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15th HL-LHC Collaboration Meeting, CERN, 29 September - 2 October 2025

from Monday 29 September 2025 (08:00) to Friday 3 October 2025 (17:30)


        : Sessions
    /     : Talks
        : Breaks
29 Sept 2025
30 Sept 2025
1 Oct 2025
2 Oct 2025
3 Oct 2025
AM
08:00 Registration at the Science Gateway   (81/S-006)
09:00
Plenary session 1 - Monday AM - Mike Lamont (CERN) (until 10:20) (81/R-003 Science Gateway Auditorium BC)
09:00 Welcome - Fabiola Gianotti (CERN)  
09:05 Welcome - Mark Thomson (CERN)  
09:10 HL-LHC Project status - Oliver Bruning (CERN)  
09:40 Status of US-AUP contribution - Giorgio Apollinari (Fermi National Accelerator Lab. (US))  
10:00 Status of LQXFA cryostating and schedule to finish LQXFA10 - Sandor Feher (Fermi National Accelerator Lab. (US))  
10:20 --- Group picture (Science Gateway Piazza) and Coffee break ---
10:50
Plenary session 2 - Monday AM - Oliver Bruning (CERN) (until 12:30) (81/R-003 Science Gateway Auditorium BC)
10:50 Status of D1 and HPRF - Tatsushi Nakamoto (KEK)  
11:05 MCBXF coil production and assembly - Fernando Toral (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))  
11:25 Status of D2 corrector magnets (MCBRD) - Rui Kang (Institute of High Energy Physics, CAS)  
11:40 Status of WP3 Magnets for Insertion Regions (including MQXFB) - Susana Izquierdo Bermudez (CERN)  
12:15 Status of D2 - Stefania Farinon (INFN e Universita Genova (IT))  
08:30
Collaboration Board (restricted) (until 11:00)
08:30
Guided visit to IT String (SM18, FR) and HL-LHC Point1 (CH) (until 11:00)
11:00 --- Coffee break ---
11:30
Plenary session 1 - Tuesday AM - Said Atieh (CERN) (until 13:00) (81/R-003 Science Gateway Auditorium BC)
11:30 WP9 HL-LHC Cryogenics: status of production and installation - Vanessa Gahier (CERN)  
11:50 WP6A Cold Powering - Amalia Ballarino (CERN)  
12:20 WP6B Warm Powering - Michele Martino (CERN)  
12:40 WP7 Machine Protection & Availability - Daniel Wollmann (CERN)  
08:30
Wednesday AM - WP13 - Stephen Gibson (Royal Holloway, University of London) (until 10:30) (6/R-012 - conference room)
08:30 EO BPM tests in the SPS - Daniel Mark Harryman (University of London (GB))  
08:50 EO modulator read-out at LHC for HT monitoring - Andreas Schloegelhofer  
09:10 BSRT: overview and strategy - Federico Roncarolo (CERN)  
09:30 BGI: plans for the HL baseline - James Storey (CERN)  
09:50 BGI: DAQ and expected performance - Hampus Sandberg (CERN)  
10:10 BGC: LHC tests and status - Daniele Butti  
08:30
Wednesday AM - WP2/OP - Nicolas Mounet (CERN) (until 10:30) (31/3-004 - IT Amphitheatre)
08:30 Run3 observations as input for Run4 commissioning - Daniele Mirarchi (CERN)  
08:50 Enhancing luminosity with beam-beam beta-beating and LHC experience - Joanna Wanczyk  
09:10 The challenge of low beta* - Ewen Hamish Maclean (CERN)  
09:30 Using the IT corrector package for long range beam-beam mitigation - Sasha Jade Horney (University of Oxford (GB))  
09:50 Transverse impedance updates - Chiara Antuono  
10:10 Latest plans for the high-intensity tests - Matteo Solfaroli Camillocci (CERN)  
08:30
