J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 1 The CLIC Study and the DAPNIA participation The world-wide scene about Linear Colliders CERN Council Policy CLIC complementary to ILC Feasibility of the CLIC scheme CTF3, the facility to address the key issues Short & Medium Term DAPNIA responsibility Long Term DAPNIA perspectives Conclusion

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 2 World consensus about a Linear Collider as the next HEP facility after LHC 2001: ICFA recommendation of a world-wide collaboration to construct a high luminosity e+/e- Linear Collider with an energy range up to at least 400 GeV/c 2003: ILC-Technical Review Committee to assess the technical status of the various designs of Linear Colliders 2004: International Technology Recommendation Panel down-selecting the Super-conducting technology for an International Linear Collider (ILC) Linear Collider in the TeV energy range 2004: CERN council support for R&D addressing the feasibility of the CLIC technology to possibly extend Linear Colliders into the Multi-TeV energy range.

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 3 SPC & Council SPC: March 2004: Summary of CLIC Physics case and proposed accelerated R&D programme (CERN/SPC/841-CERN/2552) with recommendation of a world-wide multi-lateral collaboration of volunteer institutes for tests of feasibility of the CLIC concept for Multi-TeV Linear Collider to arrive before 2010 at a firm conclusion on its possible use SPC Chairman’s conclusion: The SPC supported the many good arguments on the rich physics potential of CLIC. The range of possibilities would be clarified by the results of LHC The SPC re-expressed its support for the acceleration of the tests of the feasibility of the CLIC concept on the proposed time scale Council’s summary of conclusions: CERN/2554 In line with the conclusion of the SPC, the Council expressed strong support for accelerating the R&D on CLIC as proposed by the management in document CERN/SPC/841-CERN/2552 SPC: June 05 & Sept 05: Progress follow-up and CTF3 visit

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 4 The ILC Plan and Schedule Global Design EffortProject Baseline configuration Reference Design ILC R&D Program Technical Design Expression of Interest to Host International Mgmt LHC Physics CLIC CERN/SPC and ICFA workshop )

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 5 Tentative long-term CLIC scenario Shortest and technically limited schedule Technology evaluation and Physics assessment based on LHC results for a possible decision on Linear Collider funding with staged construction starting with the lowest energy required by Physics

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 6 CERN participation to ILC ILC- MoU: Support to GDE ILC project management tools Site Specific Cost Study Major partner in specific studies: Civil engineering, Cryogenics& Cryostats, Beam dynamics R&D on generic key issues independent of technology: Participation in EUROTeV design study & CARE project R&D on Beam diagn., Beam Delivery System (BDS), Beam dyn… Tests with beam in CTF3 Test facility: Participation to R&D on generation of Low ATF1/KEK and of small spot

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 7 J.P.Delahaye for The Compact LInear Collider Study Team The CLIC study is a site independent feasibility study aiming at the development of a realistic technology at an affordable cost for an e± Linear Collider in the post-LHC era for Physics in the multi-TeV center of mass colliding beam energy range. CLIC = Complementary to ILC = C ILC THE COMPACT LINEAR COLLIDER (CLIC) STUDY clic-study.web.cern.ch/CLIC-Study / CERN , CERN , CERN

