CERN/LHCC 2003-068
LHCC 67
5 December 2003

 
LARGE HADRON COLLIDER COMMITTEE

Minutes of the sixty-seventh meeting held on

Wednesday and Thursday, 26-27 November 2003



OPEN SESSION:

1. RD39 Status Report: Tapio Niinikoski

2. RD42 Status Report: Peter Weilhammer

3. RD50 Status Report: Mara Bruzzi

4. Status Report on the Front-end ASIC for the ALICE Time-of-Flight Detector: Crispin Williams

5. ALICE Test Beam Report: Paolo Martinengo

6. Report from the ATLAS Athens Physics Workshop: Giacomo Polesello

7. Report from the CERN Workshop on Monte Carlo Tools for the LHC: Michelangelo Mangano

CLOSED SESSION:

Present:         S. Bertolucci, K. Borras, M. Calvetti (Chairman), R. Cashmore, A. Ceccucci, F. Ferroni, M. Hauschild,
                     H. Hoffmann*, M. Jaffre, Y. Karyotakis, V. Kekelidze, Y.-K. Kim, J. Knobloch, M. Mangano, J. Martin,
                     P. McBride, K. Potter, D. Schlatter, P. Seyboth, H. Tiecke, K. Tokushuku, E. Tsesmelis (Secretary), C. Vallée, T. Wyatt

Apologies: J.-J. Gomez-Cadenas, J. Panman

                                                                                *) Part time
  • PROCEDURE


    The Chairman welcomed the new members of the Committee and thanked the outgoing members for their dedication and invaluable help. He also thanked Professor Roger Cashmore for the magnificent job that he has done in wisely steering the LHC experiments through the construction and installation phases in the past
    5 years. Professor Cashmore in turn took the opportunity to thank the LHCC for the vital role it has played for CERN and the community.

    The minutes of the sixty-sixth LHCC meeting (LHCC 2003-044 / LHCC 66) were approved with the following modification: in point 9 (CMS Comprehensive Review), the first sentence of the last paragraph should be replaced by `The LHCC took note of the updated CMS Master Schedule v33.2 and will use it henceforth to monitor the CMS milestones.í

    The report from the CMS Comprehensive Review (LHCC 2003-045 / G-052) was approved with the following modification: in point 9 (Management, Technical Coordination, Integration, Schedules and Costs), the first sentence in the fourth paragraph should be replaced by `The CMS schedule is being tracked with v33.2, which is a variation without re-baselining of the v33 schedule used in the 2002 Comprehensive Review. The v33.2 schedule includes a 2-month delay in the magnet test, which will be recovered by limiting the underground tests, and a 2-month delay in the civil engineering for the USC55 cavern.í
     

  • REPORT FROM THE DIRECTOR FOR COLLIDER PROGRAMMES


    The Director for Collider Programmes informed the LHCC on various issues concerning CERN in general and the LHC Project in particular.

    The October Resource Review Boards took note of the various reports from the LHCC, consisting of the general status of the experiments, the installation reviews and computing resources reviews. Funds towards the Cost-to-Completion and the Maintenance and Operation for the experiments continue to be attributed.

    Good progress was reported on the LHC Machine. In particular, it was noted that delivery of cold masses, and the assembly and testing of the cryo-dipoles are progressing satisfactorily. The progress can be tracked on the LHC Dashboard accessible through the CERN Home Page. The primary outstanding concern lies with the installation of the cryogenics line.

    A report will be presented to CERN Council in December outlining possibilities for an upgrade to the LHC in terms of both luminosity and energy. An R&D programme on the detectors is required in order to meet the challenge of an upgraded LHC.
     

  • REPORT FROM THE ALICE REFEREES


    The LHCC heard a report from the ALICE referees, concentrating on the general progress of the experiment, the status of the sub-detectors and a report on the Addendum to the Photon Multiplicity Detector (PMD) Technical Design Report.

