ECFA Study of Physics and Detectors for a Linear Collider

ECFA Study of Physics and Detectors for a Linear Collider

Topic of the Study Goals Working Groups Upcoming Events LC Notes Technology Choice Topics of Interest
ECFA Organizing committee Worldwide Linear Collider Studies Official and Press Statements on Linear Collider Policy Extended ECFA/DESY Study (2001-2003) 2nd ECFA/DESY Study (1998-2000) DESY

 Upcoming events:   2021 International Workshop on Future Linear Colliders (LCWS2021), 15th-18th March 2021

Physics and Detector Meetings
ECFA Workshops
  First ECFA Workshop, Montpellier, France, 13-16 November 2003  (Speakers slides)
  Second ECFA Workshop, Durham, UK, Sep 1-4, 2004  (Speakers slides)
 Third ECFA Workshop, November 14-17, 2005, Vienna  (Speakers slides)
 ILC-ECFA Workshop and GDE Joint Meeting, Valencia, 6-10 November 2006  (Speakers slides)
 ILC-ECFA Workshop, Warsaw, Poland, 9-12 June 2008  (Speakers slides)
 ECFA-CLIC-ILC joint meeting: International Workshop on Linear Colliders 2010, CERN and CICG, Geneva, Switzerland, 18-22 Oct 2010  (Speakers slides)
 ECFA Linear Collider Workshop 2013 (LC2013), DESY, Germany, May 27-31, 2013  (Speakers slides)
Other important workshops
  LCWS 1991, Saariselka, Finland  (Proceedings)
  LCWS 1993, Waikoloa, Hawaii, 26-30 Apr 1993  (Proceedings)
  LCWS 1995, Iwate, Japan, 8-12 Sep 1995  (Proceedings)
  LCWS 1999, Sitges, Barcelona, Spain, 28 Apr - 5 May 1999  (Proceedings Vol. 1)  (Proceedings Vol. 2)  (Proceedings)
  LCWS 2000, Fermlab, Batavia, Il., 24-28 Oct 2000  (Speakers slides)  (Proceedings)
  LCWS 2004, Paris, 19-23 April 2004  (Proceedings)
  LCWS 2005, SLAC, Mar 18-22, 2005  (Speakers slides)  (Proceedings)
  LCWS 2006, Bangalore, March 9-13, 2006  (Speakers slides)  (Proceedings)
  LCWS 2007 - ILC 2007, DESY, Hamburg, 30.5.2007 - 4.6.2007  (Speakers slides)  (Proceedings)
  LCWS 2008 - ILC 2008, University of Illinois at Chicago, November 16-20, 2008  (Speakers slides)  (Proceedings)
  LCWS 2010 - ILC 2010, Beijing, China, March 26-30, 2010  (Speakers slides)  (Proceedings)
  LCWS 2011 - Granada, Spain, Sept 26-30, 2011  (Speakers slides)  (Proceedings)
  LCWS 2012 - University of Texas, Arlington, USA, October 21-26, 2012  (Speakers slides)  (Proceedings)
  LCWS 2013 - The Univeristy of Tokyo, Japan, Nov 11-15, 2013  (Proceedings)
  LCWS 2014 - Vinca Institute of Nuclear Sciences, Belgrade, Serbia, 6-10 October 2014  (Proceedings)
  LCWS 2015 - Fairmont Chateau Whistler Hotel, Whistler B.C., Canada, 02-06 November 2015  (Proceedings)
  LCWS 2016 - Aiina Center & MALIOS, Morioka,IWATE,Japan, December 5 - 9, 2016  (Proceedings)
  LCWS 2017 - Strasbourg, France, Oct 23-27, 2017
  LCWS 2018 - Arlington, Texas, USA, Oct 22-26, 2018
  LCWS 2019 - Sendai, Japan, Oct 28 - Nov 1, 2019
  LCWS 2021 - Online format, Mar 15 - 18, 2021
  AWLC2020 - Americas Workshop on Linear Colliders, Virtual Conference hosted by SLAC, USA, October 19-22, 2020
  ALCW 2018 - Asian Linear Collider Workshop, Fukuoka, Japan, 28 May to 1 June 2018
  AWLC17 - 2017 Americas Workshop on Linear Colliders, SLAC, Menlo Park, CA, USA, June 26-30, 2017
  ALCW 2015 - Asian Linear Collider workshop 2015, KEK Tsukuba, Japan, April 20-24, 2015.
