CERN — The European Laboratory for Particle Physics

Overview

Presentation to LHCC, HJH (pdf)

All in one (pdf)


2002-2005-req-sum.GIF

Vertex Locator

Year Beam line Periods Days Comments
2002 SPS X7 3 17 Test of fully equipped hybrids with full size prototype detectors with two options for front end electronics. The measurement of the pulse shape and noise will be a critical input to our electronics choice. Continue measurement of signal transmission with 60 m cables.
High momentum particles needed for precise system alignment and track extrapolation.
PS T7    
PS T11    
SPS GIF    
PS Irradiation 1 2.5
2003 SPS X7 2 14 Tests of first pre-production sensors, from several vendors, before and after irradiation. This is a full program, requiring the scanning of all different detector regions for resolution and signal to noise of high energy mips. Baseline tests of small detector prototypes from the R&D program for future upgrades. First test of full electronics chain with final readout and "module-0" design.
PS T7    
PS T11    
SPS GIF    
PS Irradiation 1 2.5
2004 SPS X7 3 21 Verification of irradiated test structures from all wafers of the final production. Verification of selected sensors. First fully surveyed assembly of a group of modules to be mounted in the test beam to perform critical system tests for alignment scenarios.
PS T7    
PS T11    
SPS GIF    
PS Irradiation 1 2.5
2005 SPS X7 2 56 Entire VELO, mounted in the vacuum tank with cooling, final electronics and motion mechanics to be operated in the test beam together with a target, to determine final alignment constants to be used in LHCb, and commission the system.
PS T7    
PS T11    
SPS GIF    
PS Irradiation    
2006 SPS H8 2 20 Verify and correct (if necessary) positions of VELO sensors while cooled and in vacuum. Obtain best possible alignment parameters of VELO sensors to achieve fast B-physics start-up at IP8. Test overall chain from sensor to vertexing and alignment  software, identical to what will be used at LHC for determining the relative VELO-beam positions.

Inner Tracker

Year   Beam line Periods Days Comments
2002 SPS X7 2 16 Test of full size prototype sensors with different strip geometries to decide on the optimal strip geometry. Tests have to be performed before and after irradiation of the sensors. Results of the beam tests are crucial input for the TDR.
PS T7    
PS T11    
SPS GIF    
PS Irradiation 1 2.5
2003 SPS X7 2 28 Test of first detector according to final specifications, possibly from different vendors. The performance of these sensors has to be evaluated, before and after irradiation at the PS, in order to place the mass production of ~1500 sensors.
PS T7    
PS T11    
SPS GIF    
PS Irradiation 1 2.5
2004 SPS X7 2 28 After the start of the production phase perform system tests, including all final components before and after irradiation. Later in the year, further tests for quality assurance during mass production.
PS T7    
PS T11    
SPS GIF    
PS Irradiation 1 2.5
2005 SPS X7 2 28 The Inner Tracker production will be completed and installation in the experimental cavern starts in the second quarter of 2005. Test beams are desirable to commission assembled detectors before integration in the experimental cavern. Inner Tracker stations consists of individual detector boxes, that can easily be mounted and operated independently.)
PS T7    
PS T11    
SPS GIF    
PS Irradiation    
2006 SPS H8 1 21 Alignment and calibration of fully assembled detector boxes. The goal is to exercise the final procedure and to establish a reference for the subset of boxes that can be studied in the test beam.
2007         R&D program for detector upgrade

Outer Tracker

Year   Beam line Periods Days Comments
2002 SPS X7     Test latest module design modifications. Performance tests of
. 5 m long module
. Position resolution along the wire for long modules.
. Homogeneous gas distribution.
. Effect of new wire-splitters and wire locator designs.
PS T7 3 21
PS T11    
SPS GIF    
PS Irradiation    
2003 SPS X7     Important milestone to produce 10% of the modules by 7/2003
Performance tests of first modules from production lines:
Check that all parameters measured in Module 0 prototypes are maintained during series production and that they are up to standards
Check that all laboratories involved produce modules with homogeneous quality
PS T7 1 21
PS T11    
SPS GIF    
PS Irradiation    
2004 SPS X7     10% of electronics ready in 9/2003
· First tests of modules with the final electronics. Check all parameters again.
· Check grounding quality in a "realistic" environment and give possible feedback for station assembly of modules.
PS T7 1 21
PS T11    
SPS GIF    
PS Irradiation    
2005 SPS X7     Final checks before experiment startup:
· Fine tune exact gas composition (possible variations at the percent level).
· Possibly, combined test with IT to check alignment procedures and push offline software readiness
PS T7 1 21
PS T11    
SPS GIF    
PS Irradiation    