Wednesday AM - WP3/WP6A/WP7/WP16/MCF - Samer Yammine (CERN) (until 10:50) (30/7-018 - Kjell Johnsen Auditorium)
08:30 Quench detection and temperature gradient settings – From standalone test benches to IT String - Franco Julio Mangiarotti (CERN)  
08:50 Quench Detection System for HL-LHC - Progress and first experience from the IT String IST - Jens Steckert (CERN)  
09:10 UQDS functional testing prior to installation - Magnus Christensen  
09:30 From String to Operation: string controls for operational cycle tests - Michi Hostettler (CERN)  
09:50 Current lead heater system for the DFHX current leads - Experience from the IT String IST - Giorgio D'Angelo (CERN)  
10:10 EDAQ - Implementation in the IT String and first experience - Tomasz Podzorny (CERN)  
10:30 Controls integration of the new protection systems for HL-LHC - Marc-Antoine Galilee (CERN)  
08:30
Wednesday AM - WP4 - Ofelia Capatina (CERN) (until 10:30) (6/2-024 - BE Auditorium Meyrin)
08:30 RFD industrial production & challenges - Manuele Narduzzi  
08:50 DQW industrial production challenges - Nuria Valverde Alonso (CERN)  
09:10 RFD pre-series and series cavity testing - Subashini De Silva (Old Dominion University (US))  
09:30 DQW series cavity testing - Katarzyna Turaj (CERN)  
09:50 Dressed cavity testing experience at TRIUMF and outlook - Zhongyuan Yao (TRIUMF) Zhongyuan Yao (TRIUMF)  
10:10 Discussion  
08:30
Wednesday AM - WP8/WP12/WP10/WP19 - Vincent Baglin (CERN) (until 10:30) (30/7-010)
08:30 Reducing the dose to the VAX equipment - Francesco Cerutti (CERN)  
09:00 Mock-up and Q1-TAXS, VAX, GIS line integration - Oliver Boettcher (CERN)  
09:30 TAXS & VAXBOX production & installation - Antonio Alonso (CERN)  
10:00 Q1-TAXS, VAX, GIS line, forward chamber production - Jaime Perez Espinos (CERN)  
10:30 --- Coffee break - WP2/WP5/WP7/WP10/WP13/OP ---
10:30 --- Coffee break - WP3/WP6A/WP7/WP8/WP10/WP12/WP16/WP19 ---
10:30 --- Coffee break - WP4 & WP13 ---
11:00
Wednesday AM - WP13 - Stephen Gibson (Royal Holloway, University of London) (until 12:30) (6/R-012 - conference room)
11:00 BGC for electron beam - Hao Zhang (University of Liverpool/Cockcroft Institute)  
11:20 Status of the BLM IC production - Gerhard Schneider (CERN)  
11:40 BLM system – production, and installation plans - Christos Zamantzas (CERN)  
12:00 BPM acquisition chain – overview and status - Irene Degl'Innocenti (CERN)  
12:15 Warm BPMs design status and production plans - Loann Havart (Universite de Technologie de Belfort Montbeliard (FR))  
11:00
Wednesday AM - WP2/WP5/WP7/WP10/WP13 - Nicolas Mounet (CERN) (until 12:50) (31/3-004 - IT Amphitheatre)
11:00 DA and luminosity for round and flat optics - Sofia Kostoglou (CERN)  
11:20 Feedback from high-intensity tests on the new IR7 optics - Ludovica Bertolozzi (Politecnico di Milano (IT)) Bjorn Hans Filip Lindstrom (University of London (GB))  
11:40 Updates on the CLIQ & CC failure case studies - Christophe Lannoy (CERN)  
12:00 Halo models and options for active depletion - Milica Rakic (EPFL - Ecole Polytechnique Federale Lausanne (CH))  
12:15 Halo population in HL-LHC: Status and open questions - Pascal Hermes (CERN)  