 TILC08, Joint ACFA Physics and Detector Workshop and GDE meeting on the International Linear Collider (TILC08), Sendai, Japan, March 3 to 6, 2008  (Speakers slides)
 TILC09, Joint ACFA Physics and Detector Workshop and GDE meeting on the International Linear Collider (TILC09), Tsukuba, Japan, April 17 to 21, 2009  (Speakers slides)
  8th ACFA Workshop on Physics and Detector at the Linear Collider, Daegu, Korea, July 11-14, 2005.  (Speakers slides)
  9th ACFA ILC Physics and Detector Workshop & ILC GDE Meeting, IHEP, Beijing, Feb. 4-7, 2007.  (Speakers slides)
  KILC12, Joint ACFA Physics and Detector Workshop and GDE Meeting on Linear Collider, Daegu, Korea, Apr. 23-27, 2012.  (Speakers slides)
  2005 ILC Physics and Detector Workshop and 2nd ILC Accelerator Workshop, ALCPG workshop, Snowmass, Colorado, August 14-27, 2005.
 3rd linear collider forum, 7-9 Feb 2012, DESY, Hamburg, Germany  (Speakers slides)
Meetings of working groups between main ECFA Workshops
Conferences, Workshops, and Schools related to this study (upcoming events)
Proceedings of the ECFA/DESY Extended Study (pdf, 8.5 MBytes)
International Linear Collider Meetings and Links
ICFA International Committee for Future Accelerators
ILC International Linear Collider
ILC Newsline
GDE Global Design effort
  First ILC Workshop "Towards an International Design of a Linear Collider", KEK, Japan, Nov 13-15, 2004. Speakers slides: Plenary, working groups.
 International Workshop on ILC beam delivery, together with the ILC-Europe meeting (EUROTeV and ELAN), RHUL, June 20-23, 2005.
  2005 ILC Physics and Detector Workshop and 2nd ILC Accelerator Workshop, ALCPG workshop, Snowmass, Colorado, August 14-27, 2005.
  The Photon and PLC2005, Warsaw and Kazimierz, Poland, 30-Aug to 08-Sep-2005 The Photon: Its First Hundred Years and the Future, contains a PLC2005 - the Photon Collider Workshop and Lectures on Future Colliders and Astrophysics
Topics of Interest to the Study
Topics of interest to this study
Working Groups
Working groups and their convenors
Detector R&D topics of interest
Reference lists
Parameters of the high luminosity TESLA e+e- linear collider
List of reference reactions for detailed feasibility studies
ILCSC parameters document
Worldwide Study (WWS)
International Linear Collider
Worldwide Study of the Physics and Detectors for Future Linear e+e- Colliders
  Detector Concepts Studies for the ILC
  Detector R&D for the ILC
  Authorlist for the ILC Detector Concept Report (DCR)
Subscribtion form to become an author for the ILC Detector Conceptual Report (Physics and Detector Chapter)
Everyone interested in the ILC is invited to subscribe.
  Report of the International Linear Collider Technical Review Committee - 2003 (Greg Loew Report)
  WWS committee on the organization of the global experimental program, summary presented by Hitoshi in the Victoria Plenary session (pdf)
Worldwide consensus statement in support of the linear collider
 "Understanding Matter, Energy, Space and Time: The Case for the e+e- Linear Collider" pdf file (70 kBytes)
  This document has been prepared by the World Wide Physics and Detectors Study Group.
It is intended to set out the scientific case for a 500 GeV e+e- linear collider, upgradable to higher energy in future and with options retained for special investigations with alternate beam particles and added polarization capability.

