1. LHCb CO 2 cooling meeting Burkhard Schmidt – May 20, 2015 1

2. TRACI V1 for UT tests The TRACI V1, originally build for the LHCb VELO, has been re-commissioned. – The cooling power is 100-200W, depending on the set temperature (-20 o C to -10 o C). It has been shipped to Milano and arrived finally yesterday. – A handle got slightly bend and tests on tightness need to be done. – It will allow our Milano colleagues to make thorough tests of up to 2 staves.

3. Development and definition of evaporator systems I.Investigation of a micro-channel substrate based evaporator 1.Commissioning of the TRACI AIDA cooling station for the test-purposes √ 2.Use Snake 1for initial micro-channel performance studies √ 3.Preparation of Snake2 prototype micro-channel substrates and √ 4.Soldering /clamping of connectors to the micro-channel substrate ? 4.Performance measurements with Snake 2 ?  Work done by Pawel, Jan et al.  we have some delay (maybe not too critical) 3

4. 4 New Building Projects at Point 8 A B C D A B C New LHCb Control Room ( ~ 220 m 2 ) + Meeting Room (~ 140 m 2 ) + Offices (~ 80 m 2 ) + new LHC Cryogenic Control Room (~ 55 m 2 ) + Technical rooms (~ 120 m 2 ) - 3 floors (lift 5-6 people) New LHCb Storage Hall – 112 m 2 – crane 7.5 t (for replacing 156 building at Meyrin) New LHCb Assembly Hall & Storage - roughly 485 m 2 – crane 30 t (for replacing hall 156) D Location of the future LHCb servers in containers. E.PEREZ-DUENAS & D.LACARRERE 6 June 2013

5. Status and Plans Cooling specifications: Still waiting for an update of VELO specs. Comments given to updated UT specs.  Let us try to get this out of way asap. Development and definition of evaporator systems: Work in progress.  Check today where we stand with respect to the work plan Space in building 20-R-028 now available for CO 2 cooling tests, 20-R-024 has also been freed meanwhile. P&ID document & functional analyses: Work will start when basic issues related to the evaporators are clarified, hopefully by June.  The aim is still to have the cooling EDR in October 5

6. Backup 6

7. 2014 – Q34: Requirement document by VELO and UT 2015 – Q12: Development and definition of evaporator systems – Q23: Concept P&ID Preliminary sizing Control philosophy Redundancy approach – Q3: P&ID document & functional analyses – Oct 2015: Cooling EDR – Q4 start of design 2016 – Q123 Detailed 3D design of hardware Evaporator, junction box, transfer line, cooling plants – May 2016: Cooling PRR junction box, transfer line – Oct 2016: Cooling PRR cooling plant. – Q4 Production of transfer line and junction box 2017 – Q1 Transfer line and junction box installation (EYETS, 19 weeks) – Q1234 Production of the cooling hardware 2018 – Q12 cooling system installation in UXA (preferred place: A-side alcove) – Q234 Cooling system over junction box commissioning – Q3 start of LS2 – Q4 Removal of current VELO and TT 2019 – Q2 Upgrade VELO and UT installation – Q34 Detector commissioning with cooling – Q4 end of LS2 Updated Schedule Comments:  The schedule is driven by – the LHC schedule, – the LHCb upgrade plan and – the availability of resources in PH-DT: Design effort in 2015/2016 Construction 2017 Installation and start of commissioning in 2018 7

8. Cooling plant location Prefered Location: Alcove PZ85 (VELO side) – About 25-30m 2 are available and easy to access. – Area needs to be equipped with power (EXD, EBD, ESD), network, primary cooling – poor ventilation  Despite some drawbacks, this seems to be the best option. – Additional advantage: The transfer line towards the detector would be straight. Passing the shielding wall looks not too complicated. 8

9. Development and definition of evaporator systems II.Design and test of a micro-channel substrate based evaporator for the LHCb VELO 1.address the issues in relation to interconnection and distribution: The design of the evaporator needs to be done from and to the manifold. Arc-welding of pipes between the manifold and the detector modules is not possible ones the electronics are mounted on the module 2.Proper dimensioning of the in- and outlets connecting the detector to the manifold 3.critical safety aspects (the VELO is operated in the secondary LHC vacuum) Safety issues in case of micro-leaks need to be addressed in a coherent way, taking into account that the advantages and disadvantages of safety valves, and the maximum vacuum pressure tolerable for the thinner RF-foil.  Hopefully more input today … 9