12:30 Halo monitoring - status and expected performance - Jan Pucek (SY-BI-PM)  
11:00
Wednesday AM - WP4 - Rama Calaga (CERN) (until 12:35) (6/2-024 - BE Auditorium Meyrin)
11:00 RFD horizontal HOM couplers: Fabrication and outlook - Naeem Huque Naeem Abdul Huque  
11:20 CERN RFD cavity fabrication & HOM status - Simon Barrière (CERN)  
11:35 RF power for crab cavities and challenges - Gino Cipolla (CERN)  
11:50 LLRF status and update - Gregoire Hagmann (CERN)  
12:00 RF slows controls, interlocks & software (architecture, status, planning) - Michael Jaussi (CERN)  
12:15 High efficiency klystrons for LHC-RF status and outlook - Chiara Marrelli (CERN)  
11:00
Wednesday AM - WP8/WP12/WP10/WP19 - Francisco Sanchez Galan (CERN) (until 12:20) (30/7-010)
11:00 Remote manipulation of VAX modules - Sergio Di Giovannantonio (CERN)  
11:20 TAXS & VAX survey and alignment – Current status and updates - Solomon William Kamugasa (CERN)  
11:40 Q1-TAXS, VAX, GIS line, forward chamber installation, WDP and planning - Josef Sestak (CERN)  
12:00 ATLAS and CMS opening, closing and YETS scenario - Alessio Galloro (CERN)  
11:10
Wednesday AM - WP16/WP19/WP3/MCF Lessons learned on the latest IT String Non Conformity - Marta Bajko (CERN) (until 12:50) (30/7-018 - Kjell Johnsen Auditorium)
11:10 Leak detection on the IT String - Jose Antonio Ferreira Somoza (CERN)  
11:30 N line pulling- root cause of the NC and the IT String and repair options - Lucie Baudin (CERN)  
11:50 Specification of the HL-LHC BB - SVP after repair - Samer Yammine (CERN)  
12:10 FRAS for measurements and for diagnostics - Vincent Thomas Barbarroux (CERN)  
12:30 IT String NC: Impact on the HL-LHC BB design - Susana Izquierdo Bermudez (CERN)  
08:30
Thursday AM - WP2/WP4/WP5 - Rama Calaga (CERN) (until 10:30) (31/3-004 - IT Amphitheatre)
08:30 Electron cloud observations and impact for HL-LHC - Lotta Mether (CERN)  
08:50 InterTrain cleaning / Losses at adjust - Xavier Buffat (CERN)  
09:10 LHC RF power studies, MDs and outlook - Helga Timko (CERN)  
09:30 HL-LHC longitudinal beam stability for updated impedance model - Ivan Karpov (CERN)  
09:50 Feedback from Run 3 on collimation losses: Impact of optics errors and beam–beam effects - Frederik Van Der Veken (CERN)  
10:10 High-intensity MD results and impact on luminosity - Sofia Kostoglou (CERN)  
08:30
Thursday AM - WP3/WP12/WP13 - Lucie Baudin (CERN) (until 10:30) (30/7-018 - Kjell Johnsen Auditorium)
08:30 Cold mass at CERN - Herve Prin (CERN)  
09:00 Cryostating at CERN - Delio Ramos (CERN)  
09:30 Cryo-BPMs: production progress - Emma Elizabeth Quinn  
10:00 Update on the HL-LHC beam screen production and integration - Cedric Garion (CERN)  
10:30 --- Coffee break - WP2/WP4/WP5/WP13 ---
10:30 --- Coffee break- WP2/WP3/WP5/WP7/WP14 ---
11:00
Steering Committee with INFN (restricted) - Markus Zerlauth (CERN) (until 12:00) (30/6-019)
11:00
Thursday AM - WP2/WP4/WP13 - Xavier Buffat (CERN) (until 12:30) (31/3-004 - IT Amphitheatre)
11:00 SPS crab cavity MDs with RF dipole cryomodule - Rama Calaga (CERN)  
11:15 First crabbing observation via head-on beam-beam interaction - Andrea Fornara  
