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TREX meeting 27th of November 2019
VELO vacuum system statusOn behalf of the VSC – Josef Sestak
Overview of the activities
Additional sectorisation of the IP8.X;
Activities motivated by VELO upgrade;
Activities motivated by SMOG 2;
Already presented, discussed and
approved:
o TREX #19;
o LHCb Technical Committee 12/2018;
o IWG (multiple times);
Additional sectorisation
• Existing sectorisation of IP8.X (RB84 – RB86);
11/27/2019 Document reference 3
Additional sectorisation
• Existing sectorisation of IP8.X (RB84 – RB86);
11/27/2019 Document reference 4
Additional sectorisation
• Prepare UX85 space reservation upstream of the VELO;
11/27/2019 Document reference 5
• Removal of the angle valve GV302;
• New sector valve as close to IP8 as possible;
• Aperture issue (valve ID63 – VELO ID80;
Additional sectorisation
• Aperture – we were lucky; VELO elliptical head has
been modified during the production (Nikhef – Thermo).
11/27/2019 Document reference 6
Additional sectorisation
11/27/2019 Document reference 7
• Old transition removed and geometry reconstructed
• New transition (VELO 54mm – Sector valve 63mm)
• Produced and available for installation in 2020
54mm 63mm
Additional sectorisation
11/27/2019 Document reference 8
Gate valve ID150
Sector valve VVGST ID63
HiPace 700 turbo-molecular pump
Standard module
ID80/63 with RF contact
Transition chamber ID63/54
• New configuration increase the available space;
• Smooth aperture transition;
• VELO protection cover needs to be modified;
• Equipment available for installation in 2020.
Activities motivated by VELO upgrade
• Extension of the VELO differential pressure control unit;
• Modification of the GIS lines;
11/27/2019 Document reference 9
Additional
pressure-switch
Design and production of two new vacuum hubs
Production ongoing – will be ready by beginning of 2020
Spare pressure
switches to be
ordered
Modification of the GIS lines to make
space for CO2 cooling system
• To be scheduled (Q1 2020)
Activities motivated by SMOG 2
11/27/2019 Document reference 10
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 (DN10) – Storage cell injection
Equipment available for installation
Custom DN10 capillary – production by Q1 2020
Instrumented pumping group
Penning + Pirani gauge;
PV503 – SMOG injection;
Connection to Neon injection line;
Connection to SMOG injection line;
Current SMOG inlet
(will be used for connection after the LS2)
Activities motivated by SMOG 2
• 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;
• Feasible during the YETS period.
11/27/2019 Document reference 11
Expected by 2020
Run 3
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).
11/27/2019 Document reference 12
Thank you for your attention
11/27/2019 Document reference 13