Status of the lhcb experiment lhcb rrb at cern 25 april 2007
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CERN-RRB-2007-044 24 April 2007. Status of the LHCb Experiment LHCb RRB at CERN 25 April 2007. on behalf of the LHCb Collaboration Tatsuya NAKADA CERN and EPFL. Contents. Construction and Installation Cost and Funding Conclusions. I) Construction and Installation. LHCb Spectrometer.

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Status of the LHCb Experiment LHCb RRB at CERN 25 April 2007

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Status of the lhcb experiment lhcb rrb at cern 25 april 2007

CERN-RRB-2007-044

24 April 2007

Status of the LHCb ExperimentLHCb RRB at CERN25 April 2007

on behalf of the LHCb Collaboration

Tatsuya NAKADA

CERN

and

EPFL


Contents

Contents

  • Construction and Installation

  • Cost and Funding

  • Conclusions

LHCb RRB Status Report


I construction and installation

I) Construction and Installation

LHCb Spectrometer

OT

Muon System

Magnet

RICH1

VELO

RICH2

Calo. System

TT

LHCb RRB Status Report


1 experimental area

1) Experimental Area

RB86

POINT 1

Mu-system

HCAL

ECAL

RADIATION SHIELD

C

A

B

RICH2

IT+OT

LHC

CRYO

MAG.

RICH1

IP8

VELO

PX SHAFT

POINT 7

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

IP8 now

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

Gas and cooling pipes installed in the detector areaMost of the long distance cables installed

Remaining major work:complete the shielding wallgas pipe installation on the gantry

The upper part of theshielding wall

Cooling pipes for TT

LHCb RRB Status Report


2 beam pipe

2) Beam Pipe

1st and 2nd 10 mrad Be section (UX85/2-3)

Al exit window

25 mrad Be section (UX85/1)

stainless steel section (UX85/4)

Leaks in UX85/3 repaired by varnishingserious concern forlong term stability due to radiationLHC vacuum group (AT/VAC ) requesting to prepare a replacement piece

Complete beam pipe installed and leak testedbake out in May

Al spare beam pipe now being made by CERN

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

behind TT

in the calorimeters

10 mrad section

Al bellow

end of 25 mradsection

through the magnet

LHCb RRB Status Report


3 magnet

3) Magnet

(funded by Common Fund)

Construction completedandcommissioned

Work to incorporate the measured field mapin progress: method being tested by MC data

difference between“true” and “parameterization”By (main component) in the z = 5 m (in the magnet) plane very small difference

LHCb RRB Status Report


4 vertex locator

4) VErtex LOcator

(funded by CH, DE, GB, NL)

VELO tank fully equipped with RF foils and NEG coatedready to receive the detector modules

exit window

Two RF boxes

looking through from upstream

VELO tank and signal cables

RF boxes developed some leaks;-between prim.-sec. vacuums no immediate concern-NEGtank saturate  may become a problem with high Ibeam?

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

Sensor module production completed

Right Detector Half fully assembledundergoing full electrical tests

Left Detector Half assembly close to completion

Commissioning of the final electronics in progress

21 VELO modules+2 pile-up sensors

constraint system

repeater cards

Right Detector Half

LHCb RRB Status Report


5 rich

5) RICH

(funded by CERN, CF, GB, IT)

RICH-2: In place and Photon Detector installedIn situ commissioning started

RICH-1:Gas enclosure completed and tested in situC-fibre mirror produced and coatedmirror system being assembled and aligned

Reflectivity of MgF2 coating

RICH-2 HPD column installation

RICH-1 four uncoatedspherical mirrors

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

All the HPDs, except spares, producedIn situ readout and slow control commissioning started

RICH-2 temperature reading

A screen shot of RICH DAQ testing

LHCb RRB Status Report


6 outer tracker

6) Outer Tracker

(funded by CERN, CF, CN, DE, NL, PL)

Outer Tracker installation completedInstallation of services in progressIn situ commissioning started

long term stability of TDC count

cabling work

OT stations

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

Progress on the “aging” issue:

Problem is not due to the accumulated dose

Fast gain loss at a particular rate, expected in the regions closest to the beam pipe

An effective prevention method now identifiedwarming up to ~40C and flush with gas for many days

Gain profilebefore heating

y

Expected current profilefor L=21032

After 10 daysof heating

IT

x

50 % gain loss15% efficiency loss/tube

NB different scale

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

All the modules have been installedspecial heating tool needed for in situ treatmentprototype produced and to be tested in the vertical position

Warming up procedure needs to be precisely defined for how long, at which temperature, with which gas flow, all the modules or only the central ones

Recovery is possible with positive and negative HV treatments

jacket

heater

heating tool prototype

LHCb RRB Status Report


7 silicon tracker

7) Silicon Tracker

(funded by CERN, CH, DE, ES, UA)