    The referees gave a report on the sub-detectors. Excellent progress was reported on the TOF and the HMPID. The development of the electronics and the chamber production for the TRD are progressing well. The TPC project is progressing well with the assembly of the field cage having started and with the front-end electronics being all near or into production. The problems in yield for some DSM front-end electronics ASICs for the SDD and SSD detectors have been solved and production runs for these chips are commencing. However, the LHCC expressed concern regarding the difficulties in establishing good bonding efficiencies in all ITS sub-systems and more generally in establishing the assembly rates necessary for the ITS to be ready for LHC start-up. The ITS is on a very tight schedule with no contingency left. The coils for the muon magnet have arrived at CERN but there are several months of delay in the delivery of the iron yoke from JINR. Although the first transport of the yoke steel plates has arrived at CERN, the LHCC considers this to be the most critical problem in the ALICE project. Most components for the muon spectrometer are now ready to start the series production.

    The Physics Performance Report Vol. I has been released and Vol. II will be submitted in mid-2004. The Trigger, High Level Trigger, DAQ and Detector Control System Technical Design Report will be submitted in time for the January 2004 LHCC session.

    The Committee heard a report on the refereesí review to the Addendum to the PMD TDR (LHCC 2003-38 TDR 6 Add. 1). The main physics goal of the PMD is to measure on an event-by-event basis the multiplicity and spatial distribution of photons in order to study event shapes and fluctuations in the forward region. Since the approval of the PMD TDR in 2000, it was noted that the performance of the detector in its original position at 5.5 m from the interaction point would be degraded by the front material of the beampipe and the services of the ITS and TPC detectors. A new location was therefore found at 3.6 m from the interaction point. The coverage in pseudo-rapidity of the detector was correspondingly changed from 1.8-2.6 to 2.3-3.5. Although the referees identified some minor concerns, they recommended general approval of the ALICE Addendum to the PMD TDR, pending a final cost evaluation.

    4. REPORT FROM THE ATLAS REFEREES

    The LHCC heard a report from the ATLAS referees, concentrating on an update on the sub-detectors and a report on the HLT/DAQ/Controls Technical Design Report. The LHCC also reviewed the status of the ATLAS milestones illustrating the monthly progress in terms of the number of scheduled and achieved LHCC milestones.

    Installation of the ATLAS infrastructure in the underground experimental cavern is progressing well, with that of the feet, rails and wheel supports having commenced. The delays with the ventilation contract are being discussed and should be resolved by the end of December 2003.

    A delay of between 4 and 4.5 months was reported in the start of installation of the first Barrel Toroid (BT) coil. The ATLAS Executive Board has discussed strategies to contain this delay by re-arranging operations within Phase II of the installation schedule. The measures proposed consist of advancing the installation of the support structures and platforms for the BT and calorimeters, bringing forward the installation of the Tile Calorimeter lower half barrel and installing some services before the BT is finished. A new ATLAS general schedule will be released once the first BT coil is complete.

    The ATLAS management has started negotiating with institutes, funding agencies and CERN to find solutions to increase the core computing manpower and to build up a stronger team based at CERN. Collaboration across all these partners is necessary for the success of the core computing effort.

    Good progress was reported on the ATMEL DMILL front-end electronics. All TRT ASDBLR chips have been delivered and tests on the wafers have been successful. However, due to the incurred delays the front-end electronics boards remain critical for both the Barrel and End-cap TRTs. All 27 digital LAr wafers have also been delivered and preliminary tests confirm their functionality. No further deliveries of the SCT ABCD chips are expected, with the consequence that only about 85% of the SCT will have chips with all channels working, the rest will have one out of 128 channels faulty. ATLAS acknowledges the important help of Roger Cashmore in dealing with the difficult negotiations with the ATMEL firm.