RICH

Year   Beam line Periods   Weeks Comments
2002 SPS X7 1   7 The baseline RICH photon detector is the pixel HPD. The project is currently at the prototyping stage and the HPDs must be tested to ensure they will satisfy the RICH requirements. Most tests are carried out in the lab using pulsed light sources, but the crucial requirement is the detection efficiency and spatial precision of Cherenkov light produced in the LHCb radiators, when read out at LHCb speed. The measurements of Cherenkov photon yield and the precision in reconstruction of the Cherenkov angle are made using a prototype Cherenkov vessel in charged particle beams. These tests will run in 2002(Q3/4) for the current (10MHz) prototpye HPD and in 2003(Q2/3) for the pre-production (40MHz) HPD. Either of T7 or X7 are suitable, and the HPD tests can run together with the aerogel tests.
PS T7 2   14
PS T11      
SPS GIF      
PS Irradiation      
2003 SPS X7 2   14
PS T7 2   14
PS T11        
SPS GIF       LHCb needs to maximise the yield of focused Cherenkov light from its aerogel radiator. The radiator is produced in tiles, which will be stacked into a wall. Research is underway at Novosibirsk and Matsushita to optimise the process of manufacture of silica aerogel tiles with high clarity and large dimensions. Although photometric lab tests provide important data, the crucial test is a measurement of the focused Cherenkov photon yield and particle identification performance using the prototype RICH detector in charged particle beams. Photon yield and angular precision will be measured for various tile dimensions, clarity, and optical filters. Samples from different processes (hygroscopic or hydrophilic gels) will also be tested. The R&D programme will continue from 2002-2005. T7 provides the required momentum range for particle ID with aerogel.
PS Irradiation      
2004 SPS X7 2   14
PS T7 2   14
PS T11      
SPS GIF      
PS Irradiation      
2005 SPS X7 1   7 The RICH1 quadrant test is a full RICH system test using the RICH1 vessel, with one quadrant equipped with mirrors, photon detector array and readout electronics. By running these tests during late 2003/early 2004 we hope to identify potential practical problems (such as light tightness, operation of large numbers of readout channels, HV distribution, etc) in time to rectify them before assembly of the final detector. Space requirements limit these tests to the X7 beam line.
PS T7 2   14
PS T11      
SPS GIF      
PS Irradiation      

Muon System

Year   Beam line Periods Days Comments
2002 SPS X7 1 6
o Extensive tests of module 0 for MWPCs (6 chamber types) and RPCs (2 chambers).
For each chamber we need about 3-5 days of testing.
o Technology studies for inner part of M1 (triple GEM and asymmetric MWPC)
o Tests with new FE-chips (CARIOCA and DIALOG)
o Aging studies in GIF with subsequent tests under high rate will continue
o Most of the activity takes place in T11, which is by far not fully occupied
o Some work has to be done also at X7, in particular high rate/intensity studies and gas sytem studies with a closed loop
PS T7    
PS T11 3 42
SPS GIF 2 14
PS Irradiation 1 2.5 Test of electronics
2003 SPS X7 3 21 o Test of closed loop gas system for both MWPC and RPC with final number of gas-gaps connected serially
o Test of module 0 for the inner part of M1 (after technology choice)
o Tests with prototypes of the Off Detector Electronics, in particular with:
- the SYNC chip
- Intermediate boards to form logical channels
- the service boards with CAN-ELMB to control the FE-boards
- first prototypes of the trigger electronics
o Aging studies in GIF with subsequent tests under high rate will continue
PS T7    
PS T11 4 56
SPS GIF 2 14
PS Irradiation 1 2.5
2004 SPS X7 1 7
o Test of small samples of chambers constructed in the various production centers
o Read out of the complete electronics chain of the muon system down to the DAQ with final Readout Units, in part. to check for possible instabilities wit fast front-end electronics due to high channel density
o Aging studies in GIF with subsequent tests under high rate will continue
PS T7    
PS T11 2 28
SPS GIF 2 14
PS Irradiation 1 2.5
2005 SPS X7 1 7  
PS T7    
PS T11 2 28
SPS GIF 2 14
PS Irradiation 1 2.5

Calorimeter system

Year   Beam line Periods Days Comments
2002 SPS X7 3   41 The main motivation for test beam is the calibration of PS/SPD, ECAL and HCAL modules. All modules are pre-calibrated by other means than test-beam, using LED systems, radioactive sources and cosmics. We intend to check the quality and stability of this pre-calibration for ~10% of the modules with test beam (~600 channels for PS/SPD, ~600 channels for ECAL and ~200 channels for HCAL). Production of modules has started and extends till 2004. Therefore calibration runs will take place from 2002 till 2004. We also intend to have a final combined test of SPD/PS+ECAL+HCAL modules in 2004 to tune the coefficients of the reconstruction programs. Furthermore we need to test with beam the cards with final design of the SPD, PS and ECAL/HCAL electronics in 2003 and 2004.
PS T7      
PS T11      
SPS GIF      
PS Irradiation      
2003 SPS X7 4   56
PS T7      
PS T11      
SPS GIF      
PS Irradiation      
2004 SPS X7 4   56
PS T7      
PS T11      
SPS GIF      
PS Irradiation      
2005 SPS X7        
PS T7      
PS T11      
SPS GIF      
PS Irradiation