11:25 HOM measurements from series cavities and RF lines - Amelia Veronica Edwards (Lancaster University)  
11:40 Crab cavity impedance: SPS MDs and HOMs - Chiara Antuono  
11:55 Is crab cavity noise feedback feasible? - Daniel Valuch (CERN)  
12:05 Crabbing measurement resolution achieved in SPS - Wolfgang Hofle (CERN)  
12:15 HL-LHC Crab Cavity BPMs status and outlook - Michal Krupa (CERN)  
11:00
Thursday AM - WP5/WP7/WP14 - Anton Lechner (CERN) (until 12:50) (30/7-010)
11:00 Damage experiment with radiation aged coils - Delphine Domange (Universite Libre de Bruxelles (BE))  
11:20 Energy deposition studies for the HL-LHC beam dump - Helene Guerin  
11:40 Towards the final HL-LHC beam dump design - Asbjoern Lund  
12:00 Simulations of ring losses for fast failures - Andre Donadon Servelle (CERN)  
12:20 Evaluation of thermal contact conductance in HL-LHC collimator jaws: Experimental tests and multiphysics simulations - Luisa Puddu (CERN)  
12:35 Vibrational simulations and experimental measurements on HL-LHC collimator jaws - Laura Helene Hannemann (CERN)  
08:30
Guided visit to IT String (SM18, FR) and HL-LHC Point1 (CH) (until 11:00)
08:30
Steering Committee with IHEP (restricted) - Markus Zerlauth (CERN) (until 09:30) (30/6-019)
09:30
Steering Committee with CIEMAT (restricted) - Markus Zerlauth (CERN) (until 10:30) (30/6-019)
10:30 --- Coffee break ---
PM
12:30 --- Lunch break ---
14:00
Plenary session 1 - Monday PM - Philip Nicholas Burrows (University of Oxford (GB)) (until 15:30) (81/R-003 Science Gateway Auditorium BC)
14:00 Status of WP4 crab cavities - Ofelia Capatina (CERN)  
14:30 UK contribution: Status of DQW cryomodules - Niklas Templeton Niklas John Templeton (STFC Daresbury Laboratory (GB))  
14:50 RFD Crab Cavity contribution from the U.S. - Status, issues and delivery dates - Manuele Narduzzi  
15:10 Canadian contribution: Status of RFD cryomodules - Robert Laxdal  
15:30 --- Coffee break ---
16:00
Plenary session 2 - Monday PM - Markus Zerlauth (CERN) (until 17:40) (81/R-003 Science Gateway Auditorium BC)
16:00 WP2 Accelerator Physics: Performance of the HL-LHC, from baseline to alternative options - Rogelio Tomas Garcia (CERN)  
16:20 WP5 Collimation - Update on beam collimation performance at the HL-LHC - Stefano Redaelli (CERN)  
16:40 WP16 IT String - Marta Bajko (CERN)  
17:10 HL-LHC project: schedule considerations - Paolo Fessia (CERN)  
18:00 --- Welcome drink ---
13:00 --- Lunch break ---
14:30
Plenary session 1 - Tuesday PM - Roberto Losito (CERN) (until 16:00) (81/R-003 Science Gateway Auditorium BC)
14:30 WP12 Vacuum & Beam Screen - Vincent Baglin (CERN)  
14:50 WP8 Collider-Experiment Interface - Francisco Sanchez Galan (CERN)  
15:05 WP10 Energy Deposition & R2E: Overview of energy deposition and radiation levels at the HL-LHC - Giuseppe Lerner (CERN)  
15:20 WP13 Beam Instrumentation - Raymond Veness (CERN)  
15:40 WP14 Beam Transfer & Kickers - Chiara Bracco (CERN)  
16:00 --- Coffee break ---
16:30
Plenary session 2 - Tuesday PM - Malika Meddahi (CERN) (until 17:30) (81/R-003 Science Gateway Auditorium BC)
