Name: 15th HL-LHC Collaboration Meeting, CERN, 29 September - 2 October 2025
Start: 2025-09-29T08:00:00+02:00
End: 2025-10-03T17:30:00+02:00
Location: No location set

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)

Monday, 29 September 2025

08:00 Registration at the Science Gateway
Registration at the Science Gateway
08:00 - 09:00
Room: 81/S-006
09:00 Plenary session 1 - Monday AM
09:00 - 10:20
Room: 81/R-003 Science Gateway Auditorium BC
Contributions

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
Group picture (Science Gateway Piazza) and Coffee break
10:20 - 10:50
Room: 81/R-003 Science Gateway Auditorium A
10:50 Plenary session 2 - Monday AM
10:50 - 12:30
Room: 81/R-003 Science Gateway Auditorium BC
Contributions

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))
12:30 Lunch break
Lunch break
12:30 - 14:00
14:00 Plenary session 1 - Monday PM
14:00 - 15:30
Room: 81/R-003 Science Gateway Auditorium BC
Contributions

14:00 Status of WP4 crab cavities - Ofelia Capatina (CERN)

14:30 UK contribution: Status of DQW cryomodules - Niklas John Templeton (STFC Daresbury Laboratory (GB)) Niklas Templeton

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
Coffee break
15:30 - 16:00
Room: 81/R-003 Science Gateway Auditorium A
16:00 Plenary session 2 - Monday PM
16:00 - 17:40
Room: 81/R-003 Science Gateway Auditorium BC
Contributions

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
Welcome drink
18:00 - 20:00
Room: 80/1-001 - Globe of Science and Innovation - 1st Floor
Tuesday, 30 September 2025

08:30 Collaboration Board (restricted)

08:30 - 11:00
Room: 160/1-009

Guided visit to IT String (SM18, FR) and HL-LHC Point1 (CH)

08:30 - 11:00

11:00 Coffee break
Coffee break
11:00 - 11:30
Room: 81/R-003 Science Gateway Auditorium A
11:30 Plenary session 1 - Tuesday AM
11:30 - 13:00
Room: 81/R-003 Science Gateway Auditorium BC
Contributions

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)
13:00 Lunch break
Lunch break
13:00 - 14:30
14:30 Plenary session 1 - Tuesday PM
14:30 - 16:00
Room: 81/R-003 Science Gateway Auditorium BC
Contributions

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
Coffee break
16:00 - 16:30
Room: 81/R-003 Science Gateway Auditorium A
16:30 Plenary session 2 - Tuesday PM
16:30 - 17:30
Room: 81/R-003 Science Gateway Auditorium BC
Contributions

16:30 WP17 Infrastructure, Logistics & Civil Engineering - Henry De Maynard (CERN) Silvia Grau (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)
Transfer from/to CERN and HLCB Dinner (by invitation)
18:45 - 21:00
Wednesday, 1 October 2025
08:30 Wednesday AM - WP13
08:30 - 10:30
Room: 6/R-012 - conference room
Contributions

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
Wednesday AM - WP2/OP
08:30 - 10:30
Room: 31/3-004 - IT Amphitheatre
Contributions

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)
Wednesday AM - WP3/WP6A/WP7/WP16/MCF
08:30 - 10:50
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

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)
Wednesday AM - WP4
08:30 - 10:30
Room: 6/2-024 - BE Auditorium Meyrin
Contributions

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
Wednesday AM - WP8/WP12/WP10/WP19
08:30 - 10:30
Room: 30/7-010
Contributions

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
Coffee break - WP2/WP5/WP7/WP10/WP13/OP
10:30 - 11:00
Room: 31/3-009 - IT Amphitheatre Coffee Area

Coffee break - WP3/WP6A/WP7/WP8/WP10/WP12/WP16/WP19
Coffee break - WP3/WP6A/WP7/WP8/WP10/WP12/WP16/WP19
10:30 - 11:10
Room: Annex to 30/7-018

Coffee break - WP4 & WP13
Coffee break - WP4 & WP13
10:30 - 11:00
Room: In front of Cafeteria Bldg.6
11:00 Wednesday AM - WP13
11:00 - 12:30
Room: 6/R-012 - conference room
Contributions

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))
Wednesday AM - WP2/WP5/WP7/WP10/WP13
11:00 - 12:50
Room: 31/3-004 - IT Amphitheatre
Contributions

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)
Wednesday AM - WP4
11:00 - 12:35
Room: 6/2-024 - BE Auditorium Meyrin
Contributions

