Interface between FP420 and LHC (seen from LHC)

1. Interfacebetween FP420 and LHC(seen from LHC) FP420 meeting 11-Dec-2006

2. Scope • List domains with machine interference or interfaces • Highlight domains which need development • Identify groups/persons who should or do already work on the subjects • Indicate possible strategies to advance towards efficient solutions • Obtain input to clarify the requirements FP420 work package Detlef Swoboda

3. Outline • Cryostat design and integration • Vacuum integration • Beam monitoring instrumentation • Detector alignment integration • Remote positioning control • Services integration • Radiation issues FP420 work package Detlef Swoboda

4. Cryostat design strategy • Concept shall allow full assembly on surface • Separation of Cryostat, Detector requirements, transport issues • Reinforcements for transport could be removable • Minimize additional developments • Reuse existing components; i.e. ATM, tooling • Integration of DFB transport boogies in cryostat design • Include TS-SU already at cryostat design stage!! FP420 work package Detlef Swoboda

5. Cryostat design and integration • Design, calculations, manufacturing • Design under the responsibility of T. Renaglia (presentation) • Manufacturing issues discussed by R. Folch (presentation) • Cryogenic compatibility, interconnection assured by A. Poncet and T. Collombet (presentation) • Concept mono-bloc design • Allows full assembly and detector fitting and testing in workshop. • Reduces installation time substantially. • Reduces time for contingencies. FP420 work package Detlef Swoboda

6. Cryostat design and integration • Installation; i.e. assembly, commissioning, transport, connection, alignment(Patm/vacuum) • Transport studies conducted by TS-IC • Alignment issues followed by TS-SU • Separate detector support from cryostat • 4 reference points shall be placed above cryostat feet • Detector support tables (3 feet layout) with 2 reference points + inclinometer FP420 work package Detlef Swoboda

7. Transport • Detailed study of installation and handling by TS-IC starting no earlier than March 2007 • Includes also • estimation of dismantling and reinstallation effort • Routing simulation • Possible access points: • Point 6 to install in sector 4-5 and 5-6 • Inclination of cryostat required for lowering • SMI2/PX24 to install in sector 8-1 and 1-2 • Cryostat can be lowered horizontally FP420 work package Detlef Swoboda

8. Transport (cnt’d) • Transport and insertion w/DFB boogies ok. • No additional tooling required. • Required times: • 1 day lowering and passage over machine. • 0.5 days/LHC sector (1 km/h) • 0.5 days translation and insertion • Alternatives: • Interleave tunnel transport sector/sector with machine activities • Lower and store cryostats close to installation location ahead of time FP420 work package Detlef Swoboda

9. Vacuum integration • H-pipe design & integration • F. Roncarolo study RF effects; i.e. Cu, Neg coating (presentation) • Installation • Supports, connections, instrumentation • Bake-out, vacuum, temperature • Alignment, pipe movement FP420 work package Detlef Swoboda

10. Beam monitoring instrumentation • BPM design & integration • Choice of type inside electrodes (good linearity, lower S/N) ceramic body, electrodes outside (small linear range, high S/N) • Study should be requested to AB/BI • RF eng. or equivalent required for electronics design and mechanical design follow up. • L Soby (pending agreement w/hierarchy) available @ ± 10 % • Interface with beam pipe & WPS • Precision, calibration • New calibration stand @ AB/BI 100 nm resolution, ≤ 500 nm precision • Response time (b-b) • Electronics tbd from scratch Work already ongoing in AB/BI (EuroTEV) FP420 work package Detlef Swoboda

11. Detector alignment integration • Choice (WPS) • Layout, integration • Electrical insulation of WPS pick-up • Monitoring • LHC implementation via WorldFip – turnkey system • Precision relative dielectric permittivity (εr) function of dose rate. Resolution < 1 μm Uncertainty w.r.t. wire ± 3 μm + 1 μm/month • Response time • LHC implementation 1 Hz • Impact on Detector maintenance • Radiation tolerance • ≤ 300 MGy for sensors • ≤ 500 Gy for electronics (max. distance from sensors ≤ 30 m) FP420 work package Detlef Swoboda

