TPB coatings at TE-VSC-SCC Wil Vollenberg CERN TE-VSC-SCC ; WA 104 weekly meetingWil Vollenberg Co-workers: Pedro Costa Pinto ; Mauro Taborelli ; Benoit Teissandier

Contents: - Coating activities at TE-VSC-SCC - our experience in TPB coatings - our commitment in WA104 project Wil Vollenberg ; WA 104 weekly meeting

DC Magnetron sputtering planar configuration Wil Vollenberg ; WA 104 weekly meeting

DMS DC Magnetron sputtering planar configuration Ø 600 mm After bake: 2*10 -9 mbar 2 magnetrons Ø 150 mm (3 DC cathodes) up to 5 objects Ø120 mm: +/- 10 % Flexibility Wil Vollenberg Equipment in our labs ; WA 104 weekly meeting

Examples DMS Wil Vollenberg Equipment in our labs NEG on MCP B 4 C on mylar for nTOF ; WA 104 weekly meeting C coating on electrodes for low SEY Nb coating for HIE-Isolde Tuning plates

DC Magnetron sputtering planar configuration Ø 1450 mm !! No Bake P limit = 5*10 -7 mbar 2 magnetrons Ø 150 mm rotated object holder Ø1200 mm: +/- 10 % Flexibility Wil Vollenberg Equipment in our labs ; WA 104 weekly meeting

Examples MP1500 Wil Vollenberg Equipment in our labs NEG on foils for WITCH NEG on electrodes Gas ionisation BPM Nb on Cavity Asacusa Cu conductive coating TCDS ; WA 104 weekly meeting

Magnetron DC Plasma coating in cylindrical configuration Wil Vollenberg ; WA 104 weekly meeting

DC Diode cylindrical configuration RF ceramic windows (LEP-LHC-ESRF) Pick-ups (CTF3 – linac 2) Wil Vollenberg Equipment in our labs ; WA 104 weekly meeting

LSS coating system 3mm wires of Ti, Zr and V Solenoid L=8m  =60cm manifold Extensions + chambers From: Pedro Costa Pinto ; WA 104 weekly meeting

Our experience in TPB coating: - end 2007 /begin 2008 first TPB tests for ICARUS / WARP - by spray-technique or evaporation - evaporation in units of PH division - work done by “surface and coating” section. Wil Vollenberg ; WA 104 weekly meeting

d Wil Vollenberg x-tal sample shutter Mo boat Volume tank 50 l Turbo pump: 300 l/s P limit = 1.5*10 -7 Torr (24 h pumping) Deposition rate: 1 µg/cm 2 /s P during coating: below Torr Sample production 3*3 cm 2 P.E. foils / quartz Delta mass => density ; WA 104 weekly meeting Ø 30 cm 26 cm COATING SET-UP

Sample TPB coating : - Samples: Mylar foil and quartz plates - TPB 110 – 1460 µg/cm 2 Wil Vollenberg ; WA 104 weekly meeting

Results TPB coating (F.P.): on mylar samples 3*3 cm µg/cm 2 : p.e / keV µg/cm 2 : p.e / keV µg/cm 2 : p.e / keV p.e. : photo electron / keV !? 2015: tests are ongoing !! => Maura Wil Vollenberg ; WA 104 weekly meeting

Sample TPB coating : - SEM: for 110 µg/cm 2 : not continuous layer for thicker layers: O.K. - SEM after thermal cycles (liquid Nitrogen) up to 5 cycles: no change in morphology neither peel off observed Wil Vollenberg ; WA 104 weekly meeting

2015 TPB coatings for WA104 ICARUS: according to commitment: EDSM : collaboration of TE-VSC: - pumping system - support during re-installation - technical guidance during commissioning: testing / prototyping - technical assistance and quality assessment during production phase. Wil Vollenberg ; WA 104 weekly meeting