ALEGRO 2025 Workshop

4 Mar 2025, 08:00 → 6 Mar 2025, 17:30 America/Los_Angeles

51/1-102 - Kavli Auditorium (SLAC)

Brigitte Cros (Universite Paris Saclay), Patric Muggli (Max-Planck-Institut für Physik), Spencer Gessner (SLAC)

Advanced Linear Collider Study Group 2025 Workshop 

The ALEGRO (Advanced LinEar collider study GROup) Workshop will concentrate on addressing the recent progress and necessary steps towards realizing a linear collider for particle physics based on novel-accelerator technology. The Workshop will engage HEP Theorists and Experimentalists on the question of the physics reach of a 10 TeV Wakefield Collider. The Workshop will feature plenary sessions organized around the "Grand Challenges" of Wakefield Collider design. Afternoons will be dedicated to discussion sessions organized around the 10 TeV Wakefield Collider Design Study Working Groups. There will be a session to review and comment on the input to the European Strategy for Particle Physics (ESPP) Roadmap Process.

Grand Challenges

The design of a 10 TeV Wakefield Collider involves many challenges, but some stand out:

1. Full acceleration of beams with charge > 100 pc and emittance < 100 nm.
2. Emittance preservation and stability of staged plasma acceleration.
3. Acceleration of positrons in plasma.
4. Beam Delivery Systems for 5 TeV beams.
5. Mitigation of beam-beam effects at 10 TeV CM.

ALEGRO_2025_11X17_Poster.pdf

Tuesday 4 March

08:30 → 09:30 Introduction

Convener: Spencer Gessner (SLAC)

08:30 Lab Welcome

Speaker: Mark Hogan (SLAC)

ALEGRO2025 Welcome.pdf

08:40 Workshop Information

Speakers: Brigitte Cros (Universite Paris Saclay), Patric Muggli (Max-Planck-Institut für Physik), Spencer Gessner (SLAC)

ALEGRO_AGENDA.pptx.pdf

alegro_intro.pdf

09:00 Snowmass, P5, and the 10 TeV Wakefield Design Study

Speaker: Cameron Geddes (LBNL)

2025_0304 Snowmass, P5, and the 10 TeV Wakefield Design Study Geddes.pdf

09:30 → 10:00 Coffee

10:00 → 11:00 Collider Grand Challenges

Convener: Jens Osterhoff (Lawrence Berkeley National Laboratory)

Notes document

10:00 Physics at 10 TeV Wakefield Colliders

Speaker: Simon Knapen (Lawrence Berkeley National Lab)

ALEGRO_2025.pdf

10:30 Detectors for 10 TeV Wakefield Colliders

Speaker: Nicole Hartman (SLAC)

Hartman-detectors-ALEGRO-builds.pdf

11:00 → 12:00 Collider Grand Challenges

Convener: Jens Osterhoff (Lawrence Berkeley National Laboratory)

Notes document

11:00 Beam-Beam Interactions at 10 TeV Wakefield Colliders

Speaker: Thomas Grismayer (IST Lisbon)

Grismayer_Alegro_2025.pdf

11:30 Sources of emittance growth for 10 TeV Wakefield Colliders

Speaker: Tor Raubenheimer (SLAC)

250301 Emittance Dilution for AAC.pptx

12:00 → 12:30 Group Photo

12:30 → 14:00 Lunch

14:00 → 15:30 Working Group: Beam-Beam + MDI+ Detector + Physics, Topic: Physics with primary + beamstrahlung interactions

Conveners: Simon Knapen (Lawrence Berkeley National Lab), Spencer Gessner (SLAC), Thomas Grismayer (IST Lisbon)

14:00 Improved analytic methods for modeling beamstrahlung

Speaker: Michael Peskin (SLAC)

Beamstrahlung at High Energy.pdf

14:00 → 15:30 Working Group: LWFA + PWFA + Laser Driver + Sims, Topic: LWFA staging

Conveners: Almantas Galvanauskas (University of Michigan), Dr Francesco Massimo (LPGP - CNRS - Université Paris Saclay), Leily Kiani (Lawrence Livermore National Laboratory), carlo benedetti (LBNL)

CERN-THESIS-2018-223.pdf

Discussion: BDS and MDI Workflow

14:00 LWFA Staging Discussion Points

Speaker: Dr Francesco Massimo (LPGP - CNRS - Université Paris Saclay)

