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Polarity Issues at the Inner Triplets and DFBXs

Ensure correct polarity for multipole correctors & magnet assemblies in particle accelerators to maintain optical function. Electrical layout instructions provided for connection terminals and lead indices inversion.

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Polarity Issues at the Inner Triplets and DFBXs

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  1. Polarity Issues at theInner Triplets and DFBXs

  2. Electrical Layout Drawing Inner Triplet

  3. Normal Position of the Connection Terminals • If a multipole corrector within the magnet assembly has its connection terminals facing downstream of Beam 1, and if the magnet's optical function changes (depending on the multipole order), then the terminals are re-labeled.

  4. Normal Position of the Connection Terminals * * * • If an entire magnet assembly is be installed in the LHC tunnel turned by 180 deg. around the vertical axis, then the naming of the connection terminals A and B are not changed. If the magnet's optical function changes, then the polarity is changed on the warm side (magnet is marked with a star in the layout).

  5. Magnet Polarities in the Insertion Regions ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲ ▲

  6. Polarity Error of MCOX,MCSSX (Everywhere) Fixed on the Patch Pannell, no impact on QPS (120 A)

  7. Connection Board at DFBX A A A A A A A B B B B B B B

  8. Connection Board at DFBX Polarity errors in MCSSX, MCOX in Q3 A B A A B A A A B B B B A B

  9. Connection Board at DFBX Read ! 686210 A B A A B A A A B B B B A B

  10. Cable Crossing MQSX in DFB (Everywhere) Interface to QPS on Proximity Equipment Fixed on the Patch Pannell, but impact on the QPS, mended at sotware interface

  11. Pin out 120 A Connectors (Everywhere) 3 2 11 2 1 2 1 2 3 Fixed in Connector on the Proximity Equipment side

  12. MCSX Polarity (only in DFBXG (8L) 3 2 11 2 1 2 1 2 3 Fixed at Patch Pannell no impact on QPS, Vtap Routing corrected in Connector

  13. Everywhere • Main circuit RQX: inversion of the current lead indices (EDMS 875243) with respect to the LHC reference DB Electrical Layout Assembly in tunnel

  14. Inversion of Lead Indices RQX (Everywhere) 1 2 3 2 11 2 3 4 1 2 1 2 3 Fixed at Patch Pannell

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