linac 4 project l4t/l4z design status j.humbert / b.riffaud on behalf of en-mme design team 1 st...

LINAC 4 ProjectL4T/L4Z Design Status

J.Humbert / B.Riffaudon behalf of EN-MME design team

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

Design input data – LayoutEquipment Names Used name

DCUM L4T Integrated (Benoit,Jerome,Jean-Pierre)

Comments Equipment Names Used nameDCUM L4Z Integrated

(Benoit,Jerome,Jean-Pierre)Comments

L4T.VVGS.0101 Sector Valve 155.00 ↔ L4T.VVGS.0101 Sector Valve 155.00

L4T.BCT.0103 Transformer 725.00 ↔ L4T.BCT.0103 Transformer 725.00

L4T.MCHV.0105 Steerer ↔ L4T.MCHV.0105 Steerer

L4T.MQD.0110 1100.00 ↔ L4T.MQD.0110 1100.00

L4T.MCHV.0115 Steerer 2100.00 ↔ L4T.MCHV.0115 Steerer 2100.00

L4T.MCHV.0135 Steerer 3100.00 ↔ L4T.MCHV.0135 Steerer 3100.00

L4T.MQF.0210 4100.00 ↔ L4T.MQF.0210 4100.00

L4T.BSGHV.0223 SEM Grid 4320.00 ↔ L4T.BSGHV.0223 SEM Grid 4320.00

L4T.BPM.0227 Pick-up 4800.00 ↔ L4T.BPM.0227 Pick-up 4800.00

L4T.BPLFS.0233 Feshenko 5550.00 ↔ L4T.BPLFS.0233 Feshenko 5550.00

L4T.BPM.0237 Pick-up 6300.00 ↔ L4T.BPM.0237 Pick-up 6300.00

L4T.BSGHV.0243 SEM Grid 6630.00 ↔ L4T.BSGHV.0243 SEM Grid 6630.00

L4T.MBH.0250 7475.52 Distances relatives / L4T.MBH.0250 ↔ L4T.MBH.0250 7475.52

L4T.MQD.0310 8975.52 1500.00 L4Z.BSGHV.0273 SEM Grid 8340.00

L4T.MCHV.0315 Steerer 9525.52 2050.00 L4Z.VPI.0280 Ion Pump 9060.00

L4T.MQF.0410 10075.52 2600.00 L4Z.VGP.0280 Penning Gauge 9060.00

L4T.MBH.0450 11575.52 Distances relatives / L4T.MBH.0450 L4Z.VGR.0280 Pirani Gauge 9060.00

L4T.MQF.0510 13075.52 1500.00 L4Z.BSGHV.0293 SEM Grid 9780.00

L4T.BSGHV.0523 SEM Grid 13625.52 2050.00 L4Z.TDE.0295 Dump (start) 13442.00 Dump Start = 11942.00

L4T.MQD.0610 14175.52 2600.00 Dump End = 14942.00

L4T.MBH.0650 15675.52 Distances relatives / L4T.MBH.0650

L4T.BCT.0673 Transformer 17065.52 1390.00

L4T.MQF.0710 17675.52 2000.00

L4T.MCHV.0715 Steerer 18375.52 2700.00

L4T.MCHV.0735 Steerer 19375.52 3700.00

L4T.VPI.0740 Ion Pump 22062.52 6387.00

L4T.TDISA.0760 Beam Stopper

L4T.MQD.0810 22975.52 7300.00 QuadrupolesL4T.BPM.0827 Pick-up 25675.52 10000.00

L4T.BPM.0837 Pick-up 27175.52 11500.00 DipolesL4T.MQF.0910 28275.52 12600.00

L4T.MCHV.0915 Steerer 28975.52 13300.00 Vac elementsL4T.MCHV.0935 Steerer 29975.52 14300.00

