14 June 2007 VELO Eddy Jans 1

Recent VELO-installation++ activities

June 14, 2007

• Potmeter calibration• Bake-out• Cabling & Commissioning

14 June 2007 VELO Eddy Jans 2

Potmeter calibration

Fred Schimmel has written PVSS-code to do the job:• buitengebied: simultaneously XA: 28 2 mm

XC: -28 -2 mmstep , default =2 mm

• binnengebied: XC=-10; XA= 10 -4.5 mm, step , default =1 mmXA=10; XC= -10 4.5 mm, step , default =1 mm

• y-calibration XA=2, XC=-2, Y= -4.5 4.5 -4.5 mmstep , default =0.5 mm

(See next talk by HdV)Limits, steps, etc. OK ??

14 June 2007 VELO Eddy Jans 3

Bakeout of VELO-tank & LHCb-beampipeEverything (=beam pipe, neon injection line, flanges of VELO-tank, 2 ion getter pumps) equipped with heaters, isolation and thermocouples by AT-VAC.

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Neon injection system on balcony

Bake out campaign: from 14h00 on Wednesday June 6 till 17h00 on Tuesday June 12

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Temperature profile

VELO @ 120oC

VELO @ 150oC

Test bakeoutRF-boxes

BakeoutRF-boxes

VELO @ 100oC

VELOcooldown

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Pressure profile

VELO to 120oC

VELO to 150oCBakeoutRF-boxes

unvoluntary air injection

(see plots HdV)

startup of ion getter pumps

VELO to 100oC

beam

det.

VELO cooldown

10-10

10-8

10-6

10-4

14 June 2007 VELO Eddy Jans 9

System is presently being vented with ultra-pure Neon.

Bypass valve may NOT be opened, i.e. NO movements allowed.

System will be kept “locked”, i.e. no neon supply and no balancing of pressures in beam and detector volumes.

End pressures:beam@VELO: 5x10-10 , beam@MUON: 2x10-11 VELO-detector: 3x10-8 mbar

14 June 2007 VELO Eddy Jans 10

Cabling & Commissioning• All HAPTAS temperature cables are connectorized by PdG + JS.• Connectorizing of analog cables by INEO in D3 is ongoing, till end July.• HV is almost finished• LV has not started yet

• First crate with TELL1’s installed in D3 and configured.• First crate with control boards installed on P1.• Control + readout of one VELO-slice this week.• Then readout of a dummy module with full DAQ-chain.

14 June 2007 VELO Eddy Jans 11

What’s next, apart from everything else ??

• finish one detector half completely• perform turn-over test with 2 cranes• organize transport from Meyrin IP8 + through shaft• prepare area (extra platform, store cables, clean, etc.) • open VELO-tank• install fitting frame• measure• remove fitting frame• install detector half• flush with dry air (how ?) and measure IV-curves or• evacuate, measure IV-curves, vent with Neon

• finish PLC-coding motion system• ELOG has moved to the following CERN Web-site http://lbweb01.cern.ch:8080