The ILC Outlook

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• The ILC Outlook

Barry Barish HEP 2005 Joint ECFA-EPS Lisbon,
Portugal 23-July-05
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International Technology Review Panel
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The ITRP Recommendation

• We recommend that the linear collider be based on
  superconducting rf technology
• This recommendation is made with the
  understanding that we are recommending a
  technology, not a design. We expect the final
  design to be developed by a team drawn from the
  combined warm and cold linear collider
  communities, taking full advantage of the
  experience and expertise of both (from the
  Executive Summary).

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The SCRF Technology Recommendation

• The recommendation of ITRP was presented to ILCSC
  ICFA on August 19, 2004 in a joint meeting in
  Beijing.
• ICFA unanimously endorsed the ITRPs
  recommendation on August 20, 2004

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Starting Point for the GDE
Superconducting RF Main Linac
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The Community then Self-Organized
Nov 13-15, 2004
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• The Global Design Effort

Formal organization begun at LCWS 05 at
Stanford in March 2005 when I became director of
the GDE
Technically Driven Schedule
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GDE Near Term Plan

• Schedule
• Begin to define Configuration (Aug 05)
• Baseline Configuration Document by end of 2005
• --------------------------------------------------
  ---------------------
• Put Baseline under Configuration Control (Jan 06)
  
• Develop Reference Design Report by end of 2006
• Three volumes -- 1) Reference Design Report 2)
  Shorter glossy version for non-experts and
  policy makers 3) Detector Concept Report

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Snowmass Workshop Aug 2005
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Snowmass GDE Takes Over
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Key Near-Term Design Choices

• Accelerating Gradient
• Positron Production mechanism
• Design of Damping ring
• Site-specific considerations One or two
  tunnels? Shallow or deep?, etc
• Total cost will be a key determining factor in
  our ability to get the ILC built. Therefore cost
  optimization of all systems is of primary
  importance

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Accelerator Physics Challenges

• Develop High Gradient Superconducting RF systems
• Requires efficient RF systems, capable of
  accelerating high power beams (MW) with small
  beam spots(nm).
• Achieving nm scale beam spots
• Requires generating high intensity beams of
  electrons and positrons
• Damping the beams to ultra-low emittance in
  damping rings
• Transporting the beams to the collision point
  without significant emittance growth or
  uncontrolled beam jitter
• Cleanly dumping the used beams.
• Reaching Luminosity Requirements
• Designs satisfy the luminosity goals in
  simulations
• A number of challenging problems in accelerator
  physics and technology must be solved, however.

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Detector Concepts and Challenges

• Three concepts under study
• Typically requires factors of two improvement in
  granularity, resolution, etc. from present
  generation detectors
• Focused RD program required to develop the
  detectors -- end of 2005
• Detector Concepts will be used to simulate
  performance of reference design vs physics goals
  next year.

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Conclusions

• Remarkable progress in the past two years toward
  realizing an international linear collider
• important RD on accelerator systems
• definition of parameters for physics
• choice of main linac technology
• start the global design effort
• funding agencies are engaged
• Many major hurdles remain before the ILC becomes
  a reality (funding, site, international
  organization, detailed design, ), but there is
  increasing momentum toward the ultimate goal ---
  An International Linear Collider.