    The referees also reported on the status of the Inner Detector. A new problem in the Web circuit front-end electronics related to de-lamination of components keeps the system on the critical path. The TRT group is investigating ways to perform repairs. Moreover, problems were reported on the SCT Barrel and End-cap hybrids. Contamination of gold bond pads and the varying quality of the aluminum pitch adapters for the SCT Barrel and difficulties in start-up of SCT End-cap production together with technical problems for the flexes have been reported. The ATLAS groups are developing solutions to these problems and the LHCC will continue monitoring the situation. Finally, delays in the macro-assembly (modules to barrel and disks) are becoming critical since within the ATLAS installation schedule there is a very limited possibility for adjustment as the Inner Detector installation is followed by completion of the beampipe and the closing of the detector

    Good progress was reported on the LAr calorimeters. Module production is approaching completion, all three cryostats are in Bat. 180 and are being filled with wheels, and integration of the calorimeters is underway. However, concerns remain on the slower cooling procedures for the LAr Barrel and End-cap calorimeters and the on-detector electronics remain critical due to delays in the negative voltage regulators and the low voltage power supplies.

    The referees also reported on the status of the Tile calorimeter. The group has worked out an accelerated schedule in order to advance the start of installation in the underground cavern to March 2004. The end of production of the electronics drawers is expected in September 2004, with the most critical item being the low voltage power supplies.

    The Committee also heard a report on the muon detectors. Good progress was reported on the construction of the TGC and CSC detectors. However, completion of the MDT production is considered tight. Gap production for the RPCs is advancing on schedule but the rate of chamber production needs to be accelerated. Quality control procedures for the RPC production have improved. Ageing tests on the RPCs are well underway. After the equivalent of more than 4 years of ATLAS operation (including a safety factor of 5) there are indications that these detectors will perform well in ATLAS.

    The Committee heard a report on the refereesí review of the ATLAS High-Level Trigger, DAQ and Controls Technical Design Report (LHCC 2003-022 TDR 16). The referees found no fundamental reason why the system will not meet the physics requirements of ATLAS. Although the referees identified some minor concerns, they recommended general approval of the ATLAS HLT/DAQ/DCS TDR.

    5. REPORT FROM THE CMS REFEREES

    The LHCC heard a report from the CMS referees, concentrating on the general progress of the experiment and reports on the ECAL and Tracker sub-detectors.

    The referees reported on the status of the ECAL. Good progress was reported on the crystal production. Agreement has been reached with the producers and ISTC and a revised work plan and schedule have been signed. Conversion to the 2-in-1 production method has started, albeit slower than anticipated. The producers are putting effort into this new method in order to guarantee the delivery schedule. Significant progress was reported on the read-out electronics. Very encouraging results were obtained in test beams with the MGPA and the system passed successfully and the Electronics Systems Review. Submission of the final chips for the MGPA and ADC has been launched. The cost evaluation to the changes in the ECAL electronics shows that the costs are considered reasonable. They fit into the overall cost of the experiment and the assignment of manpower seems to be adequate. The overall ECAL schedule, however, remains a cause for concern as it is considered very tight for both the electronics and crystals.

    The Committee also heard a report on the Tracker. The referees reported on the problems with the ST Microelectronics sensors. The production process is considered to be unstable and the yield is low. CMS is investigating alternatives such as moving part of the order to Hamamatsu. The final decision will be taken in early January 2004 and the LHCC endorses the CMS plan. Good progress was reported on the assembly and integration of modules into sub-structures, the hybrids for the front-end electronics, and the module production. The Tracker schedule, however, remains very tight and is a cause of concern. In the event of a late delivery of the Tracker, CMS is studying ways to re-arrange the detectorís installation scheme.

    The referees also reported on the schedule and milestones. Construction of the magnet is on track. Concerns were expressed on the DT and RPC, with the integration of the former at CERN still being understaffed and the production of the latter needing acceleration. The gas and cooling pipework on the surface is significantly behind schedule and the contract for the rotating radiation shielding in the UXC55 underground cavern needs to be signed imminently. Concerns were also expressed in the late delivery of the USC55 underground cavern and the possibility of missing the ready-for-crate milestone in June 2005. The CMS schedule is getting tighter particularly with respect to the ECAL and Tracker. However, the CMS Management continues to find ways to accommodate the delays.

