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Conceptual Design Review of the “LHC Interaction Regions Upgrade – Phase I”. Inner Triplet Phase I Corrector Design Options. Corrector Package. Q3. ~5..7 m. SM. M C S (T) X. D1. MCBXV. MCBXH. M Q S X. MQXC. B PM. A2. A1. B3/(B6?). B1. To IP .

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Inner triplet phase i corrector design options

Conceptual Design Review of the “LHC Interaction Regions Upgrade – Phase I”

Inner Triplet Phase I Corrector Design Options

Corrector Package

Q3

~5..7 m

SM

M

C

S

(T)

X

D1

MCBXV

MCBXH

M

Q

S

X

MQXC

B

PM

A2

A1

B3/(B6?)

B1

To IP 

M. Karppinen CERN AT/MCS 31/07/08


Acknowledgements
Acknowledgements: Upgrade – Phase I”

  • STFC/RAL: E. Baynham, S. Canfer, P. Loveridge, J. Rochford

  • CIEMAT: F. Toral, I. Rodriguez

  • CERN: B. Auchmann, F. Cerrutti, G.-J. Coelingh, N. Elias, S. Fartoukh, S. Russenchsuck, N. Schwerg, T. Sahner, E. Wildner,

M. Karppinen CERN AT/MCS


Outline
Outline Upgrade – Phase I”

  • Corrector requirements and constraints

  • Some LHC corrector specific fabrication aspects

  • Design status:

    • MCBX (CERN)

    • MQSX (STFC/RAL & CERN)

    • MCSX (CIEMAT & CERN)

  • Summary

M. Karppinen CERN AT/MCS


Requirements constraints
Requirements & Constraints Upgrade – Phase I”

  • Fit all correctors in dedicated cryo-assembly within 5..7 m between Q3 and D1

  • Aperture ≥ø120 mm (TBC)

  • Operating temperature 1.9 K

  • (Try to) Use existing:

    • Power converter

    • Bus-bars

    • Current leads

    • Quench detection & protection systems

M. Karppinen CERN AT/MCS


Requirements cont
Requirements.. (cont) Upgrade – Phase I”

  • MCBX

    • correct for a triplet misalignment of 1mm

    • 1-1.5 Tm for generation of X-angle, parallel separation, and transverse adjustment of the IP

    • 6 Tm in H- and V-plane (presently 3 x 1.51/1.56 Tm)

  • MQSX

    • Compensate for triplet roll of 4 mrad

    • 20 Tm/m or 40 T/m x 0.5 m

  • MCSX

    • correct for b3 of D1 (29 Tm)

    • ~25 T/m2x 0.5 m (b3 = 6 units)

  • MCTX

    • MQX systematic b6 (1 unit) correction

  • MCSOX

    • Not yet clear, if required…

Based on scaling the present triplets.

New requirements not yet available

M. Karppinen CERN AT/MCS


Requirements cont1
Requirements.. (cont) Upgrade – Phase I”

  • Very hostile environment

    • Material selection (insulation, head spacers etc..)

    • Spare policy

    • “Intervention friendly” design of cryo-magnets

    • Radioprotection

  • Reliability:

    • MCBX must work, no redundancy

  • Cost

    • Investment on powering/cooling

    • Fabrication cost & spares

M. Karppinen CERN AT/MCS


Lhc corrector fabrication aspects
LHC Corrector Fabrication Aspects Upgrade – Phase I”

  • Flat cable

    • Purpose built machine to bond 2-25 enamel (PVA) insulated wires together

    • Tolerance +0.02/-0.01 mm, unit lengths up to 160 m

    • Wires are connected in series on connection plate

  • Coil winding

    • Dipole coils with standard winding machine

    • Counter-winding technique used for single winding block coils

    • All coils epoxy impregnated in vacuum or by wet-laying

    • Coil lengths up to 1.5 m

  • Assembly

    • Epoxy-glass around the coils by vacuum impregnation or pre-preg

    • Pre-stress from shrink-fitted Alu/St.steel cylinders

    • Off-center laminations

M. Karppinen CERN AT/MCS


Superconducting wire

Nb47%Ti Upgrade – Phase I”

PVA insulation

RRR >100

Filament diameter 6-7 micrometer.

