19 December 2006Eddy Jans Annual Scientific Meeting0 The advent of the VELO introduction sensors mechanics vacuum motion cooling PU-modules IP8 outlook

19 December 2006Eddy Jans Annual Scientific Meeting1 250 mrad 10 mrad VErtex LOcator introduction IP in the VELO

19 December 2006Eddy Jans Annual Scientific Meeting2 L = 2x10 32 cm -2 s 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

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

19 December 2006Eddy Jans Annual Scientific Meeting4 VELO detector half kaptons silicon sensors cooling pipes + cookies manifold

19 December 2006Eddy Jans Annual Scientific Meeting5 2 PileUp-stations R-sensors VELO detector half 21 VELO-stations R+  sensors 172 k strips Interaction 7 mm from Si high and non-uniform radiation dose - radiation hard Beetle frontend chip - radiation hard n-on-n sensor ≈100 cm

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

19 December 2006Eddy Jans Annual Scientific Meeting7

19 December 2006Eddy Jans Annual Scientific Meeting8  IP 15 mm between neighbouring and slightly overlapping modules thin, leak tight corrugated rf-foil

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

19 December 2006Eddy Jans Annual Scientific Meeting10  p < 5 mbar !! last week installed in VELO-vessel

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

19 December 2006Eddy Jans Annual Scientific Meeting12 Wake field suppressor mounted on VELO exit window

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

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

19 December 2006Eddy Jans Annual Scientific Meeting15 end pressures thus far without bake-out and without ion getter pumps: 4 x mbar pressures during venting p [mbar] 10 time p beam -p det. [mbar]

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

19 December 2006Eddy Jans Annual Scientific Meeting [mm] rf-foil VELO open 0. half-open VELO tracking LHC-beams crossing VELO closed [mm]

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

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

19 December 2006Eddy Jans Annual Scientific Meeting20

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

19 December 2006Eddy Jans Annual Scientific Meeting22 cooling plant CO 2 -part freon chiller

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

19 December 2006Eddy Jans Annual Scientific Meeting24

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

19 December 2006Eddy Jans Annual Scientific Meeting  m R sensorpitch adapters16 Beetle chips 8 layer hybrid integrated kapton tails

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.

19 December 2006Eddy Jans Annual Scientific Meeting28 The travel of the VELO from NIKHEF (April ’06) to IP8

19 December 2006Eddy Jans Annual Scientific Meeting29

19 December 2006Eddy Jans Annual Scientific Meeting30 LHCb pit now VELO

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