Linear Collider@CERN Workshop 2026

from Wednesday, 7 January 2026 (09:00) to Friday, 9 January 2026 (19:30)
CERN (503/1-001)

        : Sessions
    /     : Talks
        : Breaks
7 Jan 2026
8 Jan 2026
9 Jan 2026
AM
11:00
Executive session (closed) (until 13:00)
09:00
Plenary: accelerator baseline, upgrade options and physics&detectors status (until 13:10)
09:00 ESPPU update - Karl Jakobs (University of Freiburg (DE))  
09:25 Start-to-end simulations for ILC & CLIC - Andrea Latina (CERN)  
09:40 Accelerator design & integration considerations for a LinearCollider@CERN - Dr Benno List (Deutsches Elektronen-Synchrotron (DE))  
10:00 BDS for a Linear Collider @ CERN - Rogelio Tomas Garcia (CERN)  
10:15 CFS conventional facilities & siting for a LinearCollider at CERN - Edward Fraser MacTavish (CERN)  
10:30 Positron source for a linear collider: status and plans - Steffen Doebert (CERN)  
10:45 --- Coffee ---
11:10 Upgrades to higher energies - C3 & and SRF-based - Emilio Nanni Emilio Nanni (Unknown) Emilio Alessandro Nanni Emilio Nanni (SLAC National Accelerator Laboratory)  
11:25 Upgrades to highest energies - wakefield acceleration - Marlene Turner (CERN)  
11:40 Upgrades to highest luminosities (ERL-based schemes) - Peter Williams  
12:00 Gamma-Gamma Collider Option - Tim Barklow (SLAC National Accelerator Laboratory (US))  
12:15 e+e- detector concepts, focus on MDI & software/computing - Roman Poeschl (Université Paris-Saclay (FR))  
12:35 Beam dump & fixed target experiments - Patrick Koppenburg (Nikhef National institute for subatomic physics (NL))  
12:50 LCF cost estimate & introduction to parallel sessions - Jenny List (Deutsches Elektronen-Synchrotron (DE))  
09:00
Beyond Collider - Patrick Koppenburg (Nikhef National institute for subatomic physics (NL)) Ivo Schulthess (ETH Zurich) (until 12:00) (4/3-004 - TH Discussion Room)
09:00
JOINT AD&I accelerator design and parameters + CFS conventional facilities & siting -Dr Benno List (Deutsches Elektronen-Synchrotron (DE)) Erik Adli (University of Oslo (NO)) (until 10:30) (4/3-001)
09:00
Main linac technologies - SRF & CLIC & HL-RF & … - Marc Wenskat Walter Wuensch (CERN) Marc Wenskat (until 12:00) (53/R-044)
09:00
Priorities for sharpening the LC Physics case -Dr Junping Tian (The University of Tokyo) Marcel Vos (IFIC Valencia (ES)) Graham Wilson (The University of Kansas (US)) Juergen Reuter (DESY Hamburg, Germany) (until 12:00) (503/1-001 - Council Chamber)
09:00 Introductory Remarks - Graham Wilson (The University of Kansas (US))  
09:10 Physics studies for 10 TeV plasma based linear colliders - Simon Knapen  
09:30 New physics potential of TeV-scale colliders - Aleksander Zarnecki (University of Warsaw (PL))  
09:50 Top physics perspectives - Marcel Vos (IFIC Valencia (ES))  
10:10 Electroweak physics perspectives - Graham Wilson (The University of Kansas (US))  
10:30 --- Coffee Break ---
11:00 Improving the Higgs self-coupling analysis - Julie Munch Torndal (CERN)  
11:08 Probing new physics using 2-fermion topologies at LC featuring beam polarization and high energy reach - Roman Poeschl (Université Paris-Saclay (FR))  
11:16 Impact of quark flavor violating SUSY on h(125) decays at future lepton colliders - Keisho Hidaka  
11:24 Probing Dark Matter at Linear Colliders Using Extended Higgs Sectors - Juhi Dutta  
11:32 Discussion  
09:00
Upgrade Options (highE-RF, highE-WA, highL, gammagamma) - Marlene Turner (CERN) Tim Barklow (SLAC National Accelerator Laboratory (US)) Emilio Nanni (SLAC National Accelerator Laboratory) (until 12:00) (4/S-030)
09:00 Reminder of the Scope  
09:15 Discussion: Wakefield Accelerators  
10:00 Discussion: ERL  
10:30 Discussion: Gamma, gamma  
11:00 Work Plan + Prioritizing  
10:30 --- Coffee ---
10:30
JOINT AD&I accelerator design and parameters + CFS conventional facilities & siting (until 11:00)
11:00
JOINT AD&I accelerator design and parameters + CFS conventional facilities & siting (until 12:00)
PM
13:00 --- Lunch ---
14:00
Opening Plenary: EPPSU reports, overview and strategic talks (until 18:15)
14:00 Welcome - Mark Thomson (CERN)  
14:10 Charge to Linear Collider at CERN study and/or the Workshop - Jenny List (Deutsches Elektronen-Synchrotron (DE))  