11:00 RFD horizontal HOM couplers: Fabrication and outlook - Naeem Abdul Huque Naeem 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)
Wednesday AM - WP8/WP12/WP10/WP19
11:00 - 12:20
Room: 30/7-010
Contributions

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
11:10 - 12:50
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

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)
12:30 Lunch break
Lunch break
12:30 - 14:00

14:00 Guided visit to IT String (SM18, FR) and HL-LHC Point1 (CH)

14:00 - 16:30
Wednesday PM - WP2/OP
14:00 - 15:20
Room: 31/3-004 - IT Amphitheatre
Contributions

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)
Wednesday PM - WP3
14:00 - 15:40
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

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)
Wednesday PM - WP4
14:00 - 16:00
Room: 6/2-024 - BE Auditorium Meyrin
Contributions

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 - Edward Jordan (Unknown) Edward Stephen Jordan (STFC Daresbury Laboratory (GB))

15:40 First North American OVC and lessons learned - Oliver Law (TRIUMF)
15:40 Coffee break - WP3
Coffee break - WP3
15:40 - 16:10
Room: Annex to 30/7-018

16:00 Coffee break - WP2/WP5/WP6B/WP10
Coffee break - WP2/WP5/WP6B/WP10
16:00 - 16:30
Room: 31/3-009 - IT Amphitheatre Coffee Area

Coffee break - WP4
Coffee break - WP4
16:00 - 16:30
Room: In front of Cafeteria Bldg.6
16:10 Wednesday PM - WP3
16:10 - 17:00
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

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
16:30 - 17:50
Room: 31/3-004 - IT Amphitheatre
Contributions

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
Wednesday PM - WP4
16:30 - 18:00
Room: 6/2-024 - BE Auditorium Meyrin
Contributions

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)

17:00 - 18:00
Room: 30/7-010

19:00 Collaboration Banquet
Collaboration Banquet
19:00 - 23:00
Room: 81/R-003A - Science Gateway Auditorium A
Thursday, 2 October 2025
08:30 Thursday AM - WP2/WP4/WP5
08:30 - 10:30
Room: 31/3-004 - IT Amphitheatre
Contributions

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)
Thursday AM - WP3/WP12/WP13
08:30 - 10:30
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

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
Coffee break - WP2/WP4/WP5/WP13
10:30 - 11:00
Room: 31/3-009 - IT Amphitheatre Coffee Area

Coffee break- WP2/WP3/WP5/WP7/WP14
Coffee break- WP2/WP3/WP5/WP7/WP14
10:30 - 11:00
Room: Annex to 30/7-018

11:00 Steering Committee with INFN (restricted)

11:00 - 12:00
Room: 30/6-019
Thursday AM - WP2/WP4/WP13
11:00 - 12:30
Room: 31/3-004 - IT Amphitheatre
Contributions

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)
Thursday AM - WP5/WP7/WP14
11:00 - 12:50
Room: 30/7-010
Contributions

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)
12:00 Thursday AM - WP2/WP3 (1st part)
12:00 - 12:30
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

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
Lunch break
12:30 - 14:00
14:00 Thursday PM - WP2/WP3 (2nd part)
14:00 - 15:40
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

14:00 Q2 integrated field and field quality - Lucio Fiscarelli (CERN)

14:20 Q1/Q3 integrated field and field quality - GianLuca Sabbi (LBNL) Joseph DiMarco

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)
Thursday PM - WP4 Flash
14:00 - 15:40
Room: 31/3-004 - IT Amphitheatre
Contributions

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 - Eduardo Cano Pleite Joanna Sylwia Swieszek

15:30 Cryomodule assembly procedures - Julien Dequaire
Thursday PM - WP5
14:00 - 15:20
Room: 30/7-010
Contributions

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
Coffee break
15:40 - 16:10
Room: Annex to 30/7-018
16:10 Close-out
16:10 - 16:30
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

16:10 Close-out - Markus Zerlauth (CERN)
16:30 Steering Committee with US-AUP/WP4 (restricted)

16:30 - 17:30
Room: 30/7-010

17:30 Steering Committee with TRIUMF (restricted)

17:30 - 18:30
Room: 30/7-010
Friday, 3 October 2025

08:30 Guided visit to IT String (SM18, FR) and HL-LHC Point1 (CH)

08:30 - 11:00

Steering Committee with IHEP (restricted)

08:30 - 09:30
Room: 30/6-019

09:30 Steering Committee with CIEMAT (restricted)

09:30 - 10:30
Room: 30/6-019

10:30 Coffee break
Coffee break
10:30 - 11:00