BDS GDE context LC-ABD2 : WP4 - Beam Line Design

12th April 2007, LC-ABD Plenary, RHUL

Deepa Angal-KalininASTeC, The Cockcroft Institute

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Changes in BDS configuration since last LC-ABD plenary (sep’06)

20mr IR

2mr IR

FF

E-collim.

-collim.

DiagnosticsBSYtune-up dump

Two collider halls separated longitudinally by 138m

Snowmass (August 2005) to Vancouver (July 2006) baseline

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Changes in BDS configuration since last LC-ABD plenary (sep’06)

14mr IR

14mr IR

One collider hall

Valencia (Nov 2006) baseline

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Changes in BDS configuration since last LC-ABD plenary (sep’06)

After Valencia (Nov’06) : Final RDR BDS configuration1 IR with 14 mrad crossing angle2 Complementary detectors in push-pull configuration

14mr IR

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14mr IR

FF

E-collimator

-collim.

Diagnostics

Tune-up dump

BSY

Sacrificial collimators

Extraction

BDS : RDR configuration

-80

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BDS layout (Single IR – Push-Pull)

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IR hall region

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S4 Task force for BDS R&D

• Chris Damerell, Hitoshi Hayano, Marc Ross– representing RDB

Deepa Angal-Kalinin, Andrei Seryi, Hitoshi Yamamoto– representing BDS

• S4 task force is organising a series of expanded meetings, with participation of leaders or representatives of “work packages” or of collaborations working on sub-systems

• Goal – to discuss plans for EDR and beyond, to help GDE and funding agencies, via S4 and Global R&D board, to focus resources in most suitable way

S4 Task Force

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S4 extended task force meetings

Several extended meetings since Beijing :

1. Discussion of overall plans for EDR and beyond

2. Interaction region, magnets & stability

3. Beam dump and collimation

4. Crab cavity

5. EDR planning, BDS technical risk

6. ATF2

7. Alternative extraction schemes

8. ………..will continue on other topics after the MAC (26-27 April)

26 Feb

5 March

12 March

19 March

26 March

11 April

? April

S4 Task Force

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Results of discussions within S4 task force

• …will be used to provide feedback to GDE R&D board

• and may be used directly for re-planning purposes of this and next year efforts in three regions– Discussions within S4 for funds in US for 2008-

09, which need to be re-planned, due to new budget targets and also due to recent changes of ILC design (single push-pull IR) which shifted the balance of challenges

S4 Task Force

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Schedule assumptions

• Assume optimistic schedule as shown on next page (~3year for EDR, two years for Approval phase and 7 years for construction)

• Hopefully, this optimistic schedule may be possible if– LHC would give exciting results – Yield of SRF cavities production will reach high stable level– Process of site selection and approval will be expedited– Commitment to invest in ILC will form in all three regions– Cost uncertainty will be reduced

• EDR planning – focus on cost uncertainty reduction:– design of systems (at “ ~30% level” )– build and test critical prototypes to ensure performance

S4 Task Force

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Overall schedule….under discussion within S4

S4 Task Force

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Risk analysis in BDS

• Primary goal, to evaluate BDS cost risk• Timeline is incorporated into analysis

– Assumption in RDR / Initial Risk– Mitigation / detection in EDR– Remaining probability of failure at the end of EDR

& cost impact– Mitigation / detection in construction &

commissioning– Probability of failure in construction &

commissioning & final cost impact

S4 Task Force

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WP description

• Include WP description; sub-description; Lab/University; name of WP leader; assignment status; category; FTE & M&S for 07-09 (all numbers so far are placeholders) and certainty of status.

S4 Task Force

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S4 : Evolving Work Package Definitions

