Accelerator Based Particle Physics going Global What has been done - - PowerPoint PPT Presentation

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Albrecht Wagner, AAAS 0205

Accelerator Based Particle Physics going Global

• What has been done

in the past?

• What should be done

in the future?

• Which challenges

need to be met? Albrecht Wagner DESY and Hamburg University

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Albrecht Wagner, AAAS 0205

HERA in Hamburg

The world’s most powerful microscope: an electron-proton collider Accelerators were built with help (manpower) and contributions (hardware) of Italy, France, Poland, China Experiments were built by large international collaborations

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Albrecht Wagner, AAAS 0205

The Large Hadron Collider in Geneva

proton-proton collider, under construction in the LEP tunnel (27 km circumference) first collisions in 2007 Accelerator and experiments built with substantial international contributions, well beyond CERN member states CERN as host is an international organisation

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Albrecht Wagner, AAAS 0205

The Next Step: An Electron-Positron Linear Collider

The scientific case: A world-wide consensus has formed for a LC project in which positrons collide with electrons at energies up to 500 GeV, with luminosity above 1034 cm-2s-1. The consensus document has been signed by > 2700 scientists from all around the world. Substantial overlap in running with LHC recommended

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Albrecht Wagner, AAAS 0205

The International Linear Collider as Global Project

• Many reasons speak for a truly global project:

– Necessary funding – Scientific challenges – Political climate concerning basic research – Big time gaps between new projects

• Many steps have been taken in this direction:

– Scientific consensus – Technology choice – World-wide organisation of accelerator work – World-wide organisation of detector work – OECD – Funding agencies

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Albrecht Wagner, AAAS 0205

A Road Map for the Energy Frontier

Tevatron HERA LHC ILC ? CLIC, Muon collider, other technologies ?

2020 2015 2010 2005

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Albrecht Wagner, AAAS 0205

Meeting the Accelerator Challenges

IP Beam Size vs Time

1 2 3 4 5 6 7 8 9 10 1985 1990 1991 1992 1993 1994 1996 1998

Year

B ea m S ize (m icro n s)

1 2 3 4 5 6 7 8 9 10

σ x ∗ σ y (m icro n s 2 )

SLC Design (σx ∗ σy) σX σY σX ∗ σy

Efforts in the US, Asia and Europe and collaborations between the regions -> to meet the outstanding accelerator challenges: 1) Proof of principle: SLAC Linear Collider at Stanford New Territory in Accelerator Design and Operation Achieving small beam sizes

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Albrecht Wagner, AAAS 0205

More Accelerator Challenges

Emittance = measure for beam size

2) Making tiny beams

ATF Damping Ring at KEK “Laser Wire”

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Albrecht Wagner, AAAS 0205

Developing

Development of Gradients in superconducting RF cavities 5 10 15 20 25 30 35 40 45 1980 1985 1990 1995 2000 2005 Year Gradient (MV/m) World Average CEBAF TESLA TESLA TESLA el.polish

3) Developing better accelerators SC RF structures for accelerators were developed in many countries The TESLA collaboration, centred at DESY combined ~ all the world expertise in SC, thus leading to major progress: >25-fold improvement in performance/cost in 10 years Major impact on next generation light sources (X-ray lasers) , proton accelerators etc.

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Albrecht Wagner, AAAS 0205

Building a Prototype

Built at DESY in Hamburg with substantial international contributions

RF gun FEL experimental area bypass 4 MeV 150 MeV 450 MeV 1000 MeV undulators collimator bunch compressor Laser bunch compressor accelerator modules

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Albrecht Wagner, AAAS 0205

Start of a Global Design Effort

After a decision on the technology: a lot

• f enthusiasm, willingness to self-
• rganise, and a strong sense of initiative

A first workshop in Japan has advanced the global collaboration on well defined work packages Convergence towards a common project

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Albrecht Wagner, AAAS 0205

Detector Development

physics case studied with realistic assumptions for a LC detector detector design is challenging! high statistical power

• f LC has to be met by

high detector resolution World-wide studies are taking place, three detector concepts are emerging

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Albrecht Wagner, AAAS 0205

Project Timelines

2006 2007 2008 2015 CDR TDR GDE process

construction commissioning physics preparation

2010 2012

construction

• peration

2005

ILC EURO XFEL

?

A Global Accelerator Network

• Collaboration of interested accelerator laboratories and institutes

world-wide with the goal to build, operate and utilise large new accelerators

• Follows major detector collaboration in particle physics
• Partners contribute through components or subsystems
• Joint operation

Examples from science (astronomy…) and industry …

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Albrecht Wagner, AAAS 0205

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Albrecht Wagner, AAAS 0205

Steady Progress

• Road map discussions in the three regions, leading to a

consensus about scientific priorities

• Decision by the German Government to move forward on

an X-ray (same technology) and to continue the R&D for the ILC in an international context

• First meetings of the funding agencies
• Consultative group of OECD
• OECD Ministerial Statement supporting the ILC
• Decision on technology
• First ILC workshop
• ICFA unanimously agrees on candidate for GDE director

and starts negotiations This list is incomplete, but illustrates the steady progress 2001 2003 2004 2005

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Albrecht Wagner, AAAS 0205

Issues to be addressed

• Which is the best structure for an international projects?
• How and why should the labs which participate in the

construction be involved in the operation?

• How to guarantee a long term project stability?
• Does it require a international organisation with treaties?
• Understand the balance between host and non-host regions
• When and how should the site choice be made?
• What can we learn from ITER?

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Albrecht Wagner, AAAS 0205

Summary

• The scientific case for a Linear Collider is strong, a world

consensus exists on its importance

• The technology for the LC is well developed
• Politicians are following the process (technical decision, joint

global design, self-organisation,..)

• The LC will be realised a a truly global project
• The community – in close dialogue with funding agencies and

politics - is ready to meet the challenges associated with this global approach.

• Science has always helped to cross borders, we want to

continue along these lines.