1. on behalf of the LHCb collaboration Tatsuya Nakada CERN and EPFL*)
CERN-RRB
Status of the LHCb Experiment LHCb Resource Review Board 22nd October 2003
on behalf of the LHCb collaboration
Tatsuya Nakada
CERN and EPFL*)
*) Institute of High Energy Physics (IPHE), University of Lausanne
was transferred to Laboratory of High Energy Physics (LPHE), EPFL

2. Contents Detector status Revised cost and funding of the experiment
Conclusions

3. 1) Detector status All the detector subsystem TDR’s are now completed
Approved TDR’s
Last two detector TDR’s just submitted
(Computing TDR to be submitted later)

4. The LHCb detector Changes were made for
Reduced number of layers for M1 (4  2)
Reduced number of tracking stations behind the magnet (4  3)
No tracking chambers in the magnet
No B field shielding plate
Full Si station Reoptimized RICH-1 design
Reduced number of VELO stations (25  21)
Changes were made for
material reduction and L1 trigger improvement

5. Beam Pipe
Al window
Done by the LHC vacuum group
EDR 30 Sep 2003

6. Magnet Yoke Assembly of the lower half Plates are fixed by tie-rods
Lower half completed
Assembly of the sides in progress

7. VELO Si sensor test beam set-up Wake-field suppressor and RF foil
Prototype
Test
design
constructed
Construction
of VELO tank
support stand

8. Outer Tracker EDR in June and ready for the production
Aligning the template
for straw gluing
Straw production

9. RICH2
RICH2 exit window being made

10. Calorimeter SPD/Preshower production started
Ecal modules: 100% constructed
Hcal modules: 30% constructed

11. Muon system Frascati CERN First series production chambers
Frascati Clean Room
panel on wiring machine
soldering table
assembly tables
Frascati
First series production chambers
CERN

12. Online Final prototypes being produced
Gbit Ethernet board for the common readout card (TELL1)
Timing and Fast Control (trigger and readout supervisor)

13. Offline
A small team, working efficiently and collaborating well with LCG,
is producing only “very essential” software:
 led to the success of the TDR performance study
However with down-scoping, delaying, reprioritizing…
LHCC manpower review for the core offline software
The committee reviewed their manpower planning and agree with their
estimates that the current shortage of core software developers is about
six (6) FTEs. As a consequence of this shortfall there are a number of
areas that do not receive the attention they deserve. With the additional
manpower they would be able to put effort on the development and testing
of the conditions database infrastructure, on user support, QA,
documentation and the maintenance of the collaboration’s web pages.
Collaboration will seek for help from the collaborating
institutes, including CERN.

14. LHCb Milestone Plots

15. Reoptimization  Modified RICH1 and TT designs
RICH1: material reduction incorporate B field
TT: to be included in Level-1 trigger

16. RICH1 -Vertical optics with two mirrors
-Spherical mirror from composite or Be
-Mirror support out of acceptance
-Direct coupling to VELO tank -Iron B field shielding box

17. Trigger Tracker Test beam: long silicon ladders with large strips.
8.3 m2 of Si
180k readout channels
~30 cm ladder

18. Examples for event efficiencies
e total = e acceptance  e trigger  e reconstruction
Decay modes TP [%] Now [%] Comments
B0p+p g with
BsK+K U-spin
BsDsK g
B0DK* g
BsDsp Bs oscillations
B0J/y(mm)KS b
BsJ/y(mm)f c
B0gK* bs penguin
Similar physics performance to that given in TP, but with
much more realistic simulation programme. (event generation, detector response, pattern recognition etc.)

19. 2) Revised cost and funding of the experiment
Subsystem Cost [MCHF] D from MoU Comment
VELO MoU included Pile-Up trigger
IT 2.47
TT 3.40
OT  3 stations*)
RICH New RICH1*)&MaPMT analogue
Calo 15.06
Muon detect. 6.93
Muon Fe 4.00
L0 Trig 2.26
DAQ&CPU(L1/HTL) 5.71
ECS&TFC 1.58
Computing infra. 0.71
Experiment infra. 4.00
Magnet 6.00
-0.28
+0.72
Now all Si TT*)
-3.86
+1.87
-0.30
-0.52
+0.06
Pile-Up trigger added
*) due to reoptimization
Increase of RICH1 mechanics from TDR = 492kCHF:
due to B field shielding box, Be mirror, superstructure, etc.
Total cost = MCHF (-2.31 MCHF compared to the MoU cost)
Requested funding in MoU = MCHF

20. Revised Funding situation (in MCHF)
Funding country MoU Now Comments
Brazil MoU not signed
China MoU by Tsinghua University
FR(IN2P3) extra engineering effort by Annecy
DE(BMBF) MoU to be signed. New MPI request not approved
(MPG) some uncertainty
IT extra contribution to Muon NL
Poland MoU to be signed
Romania
Russia shifted to machine, CERN partially compensates
Spain 2 2
Switzerland UK
Ukraine
CERN inclu. muon Fe and Russian compensation
Total

21. Funding balance and strategy
Current funding MCHF
Current detector cost MCHF
Balance MCHF (2.6%)
The cost-funding matrix must be revised
in order to accommodate the changes caused by the reoptimization of the detector
and presently available funding.

22. What we present now is a model we consider reasonable
Two guidelines for the revision:
Move CERN and Common Funds first to balance
Move national funding among the already committed subsystems
What we present now is a model we consider reasonable
The LHCb collaboration would like to ask RRB to support
the principle of
shifting the funding allocations among different subsystems in agreement with the parties concerned

23. Cost-Funding Matrix

24. Country (subsystem) MoU New CERN (ST) 0.00  0.56
CERN (OT) 3.40  0.00
CERN (RICH) 1.00  adjusting for the overall situation
CERN (Muon) 0.20  0.52
CERN (Online) 0.73  2.38
IT (Muon) 4.85  extra contribution
IT (Trigger) 0.80  0.43 due to cost reduction
IT (Online) 0.50  0.87 increased responsibility
UK (RICH) 5.70  6.30
UK (Online) 0.60  0.00
DE(ST) 1.69  1.72
DE(OT) 1.92  2.17
DE(Online) 1.02  0.00
DE(CF) 2.00  1.70
CF (Muon) 0.00  0.40 adjusting for no Brazilian funding
CF (OT) 0.90  0.63
CF (Online) 3.50  2.43
CF(Calo) 5.31  5.29
CF(reduction) 0.00  0.96 due to reduced funding
adjusting for the RICH cost increase
adjusting for the BMBF rejection
for the MPI funding request
A model for redistribution (MCHF)

25. How to cope with missing fund?
ST kCHF due to the funding reduction by BMBF
 continue effort to reduce cost and to restore reduced funding
RICH 500 kCHF due to the photon detector option
 continue effort to reduce cost and to search for extra funding
Online 1016 kCHF
 CPU’s, 3158 kCHF, will be bought as late as possible (>2005)
i.e. we have time to keep trying to get funding from Brazil.
If still no funding available, start with a smaller number (2/3) of processors.

26. 3) Conclusions
Reoptimization of the LHCb detector successfully finished and all the detector TDR’s completed.
Magnet, Calorimeters and RICH2 production advancing. VELO, Muon and Outer Tracker production just started/about to start.
Cost of the reoptimized detector ~73 MCHF, ~2 MCHF less than that given in MoU, matching with the MoU funding prospect.
Due to funding reduction by some countries, in spite of extra contribution from Italy, still under-funding of ~2 MCHF. However, we have a strategy to cope with it.
We would like to ask RRB supporting the principle of making the necessary shifts of funding among subsystems.