12. Low β triplet WPS FP420 work package Detlef Swoboda

13. Remote positioning control • Design & integration of detector positioning system  UCL • Coupling to BPM & WPS  Mimmo • H/V movement • Cryostat in region of max β • Vertical beam uncertainty ± 2 mm (machine stability limit) • Uncertainty from remnant field, magnet memory (snap back) • Control system architecture & implementation • Interlocks • Risk analysis for beam accident scenarios • Fast movement of closed orbit • Control failure of detector positioning system FP420 work package Detlef Swoboda

14. Services and Instrumentation • Tunnel Structure Working Group • Specify requirements for cabling and piping • Launch integration study in LHC • Schedule pre-installation of services • Reserve installation space • Distances detector to near electronics/supplies • 2 possible locations • Underneath nearby machine magnets • Tunnel wall @ service electronics space reservation • Undertake radiation calculations for FP420 sector • Cryostat and detector shielding • Select adequate instrumentation • Radiation issues FP420 work package Detlef Swoboda

15. Ø 4400 Sect 1 FP420 work package Detlef Swoboda

16. Ø 3800 Sect 5 FP420 work package Detlef Swoboda

17. Radiation issues • Beam line shielding • Protection required for LHC instrumentation under magnets and Q11 magnet: • Lead shielding around beam pipe (also protect detectors) • SS shield (2 half cylinders) around beam pipe. Best location probably inside ATM. • Full radioactivity calculation necessary • New cryostat • Necessary shielding • Choice of instrumentation, electronics • Location of instrumentation • Enquiry of space in low radiation area? • Maintenance interventions • Activation issues and radio protection FP420 work package Detlef Swoboda

18. Radiation Environment RADIATION ENVIRONMENT IN THE MAIN RING OF THE LHC Claire A. Fynbo (EST-LEA), G. R. Stevenson (TIS-RP) LHC Project Seminar, 22-11-2001 Based on LHC version 6.1 FP420 work package Detlef Swoboda

19. Annual dose in the DS downstream of the high-luminosity insertionsIP1 & IP5 • Full annual dose maps from Point loss and beam-gas interaction contributions exist for DS1 & DS5 • Doses alongside the magnet string • Doses under the magnet string • Doses in the floor • Doses in the tunnel surrounding the magnets (maximum - Q11 & MB9B) • Doses to magnet components (maximum - Q11 & MB9B) • Maximum doses to magnet coils FP420 work package Detlef Swoboda

20. Proton Loss Density in DS Regions FP420 work package Detlef Swoboda

21. Annual Dose in DS1 (Gy/yr) FP420 work package Detlef Swoboda

22. Annual Dose in DS5 (Gy/yr) FP420 work package Detlef Swoboda

23. Max. Annual Dose (Gy) FP420 work package Detlef Swoboda

24. Summary of annual dose in DS • The expected dose distributions of DS1& DS5 are very similar. • Higher annual doses are expected alongside magnets (in beam-axis plane) than underneath magnet string, with the highest doses alongside the outside of the LHC ring. • High dose areas are limited to a few localised regions in the string: alongside magnets MB9B-Q9 reaching values ~200 Gy/y, and near the missing magnet & Q11: here very high annual doses will be observed. • Other regions will see doses << 100 Gy/y ⇒ regions with comparable doses to arc sections can be found. • Radiation hard equipment will be needed to survive conditions in certain sections of the DS. • Generally if equipment to be installed in DS1/5 is able to withstand doses of ~few hundred Gy/y, then it should survive LHC operation. • But, some localised regions (MB9/missing magnet/Q11) could see doses reaching 1000s Gy/y ⇒ problem spots !!!! • For equipment to be placed under the magnet string, then a tolerance limit of 1000 Gy should ensure survival for 10 years of machine operation at all locations under the magnet string except in the vicinity of the missing magnet. Here equipment will have to survive levels of 1000 Gy/y !!! FP420 work package Detlef Swoboda