ALEGRO_04_03_2025_WG_session.pdf

14:00 → 15:30 Working Group: SWFA + Beam Drivers, Topic: SWFA drivers and linac

Conveners: John Power (Argonne National Laboratory), Xueying Lu (Northern Illinois University & Argonne National Laboratory)

SWFA Discussion Document

14:00 → 15:30 Working Group: Sources, Topic: Source brightness

Conveners: Joe Grames, Oksana Chubenko (NIU), Siddharth Karkare (Arizona State University)

14:00 Status of the CYBORG beamline at UCLA: Cryo-RF Photoinjectors for High Brightness Electron Beams

Speaker: Fabio Bosco (UCLA)

2025-03-04 - ALEGRO Workshop - F. Bosco.potx.pptx

15:30 → 16:00 Coffee

16:00 → 17:30 Working Group: Beam-beam + Sims, Topic: Beam-Beam simulation tasks

Conveners: Arianna Formenti (LBNL), Thomas Grismayer (IST Lisbon)

SWFA Discussion Document

16:00 → 17:30 Working Group: LWFA + PWFA + Sources + Drivers + Sims, Topic: Comparing electron and proton drivers

Conveners: Alexander Knetsch (SLAC), Doug Storey (SLAC), Livio Verra (INFN)

CERN-THESIS-2018-223.pdf

Discussion: BDS and MDI Workflow

16:00 Discussion: Comparing Electron and Proton Drivers

Speaker: Doug Storey (SLAC)

Discussion: Comparing Electron and Proton Drivers

16:15 ALIVE Proton Beam-Driven Plasma Collider

Speaker: John Farmer (Max-Planck Insitute for Physics)

Farmer_ALEGRO.pdf

16:00 → 17:30 Working Group: Physics + Detector, Topic: Physics Benchmarks discussion

Conveners: Nicole Hartman (SLAC), Simon Knapen (Lawrence Berkeley National Lab)

16:00 Colorful particle production at a high energy muon collider

Speaker: Arthur Wu (Pitt)

16:15 Measuring the triple Higgs coupling a 10 TeV wakefield collider

Speaker: Kevin Langhoff

Kevin's_ALLEGRO_Talk.pdf

16:30 Searching for new particles at a 10 TeV wakefield collider

Speaker: So Chigusa

18:00 → 19:30 Welcome Reception

Wednesday 5 March

08:55 → 09:00 Introduction

08:55 Agenda

Speaker: Spencer Gessner (SLAC)

Agenda Updates

09:00 → 09:30 Collider Grand Challenges

Convener: Patric Muggli (Max Planck Institute for Physics)

Notes document

09:00 Beam Delivery System for 10 TeV Colliders

Speaker: Vera Cilento (CERN)

Alegro25._BDS.pdf

09:30 → 10:00 Plenary: EuPRAXIA

09:30 EuPRAXIA: A plasma acceleration-based user facility

Speaker: Pierluigi Campana (INFN)

EuPRAXIA ALEGRO 20250306.pdf

10:00 → 10:30 Coffee

10:30 → 12:30 Wakefield Accelerator Technology

Convener: Brigitte Cros (Universite Paris Saclay)

10:30 Challenges in SWFA for 10 TeV Wakefield Colliders

Speaker: Xueying Lu (SLAC)

ALEGRO25_Lu_20250305.pptx

11:00 Challenges in PWFA staging for 10 TeV Wakefield Colliders

Speaker: Livio Verra (INFN)

ALEGRO_staging_livio.pdf

11:30 Challenges in LWFA staging for 10 TeV Wakefield Colliders

Speaker: Francesco Massimo (Universite Paris Saclay)

FMassimo_ALEGRO_05_03_2025.pdf

12:00 Challenges in Proton Beam-Driven Plasma Acceleration for 10 TeV Colliders

Speaker: Ferdinand Willeke (BNL)

Challenges in Proton Beam-Driven Plasma Acceleration for 10 TeV colliders_vs0.pdf

12:30 → 14:00 Lunch

14:00 → 15:30 Working Group: BDS + MDI, Topic: BDS and MDI workflow

Conveners: Nicole Hartman (SLAC), Vera Cilento (CERN)

