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