1. 28/09/2006MG – ABP General meeting1 HIGHLIGHTS OF LOC ACTIVITIES IN 2006 M. Giovannozzi on behalf of LOC members Ralph Assmann Chiara Bracco Helmut Burkhardt Riccardo de Maria Stéphane Fartoukh Jean-Bernard Jeanneret Alex Koschik Lionel Neukermans Yannis Papaphilippou Thys Risselada Guillaume Robert-Demolaize Federico Roncarolo Frank Schmidt Thomas Weiler

2. 28/09/2006MG – ABP General meeting2 Summary LHC Magnets activities LHC optics LHC MAD-X on-line model Software tools for beam dynamics simulations LHC Commissioning Collimation Team

3. 28/09/2006MG – ABP General meeting3 LHC Magnets activities - I LHC Magnet Team: S.Fartoukh, J.-B. Jeanneret, Y. Papaphilippou, F. Schmidt, M. Giovannozzi (with support from S. Gilardoni - LII). Structure: each team member is responsible for a set of magnets’ classes S. Fartoukh: main dipole and Activity Leader Y. Papaphilippou: main quadrupoles F. Schmidt: low-beta triplets M. Giovannozzi: insertion magnets (dipoles and quadrupoles) and MEB secretary J.-B. Jeanneret: aperture expert and consultant for all magnet classes S. Gilardoni: support for main dipoles geometry. Results of studies reported at Magnet Evaluation Board, where each magnet is assigned to a specific slot in the LHC ring defining optimised installation sequence.

4. 28/09/2006MG – ABP General meeting4 LHC Magnets activities - II Aim: improve/optimize machine performance Approach: use mechanical/geometrical data and measured field quality to define slot in the machine.

5. 28/09/2006MG – ABP General meeting5 Flip-flop and  –pairing on b3 in sector 78 and 34 Sector 78: ap. V1Sector 34: ap. V2 Few Xs3’s Xs1 Noell magnets Alstom and Ansaldo with very low b3. Typical  -pairing + flip-flop S. Fartoukh, MEB107

6. 28/09/2006MG – ABP General meeting6 LHC Magnets activities - III Results (approval status): Main dipoles: 83% approved (1018 MBs) Main quadrupoles: 84% approved (301 SSS) Low-beta triplets: 83% approved (20 MQX) Insertion magnets: D1 (cold and warm) -> 100% approved D2 -> 75% approved D3/D4 (cold and warm) -> 100% approved Warm quadrupoles -> 100% approved Other insertion quadrupoles -> 59% approved The expertise will be used for the commissioning!

7. 28/09/2006MG – ABP General meeting7 LHC optics - I The section is also responsible for the optics of the machine, the official database (both machine and transfer lines) Insertion optics responsible: IR1/IR5 (ATLAS/CMS): S. Fartoukh special high-beta configurations, e.g., TOTEM: H. Burkhardt. FP420: F. Roncarolo IR2 (ALICE): J. Jowett (LII) IR3/IR7 (Collimation IRs): T. Risselada IR8 (LHCB): Y. Papaphilippou IR4/IR6 (RF and beam dump IRs): M. Giovannozzi LHC injection: H. Burkhardt, A. Koschik and T. Risselada

8. 28/09/2006MG – ABP General meeting8 LHC optics - II The official optics database is maintained by T. Risselada -> /afs/cern.ch/eng/lhc/optics/V6.500. The official web pages are generated by J. Jowett -> http://cern.ch/lhcoptics. They allow functional access (via Java, Excel, etc.) to the optics MAD files, aperture model and pre-calculated optics data across the Internet http://cern.ch/lhcoptics IR2, Beam 1 envelope

9. 28/09/2006MG – ABP General meeting9 LHC optics - III Some results: Finalisation of V6.500 optics (including aperture model). Computation of the complete squeeze sequence for IR1/5 including also crossing scheme. Analysis of the optics for the special configuration for the 450 GeV run in 2007. Computation of a special “flat beam” optics for IR1/5 allowing luminosity increase Preparation of the sequence for Beam 2 for tracking (long-standing issue) Work in progress: New optics for IR3/7? On top of the linear optics activities, numerical simulations (tracking) absorb quite some resources (also for IR upgrade studies -> R. de Maria)! Efforts to improve routines to assign magnetic errors and possibility to use magnetic errors from database (joint enterprise with AT/MAS). Misalignment errors will come (soon). Study of beta-beating using measured magnetic errors (R. Tomás – RLC - and R. Calaga)   =11m (injection optics with phase shift  x/y =0.015/0.005 to accomodate the collision tune)   =0.55m   =1.5m   =4m   =5m   =7m

10. 28/09/2006MG – ABP General meeting10 LHC MAD-X on-line model One of the tasks of the section is also to prepare an on-line model for the LHC in view of machine commissioning and operation Responsible: F. Schmidt with contributions by W. Herr First milestone: CNGS commissioning. Results: validation of software tools. SDDS is now in MAD-X. Analysis of missing items. In the future, the SPS will be used as test bed for additional tests.

11. 28/09/2006MG – ABP General meeting11 Software tools for beam dynamics simulations Responsibility for the main simulation programs, MAD-X and SixTrack-> F. Schmidt is the custodian. Level of support changed in order to cope with other tasks (MAD-X on-line model). Polymorphic Tracking Code fully embedded in MAD-X to provide functionalities for the on-line model (thanks also to É. Forest). The generic tracking environment was developed by F. Schmidt with contributions from E. McIntosh. This allows running simulations on: CERN lxplus cluster CERN CPSS (your PC once it is inactive) BOINC (PC cluster world-wide) and GRID

12. 28/09/2006MG – ABP General meeting12 LHC Commissioning People involved: Future Commissioner in Charge: R. Assmann, S. Fartoukh, M. Giovannozzi. Responsible for experimental backgrounds : H. Burkhardt System responsible/support (machine, instrumentation etc.): almost all LOC member will contribute to these efforts… Last but not least…we contribute to many Committees and working Groups: Collimation Working Group Field Quality Working Group LHC Commissioning Working Group LHC Technical Committee LHC Technical Coordination Committee Machine Protection Working Group Magnet Evaluation Board Working Group on Alignment

13. 28/09/2006MG – ABP General meeting13 Collimation Team Members: R. Assmann (LHC Collimation PL), C. Bracco, G. Robert-Demolaize, (S. Redaelli is still contributing), T. Weiler. Main tasks: evaluation of the performance of the collimation system and operational procedures.

14. 28/09/2006MG – ABP General meeting14 First LHC Collimators Produced and Installed… First ring collimator in 8L. (triplet protection for beam 1) - June 14 th - 10 minutes installation: checking on quick- plugs… Courtesy R. Assmann

15. 28/09/2006MG – ABP General meeting15 Beam1 and Beam 2 Loss Simulations Beam1, 7 TeV Betatron cleaning Ideal performance Beam2, 7 TeV Betatron cleaning Ideal performance TCDQ Quench limit (nominal I,  =0.2h) Local inefficiency:New! Local inefficiency: #p lost in bin over total #p lost over length of aperture bin! New! Quench limit (nominal I,  =0.2h) Local inefficiency [1/m] Courtesy R. Assmann