Joint Accelerator Performance Workshop 2024

Contribution List

40. Introduction

Heiko Damerau (CERN), Matteo Solfaroli Camillocci (CERN)

10/12/2024, 10:30

1. Injectors performance overview and highlights in 2024 (20'+10')

Kevin Shing Bruce Li (CERN)

10/12/2024, 10:35

Setting the Scene

Keywords: Achievements (FT, LIU), Stand vs. BCMS, protons & ions, equipment needing attention and progress in monitoring, limitations emerged and perspectives, impact on operational efficiency of filling scheme (3x 36b vs hybrid)

2. Beam lines, feedback from operations (20'+10')

Dipanwita Banerjee (CERN)

10/12/2024, 11:05

Setting the Scene

Keywords: BSI calibration results, ASM planning proton sharing, electron beam quality in H6/H8 electron users, High intensity muon beam test in M2 (road to have higher intensity post-LS3), record high intensity electrons in H4, operation of H4-VLE (Neutrino Platform), CEDARs operation, user changeovers/preparations/planning, low momentum in East Area, East Area variable spill lengths. Major...

5. AD/ELENA - ISOLDE - AWAKE - CLEAR, feedback from operations (20'+10')

Davide Gamba (CERN)

10/12/2024, 11:35

Setting the Scene

Keywords: Operation of facilities, is modeling adequate, e.g., optics, impedance, aperture?, opportunities for automation and test bench new algorithms, critical equipment, integration of operation, need for instrumentation? feedback from experiments (AD/ELENA, AWAKE)

44. Feedback from FT experiments (10'+10')

Dragoslav Lazic (Boston University (US))

10/12/2024, 12:05

Setting the Scene

Keywords: 2024 highlights of EA, NA, nTOF, ISOLDE physics results (‘where protons are going’), beam quality (client view), upcoming expectations for 2025-6 (physics/infrastructure requirements & beam characteristics)

3. LHC performance overview and highlights in 2024 (15'+10')

Delphine Jacquet (CERN)

10/12/2024, 12:25

Setting the Scene

Keywords: Achievements and limitations, Standard vs. BCMS (brightness, tails), beam quality from injectors and preservation, high intensity, protons & ions, equipment fault analysis (why was summer such a good production period), operational efficiency, super-smooth injection and filling. Summary of ion operation.

6. Feedback from LHC physics (15'+10')

Federico Alessio (CERN)

10/12/2024, 14:10

Setting the Scene

Keywords: 2024 highlights of physics results (‘where protons are going’), beam quality (client view), upcoming expectations for 2025-6 (physics/infrastructure requirements & beam characteristics)

4. MDs in the CERN accelerator complex (15'+10')

Benoit Salvant (CERN)

10/12/2024, 14:35

Setting the Scene

Keywords: MD threads & requests, MD time allocation & adequacy including preparation (e.g., prep for LHC MDs in injectors), impact of intensity limitations on MD program (injectors, LHC), organisation and execution, relevance to operation

7. Consequences and opportunities of Run 3 extension (15'+10')

Panos Zisopoulos (CERN)

10/12/2024, 15:05

Operation <-> Equipment

• focus on injectors only
• risks to be taken, and difficulties to be encountered
• what could be anticipated in 2025/26 to optimise the post LS3 restart? e.g. needed studies
• proposal for a LIU Reliability Run; additional MDs to explore limits?

8. Fault tracking in 2024 (20'+10')

Jack Heron (CERN)

10/12/2024, 15:30

Operation <-> Equipment

• results of fault analysis per machine (including Exp. Areas)
• how are the results used? what is AFT ‘actually’ offering? e.g. proactive maintenance
• follow-up structure and reporting?
• features to be added, feedback from users (tools and automation covered in Session 6)

9. Cryogenics in LHC (10'+10')

Boyan-Kaloyanov Naydenov Popov (CERN)

10/12/2024, 16:00

Operation <-> Equipment

• IR8 cooling capacity and known limitations, available margins
• follow up on delaying of cryo valve opening (resulting in losses and dumps due to fast growing orbit oscillations, in 2023)

10. Noise and regulation in SPS power converters (10'+10')

Charles-Mathieu Genton (CERN)

10/12/2024, 16:20

Operation <-> Equipment

• mains regulationa and overshoot follow-up
• 50 Hz noise effects on SFTPRO spill, and on protons and ion LHC flat bottom losses;
• prospects for corrections on the hardware side