    6. REPORT FROM THE LHCb REFEREES

    The LHCC heard a report from the LHCb referees, concentrating on the choice for the RICH photon detector and reports on the Reoptimized Detector Design and Performance and Trigger System Technical Design Reports.

    The Committee heard a report on the choice between the Hybrid Pixel Detector (HPD) and Multi-anode PMT (MAPMT) for the RICH photon detector. Given that the HPD has a better intrinsic performance compared to the MAPMT, e.g. 40% more photons are detected and a lower cost, the RICH group has recommended the HPD as the photon-detector. The LHCb Technical Board endorsed the choice at its meeting at the end of October 2003. The LHCC took note of this decision and requests LHCb to submit in January 2004 a plan including milestones for the HPD production.

    The Committee heard a report on the refereesí review of the LHCb Reoptimized Detector Design and Performance and Trigger System Technical Design Reports (LHCC 2003-030 TDR 9 and LHCC 2003-031 TDR 10). The Committee finds the detector reoptimisation and the Trigger System adequate to achieve the physics goals stated in the Technical Proposal. Although the referees identified some minor concerns, they recommended general approval of the LHCb Reoptimized Detector Design and Performance and Trigger System Technical Design Reports.

    7. LHC COMPUTING GRID (LCG) PROJECT COMPREHENSIVE REVIEW

    The LHC Computing Grid (LCG) Project was created by CERN Council in September 2001 with the aim of prototyping and deploying the computing environment for the LHC experiments. The formal launch of the project was at a workshop held in March 2002. Since that time, the LCG Project has made very significant progress towards the realisation of the computing requirements of the experiments in time for LHC operation in April 2007.

    It is realistic to expect the LCG Project to have prototyped, built and commissioned the initial LHC computing environment suitable for LHC operation starting in April 2007. The LHCC considers that the LCG Project has made an impressive start to a very complex task in a very short time. In particular, the LCG Project scope has been clearly defined, the first application software products have been delivered to the experiments, the first Grid software suite has been defined and deployed, the initial Grid production service has been put into operation and will get tested by the experiment Data Challenges in 2004 and plans for increased functionality of the Grid services are being currently defined. The organisational structure of the LCG Project has been put in place and is able to adapt itself to the changing needs of the project.

    The first annual LHCC Comprehensive Review of the LCG Project took place on
    24-25 November 2003. The LHCC referees addressed the following areas: Status Update, Management and Planning; Middleware and Interaction with EDG/EGEE and other Developments in Middleware; Fabric Area; Grid Deployment and Regional Centres; Applications Area. The LHCC acknowledges the considerable amount of work that has gone into the preparation of the LCG Project Comprehensive Review.

    The conclusions and concerns of the LHCC are given below. They will help the Committee to follow up outstanding issues and to monitor future progress of this project in forthcoming sessions of the LHCC prior to the next LCG Project Comprehensive Review one year hence.

  • The LHCC noted significant progress in the LCG Project since its inception. The Committee took note of the new organisation structure put in place and that a significant majority of the LCG Projectís milestones are being met on time. Although resources are continuing to be allocated for the most part of Phase I, detailed discussions are required leading up to a Memorandum of Understanding for Phase II of the LCG Project.
  • The LHCC took note of developments in middleware project focusing on progress in the EGEE, EDA and ARDA endeavours. The Committee identified several concerns, particularly the risks associated with lack of product delivery and the difficulties in entering the analysis phase of the project. Further collaboration with the US partners and with all the Regional Centres is recommended.
  • The LHCC has no major concerns regarding the Fabric Area. The Fabric Area is considered to be the least controversial component of the LCG Project.
  • Although delays in the deployment of the LCG-1 software package have been reported, several Regional Centres have now installed successfully the package and integration of the experiments into the LCG Project is in progress. Problems encountered with LCG-1 are being corrected in time for LCG-2 that is to be deployed by the end of 2003. The LHCC underlined that it is only the beginning of the LCG Project and the community
    is learning to handle the new Grid computing environment.
  • The LHCC noted the good progress in the Applications Area. Manpower levels are adequate, the scope of the project is properly defined and milestones are being met, including deployment of the first products, e.g. POOL, in the production environment of at least one of the LHC experiments. The Committee underlined the importance of supporting the Monte Carlo generator codes for the experiments.