Limited quantity available for model magnets

Superconducting wire

M. Karppinen CERN AT/MCS


Coil winding
Coil winding Upgrade – Phase I”

Counter-winding (MQSX)

Dipole winding (MCBM)

M. Karppinen CERN AT/MCS


Coil assembly
Coil assembly Upgrade – Phase I”

M. Karppinen CERN AT/MCS


Present mcbx coil fabrication
Present MCBX: Coil Fabrication Upgrade – Phase I”

M. Karppinen CERN AT/MCS


Present mcbx assembly
Present MCBX: Assembly Upgrade – Phase I”

M. Karppinen CERN AT/MCS


Mcbx electrical connections
MCBX: Electrical Connections Upgrade – Phase I”

M. Karppinen CERN AT/MCS


Mcbx for phase i
MCBX for Phase I Upgrade – Phase I”

  • From 3 nested to 2 separate H/V-steering magnets

  • Central field: 3 T => ~3.5 T

  • Total length: 0.7 m => ~2 m/unit

  • Aperture: ø90 mm => ø120 mm

  • Stored energy: 44kJ => ≥150 kJ

  • Field quality < 1unit @30 mm

  • Quench protection: none => active protection

  • Mechanical structure based on collared coils

  • First design iteration for Inom ≤600 A

  • Alternative high current designs based on MQY and MB cables

M. Karppinen CERN AT/MCS


600 a design
600 A Design Upgrade – Phase I”

wp = ~60 % on the LL

8-way cable

PVA insulated wire

Potted coils

Each coil consists of 8 electrical circuits in series with a quench stopper in between

Quench stopper between the coils

Existing power converters

Std. LHC QP system

M. Karppinen CERN AT/MCS


Mcbx 600 a design
MCBX: 600 A Design Upgrade – Phase I”

M. Karppinen CERN AT/MCS


Mcbx quench analysis
MCBX: Quench analysis Upgrade – Phase I”

  • Four 600 A cases analyzed at this point

    • Wire #4, 1.9 K, no dump resistor

    • Wire #4, 1.9 K, with dump resistor

    • Wire #4, 4.5 K, with dump resistor

    • Wire #3, 1.9 K, with dump resistor

      Additional cases to look into

    • Cable versions, with heaters/dump resistor

    • Include energy deposition from FLUKA

M. Karppinen CERN AT/MCS


Lhc 600 a circuit
LHC 600 A circuit Upgrade – Phase I”

Courtesy of Gert-Jan Coelingh (AT-MEI)

Design for Rd=0.7 Ω with 2 x mass available

Ugnd ≤ 420 V

Present Rd tested with 113 kJ (+115°C)

Breaker designed for 750 A

3 spare systems available

M. Karppinen CERN AT/MCS


Wire 4 1 9 k with r dump
Wire#4, 1.9 K, with R Upgrade – Phase I”dump

Rd = 0.7 Ω (14.6 ms)

Tmax = 140 K

Ugnd = 400 V

UR= 1100 V

=>SAFE

Tmax

Quench origin

M. Karppinen CERN AT/MCS


Wire 4 1 9 k with r dump1
Wire#4, 1.9 K, with R Upgrade – Phase I”dump

M. Karppinen CERN AT/MCS


Wire 4 4 5 k with r dump
Wire#4, 4.5 K, with R Upgrade – Phase I”dump

Rd = 0.7 Ω (14.6 ms)

Tmax = 110 K

Ugnd = 350 V

UR = 870 V

=>SAFE

Wire#3, 1,9 K, with Rdump

Rd = 0.9 Ω (14.6 ms)

Tmax= 250 K

Ugnd = 1000 V

UR = 3100 V

=>RISKY

M. Karppinen CERN AT/MCS


Mcbx cable design
MCBX: Cable Design Upgrade – Phase I”

MB Outer Cable

MQY Outer Cable x 2

Aperture easily enlarged (shielding)

Much improved cooling (1.9K)

Single or double layer coil (powering)

Collars

New power converters, cables, and leads. (Challenging around 0-current?)

Active QPS (heaters/dump resistors)

Can meet field quality requirements (yoke optim.)

