European Design Study Towards a Global TeV Linear Collider

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European Design StudyTowards a Global TeV Linear
Collider

• Susan L Smith

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Content

• EUROTeV Bid
• Goals
• Proposal
• Participating Institutes
• Work packages UK participation
• Budget
• Outcome of the bid
• Status
• CARE ELAN

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Goal of the Design Study

• European Particle Physics and Accelerator
  Laboratories intend to contribute to a unique
  research facility of worldwide relevance, the
  Global Linear Collider
• EU Contribution addresses
• Feasibility Studies
• Preparatory Work
• European effort naturally merges with similar and
  complementary efforts undertaken in Asia and
  America to enable construction of such a facility

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Focus of the Design Study
Generic Linear Collider
ITRP decision 2004for ILC 0.5-1.0 TeV collider

• NLC TESLA LINAC Technologies mature
• ILC-TRC (2003) concluded still many outstanding
  RD items common to all designs (LINAC technology
  independent)
• Focus of FP6 bid is a subset of these RD items
  to form the European contribution to an
  International Linear Collider Design

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The ILC and International Design Effort
TDR phase
Eng. RD
construction
International Linear Collider Design Team Concept

• ILC Road Map for the Global Linear Collider
• 2004 Formation of Central Design Group with
  Regional Design Teams
• 2005-2008 International Design Phase
• Re-evaluation of existing concepts
• Design of true International Machine
• Tackle outstanding (critical) RD (TRC)

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FP6 Design Study Proposal
Formation of theEuropean Design Team Initial
focus on TRC tech. Independent RD
Damping Rings
Global Accelerator Network
Beam Delivery System
International Linear Collider Design Team Concept
Luminosity Stability Studies
Diagnostics
Polarised Positron Source
Metrology Stabilisation
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EUROTeV Work Package Structure
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European Added Value

• Physics Roadmap
• Europe Contributes to the Understanding of the
  Fundamental Laws of Nature
• World-wide consensus
• ECFA has endorsed LC as the highest priority
• Keeping Europe at the forefront of accelerator
  development
• Advancing LC Technologies in Europe
• Longstanding expertise
• Development of sophisticated Technologies
• Numerous spin-offs, e.g. SLS, FEL and XFEL,
  medical treatment, computational methods
• Science Opportunities and Training Ground

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Scientific and Technological Excellence

• Advanced accelerator technologies
• Acceleration of ultra-low emittance beams
• Beam stabilisation at the nm level
• Polarised Sources
• Global Accelerator Network
• Advanced communication techniques
• Remote controls
• towards a Global Linear Collider

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Participating Institutes
27 Institutes CCLRC (RALDL) 9 UK Universities
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WP1 MNGMNT Management Coordinator Eckhard
Elsen, DESY
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Organisation

• Tasks coordinated by WP coordinators
• Steering Committee consists of WP coordinators
  MNGMNT
• International Scientific Advisory Committee
  addresses relevance and oversees integration with
  worldwide efforts

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International Context
From individual attempts on WP in institutes to
European Design Study merging coherently with
the worldwide design efforts for a LC
EUROTeV ILC
WP
Institutes
Asia America Europe
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WP2 BDS Beam Delivery System Coordinator Susan
Smith, CCLRC
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WP2 Overall Goal

• Develop and evolve a BDS optics design to allow
  the specification of beam delivery system
  components in conjunction with the output of the
  DIAG and BDYN WP
• Progress the design concept of critical
  components of the BDS, specifically the final
  focus quadrupoles, the wakefield modelling and
  design of collimation systems, fast feedback
  systems and the crab cavity system

Participants CCLRC, CERN, CEA, TU Darmstadt,
Lancaster Uni., Queen Mary Uni, Manchester Uni
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BDS Goals
Design Optimisation ofFinal Focus system
Studies of SC Quadrupolesfor us as Strong Final
IR Quads
FF System
Crab Cavity Prototyping
BDS
Design Optimisation ofCollimation System
Coll System
Mechanical Spoiler Design Prototyping
Spoiler Design
Spoiler Wakefield Calculations
Fast Beam-BasedFeedback System(s) RD
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Beam Delivery System UK Participation

• CCLRC Lattice design for BDS Collimation
  simulations, hardware beam test N/C crab cavity
  design, prototype, test Development of fast
  feedback systems (BPM)
• Lancaster Crab cavities and associated RF
  system design study, Collimator wakefield
  calculations
• Queen Mary Design and fabrication of prototypes
  of beam-based feedback components BPMs, fast
  kickers, driver amplifiers, feedback circuits,
  Testing of prototypes with beam.
• Manchester Effect of particle interactions on
  the collimators and spoilers technology