    8. LHCb REOPTIMIZED DETECTOR DESIGN AND PERFORMANCE TECHNICAL DESIGN REPORT

    The LHCC has completed its scientific, technical, and cost evaluation of the LHCb Reoptimized Detector Design and Performance Technical Design Report submitted in September 2003. The LHCC finds the detector reoptimization adequate to achieve the physics goals stated in the Technical Proposal and congratulates the LHCb Collaboration for the work presented in the TDR. The physics expectations of the reoptimized detector will allow a precision measurement of the CP parameters and a coherent test of the Standard Model.

    The Committee has no major concerns. An ancillary document (LHCC 2003-064) contains items of lesser concern as well as a list of agreed milestones for monitoring the progress of the project. The LHCC review was not an engineering review, although some engineering aspects of the project were presented and discussed with the referees. The LHCC recommends that LHCb follows the established practice of conducting independent reviews of the engineering designs. Written reports should be made available to the LHCC through its referees.

    Recommendation

    The LHCC recommends general approval of the LHCb Reoptimized Detector Design and Performance Technical Design Report. The LHCC considers the schedule given in the TDR and the list of milestones in the ancillary document to be reasonable. They will be used by the Committee to measure and regulate the future progress of the project.

    9. LHCb TRIGGER SYSTEM TECHNICAL DESIGN REPORT

    The LHCC has completed its scientific, technical, and cost evaluation of the LHCb Trigger System Technical Design Report submitted in September 2003. The LHCC finds the architecture adopted for the Trigger System adequate to achieve the physics goals stated in the Technical Proposal and congratulates the LHCb Collaboration for the work presented in the TDR.

    The Committee has no major concerns. An ancillary document (LHCC 2003-066) contains items of lesser concern as well as a list of agreed milestones for monitoring the progress of the project. The LHCC review was not an engineering review, although some engineering aspects of the project were presented and discussed with the referees. The LHCC recommends that LHCb follows the established practice of conducting independent reviews of the engineering designs. Written reports should be made available to the LHCC through its referees.

    Recommendation

    The LHCC recommends general approval of the LHCb Trigger System Technical Design Report. The LHCC considers the schedule given in the TDR and the list of milestones in the ancillary document to be reasonable. They will be used by the Committee to measure and regulate the future progress of the project.

    10. ATLAS HIGH-LEVEL TRIGGER, DATA ACQUISITION AND CONTROLS TECHNICAL DESIGN REPORT

    The LHCC has completed its scientific, technical, and cost evaluation of the ATLAS High-Level Trigger, Data Acquisition and Controls Technical Design Report submitted in June 2003. The LHCC finds both the technology adopted and the procedures proposed for the ATLAS HLT/DAQ/DCS to be adequate to achieve the physics goals stated in the Technical Proposal and congratulates the ATLAS Collaboration on the work presented in the TDR.

    The Committee has no major concerns. An ancillary document (LHCC 2003-069) contains items of lesser concern as well as a list of agreed milestones for monitoring the progress of the project. The LHCC review was not an engineering review, although some engineering aspects of the project were presented and discussed with the referees. The LHCC recommends that ATLAS follows the established practice of conducting independent reviews of the engineering designs. Written reports should be made available to the LHCC through its referees.

    Recommendation

    The LHCC recommends general approval of the ATLAS High-Level Trigger, Data Acquisition and Controls Technical Design Report. The LHCC considers the schedule given in the TDR and the list of milestones in the ancillary document to be reasonable. They will be used by the Committee to measure and regulate the future progress of the project.