We are asking everyone who wants to be listed as a supporter to go to the sign-up web page.
The list, to be made available on the International LC web page, will serve as a demonstration of the widespread support in the community for the linear collider.
See also the updated letter distributed by Jim Brau, Sachio Komamiya and David Miller.

Roadmap for Detectors
  Preliminary views of the WWS co-chairs on a possible roadmap for detectors in the coming years.
  The WWS co-chairs, Jim Brau, Francois Richard, and Hitoshi Yamamoto:
"Please recall that ILCSC/ICFA has asked the WWS co-chairs, during the Beijing ACFA meeting, to present a proposal for such a roadmap for LCWS07...."
Call for Letters of Intents to produce detector Engineering Designs Reports for ILC
  Guidelines for the definition of a Letter of Intent (Oct. 3, 2007)
  Shin-ichi Kurokawa, Chairman of the International Linear Collider Steering Committee:
"The International Linear Collider Steering Committee (ILCSC) announces a call for Letters of Intent (LOIs) to produce reference designs for the two ILC detectors. These designs will be detailed in two Engineering Design Reports (EDRs) to be completed on the timeline of the machine EDR being prepared by the Global Design Effort. The guidelines for the LOIs are presented in the appended document and a public presentation of the WWS roadmap for detectors can be found in the LCWS07 web site. The LOIs should be sent to the ILCSC by October 1, 2008 and will be reviewed by an advisory body appointed with the approval of ILCSC. This body, together with a management team led by the Research Director Sakue Yamada who has been appointed by ILCSC, will start a process leading to the formation of two groups capable of preparing the two engineering designs and the EDR documents."
  Call for Expression of Interest (March 11, 2008)
  Sakue Yamada, Research Director of ILC
"The International Linear Collider Steering Committee of ICFA decided on February 11 to modify last October's call for Letters of Intent (LOIs) for ILC detectors in accordance with the new timeline of the Global Design Effort (GDE). The detectors are to be implemented in the ILC technical design, which will be completed in 2012. Given the stretched out GDE replan, the due date of the LOIs is shifted by one-half year to March 31, 2009....
In order to identify the groups which will submit LOIs, we call for an Expression of Interest (EOI).... "
Regional Linear Collider Studies
European Design Study Towards a Global TeV Linear Collider
ACFA Joint Linear Collider Physics and Detector Working Group
ILC-Asia: Asian Regional Team for ILC Accelerator Development
American Linear Collider Physics Group
Linear Collider Physics Study at Fermilab
American Working Group on Linear Collider Accelerator Technology
Physics Study Group for the CLIC e+e- linear collider
LC-ABD consortium of UK groups (Linear Collider: Accelerator and Beam Delivery)
UCLC (University Consortium for Linear Collider R&D)
Proposal to ECFA for a new Linear Collider Study, September 2002
  As the organizing committee of the Extended ECFA/DESY Study, we propose that ECFA should support these activities for a further two years, from Spring 2003. The three ECFA supported studies so far have played an enormously important role in preparing the case for the linear collider. This case has been endorsed by representative bodies in Europe, America and Asia. An International Linear Collider Steering Group has been formed, under the chairmanship of Maury Tigner, to promote the programme. It is relying on the studies in the three regions to provide input on Physics and Detectors. Both the USA and Asia plan continued studies. The present ECFA/DESY Study involves a widely distributed group of experimenters and theorists doing feasibility studies, fundamental calculations and R&D. The momentum of this work in Europe needs to be kept up to maintain our contribution to the formation of an international user community.
ECFA accepted this proposal at their 29 November 2002 plenary meeting. The new 'ECFA Study of Physics and Detectors for a Linear Collider' will run to Spring 2005.
Goals of the ECFA Study on Physics and Detectors for a Linear Collider


  • to contribute to the development of a Global Linear Collider programme by encouraging international collaboration on the physics case, on detector R&D and on the machine-detector interface.
  • to participate in the international LCWS workshops (the Saariselka series).
  • to explore ways of co-ordinating and perhaps integrating the regional and worldwide workshop series.

Detector design, R&D, Simulation

  • to design, build and test detector prototypes (with inter-regional collaboration).
  • to maintain the detector design, and critically review its performance on all important physics channels.
  • to build up a modern simulation framework (both for detector and physics studies) sharing resources with the other regions whenever possible
  • to prepare all tools necessary for a "simulated data challenge"

Machine-Detector Interface

  • study the impact of realistic beams and the associated backgrounds on the detector.
  • when the linac technology and crossing angle choice has been made, update all designs to match.
  • interact with the designers of the beam delivery system to ensure that physics goals can be achieved.
  • participate in planning and R&D for polarimetry, beam energy measurement, beam monitoring, luminosity measurement.
  • study the special requirements of the gamma-gamma, e-gamma and GigaZ options.

Physics Case

  • co-operate with LHC colleagues to develop and present the arguments for concurrent running of LC and LHC.
  • explore the connections between the LC physics programme and cosmology.
  • continue to upgrade feasibility studies on important physics channels, with more realistic beam, background and detector simulation.
  • before the linac technology choice is made (end 2004), explore any differences between the physics capabilities of the candidate technologies.
  • study quantitatively the potential systematic limitations on measurements and look for ways around them.
  • quantify the physics benefits from options to upgrade or vary the LC programme: from the energy upgrade, from e- e-, e- gamma and gamma gamma, from the Giga Z, from e+ polarisation, from narrower beam energy spread, from better polarimetry and spectrometry.
  • in the Loopverein: continue to improve precision of Standard Model and Supersymmetric predictions to match the expected precision of experimental measurements with the LC.
  • to continue to investigate new theoretical ideas, both strategic and methodological.
  • to continue development of Monte Carlo generators suitable for LC physics.
Organizing committee
 Organizing Committee of the ECFA Study of Physics and Detectors for a Linear Collider (last update 2010)
 Chair: François Richard, LAL Orsay
  Ties Behnke, DESY
Grahame Blair, Royal Holloway, U London
Mario Calvetti, LNF Frascati
Mikhail Danilov, ITEP, Moscow
Albert de Roeck, CERN
Sergio Bertolucci, CERN
Jean-Pierre Delahaye, CERN
Eckhard Elsen, DESY
Juan Fuster, IFIC Valencia
Joachim Mnich, DESY
Wolfgang Hollik, MPI Munich
Leif Jönsson, Lund
Jan Kalinowski, Warsaw
Marcello Piccolo, Frascati
Ron Settles, MPI Munich
Valery Telnov, Novosibirsk
Jan Timmermans, NIKHEF
Vaclav Vrba, Prague
Tatsuya Nakada, CERN (ECFA Chair)
ECFA Study of Physics and Detectors for a Linear Collider
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