M. Karppinen CERN AT/MCS


Mcbx cable variants
MCBX: Cable variants Upgrade – Phase I”

MQY Outer Cable

MQY Inner Cable

MQY Inner Cable x 2

MQY Outer Cable x 2

M. Karppinen CERN AT/MCS


Mcbx cable design 1 9 k
MCBX: Cable Design,1.9 K Upgrade – Phase I”

M. Karppinen CERN AT/MCS


Mechanical design collars
Mechanical design: collars Upgrade – Phase I”

Courtesy of T. Sahner (TS-MME)

Courtesy of N. Elias

M. Karppinen CERN AT/MCS


Mcbx design status plans
MCBX Design status & plans Upgrade – Phase I”

  • Magnetic design

    • X-sections for 600 A and Cable

    • Software development/testing

  • Quench analysis

    • 600 A versions

    • Cable design

  • FLUKA Studies

  • Design optimization

    • Mechanical design

    • Material selection

    • 2D&3D magnetic design

  • Model magnet (after Aug -09)

  • Model Test (after Sep -09)

  • Prototype Design & Construction (2010..)

Next step

Underway

Underway

M. Karppinen CERN AT/MCS


Mcbx summary
MCBX Summary Upgrade – Phase I”

  • 600 A design based on wire #4 would allow re-using the existing powering and protection systems, but radiation & energy deposition may compromise the reliability

  • Cable design more robust, easier to make, makes full use of 1.9 K cooling, and offers more freedom for aperture size. Requires investment in powering and protection.

  • 1.9 K operation:

    • Extract the heat from energy deposition

    • More compact coils, shorter overall length

    • Savings in material and tooling cost

    • Reduced risk of fabrication failure (< 2 m, 600 A)

    • 1.9 K cooling is available

  • Decisions required (aperture, Inom, field quality) to start the detailed design and to meet the tight milestones for the project.

M. Karppinen CERN AT/MCS


Mqsx for phase i
MQSX for Phase I Upgrade – Phase I”

  • Gradient: 80 T/m => 40 T/m

  • Total length: 0.3 m => 0.8 m

  • Aperture: ø70 mm => ø120 mm

  • Stored energy: 4.2 kJ => ~10 kJ

  • Field quality < 1unit @30 mm

  • Quench protection: none => probably none (TBC)

  • Mechanical design based on the present concept

  • First design iteration for Inom <600 A based on wire #3

M. Karppinen CERN AT/MCS


Mqsx present design
MQSX: Present design Upgrade – Phase I”

M. Karppinen CERN AT/MCS


Mqsx parameters
MQSX: Parameters Upgrade – Phase I”

M. Karppinen CERN AT/MCS


Field quality first estimate
Field quality: First Estimate Upgrade – Phase I”

From S. Fartoukh

  • Scale measured mean MQXB to 30 mm

  • Scale with ß (12.5 km/4.5 km)n/2

  • MQSX strength 0.004 of MQXB

  • To stay in the shadow allow <10 %

M. Karppinen AT/MCS


Phase i mqsx
Phase I MQSX Upgrade – Phase I”

M. Karppinen CERN AT/MCS


MQSX: Next steps Upgrade – Phase I”

  • Moving forward with the baseline 6 wire 2 block configuration, there are a number of issues to be addressed.

  • Magnetically

    • Quench protection-should not be a problem, but needs to be confirmed

    • Effect of manufacturing tolerances on harmonic structure

    • 3d models: end effects, spacer optimisation

  • Mechanically

    • P. Loveridge has started looking at mechanical design issues and FEA

    • Radiation hard materials

  • Baseline definition

    • Key components

    • Preliminary drawings

    • Manufacturing costs

Courtesy of James Rochford - STFC

M. Karppinen CERN AT/MCS


Mcsx for phase i
MCSX for Phase I Upgrade – Phase I”

Courtesy of Fernando Toral (CIEMAT)

M. Karppinen CERN AT/MCS


Mcsx parameters draft 1
MCSX: Parameters (Draft 1) Upgrade – Phase I”

Courtesy of Fernando Toral (CIEMAT)

M. Karppinen CERN AT/MCS


Summary
Summary Upgrade – Phase I”

  • Verydemanding operating environment

  • MCBX shall have the same level of reliability as MQX (radiation hardness, cooling)

  • Cable design with active protection operating at 1.9 K is the most promising option

  • MQSX based on the present technology can meet the Phase I requirements

  • Super-ferric MCSX expected straight forward

  • Detailed design requires decision on aperture, operating current, and field quality targets

M. Karppinen CERN AT/MCS


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