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9th LHC Operations Evian Workshop
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Hotel Ermitage
Hotel Ermitage
Evian-les-Bains
Rende Steerenberg
(CERN)
Description
The 9th LHC Operations Evian Workshop will take place at the Hotel Ermitage in EVIAN (74), France, from January 30th to February 1st, 2019.
Attendance is by invitation only.
The 9th LHC operations workshop aims at reviewing and documenting the whole run 2, from the re-commissioning after LS1 until the last beam dump in December 2018, and take lessons learned for the re-commissioning after LS2. This includes:
- Review of the Run II LHC operation, performance and availability, including hardware and beam commissioning, both after LS1 and the YETS’;
- Perform a critical review of individual system performance and address main issues encountered together with their mitigation;
- Examine beam related issues for the adopted operational scenarios and outline the chosen solutions;
- Highlight known open points related to hardware and/or beam operation and performance that remain to be addressed before or during the re-commissioning after LS2;
- List principal work and changes foreseen for LS2 that need to be taken into account for the re-commissioning;
- A preliminary outlook to the possible Run III performance reach.
| Chair: Rende Steerenberg | Program Committee |
| - Wolfgang Bartmann | |
| Co-Chair: Jorg Wenninger | - Enrico Bravin |
| - Markus Brugger | |
| Editors of the Proceedings | - Elias Metral |
| - Michaela Schaumann | - David Nisbet |
| - David Walsh | - Yannis Papaphilippou |
| - Sylvia Dubourg | - Stefano Redaelli |
| - Rende Steerenberg | |
| Informatics & Infrastructure support | - Helga Timko |
| - Hervé Martinet | - Jorg Wenninger |
| - Markus Zerlauth | |
| Workshop Secretary: Sylvia Dubourg |
Support
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08:00
→
09:30
Bus transport CERN - Evian 1h 30m
-
09:30
→
10:10
Welcome Coffee / Tea 40m
-
10:10
→
10:30
Opening of the Workshop 20mSpeaker: Rende Steerenberg (CERN)
-
10:30
→
12:30
Session 1: Overview of Run 2Conveners: Georges Trad (CERN), Roderik Bruce (CERN)
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10:30
Overview of Proton Runs During Run 2 (20' + 10') 30m
- Emphasis on 2018, but include previous post-LS1 years too.
- Include specials physics runs (overhead etc.)
Speaker: Belen Maria Salvachua Ferrando (CERN) -
11:00
Overview of ion runs during run 2 (20' + 10') 30m
- Emphasis on 2018, but include previous post-LS1 years too.
- Include specials physics runs (overhead etc.)
- Include p-pb
Speaker: John Jowett (CERN) -
11:30
LPC's View on Run 2 (20' + 10') 30m
- Experiments view on run 2
- Special runs
Speaker: Christoph Schwick (CERN) -
12:00
LHC & Injectors Availability Run 2 (20' + 10')) 30m
- Overview and system based analysis
- Compare different years
Speaker: Benjamin Todd
-
10:30
-
12:30
→
14:00
Lunch 1h 30m
-
14:00
→
15:30
Session 1: Overview of Run 2Conveners: Georges Trad (CERN), Roderik Bruce (CERN)
- 14:00
-
14:30
Run 2 Optics and Corrections (20' + 10') 30m
- Linear / non-linear corrections
- Is the machine drifting - beta beat differences ?
- Coupling decays at injection can we apply a cure for the future?
- Crossing angle levelling and non-linearities
Speaker: Tobias Hakan Bjorn Persson (CERN) -
15:00
Powering Tests & Magnet Training (20' + 10') 30m
- Overview HW re-commissioning
- Did we become more efficient ?
- How to re-qualify circuits after interventions ?
- Magnet training campaigns: overview and results
- Will we be able to run at 7 TeV ?
- Will running at energies beyond 6.5 TeV as reliable or less reliable?
Speaker: Matthias Mentink (CERN)
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15:30
→
16:00
Coffee / Tea 30m
-
16:00
→
18:00
Session 2: Systems OverviewConveners: Theodoros Argyropoulos (CERN), Tom Levens (CERN)
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16:00
General Technical Services (20' + 10') 30m
- Overview of issues with general infrastructure during run
- Improvement applied
- Remaining worry points
Speaker: Luigi Serio (CERN) -
16:30
Cryogenics (20' + 10') 30m
- Availability overview with main issues
- Main evolution of the system during run 2
- Limitations encountered during run 2 and those that will remain after LS2
- Main changes foreseen during LS2 and their impact on restart or operation
Speaker: Mr Gerard Ferlin (CERN) -
17:00
Controls and the AFT Tool (20' + 10') 30m
- Did the smooth upgrades work or do we deploy too many tests ?