    11. ALICE ADDENDUM TO THE PHOTON MULTIPLICITY DETECTOR TECHNICAL DESIGN REPORT

    The LHCC has completed its scientific and technical evaluation of ALICE Addendum to the Photon Multiplicity Technical Design Report submitted in September 2003. The LHCC congratulates the ALICE Collaboration for the work presented in the Addendum. The overall detector in its new location has a sound technical design. Its construction will benefit strongly from the experience gained in building a similar detector for the STAR experiment at RHIC.

    The Committee has no major concerns. An ancillary document (LHCC 2003-067) contains items of lesser concern as well as a list of agreed milestones for monitoring the progress of the project. The LHCC review was not an engineering review, although some engineering aspects of the project were presented and discussed with the referees. The LHCC recommends that ALICE follows the established practice of conducting independent reviews of the engineering designs. Written reports should be made available to the LHCC through its referees.

    Recommendation

    The LHCC recommends general approval of the ALICE Addendum to the Photon Multiplicity Detector Technical Design Report, pending a final cost evaluation. The LHCC considers the schedule given in the TDR and the list of milestones in the ancillary document to be reasonable. They will be used by the Committee to measure and regulate the future progress of the project.

    12. REPORT FROM THE RD39 REFEREE

    The LHCC heard a report from the RD39 referee on the collaborationís programme concerning the operation of solid-state detectors at low temperatures and in a high radiation background environment. The referee summarised the experimental results that RD39 has achieved on the operation of such detectors and also described the proposed programme for future work.

    The Committee took note of the good progress in the development of such cryogenic silicon detectors for applications in future high energy physics experiments. In particular, edgeless silicon detectors have been produced and tested successfully in test beams and the Lazarus Effect, whereby the reduction in charge collection efficiency after irradiation is restored by operating the detectors at cryogenic temperatures, has been understood. Moreover, RD39 has developed operational beam telescopes in conjunction with the NA60 and COMPASS collaborations.

    The LHCC considers the proposed research programme for 2004, concentrating on the measurement of edgeless strip silicon detectors in test beams, the testing of pad detectors irradiated up to 1016 part./cm2, the characterisation of CMS Tracker hybrids and sensors at low temperatures, the development of a set-up to characterise the detectors during irradiation, the implementation of additional cryogenic stations for COMPASS, and studies on avalanche photodiodes operating at cryogenic temperatures, to be reasonable. The Collaboration is, however, asked to submit a detailed list of milestones for the planned activities in 2004.

    In view of this and given the modest request for resources to further the work, the referee recommends that the R&D project be continued in 2004. A status report is expected to be submitted to the LHCC in one yearís time. The Committee agrees to the continuation of the project on this basis.

    13. REPORT FROM THE RD42 REREREE

    The Committee heard a report from the RD42 referee on the collaborationís programme of developing intrinsically radiation-hard CVD diamond devices. Good progress was reported for the past year. In particular, RD42 has shown that diamond crystals are a feasible option for the development of pixel, diode and strip tracking detectors for high energy physics experiments. The Committee also took note of the successful extensions of applications to beam monitoring and beam abort systems for such experiments and tests to do very fast single particle counting for hadron therapy facilities.

    The LHCC considers the proposed research programme for 2004, focusing on the further development of the best grade polycrystalline and single crystal CVD diamond material in collaboration with the commercial partner, to be reasonable. The Collaboration is, however, asked to submit a detailed list of milestones for the planned activities in 2004.

    In view of this and given the modest request for resources to further the work, the referee recommends that the R&D project be continued in 2004. A status report is expected to be submitted to the LHCC in one yearís time. The Committee agrees to the continuation of the project on this basis.

    14. REPORT FROM THE RD50 REFEREE

    The LHCC heard a report from the RD50 referee on the collaborationís programme concerning the development of radiation hard semiconductor devices for very high luminosity colliders. The referee summarized the experimental results that RD50 has achieved on the development of such detectors and also described the proposed programme for future work.

