1. LINAC 4 Project L4T/L4Z Design Status J.Humbert / B.Riffaud on behalf of EN-MME design team 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

2. Design input data – Layout Layout & naming frozen by C.Carli & S.Weisz 24/08/2011 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

3. Zone 1 Preliminary design – Configuration Zone 3 Zone 4 Zone 5 L4Z Zone 2 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Machine integration inputs: Jean-Pierre Corso

4. Preliminary design – Layout Zone 1 + L4Z to dump 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud MBH.0250 Dump Beam pipe support Modular support Steerer Feshenko SEM grid Pick-up BCT Pumping unit Alignment jack EMQ Sector valve

5. Preliminary design – Layout Zone 2 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud MBH.0250 Bellow Support table SteererSEM grid Quadrupole Alignment jack MBH.0450 MBH.0650 Beam pipe

6. Preliminary design – Layout Zone 3 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud MBH.0650 Beam pipe support Modular support Steerer Beam stopper Pick-up BCT Pumping unit Alignment jack MBV.1250 Debuncher cavity Beam pipe support Quadrupole Bellow

7. Steerer MBV.1550 Quadrupole Bellow Pick-up BCT Sector valve LT.BHZ20 Preliminary design – Layout Zone 4 & 5 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud MBV.1550 Support structure Steerer Pumping unit Alignment jack QuadrupoleMBV.1250 Bellow

8. Preliminary design – Supports 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Detailed design of the support system to be finalized once the interface with bending magnets will be frozen (contact between EN-MME & T.Zickler). LINAC4 support jack type 2.5 tons (pre-series manufacturing process ongoing) MBH support configuration LINAC4 jacks 2.5 tons have been selected for support & alignment of MBH and MBV magnets. MBV support configuration

9. Preliminary design – Supports 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Detailed design of these supports to be finalized once the interfaces with components will be frozen (beam pipes, magnets, beam instrumentation - Contact between EN-MME & equipments responsible). Alignment targets centers to be positioned in the beam vertical plane (requirement from BE/ABP). Supports for beam pipes (preliminary design accepted by TE/VSC) Supports for quadrupoles/steerers/instrumention (alignment principle accepted by BE/ABP) Type LINAC4 intertank Type LINAC4 LEBT

10. Preliminary design – Vacuum devices 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Detailed design of these components ongoing Pumping module Tube Ø100/103 or Ø50/53 (preliminary design accepted by TE/VSC) Bellow module 10 waves Tube Ø100/103 or Ø50/53 (preliminary design accepted by TE/VSC) (compatibility with alignment tolerances to be validated) Support for beam pipes Vacuum gauges port Ion pump Pumping unit port Valve

11. Beam pipes detailed design – Requirements 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud  Magnets aperture (data fromT.Zickler) EMQ : Ø54 ±0.05 mm MQF/MQD : Ø100 ±0.05mm MBH/MBV : Aperture height 56 ±0.05mm Steerers : Ø101 ±0.1mm  Beam clearance : “as big as possible, not less than Ø95”. (to be urgently confirmed) Main consequences on mechanical design: Very tight gap between the magnets apertures and the beam pipes. Very tight gap between the beam clearance and beam pipes internal diameter. Precise alignment required  Beam pipes need to be fixed on magnets. (this is not possible for steerers)  Insulation layer between beam pipes and pulsed magnets.

12. Beam pipes detailed design – Configurations 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Manufacturing tolerances values validated by CERN Main Workshop.

13. Magnet aperture tolerance Pipe alignment tolerance wrt. magnet Pipe insulation thickness Pipe thickness + manufacturing tolerances Beam clearance 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Pipe deformation due to vacuum Beam pipes detailed design – Beam clearance Configuration for bendings & quadrupoles (beam pipes fixed on magnets) Beam pipe Magnet Beam axis

14. Beam pipes detailed design – Alignment tolerances Table given by A.Lombardi Alignment tolerances : 3 sigma 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

15. Beam pipes detailed design – Beam clearance EMQ (mm) MQF/MQD (mm) MBH/MBV (mm) Magnet apertureØ54Ø10056 Magnet aperture tolerance0.05 Pipe alignment tolerance wrt. magnet0.25 Pipe insulation thickness111 Pipe thickness334 Pipe manufacturing tolerances0.61.22.4 Deformation due to vacuum002 Alignment tolerance (3 sigma)1.2 3 Beam ClearanceØ47.9Ø93.343.3

16. 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Beam pipes detailed design – Pipes dimensions EMQ (mm) MQF/MQD (mm) MBH/MBV (mm) Beam pipe external size (nominal)Ø52.4Ø98.153.5 Beam pipe internal size (nominal)Ø49.4Ø95.149.5 Beam pipe length2057501780 Manufacturing tolerance (t)0.61.22.4 Special size manufacturingyes Important No standard size for beam pipes : Cost x10 Some sectors of the line ( ~ 30 meters, including pumping units and bellows) could be installed with standard beam pipes (Ø100/103).

17. ±0.6 ±1.5 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Beam pipes detailed design – Beam clearance Beam clearance reduction due to steerers misalignment (1÷3 sigma) (accepted alignment tolerance : 3 sigma) Steerer Quadrupole Bellow Beam pipe Beam clearance inside MQ (Ø93 mm)

18. 1 st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud Conclusions L4T/L4Z layout frozen. Very tight margin between required beam clearance and magnet apertures  important consequences on mechanical design: Beam pipes fixed on magnets. Bendings and steerers to be aligned at 1 sigma to avoid a decrease of the beam clearance? Beam pipes to be aligned ? (to be checked) Special size for beam pipes (cost x10). Beam instrumentation interfaces to be frozen as soon as possible. Deadline for L4T/L4Z supports and beam pipes drawings : End 2011