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

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 Albrecht Wagner, AAAS 0205 1

HERA in Hamburg The world’s most powerful microscope: an electron-proton collider Accelerators were built with Experiments were built by large help (manpower) and international collaborations contributions (hardware) of Italy, France, Poland, China Albrecht Wagner, AAAS 0205 2

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 Albrecht Wagner, AAAS 0205 3

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 10 34 cm -2 s -1 . The consensus document has been signed by > 2700 scientists from all around the world. Substantial overlap in running with LHC recommended Albrecht Wagner, AAAS 0205 4

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 Albrecht Wagner, AAAS 0205 5

A Road Map for the Energy Frontier Tevatron HERA LHC ILC ? CLIC, Muon collider, other technologies ? 2020 2010 2015 2005 Albrecht Wagner, AAAS 0205 6

Meeting the Accelerator Challenges IP Beam Size vs Time 10 10 Efforts in the US, Asia and Europe and 9 9 collaborations between the regions -> to meet the outstanding accelerator 8 8 σ X ∗ σ y challenges: 7 7 B ea m S ize (m icro n s) σ x ∗ σ y (m icro n s 2 ) 6 6 1) Proof of principle: 5 5 SLC Design 4 4 ( σ x ∗ σ y) SLAC Linear Collider at Stanford σ X 3 3 σ Y New Territory in Accelerator Design and 2 2 Operation 1 1 Achieving small beam sizes 0 0 1985 1990 1991 1992 1993 1994 1996 1998 Year Albrecht Wagner, AAAS 0205 7

More Accelerator Challenges Emittance = measure for beam size 2) Making tiny beams ATF Damping Ring at KEK “Laser Wire” Albrecht Wagner, AAAS 0205 8

Developing Development of Gradients in superconducting RF cavities 3) Developing better accelerators 45 SC RF structures for accelerators TESLA were developed in many countries el.polish 40 The TESLA collaboration, centred 35 at DESY combined ~ all the world 30 expertise in SC, thus leading to Gradient (MV/m) major progress: 25 TESLA >25-fold improvement in 20 TESLA performance/cost in 10 years 15 CEBAF 10 World Average Major impact on next generation 5 light sources (X-ray lasers) , proton accelerators etc. 0 1980 1985 1990 1995 2000 2005 Year Albrecht Wagner, AAAS 0205 9

Building a Prototype Built at DESY in Hamburg with substantial international contributions RF gun accelerator modules collimator undulators bunch bunch FEL bypass Laser compressor compressor experimental area 4 MeV 150 MeV 450 MeV 1000 MeV Albrecht Wagner, AAAS 0205 10

Start of a Global Design Effort After a decision on the technology: a lot of enthusiasm, willingness to self- organise, 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 Albrecht Wagner, AAAS 0205 11

Detector Development physics case studied with realistic assumptions for a LC detector detector design is challenging! high statistical power of LC has to be met by high detector resolution World-wide studies are taking place, three detector concepts are emerging Albrecht Wagner, AAAS 0205 12

Project Timelines 2005 2006 2007 2008 2010 2012 2015 GDE process CDR TDR ? construction commissioning ILC physics preparation construction EURO XFEL operation Albrecht Wagner, AAAS 0205 13

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 … Albrecht Wagner, AAAS 0205 14

Steady Progress 2001 • Road map discussions in the three regions, leading to a consensus about scientific priorities • Decision by the German Government to move forward on 2003 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 2004 • Decision on technology • First ILC workshop 2005 • ICFA unanimously agrees on candidate for GDE director and starts negotiations This list is incomplete, but illustrates the steady progress Albrecht Wagner, AAAS 0205 15

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? Albrecht Wagner, AAAS 0205 16

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. Albrecht Wagner, AAAS 0205 17