    The Committee took note of the good progress in the development of such semiconductor devices for applications in future high energy physics experiments such as those at an upgraded LHC. In particular, key milestones set at the outset of the project have been fulfilled, including the development of common test structures, the improved understanding of defects, and the establishment of the operational limits of the detectors. The LHCC considers the proposed work plan across all areas ó defect and material characterisation, defect engineering, pad detector characterisation, new materials, new test structure and full detector systems - for 2004 to be reasonable.

    Concerns expressed at the previous review of RD50 in 2002 regarding the focus of activities, uncertainties on the development of 3D detectors and the limited experience with detectors and electronics for high energy physics experiments, have since been partially allayed.

    In view of this and given the modest request for resources to further the work, the referee recommends that the R&D project be continued in 2004. A status report is expected to be submitted to the LHCC in one yearís time. The Committee agrees to the continuation of the project on this basis.

    15. REPORTS ON THE LETTER OF INTENT - `MEASUREMENT OF PHOTONS AND NEUTRAL PIONS IN THE VERY FORWARD REGION OF THE LHCí

    The Committee heard reports on the Letter of Intent proposing the measurement of photons and neutral pions in the very forward region of the LHC.

    Knowledge of the energy distribution of particles emitted in the very forward region is necessary for the understanding of cosmic ray phenomena. The proposed experiment aims to establish the energy spectrum of particles emitted in the very forward region at a much higher nuclear interaction energy region than the former UA7 case. This should provide calibration of Monte Carlo simulation codes at high energies so as to explore the Greisen-Zatsepin-Kuzumin (GZK) cut-off region.

    The referees reported that no major integration problems were identified with the LHC machine. Although the experiment, if approved to run at the LHC, might delay the start of the other physics programmes, it will do so by not more than a few days. Scheduling of this experiment should take into account the overall physics priorities of the LHC programme.

    The referees will provide a set of questions that are considered central to further discussion of the proposal at the LHCC. The proponents of the Letter of Intent are invited to address these issues at the January 2004 Closed Session of the LHCC.

    16. REPORT ON THE TOTEM PROPOSAL FOR A MEASUREMENT WITH A ROMAN POT IN THE SPS

    The TOTEM referee reported on the proposal to test the first Roman Pot prototype in the SPS ring during 2004. The test has the goal of checking the following issues before final installation in the LHC:

  • Test of the Roman Pot mechanics, of the local control and of the interface to the SPS (later to the LHC) control system.
  • Test of the radiation-hard edgeless silicon detectors and their associated read-out chain.
  • Test of the performance of the first level trigger.
  • Study of the influence of the passing proton bunches on the silicon detectors and its related electronics installed inside the Roman Pots.
    The LHCC acknowledged the interest of the proposed programme and recommended conditional approval pending resolution of the following issues:
  • Implication of the planned tests on the SPS. This should be discussed with the SPS machine and vacuum groups.
  • Detailed planning of the tests including which type of silicon detector is to be studied and under what conditions.
  • Written memoranda, agreed with the SPS machine and vacuum groups, on the respective responsibilities and including clarification of aperture questions, extent of support from the vacuum group, beam parameters and running time.
  • Scheduling of the tests in view of other requests from LHC and SPS experiments.
    The Committee will re-discuss the proposal at its January 2004 session and in the meantime encourages the TOTEM Collaboration to proceed with preparations for the tests.

    The LHCC also noted that the TOTEM Collaboration will submit for the January 2004 session its Technical Design Report.

    17. TEST BEAMS

    The SPS and PS Coordinator gave a report on the LHC test beams.

    He concentrated on the October and November running periods. He reported that the irradiation and fast extraction tests at the PS East Hall and the SPS Indium run were successful.

    He summarised the performance of the SPS and PS machines for 2003. Several problems were reported in the machines, including two faulty main dipole magnets in the PS main ring, a malfunctioning transformer for the PS East Hall and serious vacuum problems in the SPS, each of which resulted in a stop for physics. The year 2003 also saw the launch of the SPS and PS consolidation programme leading up to the start-up of the LHC operation in 2007. A number of successful machine development periods were reported on, including the first TT40 injection tests and the test of an LHC-type beam with 75 ns bunch spacing intended for the initial running in the first year of LHC operation.

