SR NSLS prototype magnets. Dipoles 90 mm aperture dipole Pole Ends will be matched to achieve the...
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Transcript of SR NSLS prototype magnets. Dipoles 90 mm aperture dipole Pole Ends will be matched to achieve the...
Dipoles90 mm aperture dipole
Pole Ends will be matched to achieve the magnetic field quality (1.5.10-4)
Dipoles
Pole Ends will be matched to achieve the magnetic field quality (1.5.10-4) and equivalent magnetic field integrals (relative to 90 mm aperture dipoles)
35 mm aperture dipole
Dipoles90 mm aperture dipole
Number of magnets 8
Bending angle, deg 45
Bending radius, mm 1528
Gap, mm 50 ± 0.02
Field range, T up to 1.5
Good field area, mm2 60 x 36
Homogeneity dB/B 2.5x10-4
Stabolit 70
Stabolit 20
Dipoles90 mm aperture dipole
Magnetic field in gap
-0.020%
-0.015%
-0.010%
-0.005%
0.000%
0.005%
0.010%
0.015%
0.020%
-0.03 -0.02 -0.01 0 0.01 0.02 0.03X, m
dB
/B
Dipoles
..\..\..\NSLS SR tender\out documents\dipole\main info\Attachment 3 (Dipoles_technological equipments).doc
Magnetic measurement
The carriage with the Hall sensors (1 – the temperature sensor, 2 – the
Hall sensors, 3 –the NMR probe)
The carriage with Hall sensors in the guide mounted in the magnet aperture
Parameters B/B I /I
Geometry-dependent errors (orientation of the sensors in the carriage plane, alignment of the guide relative to the magnet, errors caused by the carriage transportation mechanism)
1.5.10-5 1.7.10-5
Time instability of *: The feed current of the magnets The feed current of the Hall sensors
2.10-5
10-5
1.8.10-6
0.9.10-6
Temperature instability 2.4.10-5
Accuracy of calibration of the Hall sensors 4.5.10-5
Noise of the electronics 4.4.10-5 4.0.10-6
Resultant errors of the measurements 7.2.10-5 6.2.10-5
The accuracy of the magnetic measurements.
Dipoles
Yoke with reference surface plate inside the stacking fixture
Yoke with face plates inside the stacking fixture.