The ILC Outlook Barry Barish HEP 2005 Joint

The ILC Outlook Barry Barish HEP 2005 Joint ECFA-EPS Lisbon, Portugal 23 -July-05 22 -July-05 HEP 2005 - Barish

International Technology Review Panel 22 -July-05 HEP 2005 - Barish 2

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). 22 -July-05 HEP 2005 - Barish 3

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 ITRP’s recommendation on August 20, 2004 22 -July-05 HEP 2005 - Barish 4

Starting Point for the GDE 22 -July-05 Superconducting RF Main Linac HEP 2005 - Barish 5

The Community then Self-Organized Nov 13 -15, 2004 22 -July-05 HEP 2005 - Barish 6

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 22 -July-05 HEP 2005 - Barish

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 22 -July-05 HEP 2005 - Barish 8

Snowmass Workshop – Aug 2005 22 -July-05 HEP 2005 - Barish 9

Snowmass – GDE Takes Over 22 -July-05 HEP 2005 - Barish 10

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 22 -July-05 HEP 2005 - Barish 11

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. 22 -July-05 HEP 2005 - Barish 12

Detector Concepts and Challenges • Three concepts under study • Typically requires factors of two improvement in granularity, resolution, etc. from present generation detectors • Focused R&D 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. 22 -July-05 HEP 2005 - Barish 13

Conclusions Remarkable progress in the past two years toward realizing an international linear collider: important R&D on accelerator systems definition of parameters for physics choice of main linac technology start the global design effort funding agencies are engaged v 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. 22 -July-05 HEP 2005 - Barish 14