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LINAC4 Beam Coordination Committee Design Status

This document provides the preliminary design and layout of the LINAC4 beam coordination committee, including configuration, layout, support systems, vacuum devices, and beam pipes.

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LINAC4 Beam Coordination Committee Design Status

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  1. LINAC 4 ProjectL4T/L4Z Design StatusJ.Humbert / B.Riffaudon behalf of EN-MME design team 1st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

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

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

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

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

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

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

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

  9. Preliminary design – Supports Type LINAC4 intertank Type LINAC4 LEBT Supports for beam pipes (preliminary design accepted by TE/VSC) Supports for quadrupoles/steerers/instrumention (alignment principle accepted by BE/ABP) 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). 1st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

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

  11. Beam pipes detailed design – Requirements • 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) • Insulation layer between beam pipes and pulsed magnets. • 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) 1st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

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

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

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

  15. Beam pipes detailed design – Beam clearance 1st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

  16. Beam pipes detailed design – Pipes dimensions 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). 1st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

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

  18. 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 1st September 2011 LINAC4 – BEAM COORDINATION COMMITTEE B.Riffaud

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