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Prototype Layout and Magnetic Measurements of MBXW001 Magnet for LHC Experiments

This document outlines the design and magnetic measurement results of the MBXW001 prototype magnet, intended for installation in the LHC. Key specifications include the symmetrical layout of IR1 (ATLAS) and IR5 (CMS), a flux density range of 0.08 to 1.48 T, and operational currents up to 830 A. With a weight of 11.5 T, the magnet features two coils of 48 turns of copper conductor. Magnetic field quality measurements using a Hall probe array are included, demonstrating field integral quality within acceptable limits. Measurements were conducted at CERN in May 2003.

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Prototype Layout and Magnetic Measurements of MBXW001 Magnet for LHC Experiments

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  1. MBXW MBXW 01 (prototype)

  2. IR1 and IR 5 Layout IP 1 IP5 D1 : 6 X MBXW 83.5 m 0 m 59 m Distance between the 2 beams : 19 mm IR 1 Left and Right are symmetrical IR 5 Left and Right are symmetrical

  3. MBXW Side view z

  4. Y X 2 coils of 48 turns Cu conductor section : MBXW Section view

  5. MBXW • 25 magnets will be installed in the LHC : - 12 magnets in the experimental IR 1 (ATLAS) - 12 magnets in the experimental IR 5 (CMS) - 1 magnet in the experimental IR 8 (LHCb) • Flux density : - operating : 0.08 to 1.38 T - ultimate : 1.48 T • Current : - Nominal at B= 1.48T : ~ 750 A - Ultimate: 830 A • Weight : 11,5 T

  6. MBXWmagnetic measurement • Magnetic measurement with a Hall probe array at BINP Field quality Hall probe X

  7. MBXW Field integral quality, in the good field region (+/-41 mm) at 1.38 T ( 750 A )   2 10-4at 0.08 T (not measurable)  510-4

  8. without corrected shims

  9. without corrected shims

  10. Magnetic Measurements of MBXW001 magnet (May 2003) at CERN- ABSOLUTE - 5 coils mole

  11. Magnetic Measurements of MBXW001 magnet (May 2003) at CERN - COMPENSATE - 5 coils mole

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