1. MDI towards technical design Lau Gatignon

2. Very preliminary ! To trigger discussions

3. MACHINE DETECTOR INTERFACE Plus others ……….. IP Feedback Beamcal+ Lumical Anti-solenoid Vacuum QD0 quadrupoles Support tubes +Stabilization + prealignment

4. CONTENTS • Introduction • QD0 Magnet • Stabilization • QD0 support & pre-isolation • Pre-alignment • IP-Feedback • Anti-solenoid • Instrumentation • Vacuum • Overall integration • Safety • Backgrounds • Other issues

5. R.Stapnes @ ACE meeting 2 February 2011

10. MDI MEMBERS R.Appleby, A.Apyan, B.Bartalesi, M.Battaglia, E.Bravin, H.Burkhardt, P.N.Burrows, F.Butin, B.Dalena, K.Elsener, A.Gaddi, M.Gastal, L.Gatignon, H.Gerwig, C.Grefe, E.Gschwendtner, M.Guinchard, A.Hervé, A.Jérémie, Th.Lefèvre, L.Linssen, H.Mainaud-Durand, S.Mallows, M.Modena, J.Osborne, Th.Otto, C.Perry, F.Ramos, J.Resta Lopez, A.Sailer, H.Schmickler, D.Schulte, N.Siegrist, J.Snuverink, E.Solodko, R.TomasGarcia, D.Tommasini, R.Veness, J.Vollaire, A.Vorozhtsov, V.Ziemann, F.Zimmermann

11. QD0 Magnet M.Modena, A.Vorozhtsov, A.Bartalesi, E.Solodkoet al

12. QD0 Magnet • Construct and test short prototypeGradient, field quality, vibration modes, radiation hardness, impact of external fields • Finalize design, construct and test full length models of QD0 and QF1Gradient, field quality, stability • Design and build field measurement device for long and small apertures with required precision • Tests some prototype in beam line (ATF2, CERN-NA or other)In collaboration with stabilization team

13. SS QD0 Stabilisation A.Jeremie et al (LAPP/Annecy)

14. Stabilization • Finalize choice of sensors (relative and absolute) and actuators • Analyze vibrational modes of final QD0 magnet and optimize stabilization strategy accordingly • Design and validate design of stabilization foot • Finalize integration in support tube • Simulation and test in realistic environment of stabilization performance • Cooperation with other luminosity stabilization systemsincluding data communication with other systems • Stabilisation for L* = 6 m solution

15. QD0 Support and Pre-isolator A.Gaddi, H.Gerwig, F.Ramos et al

16. QD0 support and pre-isolation • Finalize analysis and tests with pre-isolator prototype • Based on these results, finalize design of full-scale pre-isolator • Finalize design of QD0 support tubes, taking into account constraints from integration • Construct and test one pre-isolator + support tube assembly and validate performance • Combined test with stabilized QD0

17. P Pre-alignment (including QD0) H.Mainaud-Durand et al

18. Pre-alignment • Execute agreed work packages with NIKHEFComplete/update CDR chapter accordingly • Test and validate rigidity of CAM mover system and demonstrate compatibility with stabilization requirements • As a result make full simulation of RASNIK system with realistic light transport channels through detector • Validate stretched wire approach for 500 m length • Full design of stretched wire system, compatible with integration and push-pull constraints.

19. IP-Feedback Ph.Burrows, J.RestaLopez et al

20. IP Feedback • Continue tests and design to optimize latency • Optimize feedback algorithms One or two sides, sensitivity to background (using detector MC) • Continue full simulations, including other feedback and feed-forward systems and isolation + stabilization • Studies of radiation hardness and B-field tolerance • Final engineering, taking into account integration constraints • Solution for L*= 6 m implementation of QD0

21. Anti-solenoid B.Dalena, A.Bartalesi, A.Sailer, A.Gaddi, H.Gerwig et al

22. Anti-solenoid • Complete a realistic designConfirm choice of super-conducting technologyGood main solenoid compensation Take into account effect of permendur on field configuration Minimize deformation of main solenoid field • Integration with detector layout and QD0 support • Validate that luminosity performance is adequate • Coupling of anti-solenoid and main solenoid Protection of QD0 (permendur, permanent magnets)

23. Instrumentation • In collaboration with other working groups, arrive at final design and integration of beam instrumentation relevant for the IP • This includes the instrumentation for the IP feedback, but also luminosity monitoring in the post-collision line • Follow-up of discussions related to polarization

24. Vacuum in IR region R.Veness et al

25. Vacuum • Final design of all vacuum systems involved, including specification of all vacuum tubes/tanks, valves and pumps • Calculation of static and dynamic vacuum pressures in BDS, IR and post-collision lines • Validate that the impact on beam dynamics and luminosity is acceptable

26. Integration H.Gerwig and many others

27. Integration • Work out in more detail the L*=6 m backup solution andcompare with L*=3.5 m (luminosity, acceptance, stabilisation, etc) • Follow-up evolution of detector designsFor both detectors or eventual new detector designs In particular impact of changes close to beam • Together with BDS teams, finalize choice of L*Can one agree on a single L*, which one? If needed, is it possible to have two different L* ?Work out solution with QD0 in the tunnel, first conceptually (1 year?), at a later stage also technically.Compare with L* = 3.5 m. • Design and construction of push-pull platforms • Optimize time for push-pull operation • Detailed integration with civil engineering and services

28. Safety • Agree with safety and civil engineering on all general safety aspects in the surface and underground areasFire safety, smoke extraction, ventilation, RP,escape routes, etcetera • Finalize RP simulations with final BDS and detector layoutsAre detectors self-shielding enough? Shielding cavern-garage, ... RP implications (if any) of muon backgrounds from BDS Evaluation of all accident scenarios. Requirements for MPS • Design shielding accordinglyEvaluate whether big shielding doors are necessary. Thickness? • Cryogenic safety issues

29. Backgrounds • Collaborate with BDS, Post-collision line and LCD to evaluate and minimize backgrounds from machine, dumps and IP • Evaluate, together with BDS, the impact of muons and their cleaning on the IR in terms of RP safety and backgrounds • Confirm that Beamcal ad Lumical are sufficient to serve as masks against neutrons from the various dumps • Finalize integration of post-collision line in IR

30. And everything else …….

31. Other issues • Continue to coordinate between different working groupsMagnets, stabilization, post-collision line + dumps, BDS, LCD, CES • Establish link between detectors and CES group for specification of all services and their integration • Work towards full and more precise cost estimate • Provide relevant chapters in Project Preparation Plan • Prepare first version of Safety File

32. Spare slides

34. Stabilization (2) In particular (Annecy groups): • Collaboration model • Continue characterization of vibration environment (correlations) • Continued sensor studies, in particular capacitive gauges and chemical sensors • Continued actuator studies and control loop optimization • Calculations on vibration modes of QD0 and support structures and combine those with pre-isolator and feedback loops in overall simulations • Contribute to integration with other IR equipment, supports, controls, etc (CERN responsibility) • Tolerance studies with respect to external magnetic fields and radiation • Construction of full prototype with test in real life (ATF2 or lab?) • Liaison with MDI and stabilization working groups. Documentation