11. Beam instrumentation (focus up to 2026) (10'+10')

Inaki Ortega Ruiz (CERN)

10/12/2024, 17:10

Operation <-> Equipment

• equipment from commissioning to operation, exploitation and maintenance of existing instrumentation (focus up to 2026)
• HL preparation, NA-CONS and ECN3, ACC-Cons, feedback from BIFT on upcoming
  consolidation efforts and items not covered
• BSI, BGC, BGI, wire scanners, …
• ion beams

12. Experience with SPS RF and outlook (10'+10')

Dr Sam Pitman (CERN)

10/12/2024, 17:30

Operation <-> Equipment

• Thales plants: high failure rates, limited RF power
• status of understanding, solved and open issues, solutions and prospects

13. ABT Equipment: Operational Insights and Future Perspective (10'+10')

Giorgia Favia (CERN)

10/12/2024, 17:50

Operation <-> Equipment

• KFA71: missing pulses and availability; status, ongoing analysis (including EPA WP8), monitoring and future plans
• MKP: new voltage settings on MKP-L (are losses at flat bottom measurably better; plan towards nominal settings); plans to offset MKP to reduce beam induced heating on MKP-S (margins?)
• MKDH: strategy in case of replacement, options and implications on restart after...

14. Lessons learnt, ideas and best practises for new equipment design (15'+10')

Rui Franqueira Ximenes (CERN)

10/12/2024, 18:10

Operation <-> Equipment

• highlights of recent equipment designs, bright ideas, i.e. the bright side of the session, what was done right

15. Longitudinal modelling and operational optimisation across the complex (20'+10')

Birk Emil Karlsen-Baeck (Sapienza Universita e INFN, Roma I (IT))

11/12/2024, 08:30

Beam dynamics modelling <-> Equipment

• Control loops modelling and applications across the chain
• LHC power limitation at injection
• BCMS v. std longitudinal evaluation
• Modelling aspects of bunch length control in the ramp and flattop

16. Electron cloud (20'+10')

Lotta Mether (CERN)

11/12/2024, 09:00

Beam dynamics modelling <-> Equipment

• Where do we stand in the SPS and LHC?
• Update on e-cloud modelling, comparison with measurements and projections
• Optimum filling scheme options for 2025-2026 from e-cloud perspective (to be completed in the session 3 talk “LHC: issues, mitigations and plans”)

17. Impedance modelling and equipment design (20'+10')

Chiara Antuono (Sapienza Universita e INFN, Roma I (IT)), Michela Neroni (Sapienza Universita e INFN, Roma I (IT))

11/12/2024, 09:30

Beam dynamics modelling <-> Equipment

• Impedance modelling implications on equipment design (WS, BGI, TDIS, kickers, etc.)
• Intensity limitation update for the vacuum modules, any showstopper to start 2025 with 1.8e11 ppb?
• Update on impedance budget for LHC – which affect also HL-LHC?

18. Benchmarking of optics and magnetic models (15'+10')

Ewen Hamish Maclean (CERN)

11/12/2024, 10:30

Beam dynamics modelling <-> Equipment

• Magnetic model of the PS main magnets, improvement optics and application to other machines
• Control of Q and Q’
• Zero dispersion optics

19. Beam loss monitor thresholds (15'+10')

Sara Morales Vigo

11/12/2024, 10:55

Beam dynamics modelling <-> Equipment

• Changes in 2024 in thresholds (ions, TCPs, IR3 etc.)
• Do we need blindable injection BLMs?

20. Fixed target beams and challenges for the future (15'+10')

Pablo Arrutia (CERN)

11/12/2024, 11:25

Beam dynamics modelling <-> Operation

Prospect of running ISOLDE with higher intensity per shot in 2025 in view of future proton sharing, and status of upgrade project
Higher intensity for TOF
Fixed-target beams: bunch length/momentum spread/beam size (PSB, PS), spill quality (PS/SPS), losses
Higher intensity requests for North-Area post-LS3 + Beamline acceptance.
Beam for BDF/SHiP and intensity increase to 7e13, future beam...

24. Ions: overview and outlook accross the complex (20'+10')

Maciej Slupecki (CERN)

11/12/2024, 11:50

Beam dynamics modelling <-> Operation

Overview 2024
LHC oxygen run in 2025
Development for future ions after LS3
Status of the source and LINAC3 accelerator model
ALICE background and crystals stability
Beam quality in the injectors, in particular LEIR and SPS (issue in 2023). What should be improved or done differently?