- Logging database and NXCALS plans
- How can we connect our tools to NXCALS?
- Major changes for LS2 ?
- Get feedback from the users
- AFT: where do we come from and wher do we go?
- AFT: what did it bring ?
Speaker: Chris Roderick (CERN) -
17:30
The RF System (20' + 10') 30m
- Availability overview with main issues
- Main evolution of the system (e..g detuning)
- Spare situation
Speaker: Katarzyna Turaj (CERN)
-
16:00
-
20:00
→
22:00
Dinner - Restaurant 2h
-
08:00
→
09:30
-
-
08:30
→
10:00
Session 2: Systems OverviewConveners: Theodoros Argyropoulos (CERN), Tom Levens (CERN)
-
08:30
Injection Systems (20' + 10') 30m
- MKI evolution during run 2
- How are the new TDI's behaving and are there remaining issues ?
- Is injection beam line steering under control ?
Speaker: Francesco Maria Velotti (CERN) - 09:00
-
09:30
Emittance Measurements (20' + 10') 30m
- Overview of the systems and their limitations
- Issues and improvements run 2
- Will we have an emittance measurement for all phases of the cycle ?
Speaker: Georges Trad (CERN)
-
08:30
-
10:00
→
10:30
Coffee / Tea 30m
-
10:30
→
12:30
Session 3: Systems OverviewConveners: Belen Maria Salvachua Ferrando (CERN), Christoph Wiesner (CERN)
-
10:30
LBDS Performance (20' + 10') 30m
- Reliability of the system/lessons learnt during Run 2 and from re-commissioning after LS1
- What are the main evolutions of the system during Run 2? What were the main limitations encountered and which limitations will remain for Run 3?
- What are the main changes foreseen and how will they impact machine operation?
- Can we reach 1.8E11 ppb in 1.8 um? If not, what mitigation measure is needed?
- MKD/MKB erratics and MKB flashover: evolution and mitigations
- Asynchronous Beam Dumps Tests: Evolution of losses? Can we improve the procedure?
- Abort Gap protection and implementation of the variable AGK
- XPOC reset: Beam losses? BTVDD image? BTVDD issue end of 2018?
- BETS TCDQ interlock and operational flexibility?
Speaker: Chiara Bracco (CERN) -
11:00
LHC Dump Assembly – Operational Feedback and Future Prospective (15' + 10') 25m
- What are the main evolutions of the system during Run 2? - What were the main limitations encountered and which limitations will remain for Run 3?
- What are the main changes foreseen and how will they impact machine operation?
- Can we reach 1.8E11 ppb in 1.8 um? If not, what mitigation measure is needed?
Speaker: Antonio Perillo Marcone (CERN) -
11:25
Power Converters and their control (20' + 10') 30m
- Evolution of power converter and their control during run 2
- FGC-lite feedback on experience and plans for LS2
- Will R2E still be an issue ?
- Impact of changes for operating the machine during run 3
Speaker: Slawosz Uznanski (CERN) -
11:55
Quench Protection System (20' + 10') 30m
- Reliability of the system/lessons learnt during Run 2 and from re-commissioning after LS1
- What are the main evolutions of the system during Run 2? What were the main limitations encountered and which limitations will remain for Run 3?
- What are the main changes foreseen and how will they impact machine operation?
- R2E is there an issue and do we foresee mitigation?
- Trips during ramp-down: causes/mitigation?
- PM for SEU events? Communication problem and missing PM?
- Quench heaters is there a potential issue for Run 3?
- "No QPS" signal and masking?
Speaker: Tomasz Podzorny (CERN)
-
10:30
-
12:30
→
14:00
Lunch 1h 30m
-
14:00
→
15:30
Session 3: Systems OverviewConveners: Belen Maria Salvachua Ferrando (CERN), Christoph Wiesner (CERN)
-
14:00
Collimation (20' + 10') 30m
- Performance and evolution of the system
- Collimation controls: alignments and settings, BPMs
- Decreasing setting up time and can OP play a bigger role in setting up?
- Loss maps: what did we improve and can we improve further?
- Operational aspects
- Crystals collimation: contact EN-STI for input
Speaker: Nuria Fuster Martinez (CERN) -
14:30
ADT and ObsBox (20' + 10') 30m
- Evolution during the Run
- Is noise an issue and can we do better?
- Feedback from the users?
- What changes are foreseen?
Speaker: Martin Soderen (CERN) -
15:00
Machine Protection System (20' + 10') 30m
- Have we been running the machine always safely during run 2 (normal & MD running)?