WP Description WP subdescription Lab/Univ WP leaderATF2 construction, commissioning, operation ATF2 conventional facility construction KEK UrakawaATF2 construction, commissioning, operation Develop alignment for ATF2 beamlines KEK SugaharaATF2 construction, commissioning, operation Develop bends, FD, sextupoles for ATF2 SLAC SpencerATF2 construction, commissioning, operation Develop BPM & mover control tools SLAC MayATF2 construction, commissioning, operation Develop cavity BPMs & electronics PAL ParkATF2 construction, commissioning, operation Develop cavity BPMs & electronics SLAC NelsonATF2 construction, commissioning, operation Develop cavity BPMs & electronics Tohoku U InoueATF2 construction, commissioning, operation Develop Final Doubler integrated supports LAPP JeremieATF2 construction, commissioning, operation Develop High availability power supplies for ATF2 SLAC LamATF2 construction, commissioning, operation Develop IP nanogrid beam size monitor KEK HondaATF2 construction, commissioning, operation Develop IP Shintake beam size monitor Tokyo U SueharaATF2 construction, commissioning, operation Develop IP-BPM & S-band BPMs Kyungpook UnivEun-san KimATF2 construction, commissioning, operation Develop magnets for ATF2 IHEP, Ch Z.YinATF2 construction, commissioning, operation Develop S-band BPMs LC-ABD BoogertATF2 construction, commissioning, operation Develop tuning & commissioning tools CERN ZimmermannATF2 construction, commissioning, operation Develop tuning & commissioning tools SLAC WhiteATF2 construction, commissioning, operation Develop vacuum system for ATF2 KEK TerunumaATF2 construction, commissioning, operation Fast feedback development LC-ABD BurrowsATF2 construction, commissioning, operation Investigate ATF extraction emittance IFIC Faus-GolfeATF2 construction, commissioning, operation Investigate ATF extraction emittance LAL BambadeATF2 construction, commissioning, operation Investigate PM FD design for ATF2 Kyoto U IwashitaATF2 construction, commissioning, operation IR magnet survey development LC-ABD UrnerATF2 construction, commissioning, operation Laser wire developments LC-ABD BlairATF2 construction, commissioning, operation Support the nano metrology BPM stand LLNL GronbergATF2 construction, commissioning, operation Upgrade of ring BPM electronics FNAL WendtBDS design & engineering Background and beam-beam study LAL BambadeBDS design & engineering BDS accelerator physics design SLAC fill inBDS design & engineering Design feedback and tuning procedures CERN SchulteBDS design & engineering Design feedback and tuning procedures SLAC WhiteBDS design & engineering Design MPS system of field value failure detection NONE noneBDS design & engineering Integrated design of beamlines LC-ABD Angal-KalininBDS design & engineering Optimize IR orbit correction CEA NapolyBDS instrumentation design Alignment system deisgn NONE noneBDS instrumentation design Design deflecting y-t cavity NONE none

List continues …..S4 Task Force

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Numbers are place holders : will be filling in the LCABD2 numbers soon

Resources : certain for 07/08, uncertain for 08/09 ……

S4 Task Force

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LC-ABD2WP4 : Beam Line Design

• 4.1 Lattice Design & beamline integration

(STFC, Manchester, RHUL)

• 4.2 Collimator design

(STFC, Birmingham, Lancaster, Manchester)

LC-ABD1WP1.1 +WP1.2 + WP5.3

1.1 Lattice Design & Beam Simulations

1.2 BDS beam transport simulations and backgrounds

5.3 Collimation

LC-ABD1 LC-ABD2

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WP4.1 : Lattice design & beam line integration

Goals

• Optimisation of 14 mrad and develop engg details.• BDSIM development : detailed analysis of extraction

line and back scattering, synchrotron radiation …• Full optics simulations of skew correction and

diagnostics section (ATF2)• Alternative extraction schemes• Collimation optics• ATF2 : simulations and beam tests• Vacuum design (reduced scope)• Beam Line integration• Optics support at ESA or other test facility

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WP4.1 : Lattice design & beam line integration

Deliverables

• Full evaluation of 14 mrad IR and its integration into the detector

• Detailed procedure for skew correction and emittance measurement for the ATF2 and ILC

• Optimised beam apertures for the BDS • Integration of BDS with detector integration • Improved beam optics for better collimation

performance • Tuning knobs and tests for ATF2 • Report on feasibility studies for alternative extraction

schemes

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WP4.2 : Collimator design

Goals

• Develop data validated capability to model short range wakefields for collimators

• Develop materials and designs for fixed and adjustable apertures which will resist damage, quantify operational limits and prototype means of assessing damage in situ for collimators

• Develop overall conventional engineering design of collimators and masks, with prototyping of critical subsystem components as necessary.

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WP4.2 : Collimator design

Deliverables

• 3D wakefield simulations for collimator prototypes• Wakefield test beam results for collimator jaws • Data-validated material response simulations for

BDS components • Prototype damage detection system for collimators • Full engineering details of absorbers, protection

collimators and masks in the BDS • Prototypes of critical subsystems of adjustable jaw

collimators

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Beam Line Integration

WP4Beam Line Integration

WP6MONALISA

WP7Feedback

WP8Diagnostics

WP5Crab System

WP10Beam dumps

WP9Cavity BPMs

STFC engineering resources :Will need close interaction withAll these WPs