25 January 2007 VELO sub-projects

Eddy Jans 1

VELO-meetingJanuary 25, 2007

• Sub-projects:• SX8-2.003 & SX8-2.004• connectorize cooling cables• alignment procedure• motion• test bake out procedure• turn over project• P-project• VELO vacuum commissioning

• LHCb installation planning• summary + timelines

25 January 2007 VELO sub-projects

Eddy Jans 2

clean up SX8-2.003&4Spaces 2.003 and 2.004 are future storage, repair and

working places for the whole VELO + PU communities.

With other people and parts/equipment approaching soon, our stuff needs to be reorganized/cleaned up.

Estimated time: 0.5 manweek.

25 January 2007 VELO sub-projects

Eddy Jans 3

•22 Jan 16 Feb:- pull long-distance (RB84 D3) analog cables by

INEO - “simultaneously” connectorize D3-side

• 19 Feb 23 Feb:- pull control cables (RB84 balcony)

• 26 Feb 2 Mar:- pull HV cables (RB84 D3)

Cabling

Cooling cables still need to be connectorized at both ends,i.e. RB84 and C3.

Estimated time: 2*1 manweek.

25 January 2007 VELO sub-projects

Eddy Jans 4

AlignmentCentre FrameFiducial Marks

Alignment procedure uses 5 fiducialpoints on each side of center frame.

However, these are soon not visible anymore due to the repeater crates, mounted on the detector hood.

25 January 2007 VELO sub-projects

Eddy Jans 5

Solution:Install new alignment pointsabove and below the existing ones.

Watch out that the analog cable supporting frame is not in the way also.

Estimated time: design: 1.5 mwconstruction: 1.5 mwimplementation: 2*0.5 mw

25 January 2007 VELO sub-projects

Eddy Jans 6

MotionIncreasing expertise with the system has revealed the necessity to take a few additional safety measures.Partly to be implemented in the PLC, partly in the PVSS application. • moving both XL and XR in the same direction from a position in which XL=-XR, needs special precautions.• implement the possibility to stop the stepper motor when really necessary (moving wrong way based on pot. meters, one side not moving at all, etc.)

Estimated time: thinking: 2 mwimplementation: 2 mwtesting: 2*1 mw

25 January 2007 VELO sub-projects

Eddy Jans 7

Test bake-out procedureBake-out procedure of rf-boxes has to be commissioned:regulation of lamps, temperature interlock, etc.

Estimated time: preparation: 1 mwimplementation: 2*1 mw

25 January 2007 VELO sub-projects

Eddy Jans 8

Turn over projectRotation of the detector half is adelicate, not yet well-establishedactivity.

Likely solution:Use 2 small cranes. Either poweredby hand or electricity.

Estimated time: preparation: 0.5 mwproduction of test tool: 0.5 mw ?testing: 2*0.2 mw

25 January 2007 VELO sub-projects

Eddy Jans 9

P project

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

-6 -4 -2 0 2 4 6

Mod 7Mod 3

x[mm]

p [mbar]

(elastic) deflection:0.3 mm @ 4 mbar

0.4 mm @ 5 mbar

25 January 2007 VELO sub-projects

Eddy Jans 10

evacuation

p=pbeam-pdet[mbar]

foilhits

sensorsside

25 January 2007 VELO sub-projects

Eddy Jans 11

venting

p=pbeam-pdet[mbar]

foilhits

sensorsside

25 January 2007 VELO sub-projects

Eddy Jans 12

Possible remedy:change p-range and/or central p-value.

Estimated time: preparation: 2*1 mwtesting: 2*0.5 mw

25 January 2007 VELO sub-projects

Eddy Jans 13

VELO vacuum commissioningUnacceptable leak rate (10-5 mbar.l/s) of rf-boxes necessitates additional tests + attempts to (temporary) fix the problem.Present plan with VELO + part I of the beam pipe:

• evacuate• bake rf-boxes @ 160 oC • vent ??• evacuate ??• determine leak rate• vent• seal “holes” with Varnish• evacuate• determine leak rate

Estimated time of NIKHEF-involvement: 2*2 mw

25 January 2007 VELO sub-projects

Eddy Jans 14

LHCb installation schedule

• Coming months lots of activities from RICH1, TT, VELO (HV, LV, ECS, etc.) in the vicinity of the VELO. Need for coordination, flexibility and mutual cooperation.• Jan 22 Mar 2:

Cabling (analog + control) around the VELO.• March + April: installation LV-distribution boxes, HV-patch panels• April 5:

Start bake out + commissioning of the complete LHCb beam pipe.

25 January 2007 VELO sub-projects

Eddy Jans 15

Summarywhat what where time

[mw]start at the latest on

ready before

who

2.003&4 cleanup IP8 0.5 1 Mar 15 Mar FM/MD/MKcooling cables connectorize IP8 2*1 15 Mar 1 Apr JS+??alignment design NL 1.5 1 Feb 15 Feb JvdB+FM

production NL 1.5 20 Feb 5 Mar VU

align IP8 2*0.5 15 Mar 23 Mar JvdB+FM

motion design NL 2 15 Apr 1 May PdG+MvBcoding NL 2 15 May 1 June PdG+MvB

testing IP8 2*1 15 Jun 1 July PdG+MvB

bake out design NL 1 15 Feb 1 Mar PdG+MvBtesting IP8 2*1 1 Mar 10 Mar PdG+??

turn over prep NL 0.5 15 Feb 1 Mar MK/MDprod. of test tool NL 0.5 1 Mar 15 Mar NIKHEF/CERN?

testing ?? 2*0.2 15 Mar 1 Apr MK+MD+RD

p prep NL 2*1 20 Feb 15 Mar MD+LJtesting IP8 2*0.5 15 Mar 1 Apr MD+LJ

vacuum comm. leak rate++ IP8 2*2 10 Mar 1 April LJ/MD/BM/FM