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WP3 DR Damping Rings Coordinator Susanna
Guiducci, INFN-LNF
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WP3 Overall Goal

• Study of problems related to the low emittance
  achievement
• Emittance tuning (orbit, dispersion and coupling
  correction) ? with Diagnostics and Beam
  Dynamics
• Dynamic aperture optimization
• Kickers/Deflectors
• Design of CTF3 extraction kicker
• Study of RF deflectors scheme for TESLA DR
• Impedance calculations (kickers, deflectors and
  Combiner Ring vacuum chamber)
• e-cloud, and Vacuum design ? with Beam
  Dynamics
• NEG coating
• Measurements of photoelectron yields.
• Participants CCLRC, CERN, DESY, INFN

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DR Goals
Study of low emittance tuning algorithms
Dynamic Aperture Optimisation in Wiggler
Dominated Systems
Development of RF Separators
Tests in CTF3
Damping Ring
Development of Fast Kicker Systems
NEG Vacuum Technology RD
Low SEC Coating Technology
Vac. system
e-cloud sol.
Electron Cloud (and other instabilities) Studies
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Damping Rings UK Participation

• CCLRC
• Emittance tuning algorithms,
• Testing of NEG material,
• Vacuum issues of electron cloud

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WP4 PPS Polarised Positron Source Coordinator
Achim Stahl, DESY
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WP4 Overall Goal

• Conceptual design of all infrastructure necessary
  to produce polarised positron beams for a linear
  collider with sufficient intensity and the
  highest possible degree of polarisation. The
  direction of the polarisation should be freely
  adjustable at the IP
• Full simulation of beams with polarisation all
  the way from the undulator to the IP
• Engineering design and prototyping of the most
  critical components

Participants CCLRC, DESY, HU Berlin, Liverpool
Univ, Durham Uni
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PPS Goals
S.C. Helical Undulator Development
Beam Tests
PM Helical Undulator Development
Performance Simulation
Spin Rotator Systems
PPS Model
PPS
Photon Collimator Conceptual Design
Target System Design
Capture System
Source Polarimeter Design
Polarimeter
Source Polarimeter Prototype
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Polarised Positron Source UK participation

• CCLRC 2 prototypes, comparison, final design,
  test undulator design and construction, beam
  test.
• Liverpool
• Undulator design, simulation and measurement of
  photon spectrum
• Photon collimator Simulation, engineering design
  
• Photon target Engineering design
• Spin transport Implementation of linac DR,
  simulation analysis
• Durham Theoretical calculations on spin
  depolarisation

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WP5 DIAG Diagnostics Coordinator Grahame
Blair, RHUL
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WP5 Overall Goal
The Linear Collider will need an unprecedented
concentration and quality of beam diagnostic
tools in order to deliver the required
luminosity. Some of these tools themselves will
require qualitatively new approaches and are
challenging projects in their own right. The
control system of the LC will need to combine all
the various diagnostic information in real time
and tune the system to respond to variations in
the beam due to ground motion, feedback
performance etc.
Participants CERN, DESY, LAL, Oxford Univ.,
RHUL, UCL, Cambridge Univ. Uppsala
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DIAG Goals
Laser Wire
Con-focal resonator pickup
Wide-Band Current Pickup
Diagnostics
Precision timing phase systems
Critical BPM technology
Precision Magnetic Spectrometerbased on nm level
BPM
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Diagnostics UK participation

• Oxford Evaluate laserwire technique, design
  electronics do beam tests
• Royal Holloway Scanning systems and electronics
  for the PETRA laser-wire. Optical design and data
  analysis. Simulation of laser-wire systems in the
  beam diagnostics section.
• UCL Studies of upstream spectrometer for beam
  energy determination. Development of beam
  position monitors which can withstand beamline
  conditions. Integration of beamline spectrometry
  into determination of the luminosity spectrum.
• Cambridge Studies of upstream spectroscopy for
  beam energy determination. Beam tests of Beam
  Position Monitors to access their precision and
  stability for this task. Integration of
  spectrometer into design of Beam Delivery System.
  