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 8 World-wide CLIC collaboration l Ankhara University (Turkey): CTF3 beam studies & operation l BERLIN Technical University (Germany): Structure simulations GdfidL l BINP (Russia): CTF3 magnets development & construction l CIEMAT (Spain): CTF3 kickers, septa, correctors & power supplies l CERN (Switzerland): Study coord., Structures devel., CTF3 const.&com. l DAPNIA (France): CTF3 probe beam generation, acceleration & meas. l Finnish Industry (Finland): Sponsorship of a mechanical engineer l INFN / LNF (Italy): CTF3 delay loop, transfer lines & RF deflectors l JINR & IAP (Russia): Surface heating tests of 30 GHz structures l KEK (Japan): Low emittance beams in ATF l LAL (France): Electron guns and pre-buncher cavities for CTF3 l LAPP/ESIA (France): Stabilization studies l LLBL/LBL (USA): Laser-wire studies l North Western University (Illinois): Beam loss studies & CTF3 equipment l RAL (England): Lasers for CTF3 and CLIC photo-injectors l SLAC (USA): High Gradient Structure design&tests, CTF3 drive beam inj. l UPPSALA University (Sweden): Beam monitoring systems for CTF3 Ankara University (Turkey):CTF3 beam studies & operation Berlin Tech. University (Germany): Structure simulations GdfidL BINP (Russia):CTF3 magnets development & construction, DR wiggler & beam dynamics CERN:Study coordination, structures devel., CTF3 construction/commissioning CIEMAT (Spain):CTF3 septa and kickers, correctors, power extraction structures DAPNIA/Saclay (France):CTF3 probe beam injector EUFinancing of RF photo injector (FP6 JRA) Finnish Industry (Finland): Sponsorship of mechanical engineer INFN / LNF (Italy): CTF3 delay loop, transfer lines & RF deflectors, ring vacuum chambers JINR & IAP (Russia):Surface heating tests of 30 GHz structures KEK (Japan):Low emittance beams in ATF LAL/Orsay (France): Electron guns and pre-buncher cavities for CTF3 LAPP/ESIA (France): Stabilization studies, CTF3 beam position monitors LLBL/LBL (USA): Laser-wire studies North-West. Univ. Illinois (USA): Various CTF3 Beam diagnostics & CTF3 equipment RAL (England): Lasers for CTF3 and CLIC photo-injectors SLAC (USA): High Gradient Structure testing, structure design, CTF3 injector design Uppsala University (Sweden): Beam monitoring systems for CTF3

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 9 High acceleration gradient (150 MV/m) “Compact” collider-overall length  33 km Normal conducting accelerating structures High acceleration frequency (30 GHz) Two-Beam Acceleration Scheme RF power generation at high frequency Cost-effective & efficient (~ 10% overall) Simple tunnel, no active elements “modular” design, can be built in stages Easily expendable in energy Overall layout for a center of mass energy of 3 TeV/c CLIC technology for Multi-TeV Linear Colliders 33.2 km 5.2 km

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 10 e + injector, 2.4 GeV e - injector 2.4 GeV CLIC 3 TeV layout e + main linac e - main linac, 30 GHz, 150 MV/m, 14 km BC2 BC1 e + DR 360m e - DR 360m booster linac, 9 GeV, 3.75 GHz train combination  B 16 cm→ 8cm decelerator, 21 sectors of 669 m IP1 & IP2 drive beam accelerator 2.37 GeV, 937 MHz CR1 84 m CR2 334 m combiner rings delay 21 m 352 klystrons 40 MW, 94  s BDS 2.6 km BDS 2.6 km 33.6 km

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 11 Performances of Lepton Colliders

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 12 CLIC construction in phases: Energy upgrade 3 TeV Stage Linac 1Linac 2 InjectorComplex I.P. 2.6 km 14.0 km 2.6 km 33.2 km Linac 1Linac 2 InjectorComplex I.P. 1.5 km 5.0 km 13.0 km 1 TeV Stage 0.42 TeV Stage Linac 1Linac 2 InjectorComplex I.P. 1.9 km 1.5km1.5 km 1.9 km 6.8 km

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 13 Strategy to address key issues Key issues common to all Linear Collider studies independently of the chosen technology in close collaboration with: International Linear Collider (ILC) study The Accelerator Test Facility European Laboratories in the frame of the Coordinated Accelerator Research in Europe (CARE) and of a “Design Study” (EUROTeV) funded by EU Framework Programme (FP6) Key issues specific to CLIC technology: Focus of the CLIC study All R1 (feasibility) and R2 (design finalisation) key issues addressed in test facilities: except the Multi-Beam Klystron (MBK) which does not require R&D but development by industry (feasibility study already done)

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 14 CLIC technology-related key issues (ILC-TRC 2003 R1: Feasibility R1.1: Test of damped accelerating structure at design gradient and pulse length R1.2: Validation of drive beam generation scheme with fully loaded linac operation R1.3: Design and test of damped ON/OFF power extraction structure R2: Design finalisation R2.1: Developments of structures with hard-breaking materials (W, Mo…) R2.2: Validation of stability and losses of drive beam decelerator; Design of machine protection system R2.3: Test of relevant linac sub-unit with beam R2.4: Validation of drive beam 40 MW, 937 MHz Multi-Beam Klystron with long RF pulse R2.5: Effects of coherent synchrotron radiation in bunch compressors R2.6: Design of an extraction line for 3 TeV c.m. Covered by CTF3 Covered by EUROTeV Industrial development