21. Beam quality preservation for LHC beams (20'+10')

Sofia Kostoglou (CERN)

11/12/2024, 12:20

Beam dynamics modelling <-> Operation

Emittance growth and tail generation along the chain: mechanism, mitigation, and impact in LHC itself; influence of PS transition, transfer lines matching, degradation beyond burn-off.
Losses in PS-to-SPS, SPS, and at LHC injection: why is the situation improved in 2024? (blindable BLMs to be commissioned if long trains?)
Optimization of LHC2025 filling scheme in terms of filling time / beam...

22. Collimation aspects in the LHC and SPS (15'+10)

Frederik Van Der Veken (CERN)

11/12/2024, 14:10

Beam dynamics modelling <-> Operation

Phase knob, collimator hierarchy breakage, DA simulations: how models feed into operation settings (theoretical modelling, simulations and understanding)
Tail population from scraping (EoF + MD), LRBB wire compensator effect on tail population, …
Beam studies towards a dedicated SPS collimation system

23. Optics aspects in the accelerator complex (20'+10')

Felix Simon Carlier (CERN)

11/12/2024, 14:35

Beam dynamics modelling <-> Operation

LEIR - progress / challenges to optics measurement (tools, BPMs, lack of good models)
PS - zero dispersion optics to improve emittance measurement, deconvolution tests, comment on viability to other machines if progress made
LHC - general status of optics studies - what is standard vs expert. What developments of tools are needed.
LHC - AC-dipole status - critical spares.
LHC commissioning...

25. LHC: issues, mitigations (15'+10')

Andrea Calia (CERN)

11/12/2024, 15:05

Beam dynamics modelling <-> Operation

LHC collimator hierarchy breakage operational response, mitigations
FASER/SND background, cures, compatibility with RP optics
LHC aperture: measurements and performance (beta*/xing angle) reach
Intensity limits at LHC from RF vacuum modules - can we unlock for 2025? RF fingers and bunch intensity limitation? (just a slide on long. Bunch. Control over ramp)

26. LHC: configuration 2025/26, intensity ramp-up, polarity reversal, optics (20'+10')

Xavier Buffat (CERN)

11/12/2024, 15:30

Beam dynamics modelling <-> Operation

RP optics, crossing planes, flat optics, consider the use of flat optics either for necessity in the HV crossing configuration or for performance in the current VH configuration (e.g. 30/20cm). Further improvements: reducing the xing angle at the end of leveling? + wire …?
E-cloud modelling and heat-load in cold magnets (only impact on performance 2025-HL, confirmed trend from previous...

45. Session 2/3 discussion session

Cedric Hernalsteens (CERN), Daniele Mirarchi (CERN), Foteini Asvesta (CERN), Helga Timko (CERN)

11/12/2024, 16:00

Beam dynamics modelling <-> Operation

27. Settings management – status and plans (15'+10')

Michi Hostettler (CERN)

11/12/2024, 16:45

Controls, data and automation <-> Operation

2024 report: settings-related issues and improvements
Future plans: what will be done in 2025 and beyond, with resource requests
Settings management in the automation context: online checks for all machines, avoiding trim conflicts (human <-> controller, controller <-> controller)
(Replacement of CESAR)

28. Dynamic beam scheduling and automated LHC filling (20'+10')

Amaury Beeckman

11/12/2024, 17:10

Controls, data and automation <-> Operation

Beam scheduling: progress in 2024 and future plans
Automatic LHC beam preparation
Progress in 2024 across complex (online beam quality monitoring, optimizers, sequences / orchestration)
Future plans and missing pieces across complex (PSB, PS, SPS)

29. Results and plans for integration of automation and optimization in operation (20'+10')

Georges Trad (CERN)

11/12/2024, 17:40

Controls, data and automation <-> Operation

Frameworks: mostly generic steering (experience in 2024, limitations, plans)
Status & plans for automatic controllers:
What is used operationally, under development? E.g. PS MTE efficiency, SPS spill noise, LEIR progress, automation tests at CLEAR, LHC collimators & procedures for alignment
Where do we want to be by LS3?
Other: continuous optimization vs on-demand, interaction between controllers

30. OP feedback and recommendations as we move towards automation (15'+10')

Denis Gerard Cotte (CERN)

11/12/2024, 18:10

Controls, data and automation <-> Operation

Feedback from operation team on usability and integration of automation tools
How to improve interaction with controllers (e.g. manual intervention)
Limitations: diagnostics / monitoring, performance of autopilots
Automatic fault tracking and analysis

31. Beam physics/simulation software evolution: challenges, opportunities (20'+10')

Szymon Lopaciuk (CERN)

12/12/2024, 08:45

Beam dynamics modelling <-> Controls, data and automation

Xsuite: overview on status and long term plans.
Opportunities from transitioning to modern technologies(e.g. python integration, live simulations in operation and MD, integration of AI)
Integration of (full) simulators in control system - status, challenges, required collaborations
Synergies in modelling and design choices between next generation of accelerators and present ones.

