TREX meeting 27 th of November 2019 VELO

TREX meeting 27 th of November 2019 VELO vacuum system status On behalf of the VSC – Josef Sestak

Overview of the activities Additional sectorisation of the IP 8. X; q Activities motivated by VELO upgrade; q Activities motivated by SMOG 2; q Already presented, discussed and approved: o TREX #19; o LHCb Technical Committee 12/2018; o IWG (multiple times);

Additional sectorisation • Existing sectorisation of IP 8. X (RB 84 – RB 86); 9/24/2020 Document reference 3

Additional sectorisation • Existing sectorisation of IP 8. X (RB 84 – RB 86); 9/24/2020 Document reference 4

Additional sectorisation • Prepare UX 85 space reservation upstream of the VELO; • Removal of the angle valve GV 302; • New sector valve as close to IP 8 as possible; • Aperture issue (valve ID 63 – VELO ID 80; 9/24/2020 Document reference 5

Additional sectorisation • Aperture – we were lucky; VELO elliptical head has been modified during the production (Nikhef – Thermo). 9/24/2020 Document reference 6

Additional sectorisation 63 mm 54 mm • Old transition removed and geometry reconstructed • New transition (VELO 54 mm – Sector valve 63 mm) • Produced and available for installation in 2020 9/24/2020 Document reference 7

Additional sectorisation Sector valve VVGST ID 63 Standard module ID 80/63 with RF contact Gate valve ID 150 Transition chamber ID 63/54 Hi. Pace 700 turbo-molecular pump • • New configuration increase the available space; Smooth aperture transition; VELO protection cover needs to be modified; Equipment available for installation in 2020. 9/24/2020 Document reference 8

Activities motivated by VELO upgrade • • Extension of the VELO differential pressure control unit; Modification of the GIS lines; Additional pressure-switch Spare pressure switches to be ordered Design and production of two new vacuum hubs Production ongoing – will be ready by beginning of 2020 9/24/2020 Modification of the GIS lines to make space for CO 2 cooling system • To be scheduled (Q 1 2020) Document reference 9

Activities motivated by SMOG 2 Design and production of custom flange for Storage cell connection Production ongoing – will be ready by beginning of 2020 All-metal right angle UHV valve (DN 10) – Storage cell injection Equipment available for installation Custom DN 10 capillary – production by Q 1 2020 Current SMOG inlet (will be used for connection after the LS 2) Instrumented pumping group q Penning + Pirani gauge; q PV 503 – SMOG injection; q Connection to Neon injection line; q Connection to SMOG injection line; 9/24/2020 Document reference 10

Activities motivated by SMOG 2 Expected by 2020 Installation of the GFS line; • Installation of the GFS table; • • Position on the balcony next to the current GIS; GIS table needs some small modifications (BVO); Bypass from the SMOG to GFS; • Run 3 Feasible during the YETS period. 9/24/2020 Document reference 11

Additional activities Installation of the RGA with long-range cables; • Inspection of the components related with corrosion issue on the VELO vacuum system; • Relocation of the calibrated Bayard-Alpert gauge closer / on the VELO (ECR LHC-VGI-EC-0001). • 9/24/2020 Document reference 12

Thank you for your attention 9/24/2020 Document reference 13