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Facility to coat the SPS magnets with carbon

Objective: coat at least 90% of the SPS with a carbon thin film with low secondary electron emission in order to mitigate electron cloud. Objects to coat: dipoles (MBB+MBA = 70%), Quadrupoles (QD+QF = 10%), LSS (10%), eventually SSS (10%). The pumping port shields shall also be coated.

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Facility to coat the SPS magnets with carbon

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  1. Objective: coat at least 90% of the SPS with a carbon thin film with low secondary electron emission in order to mitigate electron cloud. Objects to coat: dipoles (MBB+MBA = 70%), Quadrupoles (QD+QF = 10%), LSS (10%), eventually SSS (10%). The pumping port shields shall also be coated. Facility to coat the SPS magnets with carbon

  2. Objective: coat at least 90% of the SPS with a carbon thin film with low secondary electron emission in order to mitigate electron cloud. Objects to coat: dipoles (MBB+MBA = 70%), Quadrupoles (QD+QF = 10%), LSS (10%), eventually SSS (10%). The pumping port shields shall also be coated. Facility to coat the SPS magnets with carbon Quadrupoles , drift tubes for LSS and SSS, and pumping port shields will be coated in actual facility (b. 181-R-F12) (potential conflicts with NEG coating for LHC have not yet been analyzed) Surface cleaning is mandatory prior to coat. Two options: 1) wet cleaning; 2) plasma cleaning (validation foreseen for 2014).

  3. Production steps for each dipole: Dismount from SPS transport to coating lab Surface cleaning Transport To SPS coating installation Facility to coat the SPS magnets with carbon TE-VSC TE-MSC TE-MSC Production constrains: ~1000 magnets to be cleaned and coated in one year (LS2) => 6 / day. Coating systems required to assure such pace: 1) if wet cleaning 12; 2) if plasma cleaning 16. (two dipoles piled up per coating system). Surface requirements: 600 m2(+100m2 for storage); >18 tons crane. Close to BA3 or BA5. (avoid road transport and easy extraction from tunnel )

  4. Wet vs Plasma cleaning

  5. Coating system 16 meter Dipoles pilled up by two Pumping system + gas injection + plasma generator + step motor Structure to support graphite cathode And stainless steel anode (in case of plasma cleaning)

  6. 16 coating systems in parallel 32 meter 19 meter

  7. The prototype coating system (b.181-R-G12)

  8. The prototype coating system (b.181-R-G12)

  9. The prototype coating system (b.181-R-G12)

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