16:30 WP17 Infrastructure, Logistics & Civil Engineering - Silvia Grau (CERN) Henry De Maynard (CERN)  
16:50 WP18 Controls Technologies - Javier Serrano (CERN)  
17:10 WP19 Alignment & Internal Metrology: FRAS at SCT and IT String – status of sensor & adjustment system qualification and software preparation - Mateusz Sosin (CERN)  
18:45 --- Transfer from/to CERN and HLCB Dinner (by invitation) ---
12:30 --- Lunch break ---
14:00
Guided visit to IT String (SM18, FR) and HL-LHC Point1 (CH) (until 16:30)
14:00
Wednesday PM - WP2/OP - Matteo Solfaroli Camillocci (CERN) (until 15:20) (31/3-004 - IT Amphitheatre)
14:00 Optics baseline status and status of the LHC arc errors - Yannis Angelis (Aristotle University of Thessaloniki (GR))  
14:20 Beam energy discrepancy: What can the optics mismatch reveal? - Joshua Mark Gray (Nikhef National institute for subatomic physics (NL))  
14:40 Coupled-bunch instability modeling - Xavier Buffat (CERN)  
15:00 Run 5 optics challenges - Kyriacos Skoufaris (CERN)  
14:00
Wednesday PM - WP3 - Ezio Todesco (CERN) (until 15:40) (30/7-018 - Kjell Johnsen Auditorium)
14:00 Overview on WP3 cold powering test - Gerard Willering (CERN)  
14:20 WP3 vertical testing - Vincenzo Di Capua (CERN)  
14:40 MQXFA vertical test at BNL - Piyush Joshi  
15:00 Q1/Q3 tests at FNAL - Guram Chlachidze  
15:20 Q1/Q2/Q3 test at CERN - Franco Julio Mangiarotti (CERN)  
14:00
Wednesday PM - WP4 - Robert Laxdal (until 16:00) (6/2-024 - BE Auditorium Meyrin)
14:00 CM lessons learned SPS and CERN series - Teddy Capelli (CERN)  
14:20 Alignment - Vivien Rude (CERN)  
14:30 Vacuum - Giuseppe Bregliozzi (CERN)  
14:40 Cryogenics for crab cavities, design to realization - Krzysztof Brodzinski (CERN)  
15:00 CRAB Mechanical measurements overview and next steps - Michael Guinchard (CERN)  
15:20 UK cryomodules build qualification and alignment strategy - Mr Edward Stephen Jordan (STFC Daresbury Laboratory (GB)) Edward Jordan (Unknown)  
15:40 First North American OVC and lessons learned - Oliver Law (TRIUMF)  
15:40 --- Coffee break - WP3 ---
16:00 --- Coffee break - WP2/WP5/WP6B/WP10 ---
16:00 --- Coffee break - WP4 ---
16:10
Wednesday PM - WP3 - Ezio Todesco (CERN) (until 17:00) (30/7-018 - Kjell Johnsen Auditorium)
16:10 MQXFB coils and magnets - Susana Izquierdo Bermudez (CERN)  
16:30 MQXFA coils and magnets - Giorgio Ambrosio (Fermilab)  
16:50 AUP cold mass and cryoassemblies - Alfred Nobrega (Fermi National Accelerator Lab. (US))  
16:30
Wednesday PM - WP2/WP5/WP6B/WP10 - Roderik Bruce (CERN) (until 17:50) (31/3-004 - IT Amphitheatre)
16:30 Summary of EPC measurements - Guido Sterbini (CERN)  
16:50 DA distributed-computing simulations via BOINC and ML modelling - Carlo Emilio Montanari (The University of Manchester (GB))  
17:10 Mitigation strategies tested: what can be done at HL-LHC? - Bjorn Hans Filip Lindstrom (University of London (GB))  
17:30 Background simulations for FASER and SND in Run 4 - Alexandra Serban  
16:30
Wednesday PM - WP4 - Niklas John Templeton (STFC Daresbury Laboratory (GB)) (until 18:00) (6/2-024 - BE Auditorium Meyrin)