32. Integrated management of accelerator models: digital thread (15'+10')

Riccardo De Maria (CERN)

12/12/2024, 09:15

Beam dynamics modelling <-> Controls, data and automation

Current status of equipment integration description and configuration across sector and ongoing efforts (E2A)
Where do we want to go?
Are current efforts for cleaning up “digital thread” sufficient?

33. Data and computing resources for analysis (15'+10')

Marcin Sobieszek (CERN)

12/12/2024, 09:40

Beam dynamics modelling <-> Controls, data and automation

NXCALS, JAPC, LSA: overview of users needs and experience
Introduce “Smart and agile equipment paradigm” from EPA WP8: online and offline analysis requirements
Introduce the developments of DPP and timelines
What about GPUs for advanced analysis and integration of active and continual learning schemes?

34. Surrogate models (15'+10')

Francesco Maria Velotti (CERN)

12/12/2024, 10:05

Beam dynamics modelling <-> Controls, data and automation

Why surrogate models and why surrogates with ML?
How to incorporate inductive bias? PINNs, symmetries,…
Examples and prospects
Infrastructure requirements for full integration in control room (storage, refer back to previous talk,…)

35. Hysteresis modeling: experience from SPS and prospects for other machines (15'+10')

Anton Lu (Technische Universität Wien (AT))

12/12/2024, 11:00

Beam dynamics modelling <-> Controls, data and automation

Status and prospects for required magnetic measurements
Modeling techniques
Timeline and prospects

36. Time spent on interventions by equipment experts/piquets (15'+10')

Kostas Papastergiou (CERN)

12/12/2024, 11:30

Equipment <-> Controls, data and automation

How much time do equipment experts and piquets spend on remote and local interventions?
Is there sufficient data available across the groups to do this analysis?
What kind of data exists across the groups (what is logged?) and what would be needed in addition to extend the analysis?
Can we quantify the potential gain from automating remote interventions?
Can we differentiate between simple...

37. Automatic fault analysis and prognostics (20'+10')

Anti Asko (CERN)

12/12/2024, 11:55

Equipment <-> Controls, data and automation

How can we avoid that equipment experts spend so much time supporting operations?
How are we using fault data today and what is the vision for the future?
Do we have a full overview of all systems now?
Does the available data allow us to do global prognostics?
What operational solutions exist today for anomaly detection for prognostics (include examples from the different groups, e.g. MKP...

38. Automation of equipment commissioning, setting up and recovery (20'+10')

Raul Murillo Garcia (CERN)

12/12/2024, 13:50

Equipment <-> Controls, data and automation

How can we avoid that equipment experts spend so much time supporting operations?
Include an overview of which and how interventions are done remotely across groups.
Which interventions can be automated and what has to be considered (robustness of the solutions, extensive pre-studies and risk analysis of possible failure modes, redundancy designed into the system, remote diagnostics and...

39. Automation during the equipment design process

Francisco Huhn (CERN)

12/12/2024, 14:20

Equipment <-> Controls, data and automation

Development philosophy of accelerator modelling tools
What tools are available outside of CERN? What do companies do today?
include a good example of the classic approach to hardware design simulations compared to a modern approach using faster and potentially even more precise tools
What needs to and can be done to replace parameter scans with optimisation algorithms? What’s the potential...

47. Session 5/6 discussion session

Alexander Huschauer (CERN), Francesco Maria Velotti (CERN)

12/12/2024, 14:50

Equipment <-> Controls, data and automation

46. Close-out

Heiko Damerau (CERN), Matteo Solfaroli Camillocci (CERN)

12/12/2024, 15:20

41. Discussion

Setting the Scene

42. Discussion

Beam dynamics modelling <-> Equipment

43. Discussion

Beam dynamics modelling <-> Controls, data and automation