Progress report on coatings for SPSU

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Progress report on coatings for SPSU
Coating in the configuration E//B Situation for
coating of SPS magnets during suhtdown
S.Calatroni, P.Chiggiato, P.Costa Pinto,
M.Taborelli, I.Wevers, C.Yin Vallgren,
H.Pedroso-Marques
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Sample produced with E//B same geometry as MBA
magnet
Mini-setup for testing of MBA geometry
MBA chamber cross section
Graphite rods
B
Coil for magnetron sputtering in bdg 181
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First part of coating
Second part
active cathodes
active cathodes
-
-
-
-
E
E
E
E
B
B
Aim create a E-component ?B (magnetron effect is
there only in this case) to increase the path of
electrons and effectiveness of ionization
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CAr_7 in E//B setup
Main problem very slow deposition rate (30h)!
Possibly cured with floating rods instead of
grounded
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Design for the MBB version of coating
instrumentation
Courtesy of G.Foffano
Other configuration with bars instead of round
rods is also designed
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SPS Magnet coating for test

• -Last mechanical parts for coating of MBA
  geometry (as the non- radioactive prototype we
  have in 181) from the CERN workshop are
  scheduled for 30/1.
• Drawing for parts specific to MBB almost ready
• - mini-setup for MBB geometry already tested the
  coating rete is higher than for the MBA case
• Next
• -coating of prototype MBA with liner will be
  skipped
• -coating of of MBB with liner will be done for
  testing in Bdg 867
• Cleaning and coating of MBB magnets in Bdg 867
  (week 10 according to present planning!)
• Two possible scenarios for week 11(-12)
• -Minimum coat one MBB magnet
• Maximum coat 3 MBB magnets