L4T.MQD.1010 33575.52 17900.00

L4T.VPI.1020 Ion Pump 34494.52 18819.00

L4T.BPM.1027 Pick-up 36575.52 20900.00

L4T.BPM.1037 Pick-up 38075.52 22400.00


L4T.ACDB.1075 41575.52 25900.00

L4T.VPI.1075 Ion Pump 41575.52 25900.00

L4T.MCHV.1085 Steerer 43575.52 27900.00

L4T.MCHV.1095 Steerer 44575.52 28900.00

L4T.MQD.1110 45275.52 29600.00

L4T.MQF.1210 46525.72 30850.20

L4T.BPM.1227 Pick-up 47175.52 31500.00

L4T.VPI.1240 Ion Pump 47864.12 32188.60

L4T.VGP.1240 Penning Gauge 47864.12 32188.60

L4T.VGR.1240 Pirani Gauge 47864.12 32188.60

L4T.VPGF.1240 Fix Pump Group 47864.12 32188.60


L4T.BPM.1237 Pick-up 48675.52 33000.00

L4T.BSGHV.1243 SEM Grid 49280.52 33605.00

L4T.MBV.1250 50525.52 Distances relatives / MBV

L4T.MQD.1310 53025.52 2500.00

L4T.MCHV.1315 Steerer 54275.52 3750.00

L4T.MQF.1410 55525.52 5000.00

L4T.MCHV.1415 Steerer 56775.52 6250.00

L4T.MQD.1510 58025.52 7500.00

L4T.VPI.1520 Ion Pump 59289.52 8764.00

L4T.MBV.1550 60525.52 Distances relatives / MBV


L4T.BPM.1527 Pick-up 62075.52 1550.00

L4T.MQD.1610 62725.52 2200.00

L4T.BPM.1627 Pick-up 63075.52 2550.00

L4T.MCHV.1635 Steerer 63350.52 2825.00

L4T.MQF.1710 63975.52 3450.00

L4T.VVGS.1751 Sector Valve 64495.52 3970.00

LTBHZ20 70936.52 10411.00

Transfer Line - L4T Dump Line - L4Z

Layout & naming frozen by C.Carli & S.Weisz

24/08/2011


Zone

1

Preliminary design – Configuration

Zone 3

Zone 4Zone 5

L4Z

Zone 2


Machine integration inputs: Jean-Pierre Corso

Preliminary design – Layout Zone 1 + L4Z to dump


MBH.0250

Dump

Beam pipe support

Modular support

Steerer

Feshenko

SEM grid

Pick-up

BCT

Pumping unit

Alignment jack

EMQ

Sector valve

Preliminary design – Layout Zone 2


MBH.0250

Bellow

Support table

Steerer SEM grid

Quadrupole

Alignment jack

MBH.0450MBH.0650

Beam pipe

Preliminary design – Layout Zone 3


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

Steerer

MBV.1550Quadrupole

Bellow

Pick-upBCT

Sector valve

LT.BHZ20

Preliminary design – Layout Zone 4 & 5


MBV.1550

Support structure

Steerer Pumping unit

Alignment jack

QuadrupoleMBV.1250

Bellow

Preliminary design – Supports


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

Preliminary design – Supports


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

Preliminary design – Vacuum devices


Detailed design of these components ongoing

Pumping moduleTube Ø100/103 or Ø50/53

(preliminary design accepted by TE/VSC)

Bellow module 10 wavesTube 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

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)

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.

Beam pipes detailed design – Configurations


Manufacturing tolerances values validated by CERN Main Workshop.

Magnet aperture tolerance

Pipe alignment tolerance wrt. magnet

Pipe insulation thickness

Pipe thickness + manufacturing tolerances

Beam clearance


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

Beam pipes detailed design – Alignment tolerances Alignment Precision Position Determination

X,Y (Radial)

Z (Long.)

Roll Pitch and yaw

X,Y (Radial)

Z (Long.)

Roll Pitch and yaw

(1 sigma) (1 sigma) (1 sigma) (1 sigma) (1 sigma) (1 sigma) (1 sigma) (1 sigma)

Chopper line quadrupoles, bunchers, inline dump and chopper plates.

±0.1 mm ±1 mrad 2mrad (probably even more)

Chopper plates are very critical the rest is more forgiving.


Linac quadrupoles(DTL,CCDTL,PIMS)Transfer lines quadrupoles



Steeres and dipoles ±0.5 mm ±2 mrad 2mrad (probably even more)


Diagnostics ±0.5 mm Not relevant

Not relevant

For any passive element it is important to know the position but not necessarily to align, provided of course it doesn’t influence the acceptance of the lines.Transformers and BLMs ±0.5 mm Not

relevantNot relevant

PickUps ±0.3 mm ±0.3 mm Not relevant

Not relevant

SemGrid, Emmitance Meter, & Wire Scanners

±0.3 mm 3-5 degrees

3-5 degrees

Feschenko Beam Shape Monitor

±0.5 mm Not relevant

Not relevant

L4 Element Comments

±0.1 mm ±1 mrad 2mrad (probably

Critical for beam quality. We have 1 corrector / 40

±0.1 mm ±1 mrad 2mrad (probably

Table given by A.Lombardi• Alignment tolerances : 3 sigma




EMQ(mm)

MQF/MQD(mm)

MBH/MBV(mm)

Magnet aperture Ø54 Ø100 56

Magnet aperture tolerance 0.05 0.05 0.05

Pipe alignment tolerance wrt. magnet 0.25 0.25 0.25

Pipe insulation thickness 1 1 1

Pipe thickness 3 3 4

Pipe manufacturing tolerances 0.6 1.2 2.4

Deformation due to vacuum 0 0 2

Alignment tolerance (3 sigma) 1.2 1.2 3

Beam Clearance Ø47.9 Ø93.3 43.3


Beam pipes detailed design – Pipes dimensionsEMQ(mm)

MQF/MQD(mm)

MBH/MBV(mm)

Beam pipe external size (nominal) Ø52.4 Ø98.1 53.5

Beam pipe internal size (nominal) Ø49.4 Ø95.1 49.5

Beam pipe length 205 750 1780

Manufacturing tolerance (t) 0.6 1.2 2.4

Special size manufacturing yes yes yes

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).

±0.6

±0.6

±1.5±1.5



Beam clearance reduction due to steerers misalignment (1÷3 sigma)

(accepted alignment tolerance : 3 sigma)

Steerer

Quadrupole

Bellow

Beam pipeBeam clearance inside MQ (Ø93 mm)


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

linac 4 project l4t/l4z design status j.humbert / b.riffaud on behalf of en-mme design team 1 st...

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