    Finally, he presented the approved SPS and PS Complex machine schedules for 2004. The SPS proton run is scheduled for the period 10 May to 29 October and includes two 1-week periods of 25 ns running in early June and early October while the PS East Hall will run for a 24-week period starting on 3 May and ending 1 November. The end of physics in 2004 also sees the end of particle beams to the West Area. The GIF will, however, continue to run with source only. Finally, no SPS and PS beams will be available in 2005, and the accelerator complex will re-start in spring 2006. The user schedules are being prepared.

    18. REFEREES

    Following the changes to the LHCC membership, the new referee teams are as follows:

    ALICE: S. Bertolucci, P. Seyboth, C. Vallée (Co-ordinator)

    ATLAS: A. Ceccucci (Co-ordinator), M. Jaffre, V. Kekelidze, T. Wyatt

    CMS: Y.-K. Kim, J. Martin (Co-ordinator), P. McBride, H. Tiecke

    LHCb: K. Borras, F. Ferroni, Y. Karyotakis (Co-ordinator)

    TOTEM: K. Borras

    MOEDAL: F. Ferroni

    RD39: H. Tiecke

    RD42: V. Kekelidze

    RD50: C. Vallée

    LCG: F. Ferroni, P. McBride, T. Wyatt

    19. DATES FOR LHCC MEETINGS

    Dates for 2004:

    28-29 January
    24-25 March

    12-13 May

    30 June - 1 July

    29-30 September

    24-25 November

     
    The LHCC received the following documents:
     
  • ALICE Installation Review (LHCC 2003-040/G-48)*
  • ATLAS Installation Review (LHCC 2003-041/G-49)*
  • CMS Installation Review (LHCC 2003-042/G-50)*
  • LHCb Installation Review (LHCC 2003-043/G-51)*
  • ALICE Physics Performance Report Vol. 1 (LHCC 2003-049)
  • Cost Evaluation: ATLAS High Level Trigger ó DAQ System (LHCC 2003-051/G-57)*
  • Cost Evaluation: The Reoptimized LHCb-Detector (LHCC 2003-052/G-58)*
  • Cost Evaluation: TDR on the LHCb Trigger System (LHCC 2003-053/G-59)*
  • Cost Evaluation: Changes to the CMS ECAL electronics (LHCC 2003-054/G-60)*
  • Proceedings of the Ninth Workshop on Electronics for LHC Experiments (LHCC 2003-055/G-61)
  • Letter of Intent: Measurement of photons and Neutral Pions in the Very Forward Region of the LHC (LHCC 2003-057/I 12)
  • RD50 Status Report 2002/2003 (LHCC 2003-058/RD-02)
  • Addendum to the LHCb RICH TDR (LHCC 2003-059/LHCb TDR 3 Add. 1)
  • RD39 Status Report (LHCC 2003-060/RD-03)
  • TOTEM: Proposal for a measurement with a Roman Pot in the SPS (LHCC 2003-061/G62)
  • RD42 Status Report 2003 (LHCC 2003-063/RD-04)
  • Review of the LHCb reoptimized detector design and performance TDR (LHCC 2003-064/G-63)*
  • LCG Comprehensive Review (LHCC 2003-065/G-64)*
  • Review of the LHCb Trigger TDR (LHCC 2003-066/G-65)*
  • Review of the ALICE PMD TDR (LHCC 2003-067/G-66)*
  • Review of the ATLAS High-Level Trigger, Data Acquisition and Controls TDR (LHCC 2003-069/G-67)* * restricted circulation   Emmanuel Tsesmelis
    Eómail: LHCC.Secretary@CERN.CH
    Tel. 78949, 164057
    LHCC Secretariat: Janet Grant (Bldg. 14/4-022) Tel. 73424
                                   janet.grant@CERN.CH