Resistive magnet measurements & coils, manufacture and calibration equipment

1. Resistive magnet measurements & coils, manufacture and calibration equipment Didier Cornuet & Juan Garcia Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

2. Overview Magnetic Measurements needs and activities: Alignment: axis & angles Local fields, harmonics Integral fields, harmonics… Instruments available Benches at our disposal and geographic locations Fabrication and Calibration laboratory and synergies Geometric measurements: Leica survey Proposals for future Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

3. Activities Magnetic measurements of resistive magnets Equipment and systems for all magnetic measurements : development, specification, procurement, evaluation. Coil winding and modules assembly & calibration. Associated reference magnets & facilities. SMA18 & SM18 field measurement equipment: development & manufacturing. MQ-MB factory magnetic measurement equipment & CERN reference systems. Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

4. Instruments Dipole Industry Magnetic Measurements (DIMM) Quadrupole Industry Magnetic Measurements (QIMM) Long shafts for MB (13 x 1.2 m) Long shafts for MQ ( 6 x 0.75 m) AC moles (warm & cold) Polarimeters Set of Hall probes (B3-B5, probe arrays) Single and Double Stretched Wire systems Numerous sets of search coils Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

5. Measurements for resistive magnets (I) They take place in two halls: 867-RH29, 6 Benches and 5 (6) pulsed Power supplies (from 250 A to 6 * 500 A). 867-RC07, Air conditioned room (160 m2) with one Power supply (600 A). Magnetic measurements of magnets for: Linacs, Booster, PS, AD, CTF3, SPS, LHC, CNGS, LEIR, CLIC and external labs. Magnetic conformity of repaired or rebuilt magnets Measurements of prototypes Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

6. Measurements of Resistive magnets (II) Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

7. Measurements stands for resistive magnets LINAC harmonic bench (DC quads, for pulsed quads no longer operational). Harmonic bench for large dipoles &quadrupoles Calibration bench for coils (up to 2 m long, also possible field maps for C type magnets ) Helmholtz and Gradhelm coils (surfaces and distances) Single stretched wire for small quads (not operational) 3D bench for field scanning PS bench for dipoles, quadrupoles and sextupoles (DC and pulsed modes) LHC harmonic bench SPS dipole bench SPS quadrupole bench Double stretched wire bench Field mapping bench (DC and pulsed mode) Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

8. Magnetic measurements of resistive magnets (prototypes and series samples) during 2005 MBW dipole for LHC PS spare unit without and with shims and new PFW End of series measurements of the 52 MQW quadrupoles 10 hor. and vert. corrector magnets for SPS and LHC Pulsed elliptic quadrupole for the PS gamma-jump 3 solenoids for LEIR Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

9. Lyre Side Cold Bore Tubes D11 AC Mole D10 Connection Side Tripod Leica Laser tracker Magnetic Alignment measurements MTM group own 2 Laser Trackers for survey AC mole for magnetic and mechanical axis (warm and cold) SSW for magnetic axis and roll angle Synergy with other groups having the same equipment Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

10. Activity of coil manufacture and calibration Performed in two labs: B.230 & I8 nearby Coil manufacture Assembly and micro connections Calibration in ref. dipole : surface and parallelism Calibration in ref. quadrupole: radii Moles and shafts assembly and their calibrations Maintenance of equipment Consultancy inside and outside CERN. Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

11. 50 mm 250 mm Winding Lab at Building 230 Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

12. Coil interconnection and cabling Example of an Interconnection scheme: 10 strand wire in a 20 strand connection plate 12 mm 4 mm Connection plates embedded in coil core, left: single wire, right: 20 strand wire 50 mm 10 mm Preparation for soft soldering of a 20 strand connector Signal cables connected to their coils All coils of a sector connected Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

13. Magnetic Calibration The laboratory: Reference quadrupole [1.5m] • Several reference magnets installed in former ISR tunnel, good stabilization in temperature Assembly Soft soldering Grinding 15m cryodipole Reference dipole [2.5m] Short reference quadrupoles [0.3m, 0.5m] Power supply for reference dipole Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

14. Magnetic Calibration (I8) Rotation support Integrators and PC Dipole Dipole reference magnet: • Effective aperture: l=2.5m, h=80mm, w=300mm • Field: 1T (stab.:10-5T), monitored continuously with NMR probe and periodically mapped • Field angle aligned to <0.1 mrad w/r gravity • Used for calibration of coil area, parallelism and absolute angle (up to 5 coils simultaneously) • Overall uncertainty: 2x10-4 (repeatab.: 5x10-5) NMR probe Lateral stroke Sensor (res. 10-3mm) Integrators and PC Quadrupole reference magnet: • Magnet aperture: l=1.5m, Ø 125mm, • Field gradient of 8.6 T/m (@ 480A) • Used for calibration of coil radii • (up to 5 coils simultaneously) • Overall uncertainty: 5x10-4 Quadrupole Rotation and centering support Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

15. Measuring Head Assembly (bldg 230) Prototyping and repair workshop: Adjustment table for Level meters Turning… Dynamic gluing table …milling… …drilling UV curing for coil gluing Workshop on Test Facilities and measurement equipment needed for the LHC exploitation

16. Proposals for future Consolidate 230 & I8 labs for fabrication & calibration. Unique facility to make coils. Move some benches from Prevessin (calibration, 3D, Linac, small SSW) Add to I8 functionality to measure middle size magnets or prototypes by improving infrastructure (repair of the crane rails, and better communication with B.181) Keep benches associated to big Power Supplies in Prevessin for PS and SPS Workshop on Test Facilities and measurement equipment needed for the LHC exploitation