CERN-THESIS-2018-223.pdf

Discussion: BDS and MDI Workflow

14:00 → 15:30 Working Group: LWFA + Laser Driver, Topic: Laser Driver Technology

Conveners: Almantas Galvanauskas (University of Michigan), Leily Kiani (Lawrence Livermore National Laboratory)

14:00 → 15:30 Working Group: PWFA + Beam Drivers, Topic: Staging and Beam drivers for PWFA linac

Conveners: Alexander Knetsch (SLAC), Doug Storey (SLAC), Livio Verra (INFN)

SWFA Discussion Document

15:30 → 16:00 Coffee

16:00 → 17:30 Working Group: BDS + MDI + Beam-Beam + Detector, Topic: Gamma - Gamma collider

Conveners: Jens Osterhoff (Lawrence Berkeley National Laboratory), Timothy Barklow (SLAC)

16:00 Basic physics considerations for a gamma/gamma collider

Speaker: Simon Knapen (Lawrence Berkeley National Lab)

16:20 Gamma Gamma Colliders

Speaker: Timothy Barklow (SLAC)

PWFA_gg_Colliders_Barklow_05Mar2025.pdf

PWFA_gg_Colliders_Barklow_05Mar2025.pptx

16:00 → 17:30 Working Group: Integration, Topic: Global optimization framework

Conveners: Brigitte Cros (Universite Paris Saclay), Carl Schroeder (LBNL)

CERN-THESIS-2018-223.pdf

Discussion: BDS and MDI Workflow

16:00 Global Collider Optimization

Speaker: Carl A. Lindstrøm (University of Oslo)

Global collider optimization (Lindstrøm, ALEGRO, 5 Mar 2025).pdf

16:00 → 17:30 Working Group: LWFA + PWFA + Sims, Topic: Simulations for very high energy stages

Convener: Alexander Knetsch (SLAC)

SWFA Discussion Document

16:00 Modeling betatron radiation for very high energy stages

Speaker: Daniel Kalvik (University of Oslo)

Betatron_radiation_ALEGRO_kalvik.pdf

Betatron_radiation_ALEGRO_kalvik.pptx

16:15 High Energy Modeling Discussion Points

Speaker: Alexander Knetsch (SLAC)

High Energy Modeling Discussion Points

16:30 Data driven plasma accelerator modeling

Speaker: Axel Huebl (Lawrence Berkeley National Laboratory)

Data-Driven Modeling for Wakefield Colliders

18:30 → 20:30 Conference Dinner

Thursday 6 March

08:55 → 09:00 Introduction

Convener: Spencer Gessner (SLAC)

08:55 Agenda

Speaker: Spencer Gessner (SLAC)

Agenda

09:00 → 09:30 Collider Grand Challenges

Notes document

09:00 Plasma acceleration challenges for flat beams and positron beams

Speaker: Carlo Benedetti (LBNL)

Benedetti_ALEGRO2025.ppt

09:30 → 10:30 Plenary: Red team/ Blue team

Convener: Cameron Geddes (LBNL)

Red Team/Blue Team

10:30 → 11:00 Coffee

11:00 → 12:30 Working Group: BDS + Beam-Beam, Topic: BDS Challenges at 10 TeV

Conveners: Thomas Grismayer (IST Lisbon), Vera Cilento (CERN)

11:00 → 12:30 Working Group: Beam drivers + Particle sources, Topic: Drivers and Sources

Conveners: John Power (Argonne National Laboratory), Siddharth Karkare (Arizona State University)

11:00 → 12:30 Working Group: Detector + MDI, Topic: Detector Tasks and Strategy

Conveners: Nicole Hartman (SLAC), Simone Pagan Griso (LBNL)

SWFA Discussion Document

11:00 → 12:30 Working Group: PWFA/LWFA, Topic: Positron acceleration

Conveners: Spencer Gessner (SLAC), carlo benedetti (LBNL)

CERN-THESIS-2018-223.pdf

Discussion: BDS and MDI Workflow

12:30 → 14:00 Lunch

14:00 → 15:30 Summary of Working Groups

Convener: Jens Osterhoff (Lawrence Berkeley National Laboratory)

WG Summaries

15:30 → 16:00 Coffee

16:00 → 17:30 Discussion of the ESPP Input document

Convener: Spencer Gessner (SLAC)