Скачать презентацию Preparation for a future lepton collider Erika Garutti Скачать презентацию Preparation for a future lepton collider Erika Garutti

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Preparation for a future lepton collider Erika Garutti Po. F evaluation Feb 26 – Preparation for a future lepton collider Erika Garutti Po. F evaluation Feb 26 – 29, 2009 at DESY

The future is a lepton collider To complement the LHC discovery with high precision The future is a lepton collider To complement the LHC discovery with high precision measurements the next step of HEP is to build an electron-positron collider LHC + ILC preparation for a future lepton collider - Erika Garutti International advisory committees (US APP 2010, CERN Council, ACFA, ECFA, ICFA) have repeatedly supported a future linear collider 2

Historical prospective 1992 -2002 TESLA Collaboration (TC, coordinated by DESY) aggressive R&D effort (TTF) Historical prospective 1992 -2002 TESLA Collaboration (TC, coordinated by DESY) aggressive R&D effort (TTF) TESLA TDR 2001 2002 BMBF decision to pursue construction of a European XFEL based on TESLA Technology – DESY shifts gears 2006 2004 ITRP recommends “cold-technology” as basis for ILC (strong DESY participation in the process) 2004 -2007 Global Design Effort (GDE) formed DESY primary contribution to ILC via synergy with XFEL R&D 2007 GDE published ILC Reference Design Report 2007 ILC planning for ILC Technical Design Phase capitalize long term experience in accelerator physics academic aspect: introduce accelerator physics in the university preparation for a future lepton collider - Erika Garutti 3

ILC time scale The International Linear Collider is the most mature project for a ILC time scale The International Linear Collider is the most mature project for a lepton collider EUROTe. V & CARE (FP 6) ILC-Hi. Grade (FP 7) Detector Lo. I Exploratory effort for alternative machines (plasma wakefield acceleration, muon collider) will be considered in the second half of the funding period preparation for a future lepton collider - Erika Garutti 4

Superconducting RF • 1990: • 2003: • 2006: 5 MV/m SCRF 25 MV/m achieved Superconducting RF • 1990: • 2003: • 2006: 5 MV/m SCRF 25 MV/m achieved at TTF 35 MV/m achieved >35 MV/m achieved in single cells ILC goal: 31. 5 MV/m operational accelerator gradient DESY develops the industrial procedure to produce high gradient SRF cavities with high efficiency • XFEL will order ~800 cavities specified at ~23. 5 MV/m (28 MV/m expected) Dedicated batch of 30 cavities available for high gradient studies ILC-Hi. Grade project preparation for a future lepton collider - Erika Garutti 5

High Gradient Developments 0. 5 mm ILC focussed activities Correlate surface defects with achieved High Gradient Developments 0. 5 mm ILC focussed activities Correlate surface defects with achieved gradient Optical inspection of the inner surface of cavities (DESY in coll. with KEK and Kyoto Uni. ) Defect in equator welding seam vertical insert Vertical insert • resonance determination • shock test, transport study Low level RF control • automatic qualification of cavity • resonances identification • tuning Sim. CON card DESY & Uni Göttingen (Alliance project) Fast feedback on RF quality preparation for a future lepton collider - Erika Garutti 6

A strong synergy between accelerators Operation of TTF/ FLASH with ILC-like beam parameters: 9 A strong synergy between accelerators Operation of TTF/ FLASH with ILC-like beam parameters: 9 m. A experiment Unique opportunity at DESY because of TTF/ FLASH ILC-like RF unit arrangement XFEL Bunch charge # bunches 1 3. 2 1 3 3250* n. C ILC FLASH experiment 2625 7200* 2400 Pulse length ms 650 970 800 Current m. A 5 9 9 9 Growing International Collaboration (ILC-driven) SLAC, FNAL, KEK, SACLAY, ANL, DESY… preparation for a future lepton collider - Erika Garutti 7

Siting the ILC DESY: unique experience from TESLA siting studies/ XFEL construction deep vs Siting the ILC DESY: unique experience from TESLA siting studies/ XFEL construction deep vs shallow current sample sites: • US (near FNAL) • EU (CERN) • Japan (several locations) all deep (>100 m) and similar geology RDR: need of real alternative sites single vs twin tunnel ILC RDR design: based on deep underground twin tunnel Dubna option for a shallow location TESLA/ XFEL input preparation for a future lepton collider - Erika Garutti XFEL will give the existence proof for a 1 km single tunnel e- linac near surface 8

Beam Instrumentation • Positron source development • baseline design: helical undulator • technological optimization Beam Instrumentation • Positron source development • baseline design: helical undulator • technological optimization / prototyping in collaboration with UK institutes • generation / measurement / transport of polarized positron n • Polarimetry n ig t o des c pa ine im ch ma • at low and high energy • R&D at DESY: SLD polarimeter + Si. PM total length 77. 6 m SLD pol. + Si. PM • Beam dynamics • main linac dynamics • beam delivery and machine detector interface • advance simulation tools available MERLIN is a general purpose C++ class libray for charged particle accelerator simulations preparation for a future lepton collider - Erika Garutti 9

ILC physics demands precision detectors DEjet=60%/√E ALEPH - rare processes/limited statistics - many final ILC physics demands precision detectors DEjet=60%/√E ALEPH - rare processes/limited statistics - many final states involving heavy bosons (Z, W, H): Mj 3 j 4 Precision Physics/ New Physics e+e- WW nn , e+e- ZZ nn Mj 1 j 2 - hadronic decay of W and Z - branching ratio ~70% - result in two hadronic jets ILC Mj 3 j 4 requires excellent jet energy resolution DEjet=30%/√E New concept: Particle Flow Mj 1 j 2 • Large international R&D effort to prove Particle Flow • DESY detector R&D program covers the key issues relevant to Particle Flow preparation for a future lepton collider - Erika Garutti 10