- Intensity ramp-ups: evolution during the run, issues found and time required
- Main failure cases encountered
- Experience with software/hardware interlocks
Speaker: Daniel Wollmann (CERN)
-
14:00
-
15:30
→
16:00
Coffee / Tea 30m
-
16:00
→
18:25
Session 4: Beam performance during run 2Conveners: Guido Sterbini (CERN), Michaela Schaumann (CERN)
-
16:00
Machine Configuration (20' + 10') 30m
- Run 2 machine configuration (focus on beta*, crossing angle and collimation settings)
- Aperture measurements, influence on beta start, levelling options and collimation settings
- Evolution of the collimation configuration during Run2 and justification
- Impact on performance
- Lessons learned
Speaker: Roderik Bruce (CERN) -
16:30
Transverse Emittance Blow up (15' + 10') 25m
- Fundamental mechanisms of blow up, mechanism included in simulation.
- Luminosity model recap
- Emittance blow up along Run2
- Emittance blow up at injection, along the cycle and in STABLE (emittance from experiment, emittance scans, BSRT)
- BSRT calibration and influence on conclusions
- Observations in comparison to model: do we understand the extra emittance blow up?
- Scaling with brightness and intensity
Speaker: Stefania Papadopoulou (CERN) -
16:55
Luminosity, lifetime and modelling (15' + 10') 25m
- Lifetime/losses during the cycle (BCT, FBCT)
- Lifetime during the levelling (crossing angle, beta*, separation)
- Dependence on beam-beam encounter schedule
- DA studies for crossing angle levelling
- Asymmetry B1/2
- Impact on chromaticity, octuples, tunes
- Status of the luminosity model
Speaker: Sofia Kostoglou (National Technical Univ. of Athens (GR)) -
17:20
Special Losses (15' + 10') 25m
- Overview of BLM threshold strategy
- UFOs: Are they still an issue? Statistics of Run2 and projections for Run3
- ULO
- 16L2: understanding, mitigation strategy, lessons learnt and actions taken
- 10 Hz dumps (protons/ions)
Speaker: Daniele Mirarchi (University of Manchester (GB)) -
17:45
Electron Cloud & Heat Loads (20' + 10') 30m
- Overview of e-cloud studies and observations in Run2
- Different behaviour of sector
- Extra instrumentation
- Implications for machine operation
- Interventions planed in LS2
- Performance limitation for Run3
Speaker: Giovanni Iadarola (CERN)
-
16:00
-
18:30
→
19:00
Cocktail 30m
- 19:10 → 19:50
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20:00
→
22:00
Dinner - Restaurant 2h
-
08:30
→
10:00
-
-
08:30
→
10:00
Session 4: Beam performance during run 2Conveners: Guido Sterbini (CERN), Michaela Schaumann (CERN)
-
08:30
Transverse Instabilities (20' + 10') 30m
- Overview of coherent instabilities in all operational phases during Run2
- Impact on performance
- Diagnostics and tools
- Mitigation strategies evolution and plans
Speaker: Xavier Buffat (CERN) -
09:00
Longitudinal dynamics (20' + 10') 30m
- Overview of advances during Run2
- Controlled longitudinal blow up during ramp and collisions
- Phase control issues encountered
- Full and half detuning
- Capture voltage optimisation
- PELP and PPLP
- Intensity limitations
- Prospects for Run3
Speaker: Helga Timko (CERN) -
09:30
Machine Developments (20' + 10') 30m
- Overview and statistics of MD periods and priorities in Run2
(number of MD's, MD categories, End-of-fill MDs, time spend, unavailable MD time, LHC/HL-LHC/Physics Beyond Colliders) - What moved into operation?
- Organisational and machine protection aspects
- Prospects for Run3
Speaker: Jan Uythoven (CERN) - Overview and statistics of MD periods and priorities in Run2
-
08:30
-
10:00
→
10:30
Coffee / Tea 30m
-
10:30
→
12:30
Session 5: A preliminary look aheadConveners: Dr Mirko Pojer (CERN), Xavier Buffat (CERN)
- 10:30
-
11:00
Desiderata and constraints from the experiments (20' + 10") 30m
- Pile up limit from the different experiments
- Preferences in terms of levelling scheme
- Preferences on crossing angles configurations
- Possible special runs
Speaker: Brian Petersen (CERN) -
11:30
Report from the Run 3 configuration working group (20' + 10') 30m
- Constraint / boundaries etc.
- Performance estimates
Speaker: Nikos Karastathis (CERN) -
12:00
Open Discussion (30') 30m
-
12:30
→
13:00
Closure of the Workshop 30mSpeaker: Rende Steerenberg (CERN)
-
13:00
→
13:45
Finger Food 45m
-
13:45
→
15:15
Bus transport Evian - CERN 1h 30m
-
08:30
→
10:00