Ladder production almost completed100% for TT and >70% for IT completed

IT detector boxes now finalised

IT improved test system

one-sensor and two-sensor detector boxes

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

TT infrastructure installed and protection of the beam pipeagainst TT frame closing verified

TT cable chain

beam pipe

TT frame

RICH-1 window

Digitizer cards: all produced but set back due to deliveredcomponents not matching specificationsbeing repairednot critical, but inconvenient for commissioning

LHCb RRB Status Report


8 calorimeter system

8) Calorimeter System

(funded by CERN, CF, ES, FR, RO, RU, UA)

Cabling of Scintillator Pad Detector/Preshower in progress

Ecal/Hcal front-end all installed and commissioning advanced

Cal racks on the balcony

C-side 183 PS cables in the cable chain

Cal front-end cards

LHCb RRB Status Report


9 muon system

9) Muon System

(funded by CERN, CF, IT, RU)

All MWPCs and GEMs produced and tested, except spares

C-side M2-M5 fully installed and commissioning startedA-side M2-M5 installation of infrastructure being completedchamber installation in progress

C-side M2 station completed

A-side M2 wall

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

M5R1

X-talk~0.5/14=3.6%

M1R2

[email protected]/fC

X-talk~0.25/7=3.6%

Chambers, tested before installation in the laboratory and at CERN. Tested again after the installation in situ

gas tightness test

plateau test with cosmicsbefore installation

noise test

Procurement for the M1 support components started: some more details to be worked out: very tight schedule

LHCb RRB Status Report


10 trigger and online

10) Trigger and Online

(funded by CERN, CF, CH, DE, FR, ES, IT, NL)

Level-0 trigger consists of four components

Pile-up

L0

Calorimeters

L0

Muon

L0

DecisionUnit

in production

already enough produced for commissioning quadrant

ready

They aremostly a part ofthe calorimeterelectronics

four dedicateddetectors integratedin VELO

muon processors

L0DU

HLT is now optimized for 1 MHz readout data

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

Installation of the online equipment and necessary cablingprogressing in the control room (surface) and in the barrack (accessible part of the underground area)

on thesurface

undergroundbarrack

storage disk array

TELL1’s

Control room

Data networkswitches

LHCb RRB Status Report


11 computing

11) Computing

Physics quality software in placeReconstruction package released to be used for physics performance studies in preparation for data

Further tracking optimization for 900 GeV data, if needed

Global alignment challenge to be launched soon

Data Challenge 06 on goingLHCb GRID computing after MC production, i.e. reconstruction and stripping still encounters difficultyin data access. Closely working with the site, LCG projectand middleware developers to overcome the problem

Full testing of analysis in a GRID environment is stillpending.

LHCb RRB Status Report


Iii cost and funding

III) Cost and Funding

Change from the last RRB in October 2006

Cost:No change75.341 MCHF

Funding:New contributions Spain (20 kCHF), UK (400 kCHF)requests made for CPU’s in 2006 approvedFR (300 kCHF)in addition to already made extra contributionBR (55 kCHF)first contribution to the detector costUS-NSF (30 kCHF)2007 contribution to the CPU’s450 kCHF request for 2007-2009 not approved

Missing:497 kCHF(Was 1302 kCHF at the time of the October 2006 RRB)

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

(in kCHF)MoUExtra forExtra forCountry signeddetectorCPU

Brazil0055

China10000

France75000800

Germany BMBF3757381300

Germany MPG220000

Italy100008470

Netherlands63003810

Poland50000

Romania30000

Russia250000

Spain2000020

Switzerland790000

UK1030044400

Ukraine20000

US-NSF00560

CERN167007990

April 2007

Total Cost75.341 MCHF

Total funding74.844 MCHF

Still missing497 kCHF

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

Total CPU needs:3.420 MCHFmissing 497 kCHF not an immediate problem

possible further contribution from BR, and others

Additional cost on horizon:

-replacement Be beam pipe section: UX85/3expected to be substantial; i.e. O(MCHF)needed only in a few years but long production timecommitment required soon…

-VELO replacement RF boxescost expected to be not highbut expert manpower and R&D may be needed

LHCb RRB Status Report


Iii conclusions

III) Conclusions

Installation of the spectrometer is nearing completion, and commissioning has started for many subdetectors. Computing and physics preparation for data ongoing.

Schedule is still tight, in particular, for the production ofIT, RICH-1 mechanics integration, and Muon system installation

Further additional contributions approved for the CPU farm55 kCHF (Brazil), 300 kCHF (France), 20 kCHF (Spain), 400 kCHF (UK) and 30 kCHF (US-NSF)497 kCHF still missing for the CPU farm.Vacuum pipe replacement will require additional money.Continue to seek extra funding: pending request to Italy, further requests to Brazil, US-NSF, etc.

LHCb RRB Status Report


Status of the lhcb experiment lhcb rrb at cern 25 april 2007

LHCb RRB Status Report


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