14:25 Physics case of linear colliders - what we know and what we don’t know - Dr Junping Tian (The University of Tokyo)  
14:55 ITN status and how it could contribute to LinearCollider at CERN study - Shinichiro MICHIZONO (KEK)  
15:15 CLICX X-band and two-beam technology outlook - Walter Wuensch (CERN)  
15:35 CLIC & ILC: main linacs, BDS and IP parameters - differences and commonalities - Daniel Schulte (CERN)  
16:00 --- Coffee ---
16:30 ATF2 status & plans - Toshiyuki Okugi  
16:50 US Priorities for Future Collider Accelerator R&D - Spencer Gessner Spencer Gessner (SLAC)  
17:10 Japan’s take on LinearCollider at CERN - Masaya Ishino (University of Tokyo (JP))  
17:30 Status of CEPC and thoughts on a linear collider - Prof. Jie Gao (Institute of High Energy Physics, Chinese Academy of Sciences (CN))  
17:50 A linear collider at CERN:  Workplan for 2026-28 - Steinar Stapnes (CERN)  
18:30
Reception (until 20:00)
13:10 --- Lunch ---
14:00
Beam Delivery Systems, Extraction Lines & IR design - Rogelio Tomas Garcia (CERN) Dr Angeles Faus-Golfe (IJClab IN2P3 CNRS-Université Paris-Saclay (FR)) (until 16:30) (61/1-007 - Room B)
14:00 Gamma-gamma IR design - Tim Barklow (SLAC National Accelerator Laboratory (US))  
14:20 First look at a 10 TeV CoM BDS design - Keegan Everett Downham (Univ. of California Santa Barbara (US))  
14:45 FFS chromaticity correction for the Ghost collider - Bamunuvita Gamage (Jlab)  
15:05 Tools for the Beam Delivery System Design - Conrad Caliari  
14:00
CFS conventional facilities & siting - Edward Fraser MacTavish (CERN) Carlo Rossi (CERN) (until 16:30) (42/R-032)
14:00
Detector (focus on MDI / concept simulation) - Aidan Robson (University of Glasgow (GB)) Frank-Dieter Gaede (Deutsches Elektronen-Synchrotron (DE)) Roman Poeschl (Université Paris-Saclay (FR)) (until 16:30) (503/1-001 - Council Chamber)
14:00
JOINT AD&I accelerator design and parameters + CFS conventional facilities & siting - Erik Adli (University of Oslo (NO)) Dr Benno List (Deutsches Elektronen-Synchrotron (DE)) (until 16:30) (4/3-001)
14:00 AD&I accelerator design and parameters  
15:30 Joint with " Upgrade Options - wakefield accelerators"   (4/S-030)
14:00
Positron source - Steffen Doebert (CERN) Gudrid Moortgat-Pick (until 16:30) (4/3-004 - TH Discussion Room)
14:00
Upgrade Options (highE-RF, highE-WA, highL, gammagamma) - Marlene Turner (CERN) Tim Barklow (SLAC National Accelerator Laboratory (US)) Emilio Nanni (SLAC National Accelerator Laboratory) (until 16:30) (4/S-030)
14:00 Introduction & Goal of the Discussion  
14:30 Discussion: SRF  
15:00 Discussion: CLIC, C3  
15:30 Discussion: Wakefield Accelerators  
15:00
Main linac technologies - SRF & CLIC & HL-RF & … - Walter Wuensch (CERN) Marc Wenskat (until 16:30) (53/R-044)
16:30 --- Coffee Break ---
17:00
Plenary: intermediate working group reports (until 18:00)
12:00 --- Lunch ---
13:00
Plenary (until 16:01)
13:00 WG report: AD&I accelerator design and parameters - Dr Benno List (Deutsches Elektronen-Synchrotron (DE)) Erik Adli (University of Oslo (NO))  
13:15 WG report: Main linac technologies - SRF & CLIC & HL-RF - Marc Wenskat Walter Wuensch (CERN)  
13:30 WG report: Beam Delivery Systems, Extraction Lines & IR design - Dr Angeles Faus-Golfe (IJClab IN2P3 CNRS-Université Paris-Saclay (FR)) Rogelio Tomas Garcia (CERN)  
13:45 WG report: Upgrade options - Marlene Turner (CERN) Emilio Nanni (Unknown) Emilio Alessandro Nanni  
14:00 Minute of silence for Crans-Montana  
14:01 WG report: CFS conventional facilities & siting - John Andrew Osborne (CERN) Edward Fraser MacTavish (CERN)  
14:11 WG report: Positron source - Gudrid Moortgat-Pick Steffen Doebert (CERN)  
14:21 WG report: Detector - Frank-Dieter Gaede (Deutsches Elektronen-Synchrotron (DE)) Roman Poeschl (Université Paris-Saclay (FR)) Aidan Robson (University of Glasgow (GB))  
14:31 WG report: Sharpening the physics case - Dr Junping Tian (The University of Tokyo) Juergen Reuter (DESY Hamburg, Germany) Graham Wilson (The University of Kansas (US))  
14:46 WG report: Beyond colliders - Ivo Schulthess (ETH Zurich) Patrick Koppenburg (Nikhef National institute for subatomic physics (NL))  
14:56 Community organisation, way forward  
16:10
Executive session (closed) (until 18:10)