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 15 Study of generic key issues common to ILC and CLIC = CLIC participation 27 MEuros (9 MEuros by EU)

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 16 INFN CLEX CLIC Test Facility (CTF3) Combiner Ring: GHz stand and laser room TL2: : Drive beam generation scheme (R1.2) : Damped accelerating structure with nominal parameters (R1.1) ON/OFF Power Extraction Structure (R1.3) Drive beam stability bench marking (R2.2) CLIC sub-unit (R2.3) From 2005: Accelerating structures (bi-metallic) Development& Tests (R2.1) Key issues

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 17 D F D F D F D F D F D F D F D F LIL-ACS FDD F DFD DFD D F DUMP 8 m 2m D F D F D FDF D D F D DUMP D F D 40 m D F D 1m wide passage all around TBL 30 GHz Teststand Probe beam injector DUMP Layout for CLEX floor space DUMP D F D FF D D F D Instrumentation Testbeam 3m 6 m 13 m 15 m D F D D F D - Test beam line (TBL) to study RF power production (5 TW at 30 GHz) and drive beam decelerator dynamics, stability & losses - Two Beam Test Stand to study probe beam acceleration with high fields at high frequency and the feasibility of Two Beam modules CLIC experimental area (CLEX)

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 18 Work packages Relevant linac subunit Two-beam test stand Test Beam Line WP 3 CLEX Building WP 5 WP 2.2 WP 6 WP GHz High Gradient Test Stand Probe Beam WP 4 Combiner Ring and Transfer Lines WP 1 WP 7 WP 9 Structures 30 GHz power source CTF3 Operation WP 8

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 19 CTF3 Collaboration World-wide Institutes have been invited to contribute to this programme by: taking full responsibility for part, complete of one or several work-packages providing voluntary contributions “a la carte” in cash, in kind and/or in man-power Multilateral collaboration network of volunteer institutes (from which CERN is one of them) participating jointly to the technical coordination and management of the project. CTF3 collaboration meeting held at CERN on 30/11/05 MoU being signed by 14 Institutes from 9 Countries

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 20 CTF3 collaboration (30/11/05)

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 21 CTF3 Injector&Linac installation (2004) 7A Thermionic Gun (LAL-SLAC) Bunch length adjustment with magnetic chicane Bunchers(LAL)&Solenoids(SLACstudy) Novel RF power compression with Barrel Open Cavity (BOC) Accelerating structure with full beam loading

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 22 Full responsibility of INFN Frascati 1. Dec Dec.2004 Installation and commissioning with beam of the Delay Loop (2005) Injection area with 1.5 GHz RF deflector and septa

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 23 RF power in CTF2 Expected from input current Expected from output current 30 GHz power production in CTF3 for tests in CTF2 vacuum tanks containing Power Extraction Transfer Structure power out – rectangular WR34 to circular (overmoded) H01 17m waveguide with 5 bends but low-loss (85% transmission) (Russian collaboration) high power load result !!

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 24 incident RF pulse energy [mJ] Accelerating structure under test: Circular 2π/3, 3.5 mm, 55 MW for 150MV/m: Mo iris Pulse length [ns] Accelerating filed in 1. cell Well on the way to CLIC parameters 150MV/m during 70 ns 30 GHz conditioning of CLIC Accelerating Structure RF conditioning still progressing

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 25 CTF3 project & schedule

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J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 38 CLIC main beam injector complex Polarized or unpolarized electrons / unpolarized positrons

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 39 Conclusion E+/E- Linear Collider next facility at High Energy Frontier after LHC ILC and CLIC complementary technologies DAPNIA participation to both ILC and CLIC essential for DAPNIA and warmly appreciated by LC community DAPNIA responsibility of CTF3 Probe Beam in the frame of a world-wide multi-lateral collaboration: Full responsibility from design, construction, installation and commissioning Challenging project of high intensity & high quality beam generation and measurement Excellent opportunity to preserve and develop DAPNIA expertise on performing beam generation, acceleration, RF gymnastics, and measurements Medium and Long Term perspectives on the overall design and responsibility of the whole injector complexes of the main and drive beams of possible future High Energy Linear Colliders

J.P.Delahaye Journees Thematiques DAPNIA “Accelerateurs” ( ) 40 CTF3 collaboration (30/11/05)