Progress report on coatings for SPS-U S.Calatroni, P.Chiggiato, P.Costa Pinto, M.Taborelli, I.Wevers, C.Yin Vallgren, H.Pedroso-Marques, W. Vollenberg.

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Presentation transcript:

Progress report on coatings for SPS-U S.Calatroni, P.Chiggiato, P.Costa Pinto, M.Taborelli, I.Wevers, C.Yin Vallgren, H.Pedroso-Marques, W. Vollenberg Status of liner coatings Testing programme Proposal for installation Status of SPS dipoles coating bench SPS-U Sergio Calatroni

Liner status – lab testing SPS test with liners: –Old 2008 liner with carbon coating, exposed to air during shutdown –Stainless steel liner for reference –New liner with rough carbon coating (zirconium underlayer) –A new slot is available. Proposal (to be discussed): carbon coating on getter underlayer Sample in C-magnet: –New sample holder being prepared SPS-U Sergio Calatroni

Work is in progress, we have to understand some issues related to a-C layer uniformity and coating temperature SPS-U Sergio Calatroni

Test on dual magnetron system, bldg 101 C source Ti source samples SPS-U Sergio Calatroni

Ageing with Ti underlayer (getter for H 2 ) 7 weeks in air 3 weeks in air standard Ti underlayer SPS-U Sergio Calatroni 4 days in air Continuous Ti underlayer

Proposal for 4 th liner Produce a NEG TiZrV underlayer on a liner Assemble it in C coating system, activate NEG to pump H 2 and perform standard carbon coating Test samples in parallel SPS-U Sergio Calatroni

MBB prototype test MBB cross section; L=300mm; 2 rectangular carbon cathodes; Tested in LSS solenoids (B=190 Gauss) SPS-U Sergio Calatroni B field

MBB prototype test MBB cross section; L=300mm; 2 rectangular carbon cathodes; Tested in LSS solenoids (B=190 Gauss) SPS-U Sergio Calatroni

SPS-U Sergio Calatroni

Cross section of the liner L1 L2 R1 R2 Mid Saved for aging Sent to SEM for thickness measurement δ initial onStStL1L2Mid CAr9 – MBB CAr10 – MBB CNe31 – MBB nm630 nm SPS-U Sergio Calatroni After 39 days in air: 1.07

SPS-U Sergio Calatroni

MBB coating bench in bldg. 867 SPS-U Sergio Calatroni

SPS-U Sergio Calatroni