.04 % QF
B2 mean at 250 A : Tm

4. Field angle for the quadrupoles
σ = 0.09 mrad QD
Angle mean at 215 A : mrad
σ = mrad QF
Angle mean at 250 A : mrad

5. Magnetic axis location repeatability : 0.020 mm
Magnetic axis QD and QF QD QF
σ = mm
σ = mm
Mean X : mm
Mean Y : mm
σ = mm
σ = mm
Mean X : mm
Mean Y : mm
Earth magnetic field effect corrected by using measurements at negative current
Magnetic axis location repeatability : mm

6. QD multipoles I=215 A b6 : -0.11 ± 0.15 units b10 : -0.94 ± 0.02 units
a3 : 0.14 ± 1.14 units
b4 : 0.88 ± 0.92 units
a4 : ± 0.18 units
b14 : 0.28 ± 0.01 units

7. QF multipoles I=250 A b6 : -0.06 ± 0.12 units b10 : -0.33 ± 0.02 units
a3 : ± 0.76 units
b4 : ± 0.32 units
a4 : ± 0.18 units
b14 : ± 0.01 units

8. B3 for the sextupoles σ = 0.09 % Cyprus B3 mean at 125 A : 0.0079 Tm
σ = 0.09 %
Cyprus
B3 mean at 125 A : Tm
σ = 0.06 %
Pak
B3 mean at 125 A : Tm

9. Field angle for the sextupoles
σ = 0.15 mrad
Cyprus
Angle mean at 125 A : -0.1 mrad
σ = 0.16 mrad
PAK
Angle mean at 125 A : 0.03 mrad

10. Magnetic axis sextupoles
Cyprus
Pakistan
σ = 0.02 mm
σ = 0.07 mm
Mean X : mm
Mean Y : mm
σ = 0.03 mm
σ = 0.08 mm
Mean X : mm
Mean Y : mm

11. Sextupoles b9 and b15 multipoles I=125 A
Cyprus
Pakistan
b9 : 0.44 ± 0.13 units
b9 : 0.78 ± 0.06 units
b15 : ± 0.01 units
b15 : ± 0.01 units

12. Sextupoles not allowed multipoles I=125 A
Cyprus
Pakistan
Units
Std
b4 (units)
-0.50
1.45
a4 (units)
-0.83
1.47
b5 (units)
0.80
0.89
a5 (units)
-0.02
0.72
b6 (units)
0.03
0.49
a6 (units)
0.46
0.16
b7 (units)
0.19
a7 (units)
-0.01
0.14
b8 (units)
0.00
0.06
a8 (units)
0.04
Units
Std
b4 (units)
0.21
1.43
a4 (units)
0.37
1.40
b5 (units)
0.97
1.15
a5 (units)
0.36
1.24
b6 (units)
-0.26
0.88
a6 (units)
0.48
0.14
b7 (units)
0.18
0.27
a7 (units)
-0.05
0.25
b8 (units)
0.00
0.04
a8 (units)
-0.01
0.06

13. Frequency response of correctors