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WP6 BDYN Luminosity Stabilisation Studies (Beam
Dynamics) Coordinator Daniel Schulte, CERN
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WP6 Overall Goal

• Overall Goal
• Develop and use the necessary models and tools to
  reliably predict the luminosity performance of a
  future LC
• Requirements
• Development and coding of tuning strategies
• Development and implementation of realistic models

Participants CERN, DESY, LAL, PSI, Uppsala,
Royal Holloway, Queen Mary, Manchester
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BDYN Goals
LET Simulation Package (application development)
Luminosity Tuning Simulations (inc. static
dynamic errors)
Lumi opt. stability
Beam-based Feedback Studies (optimisation)
Integrated Luminosity Performance
Halo Build-up and Detector background Studies
Design of path-length tuning chicane
Bunch Compressor Studies
(Further) development of e-Cloud theory and
modelling codes
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Beam Dynamics UK Participation

• Royal HollowayFurther development and
  application of GEANT-based simulation code.
  Support code on GRID. Study of secondary
  background due to collimation, emphasis on the
  effect of synchrotron radiation and its impact on
  the collimation system design.
• Manchester Study of secondary background
  production in collimation region and its impact
  on the system design emphasis on muons and
  neutrons. Benchmarking GEANT4 and FLUKA
  simulations.
• Queen Mary Develop static alignment procedures
  and feedback systems for BDS. Support codes on
  GRID. Participate in code benchmarking.

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WP7 METSTB Metrology and Mechanical
Stabilisation Coordinator Yannis Karyotakis,
LAPP
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Overview

• Study of the ground motion and cultural noise
• Develop alignment methods and instrumentation
  that allow for a rapid high precision alignment
  of the complete accelerator
• Develop an active stabilization method and
  instrumentation at a nanometer level for the
  final focus magnets
• Extend usability of the stabilization to other
  critical magnets in the BDS by developing cost
  effective lower resolution derivatives of the FF
  system solutions

Participants DESY, LAPP, CCLRC, Oxford Univ.
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METSTB Goals
Precision Laser Alignment System (LICAS)
Optical Anchoring Techniques
Motion Sensors and Actuators (Industrial Study)
Active Mechanical Stabilisation
Active Stabilisation FeedbackElectronics /
Algorithms
Component Alignment and Stabilisation
Critical FD (IR) Magnet Model
Precision Measurement of Ground Vibration Spectra

Ground Motion Characterisation
Refinement of Ground Motion Models, inc.
cultural noise
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Metrology and Mechanical Stabilisation UK
Participation

• Oxford Build prototype Rapid Tunnel Reference
  System, test in DESY tunnel, Develop and test
  Michelson-FSI Interferometer for FF vibration
  sensing
• CCLRC Modelling of ground motion and vibrations

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WP8 GANMVL Global Accelerator Network Multipurpos
e Virtual Laboratory Coordinator Ferdinand
Willeke, DESY
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WP8 Overall Goal

• Design and build a collaborative tool for
• far Remote Observation and
• far Remote Control of accelerator components or
  experiments at accelerators with
• full control of equipment and the program of
  work,
• with combined high quality audio and video and
• full sharing of managed information
• MVL will be a tool to demonstrate and gain
  experience that -
• accelerator components can be efficiently
  operated, maintained and repaired under the
  control of experts from remote sites
• geographically dispersed experts can work
  together in a virtual team

Participants DESY, GSI, Elettra, FHG-IGD,
INFN-Milano, INFN-Roma2, INFN-LNF, University
Udine, University Mannheim
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Budget
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Requested by Country, total request 11.25M
Total budget 28 M
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Requested by Country/UK Institute
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Requested By Work Package
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Outcome of the bid

• EUROTeV ranked second in the scientific
  evaluation
• Recommended approval of 9M which is less than
  the 11.2M bid
• The recommendation is that the host institutes
  makeup the shortfall to ensure that the scope of
  the project is maintained!
• Overall the UK host contribution is around twice
  the UK request. This is around twice the relative
  contribution of other countries which generally
  commit just over the matching funds required by
  the bid call.

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Status

• ITRP Review proceeding , a decision should be
  announced during the summer
• Global Design Initiative (GDI) starts discussion
  on the structure of global design approach,
  regional initiatives play an important role in
  optimisation of worldwide research program
• EUROTeV will assemble considerable resources
• Consider fine-tuning the proposed EUROTeV program
  in accordance with global research program
• EUROTeV starts in 2005 , funds will not be
  available before 2005
• Kick-off meeting to be organised by ELAN towards
  end 2004

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EUROTeV URL

• http//www-flc.desy.de/eurotev/

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CARE ELAN

• First ELAN workshop meeting was 2 ½ days
• Covered ELAN WP and the JRAs in parallel was a
  combination of network planning and scientific
  workshop
• ELAN
• LTECNC Normal conducting source, LTECSC Super
  conducting, BDYN Beam dynamics, INSTR
  Instrumentation, ANAD Advanced acceleration
• JRAs
• SRF Superconducting RF, PHIN Photoinjector,
• Next meeting is combined CARE and ELAN (November
  2nd - 5th _at_ DESY )

http//www.lnf.infn.it/conference/elan/