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19 December 2006Eddy Jans Annual Scientific Meeting0 The advent of the VELO introduction sensors mechanics vacuum motion cooling PU-modules installation @ IP8 outlook
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19 December 2006Eddy Jans Annual Scientific Meeting1 250 mrad 10 mrad VErtex LOcator introduction IP in the VELO
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19 December 2006Eddy Jans Annual Scientific Meeting2 L = 2x10 32 cm -2 s -1 10 12 b-hadrons/year displaced vertex at l ≈1 cm need good impact parameter resolution detector halves: - retractable by 30 mm due to beam excursions during injection & tuning - adjustable by ± 5 mm in x&y due to variations in IP from fill to fill displaced vertex l primary vertex
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19 December 2006Eddy Jans Annual Scientific Meeting3 VErtex LOcator Silicon sensors Vacuum vessel rf-box rectangular bellows exit window wake field suppressor ~1 m kaptons
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19 December 2006Eddy Jans Annual Scientific Meeting4 VELO detector half kaptons silicon sensors cooling pipes + cookies manifold
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19 December 2006Eddy Jans Annual Scientific Meeting5 2 PileUp-stations R-sensors VELO detector half 21 VELO-stations R+ sensors 172 k strips Interaction Point @ 7 mm from Si high and non-uniform radiation dose - radiation hard Beetle frontend chip - radiation hard n-on-n sensor ≈100 cm
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19 December 2006Eddy Jans Annual Scientific Meeting6 (radial strips with stereo angle) sensors 300 m thick 2048 strips n-on-n, diffusion oxygenated float zone double metal layer Micron Ltd. 42 mm R pitch: 38 → 103 mpitch: 40 → 78 m readout with 16 Beetle chips analog pipeline and readout full readout in 900 ns 19 ns peaking time S/N ≈18/≈21 for R/ 7 mm
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19 December 2006Eddy Jans Annual Scientific Meeting7
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19 December 2006Eddy Jans Annual Scientific Meeting8 IP 15 mm between neighbouring and slightly overlapping modules thin, leak tight corrugated rf-foil
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19 December 2006Eddy Jans Annual Scientific Meeting9 super plastic pressing of 300 m Al foil with hot gas welding into a vacuum tight box rf-box Chiel Bron, Frans Mul, Erno Roeland, Hans de Vries 30 mm
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19 December 2006Eddy Jans Annual Scientific Meeting10 p < 5 mbar !! last week installed in VELO-vessel
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19 December 2006Eddy Jans Annual Scientific Meeting11 between (movable) rf-boxes and beam pipe 75 m CuBe foil wakefield suppressors Erno Roeland, Dimitri John, Martin Doets
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19 December 2006Eddy Jans Annual Scientific Meeting12 Wake field suppressor mounted on VELO exit window
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19 December 2006Eddy Jans Annual Scientific Meeting13 vacuum Luc Jansen, Martin Doets, Fred Schimmel 2 roughing pumps 3 turbo pumps 2 ion getter pumps 13 valves 1 bypass valve 6 membrane switches 11 Pirani gauges 7 Penning gauges
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19 December 2006Eddy Jans Annual Scientific Meeting14 control implemented in a PLC - evacuating & venting while pressure difference between beam and detector volume < 5 mbar - bake out procedure GUI in PVSS UPS system M V1 V2
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19 December 2006Eddy Jans Annual Scientific Meeting15 end pressures thus far without bake-out and without ion getter pumps: 4 x 10 -8 mbar pressures during venting p [mbar] 10 time p beam -p det. [mbar] 0 400 800 1200 0 4 -4
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19 December 2006Eddy Jans Annual Scientific Meeting16 motion control implemented in a PLC readout via resolvers reproducibility < 10 m 3 d.o.f.: XR, XL and Y GUI in PVSS software and hardware limits UPS system motion Piet de Groen, Martin van Beuzekom, Fred Schimmel
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19 December 2006Eddy Jans Annual Scientific Meeting17 0 15 -1530 -30 [mm] rf-foil VELO open 0. half-open VELO tracking LHC-beams crossing VELO closed 15 -15 30 -30 -45 45 [mm]
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19 December 2006Eddy Jans Annual Scientific Meeting18 cooling design&construction: Bart Verlaat, Berend Munneke, Erno Roeland, Dimitri John, Marco Kraan, Martin Doets control: Luc Jansen, Martin van Beuzekom, Piet de Groen, Jaap Stolte, Ann Van Lysebetten, Jaap Kuyt, Auke-Pieter Colijn 2-phase gas R404a chiller 2-phase condenser evaporator 60 m concentric tube pump restriction accumulator shielding wall coolant: two-phase CO 2 liquid VELO detector cooling plant
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19 December 2006Eddy Jans Annual Scientific Meeting19 cooling blocks vacuum feed trough liquid inlet vapor outlet PT100 Interface board PT100 cables cooling pipes inner =0.5mm evaporator
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19 December 2006Eddy Jans Annual Scientific Meeting20
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19 December 2006Eddy Jans Annual Scientific Meeting21 □ mass flow mod17 Mod25 evaporator total mass flow [g/s] temperature [ o C] heat load 1.4x nominal presumably annular gas+liquid flow nominal flow = 12 g/s dry out
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19 December 2006Eddy Jans Annual Scientific Meeting22 cooling plant CO 2 -part freon chiller
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19 December 2006Eddy Jans Annual Scientific Meeting23 88 analog differential pairs per set reliable after 10k movements of 35 (5) mm x (y) sandwiched between 2 power planes rolled annealed copper of 17 m traces 150 m L=75 cm GSP Ltd. kaptons Jan Koopstra, Martin van Beuzekom, Sander Mos, Marco Kraan
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19 December 2006Eddy Jans Annual Scientific Meeting25 4 upstream modules with R-sensors uses digital readout of Beetle-chips vetoes BXs with multiple PV’s Pile-Up Wilco Vink, Sander Mos, Martin van Beuzekom, Leo Wiggers, Joop Rovekamp 4 PU-hybrids 8 optical Tx-boards 4 vertex processing boards 1 output board L0DU 125 Gb/s under construction
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19 December 2006Eddy Jans Annual Scientific Meeting26 300 m R sensorpitch adapters16 Beetle chips 8 layer hybrid integrated kapton tails
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19 December 2006Eddy Jans Annual Scientific Meeting27 LHCb pit 4 years ago VELO destination Installation in IP8 Frans Mul, Luc Jansen, Piet de Groen, Jaap Stolte, Martin Doets, E.J.
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19 December 2006Eddy Jans Annual Scientific Meeting28 The travel of the VELO from NIKHEF (April ’06) to IP8
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19 December 2006Eddy Jans Annual Scientific Meeting30 LHCb pit now VELO
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19 December 2006Eddy Jans Annual Scientific Meeting31 outlook for 2007 perform vacuum tests with rf-boxes installed construct + test + install + test cooling plant finish LV, HV, analog, and control cabling, interlocks system assemble detector halves install detector halves in VELO-vessel commission detectors evacuate ……… beam on move VELO in start DAQ off we go
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