CLIC near CERN Tunnel implementations (laser straight) Central MDI - - PowerPoint PPT Presentation

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Tunnel implementations (laser straight) Central MDI & Interaction Region

CLIC near CERN

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Physics at LC from 250 GeV to 3000 GeV

• Physics case for the Linear Collider:
• Higgs physics (SM and non-SM)
• Top
• SUSY
• Higgs strong interactions
• New Z’ sector
• Contact interactions
• Extra dimensions
• …. AOP (any other physics) …

Specific challenges for CLIC studies:

• Need to address Higgs-studies, including gains

for measurements at higher energies

• Reach for various “new physics” (list above)
• ptions; comparative studies with HiLumi LHC

and proton-proton at higher energies (FCC).

References: CLIC CDR and http://arxiv.org/pdf/he p-ex/0112004.pdf, see also talk S.Dawson

140 ms train length - 24  24 sub-pulses 4.2 A - 2.4 GeV – 60 cm between bunches 240 ns 24 pulses – 101 A – 2.5 cm between bunches 240 ns 5.8 ms

Drive beam time structure - initial Drive beam time structure - final

Possible CLIC stages studied

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Key features:

• High gradient (energy/length)
• Small beams (luminosity)
• Repetition rates and bunch

spacing (experimental conditions)

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Drive beam scheme:

• Generation tested, used to accelerate

test beam above specifications, deceleration as expected

• Improvements on operation, reliability,

losses, more deceleration studies underway Main Linac gradient:

• Ongoing test close to or on target (BDR

10-7, 100 MV/m)

• Uncertainty from beam loading being

tested Luminosity performance:

• Damping ring like an ambitious light source,

no show stopper

• Alignment system principle demonstrated
• Stabilisation system developed, benchmarked,

better system in pipeline

• Simulations on or close to the target, plus

verification studies in FACET and ATF on-going Implementation:

• Consistent three stage implementation

scenario defined

• Schedules, cost and power developed and

presented

• Site and CE studies documented

CLIC timing structure demanding:

• Detailed GEANT 4 simulations
• Studied using full reconstruction with background
• Make full use of timing and fine granularity to reconstruct the

physics objects with very high precision

• Shown to be fully compatible with high precision e+e- physics

Key results of CDR studies

2013-18 Development Phase

Develop a Project Plan for a staged implementation in agreement with LHC findings; further technical developments with industry, performance studies for accelerator parts and systems, as well as for detectors.

2018-19 Decisions

On the basis of LHC data and Project Plans (for CLIC and other potential projects), take decisions about next project(s) at the Energy Frontier.

4-5 year Preparation Phase

Finalise implementation parameters, Drive Beam Facility and other system verifications, site authorisation and preparation for industrial procurement. Prepare detailed Technical Proposals for the detector-systems.

2024-25 Construction Start

Ready for full construction and main tunnel excavation.

Construction Phase

Stage 1 construction of CLIC, in parallel with detector construction. Preparation for implementation

• f further stages.

Commissioning

Becoming ready for data- taking as the LHC programme reaches completion.

DRIVE BEAM

• LINAC

CLEX

CLIC Experimental Area

DELAY

• LOOP

COMBINER RING

CTF3 – Layout

10 m

4 A – 1.2 ms 150 MeV 28 A – 140 ns 150 MeV

Two-Beam Test Stand (TBTS) Test Beam Line (TBL)

Critical issues for next phase: Design and Implementation studies:

• CDR status: not optimized except at 3 TeV and not adjusted for Higgs discovery, not
• ptimized cost, first power/energy estimates without time for reductions, limited

industrial costing, very limited reliability studies X-band developments:

• CDR status: Single elements demonstrated – limited by test-capacity

System-tests:

• CDR status: CTF3 results initial phase (as of early 2012), ATF and FACET very little, no

convincing strategy for further system verification, programmes for use of Xband techology for other applications in its infancy

• CDR status concerning drive-beam FE: Nothing done beyond CTF3

Technology developments:

• CDR status: alignment/stability partly covered, BBA assumed, wakefield mon. perf.

assumed, no complete module

29 Countries – over 70 Institutes Accelerator collaboration Detector collaboration Accelerator + Detector collaboration

CLIC Collaboration