ALEGRO2023 Workshop
DESY Lecture Hall
DESY
This workshop is the fourth in the ALEGRO workshop series. Previous workshops: ANAR2017 CERN, ALEGRO2018 Oxford, ALEGRO 2019 CERN
After a four-year hiatus the ALEGRO (Advanced LinEar collider study GROup) Workshop is returning. As in past iterations, the workshop will concentrate on addressing the recent progress and necessary steps towards realising a linear collider for particle physics based on novel-accelerator technology. Unique to this iteration will be two special sessions dedicated to updates on the relevant aspects of the European Strategy for Particle Physics (ESPP) Roadmap Process.
It will be held at the DESY campus from March 22 to 24, 2023.
This workshop is endorsed by the International Committee for Future Accelerators.

The registration fees per person including coffee breaks and workshop dinners are
- Standard 145 Euro
- Students/PHDs 50 Euro
Registration now open UNTIL MARCH, 10TH 2023 - PLEASE NOTE EXTENDED REGISTRATION DEADLINE!
Both registration and abstract submission will be handled via a CERN indico page. For the registration a CERN account is required.
In case you do not have a CERN account you can open one using the following link:
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08:30
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09:00
Registration 30m DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
09:00
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10:45
Introduction DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 HamburgConvener: Richard D'Arcy-
09:00
Opening words 15mSpeakers: Ties Behnke, Wim Leemans (DESY)
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Coffee break 30m DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
11:15
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13:00
Mid-term particle physics application and science case (10-100 GeV): Part 1 DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 HamburgConvener: Brian Foster (University of Oxford (GB))- 11:15
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12:25
Particle Physics Applications with AWAKE Technology 35mSpeaker: Allen Caldwell (Max-Planck-Institut fur Physik (DE))
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Lunch Break 1h DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
14:00
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15:30
How to build a mid-term facility (10-100 GeV): Part 1 DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 HamburgFor first particle physics applications and potentially, as a basis for a future collider test facility
Convener: Jens Osterhoff-
14:00
Simulation challenges for a multi-stage plasma accelerator 45mSpeaker: Jean-Luc Vay (Lawrence Berkeley National Laboratory)
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14:45
Staging and temporal tolerances 45mSpeaker: Dr Carl A. Lindstrøm (DESY)
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Tea Break and Group Photo 30m DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
16:00
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17:00
How to build a mid-term facility (10-100 GeV): Part 2 DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 HamburgFor first particle physics applications and potentially, as a basis for a future collider test facility
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16:00
Transverse-tolerance challenges at conventional and novel accelerators 45mSpeaker: Glen White (SLAC)
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Poster session and drinks DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
19:00
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21:30
Workshop Dinner at Canteen Extension Bldg. 09a 2h 30m
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10:45
ESPP Roadmap Process DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg-
09:00
Coordination: Plasma Accelerators for Particle Physics 15mSpeakers: Rajeev Pattathil, Wim Leemans (DESY)
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09:15
Overall collider concepts (Higgs factory, multi-TeV) 10mSpeakers: Dr Carl A. Lindstrøm (DESY), Carl Schroeder, Zulfikar Najmudin (Imperial College)
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09:25
Beam-driven electron linac 10mSpeaker: Erik Adli (University of Oslo (NO))
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09:35
Laser-driven electron linac 10mSpeakers: Brigitte Cros, Jorge Viera (IST), Maxence Thevenet (Lawrence Berkeley National Laboratory)
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09:45
Positron arm / Spin and polarisation preservation / Final-focus system 15m
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Sustainability analysis 10mSpeaker: Denise Völker
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10:10
Discussion 35m
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Coffee break 30m DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
11:15
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13:00
ESPP Roadmap Process DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg-
11:15
High-rep.-rate plasma-accelerator module: 10 yr vision 10mSpeakers: Andreas Maier (Universität Hamburg), Leonida Gizzi (CNR)
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11:25
High-rep.-rate laser-driver development 10mSpeakers: Andreas Maier (Universität Hamburg), Paul Mason
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11:35
High-rep.-rate plasma targets 10mSpeakers: Brigitte Cros, Simon Hooker (University of Oxford)
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11:45
Facility/Delivery requirements 10mSpeakers: Dr Andreas Döpp (University of Munich (LMU)), Daniel Symes (STFC Rutherford Appleton Laboratory)
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11:55
High-efficiency, beam-quality-preserving electron-driven plasma module: 10 yr vision 10mSpeakers: Jens Osterhoff, Richard D'Arcy (DESY)
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12:05
Proton-driven experiments at AWAKE 10mSpeakers: Edda Gschwendtner (CERN), Patric Muggli (Max Planck Institute for Physics)
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12:15
Early particle physics experiments and test facilities 10mSpeakers: Brian Foster (University of Oxford (GB)), Maria Vranic, Matt Zepf (Helmholtz Institut Jena), Stuart Mangles
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12:25
Discussion - next steps 35m
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Lunch Break 1h DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
14:00
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16:00
Outstanding challenges: positron acceleration in plasma, emittance preservation at a level relevant for collider applications, competitive efficiency, repetition rate/average power: Part 1 DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 HamburgConvener: Mark Hogan-
14:00
High-rep.-rate laser drivers and plasma sources 30mSpeaker: Dr Laura Corner (Cockcroft Institute, University of Liverpool)
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14:30
High-rep.-rate beam drivers and plasma sources 30mSpeaker: Richard D'Arcy (DESY)
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15:00
Competitive efficiency: what’s achieved and what’s required (LWFA & PWFA) 30mSpeaker: Erik Adli (University of Oslo (NO))
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15:30
‘Efficiency vs. Stability’ in novel and conventional accelerators 30mSpeaker: Sergey Antipov
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16:30
Tea Break 30m DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
16:30
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18:00
Outstanding challenges: positron acceleration in plasma, emittance preservation at a level relevant for collider applications, competitive efficiency, repetition rate/average power: Part 2 DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 HamburgConvener: Mark Hogan-
16:30
Positron acceleration: a systematic overview 30mSpeaker: Mr Severin Diederichs (DESY)
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17:00
Hybrid Asymmetric Linear Higgs Factory (HALHF) 30mSpeaker: Brian Foster (University of Oxford (GB))
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17:30
Emittance preservation and required tolerances 30mSpeaker: Maxence Thevenet (Lawrence Berkeley National Laboratory)
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21:00
Workshop Dinner and Reception at Canteen Extension Bldg. 09a 2h 30m
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10:45
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Study: what aspects of a HeP collider do all the non-directly related ANAS or ANAs experiments contribute to? DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 HamburgConvener: Brigitte Cros-
09:00
Laser drivers for plasma accelerators 50m
State-of-the-art and its relevance to collider development,
Speaker: Leonida Gizzi (CNR) -
09:50
Simulation tools and performance for accelerator modeling 50m
State-of-the-art and its relevance to collider development, including discussion
Speaker: Jorge Viera (IST)
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11:15
Coffee break 30m DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
11:15
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12:45
Getting organized: global design, pre-CDR/feasibility DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg -
12:45
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13:00
Closing DESY Lecture Hall
DESY Lecture Hall
DESY
DESY Lecture Hall c/o Deutsches Elektronen-Synchrotron DESY Notkestraße 85, Building 05 D-22607 Hamburg
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09:00
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10:45