The detector program develop novel detector concepts at the technology frontier geared toward precision, The detector program develop novel detector concepts at the technology frontier geared toward precision, efficiency and speed main application to ILC but strong emphasis to compatibility with other accelerators and to spin-off applications Effort is well embedded into international community: - several key R&D collaborations - EUDET - Helmholtz Alliance complementing universities DESY offers: • significant infrastructure • long and stable support • experience in integration of different components • experience in organization of collaborative effort preparation for a future lepton collider - Erika Garutti 11

ILD: a detector for ILC ILD: successful merging of two detector concepts LDC (TESLA) ILD: a detector for ILC ILD: successful merging of two detector concepts LDC (TESLA) and GLD (Asian concept) Fully international project, strong links to Asia and Europe Detector based on the Particle Flow Concept Strong DESY role in • Design of ILD (simulation, physics) • Engineering studies (detector integration) Strong DESY role within ILD in • Detector integration (coll with LLR/ Paris) • Machine detector interface preparation for a future lepton collider - Erika Garutti 12

DESY engagement in detector R&D • R&D for Silicon-Photomultipliers spin-off to medical applications (PET) DESY engagement in detector R&D • R&D for Silicon-Photomultipliers spin-off to medical applications (PET) • R&D for high precision vertex detector technologies applications in other projects (MAPS @ STAR, DEPFET @ Super. Belle) • development of a finely segmented hadronic calorimeter and forward calorimeter advance fundamental knowledge of hadron shower spin-off to beam instrumentation key issues to validate Particle Flow • development of a highly efficient time projection chamber application to T 2 K, RD 51 at CERN • strong role in the development of software and reconstruction tools for the ILC

Software infrastructure Vital to ILC community world wide: common software frame, i/o format most Software infrastructure Vital to ILC community world wide: common software frame, i/o format most of ILD core software tools developed at DESY: - LCIO - data model - (w/ SLAC) used by ILC community - Marlin - modular framework for reconstruction (PFlow) and analysis tools - conditions data tool, detector geometry, … DESY will continue to further maintain and improve ILC core software in international collaboration framework used for massive Monte LCIO data model capabilities improve Carlo production for Lo. I (45 M evts) detector geometry description improve ILD detector optimization, physics studies, Possibility to compare detector effect major ILC R&D testbeams on physics for various configurations (EUDET, CALICE, . . . ) Particle Flow algorithms being studied at DESY 14

Validation of PFLOW R&D CALICE collaboration: 3 test beam campaigns at CERN and FNAL Validation of PFLOW R&D CALICE collaboration: 3 test beam campaigns at CERN and FNAL with 3 calorimeter prototypes with high granularity HCAL ~30 TByte data collected (>300 M ev) ongoing analysis to study shower separation in the HCAL data first prove of principle of Particle Flow true PFlow studies require a complete detector system + B field next generation of prototypes for test beam experiments Next generation HCAL prototype (EUDET): -solve technical issues -mechanics -integrated electronics -scalable to ILD CALICE installation at CERN SPS ECAL CALICE DATA

Tracking / Vertexing R&D A large Time Projection Chamber prototype: international effort: LC-TPC, EUDET, Tracking / Vertexing R&D A large Time Projection Chamber prototype: international effort: LC-TPC, EUDET, Alliance, KEK, CERN Particle Flow requires an excellent tracking detector DESY goal: - demonstrate the feasibility of a Micro-Pattern Gaseous Detector TPC - offer an infrastructure to do extensive tests of different gas amplification systems Initial installation and operation in DESY test beam 1. 2 T magnet on loan from KEK Test beam telescope for silicon vertex detector tests: DESY supports the world wide effort to compare different technologies for a silicon vertex detector support central services needed to operate the detector - power and cooling schemes - test beam telescope with high precision and readout speed (EUDET project) preparation for a future lepton collider - Erika Garutti 16

Forward calorimeter Belorussia, France, Germany, Israel, Japan, Poland, Romania, Russia, Serbia, Switzerland, UK, USA Forward calorimeter Belorussia, France, Germany, Israel, Japan, Poland, Romania, Russia, Serbia, Switzerland, UK, USA functions: - precise and fast measurement of the luminosity - electron veto down to lowest polar angles challenges: - radiation hard sensors - fast readout setup for sensor irradiation tests in an high intensity electron beam Testbeam equipment for diamond sensor performance studies using the EUDET telescope integration of Beam. Cal into the ILD detector 17

ILC project: DESY and III parties funds • ILC project is very successful is ILC project: DESY and III parties funds • ILC project is very successful is acquiring III party funds • the costs are shared between DESY and III parties funds ~ 50/50 • the contribution of DESY is expected to continue over the next funding period to maintain the leading role achieved during this time preparation for a future lepton collider - Erika Garutti 18

Summary & outlook DESY (together with the international community) is preparing for the decision Summary & outlook DESY (together with the international community) is preparing for the decision to build the ILC: • address the key issues of the accelerator (as part of the Global Design Effort) - strengthen the synergy with TTF/FLASH & XFEL (a 10% ILC prototype) - industrialization of superconductive RF cavities production • lead the international effort toward a detector for ILC - maintain central role in ILD - pursue R&D projects - exploit spin-off applications DESY is committed to a lepton collider as the next big particle physics facility preparation for a future lepton collider - Erika Garutti 19

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