16:30 UK cryoline manufacture inspection, test experience and lessons learned - Carlos Manuel Guerra Granjeiro (STFC Daresbury Laboratory (GB))  
16:50 UK Quality management and continous improvement updates - Carlos Manuel Guerra Granjeiro (STFC Daresbury Laboratory (GB))  
17:10 RFD cryomodules production readiness and open issues - Robert Laxdal  
17:30 Discussion  
17:00
Steering Committee with US-AUP/WP3 (restricted) - Markus Zerlauth (CERN) (until 18:00)
19:00 --- Collaboration Banquet ---
12:00
Thursday AM - WP2/WP3 (1st part) - Susana Izquierdo Bermudez (CERN) (until 12:30) (30/7-018 - Kjell Johnsen Auditorium)
12:00 Updates on D1 field quality - Tatsushi Nakamoto (KEK)  
12:15 Results of sorting studies of the last four Q2 magnets - Andrea Fornara (CERN)  
12:30 --- Lunch break ---
14:00
Thursday PM - WP2/WP3 (2nd part) - Susana Izquierdo Bermudez (CERN) (until 15:40) (30/7-018 - Kjell Johnsen Auditorium)
14:00 Q2 integrated field and field quality - Lucio Fiscarelli (CERN)  
14:20 Q1/Q3 integrated field and field quality - Joseph DiMarco GianLuca Sabbi (LBNL)  
14:40 Magnetic axis on IT magnets - Mariano Pentella (CERN)  
15:00 Geometric axis on IT magnets - Vivien Rude (CERN)  
15:20 Impact of alignment measurements - Riccardo De Maria (CERN)  
14:00
Thursday PM - WP4 Flash - Ofelia Capatina (CERN) (until 15:40) (31/3-004 - IT Amphitheatre)
14:00 FE experience with DQW - Sara Domingo Gomez  
14:10 HOM measurements on RFD cavities - Subashini De Silva (Old Dominion University (US)) Alex Castilla (Lancaster University (GB))  
14:20 Experience with HOM cleanroom assembly - Marco Chiodini (CERN)  
14:30 HPR experience at JLab/Zanon & issues encountered - Subashini De Silva (Old Dominion University (US)) Alex Castilla (Lancaster University (GB))  
14:40 Materials quality control during manufacturing: cases studies - Claudia Tatiana Santos Maldonado  
14:50 Series cavity compliance w.r.t specification's drawings - Raphael Leuxe (CERN)  
15:00 CERN cryomodule/components manufacturing - Alex Verduyn  
15:10 CERN welded component production for collaborations - Myriam Elena Benahmed  
15:20 Mechanical and thermo-mechanical simulations - Joanna Sylwia Swieszek Eduardo Cano Pleite  
15:30 Cryomodule assembly procedures - Julien Dequaire  
14:00
Thursday PM - WP5 - Stefano Redaelli (CERN) (until 15:20) (30/7-010)
14:00 Status of the HL-UK collimation activities and prospect for 2026-2028 - Robert Barrie Appleby (University of Manchester (GB))  
14:20 News on BDSIM implementations - Bjorn Hans Filip Lindstrom (University of London (GB))  
14:40 Simulating machine impact on forward backgrounds with BDSIM - Alex Keyken (Royal Holloway, University of London (GB))  
15:00 DA simulations and long-term extrapolations - David Christie (The University of Manchester (GB))  
15:40 --- Coffee break ---
16:10
Close-out - Oliver Bruning (CERN) (until 16:30)
16:10 Close-out - Markus Zerlauth (CERN)  
16:30
Steering Committee with US-AUP/WP4 (restricted) - Markus Zerlauth (CERN) (until 17:30) (30/7-010)
17:30
Steering Committee with TRIUMF (restricted) - Markus Zerlauth (CERN) (until 18:30) (30/7-010)
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