Author archive: Barry Barish

About Barry Barish

Barry Barish is Linde Professor, Emeritus at the California Institute of Technology Caltech. From 2005 to 2013 he was Director of the Global Design Effort and, apart from leading the collaboration to the publication of the ILC's Technical Design Report, wrote more than 300 Director's Corners.

Ten Years and Counting…

| 20 August 2015 As is appropriate for an anniversary issue, this week's Director's Corner is authored by Barry Barish, who led the project from its conception in 2005 through major milestones up to the publication of the Technical Design report in 2013 and the formation of the Linear Collider Collaboration. He looks back at past achievements and advises the linear community to remain very, very patient. Category: Director's Corner | Tagged: , , , , , , , ,

The Global Design Effort completes its mandate in style and substance

| 13 June 2013 The Global Design Effort has completed its mandate to produce a technical design for the ILC. Yesterday’s official handover of the Technical Design Report to ICFA was the culmination of a celebratory three continent event this week. The discovery of the Higgs particle at the LHC at CERN, the production of a viable design for a complementary electron-positron linear collider and the interest of the Japanese in hosting this machine combine to greatly encourage our communities’ hopes and dreams of building the ILC. Category: Director's Corner | Tagged: , , , , , ,

Demonstrating the ILC final focus parameters

| 2 May 2013 A key feature of the ILC is that it is a single-pass machine. In contrast to a circular accelerator, where the beam goes around many times, the ILC beams pass through each accelerator element only once, including the interaction point. For the accelerator, this means that for each accelerating module, the machine must be very efficient at transferring wall power into the machine beam, with the added requirement that the final beam must emerge with very low emittance so that it can be focused to the very tiny beam spot required to achieve high luminosity. The ATF-2 at KEK is a special test beam line that has been built to demonstrate the ability to achieve ILC-like namometre beam spots and stabilise them. Recent tests have demonstrated beam spots that are within a factor of two of the ILC design and promise to improve in the future. Category: Director's Corner | Tagged: , , , ,

ILC TDR cost under review

| 7 March 2013 The final deliverable of the Global Design Effort, the ILC Technical Design Report, was completed and submitted in draft form to the International Linear Collider Steering Committee in November 2012. Following a successful technical review of the design in December, an International Cost Review was conducted in February of the value estimate. The cost review validated the TDR value estimates, and pointed out other costing efforts that will be needed as the ILC becomes a site-specific construction project. Category: Director's Corner | Tagged: , , , , ,

A time of transition, or When men and mountains meet

and | 21 February 2013 Today represents a crossroads in the global efforts towards a linear collider. We are officially making the transition from the International Linear Collider Steering Committee and Global Design Efforts to the new Linear Collider Board and Linear Collider Collaboration that will coordinate the next phase of the global R&D towards a high-energy electron-positron collider to complement the LHC. GDE Director Barry Barish and LCC Director Lyn Evans share their vision in a joint Director’s Corner. Category: Director's Corner | Tagged: , , , ,

TDR review season is underway

| 7 February 2013 The draft of the ILC Technical Design Report (TDR) was completed last November and submitted for review. On 13 and 14 December, the TDR underwent a technical review at KEK by an augmented ILCSC Program Advisory Committee. The review report endorses the technical design we have presented and recommends “no changes in the TDR.” The report does identify areas and items to address in the future. Category: Director's Corner | Tagged: , , , , ,

Happy New Year! Reflections on 2012

| 10 January 2013 Last year was an especially exciting year for particle physics with the discovery of a 126-GeV particle that appears to be the long-sought Higgs boson. This event is likely to be the most important discovery in decades: the observation of a new kind of particle that signals the mechanism for creating mass in the universe. These impressive early results already point to future directions for the LHC, and more broadly for particle physics. In fact, closer to home, this discovery is providing strong motivation for a Japanese initiative for a staged approach to the ILC, beginning with a ~250 GeV Higgs factory, with the capability of increasing the energy in the longer term. Category: Director's Corner | Tagged: , , , ,

Mitigating electron cloud effects for the ILC

| 20 December 2012 One of the key objectives of the ILC R&D programme during the Technical Design Phase has been to characterise electron cloud effects in an ILC-like low-emittance positron damping ring and to test proposed mitigation techniques. The centerpiece of our efforts has been the CesrTA programme that involved reconfiguring it as an ILC-like low emittance ring and instrumenting it to carry out these studies. CesrTA has been a highly successful experimental programme, leading to reliable mitigation strategies for the ILC positron damping rings. Category: Director's Corner | Tagged: , , ,

Major goal achieved for high-gradient ILC SCRF cavities

| 21 November 2012 One of the most important goals of the Global Design Effort has been to demonstrate that high-gradient cavities can be reliably produced in industry. We established two gradient goals: to produce cavities qualified at 35 Megavolts per metre (MV/m) in vertical tests and to demonstrate that an average gradient of 31.5 MV/m is achievable for ILC cryomodules. Furthermore, we set a goal of producing these high-gradient cavities in industry with 50% yield by 2010 and 90% yield by the end of 2012. We have recently achieved these ambitious goals! Category: Director's Corner | Tagged: , , ,

Special Linear Collider Event during the IEEE Symposium

| 8 November 2012 The Institute of Electrical and Electronics Engineers (IEEE) held a “Special Linear Collider Event” as part of their 2012 Nuclear Science Symposium and Medical Imaging Conference at Anaheim, California. The special event, held on 29 and 30 October, came on the heels of the discovery of a Higgs-like particle at the LHC at CERN this summer and included an array of leaders in the field. There were presentations on the International Linear Collider (ILC) and Compact Linear Collider (CLIC) accelerators as well as detector concepts, the potential impact of the LC technologies for industrial applications and a forum discussion about future LC perspectives. Category: Director's Corner | Tagged: , , , ,
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