Workshop Chamonix XV27-January-2006 DivonneMassimiliano Ferro-Luzzi 1 State of LHCb for the Sector...

Workshop Chamonix XV 27-January-2006 Divonne Massimiliano Ferro-Luzzi 1

State of LHCb for the Sector Test

Overview Agreement Status of

– VELO– exit window– beam pipe

elements Planning Summary

Overview Agreement Status of

– VELO– exit window– beam pipe

elements Planning Summary

LHCb

Many thanks to Delio Duarte Ramos, Gloria Corti, Rolf Lindner, Adriana Rossi

Many thanks to Delio Duarte Ramos, Gloria Corti, Rolf Lindner, Adriana Rossi


LHCb at Point 8

Beam 2


Status end of 2005

All subdetectors will be there during the sector tests, except the VELO silicon modules

All subdetectors will be there during the sector tests, except the VELO silicon modules


LHCb: essential elements for sector test (1)

Beam 2

VELONIKHEF

Providing vacuum continuity throughout LHCb


LHCb: essential elements for sector test (2)

Beam 2

Beam pipe(s)+ Exit windowCERN/AT-VAC

Providing vacuum continuity throughout LHCb


« The Agreement »

Radiation: LHCb area, including the detector, will

remain a non-designated one after the sector test

Material leaving the LHCb cavern after the test can be declared as non-radioactive

LHCb not precluded from accessing LHCb counting house (behind the shielding wall) during the sector test

Planning: The interruption to the LHCb installation

due to the sector test should not exceed three weeks

Under discussion with AT-VAC

Operational: LHCb spectrometer magnet will be OFF

LHCb VELO and beam pipe will be under vacuum (pbeam<1e-6 mbar)

Bake-out/activation in the planning LHCb geometrical aperture will be everywhere 50 mm or more

Counting house

Shielding wall


The Vertex Locator

Silicon modules

Vacuum vessel

« RF box »

Home-made rectangular bellows

VELO exit window

Wake field suppressor

~1 m


VELO vacuum

Design: pbeam < 1e-8 mbar pdet < 1e-4 mbar|pbeam - pdet| < 5 mbar (critical: 15 mbar)

Design: pbeam < 1e-8 mbar pdet < 1e-4 mbar|pbeam - pdet| < 5 mbar (critical: 15 mbar)

Detector boxes moved out by 30 mm each during sector test.Actual detectors won’t be installed for sector test.

Detector boxes moved out by 30 mm each during sector test.Actual detectors won’t be installed for sector test.


VELO vacuum vessel

Vacuum vessel delivered to NIKHEF on April 8 2005


VELO vacuum and positioning systems

Vacuum system assembled and tested

Detector positioning system assembled and tested

Installation at IP8 starts in one month


VELO rectangular bellows

Tested for 15000 movement cycles

Final bellows manufactured and installed in vacuum vessel


VELO dump down

0

100

200

300

400

500

600

700

800

900

1000

7-11-0514:52

7-11-0516:04

7-11-0517:16

7-11-0518:28

1.E-07

1.E-06

1.E-05

1.E-04

1.E-03

1.E-02

1.E-01

PI411

PI421

PI422

PI412

PE411

PE421

PE422

PE412

PE4xx [mbar]

PI4xx [mbar]

Tested with dummy volume (replacing beam pipe)

Achieved |pdet-pbeam|<3 mbar throughout complete procedure

Tested with dummy volume (replacing beam pipe)

Achieved |pdet-pbeam|<3 mbar throughout complete procedure

After bake-out achieved pbeam = 3e-9 mbar

After bake-out achieved pbeam = 3e-9 mbar

PLC check actions


Controls of VELO vacuum system

PLC based Pump down, bake-out and vent procedures tested Data exchange with LHCb and LHC SCADAs yet to be implemented For more information, see last VELO-AT/VAC meeting

http://indico.cern.ch/conferenceDisplay.py?confId=a057358


300 um Aluminium detector boxes

NEG wires

Extremely complex shape and time-consuming manufacturing process:

– Hot gas forming– 0.3 mm / 0.5 mm Al welding– Apply Torlon coating inside

First complete prototype: – Good geometry– Checked deformation under

pressure difference: OK.– But: too large leak rate– NEG and Torlon coated applied

Final 2 boxes are being made:– Expect delivery to CERN at end

of July 2006 – Then, apply NEG– Then install in vacuum vessel


VELO emergency grid pipe

Cu beam pipe with pumping holes Was requested for emergency

scenarios Could be used for sector test if RF

boxes are not installed in time


“Upstream” beam pipe (RB84)

VELO

SHIELDINGFixed support

Bellow

Integration done, consists mainly of LSS design components, manufacture will be done through the same

contracts


Schedule Excerpt (VELO)

LHCb planning takes sector test into account

v6.0

v6.0


LHCb beam pipe


Exit Window

Prototype made and tested– Bake-out at 150ºC successful. Helicoflex

seal still leak tight although manufacturer specs gives a max temperature of 120ºC

– Pressure tested at 1.5 bar, maximum displacement < 0.5 mm

Helicoflex seals in stock 2 final windows machined

– now under metrological control– welding of a temporary cap will be done and

the vacuum tests performed


Beryllium beam pipe section #1 UX85/1

First prototype made Leak tested NEG coated Considered to be good enough for

installation Ready for welding to VELO

window (foreseen for mid February)

Al window2 mm thick

UX85/1Be pipe1 mm thick

L. Bouvet + D. Duarte Ramos


Beryllium beam pipe section #2 UX85/2

Being shipped to CERN from Kompozit, in Moscow

Vacuum acceptance tests and NEG coating will follow

All necessary tooling is ready


Beryllium beam pipe sections #3 UX85/3

Manufacture is ongoing Delivery foreseen by end February


Stainless steel beam pipe section #4 UX85/4

Last tests being performed (perhaps already on the road to CERN)

Cone: Cu coated Acceptance tests and NEG coating will

follow Nearly all tooling available


Transitions, supports and tooling

bellows UX85/3 - UX85/4: – stainless steel, – being manufactured, – expect delivery in the coming

weeks bellows UX85/2 - UX85/3:

– aluminium, – design being modified to improve

reliability bellows UX85/1 - UX85/2:

– aluminium,– two bellows connected by a tube

with flanges on the extremities,– part of the first fabricated series

presented leaks on the bellows convolutions

– material used, manufacturing and cleaning processes are being improved to increase their reliability

Beam pipe supports: – all conceptually designed, – detailing being finished,

– manufacture to start soon Installation tooling:

– conceptual design of the tooling for UX85/1+Velo window is being finished,

– remaining will follow. Beam pipe bake-out equipment:

– conceptual design being done, – components will be ordered in

the coming weeks Spare Al beam pipes:

– Manufacture started this week, – first beam pipe delivery is

foreseen end of March,– remaining two in the following

two months


Schedule Excerpt (RICH1 + Beam Pipe)


Summary…

Radiation: LHCb area, including the detector, will remain a non-designated one after

the sector test Material leaving the LHCb cavern after the test can be declared as non-

radioactive LHCb not precluded from accessing LHCb counting house (behind the

shielding wall) during the sector test

Planning: The interruption to the LHCb installation due to the sector test should not

exceed three weeks

Operational: LHCb spectrometer magnet will be OFF LHCb VELO and beam pipe will be under vacuum (pbeam<1e-6 mbar) Bake-out/activation in the planning LHCb geometrical aperture will be everywhere 50 mm or more

Under discussion with AT-VAC

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Workshop Chamonix XV27-January-2006 DivonneMassimiliano Ferro-Luzzi 1 State of LHCb for the Sector...

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