LHC Lumi Days 2019

Name: LHC Lumi Days 2019
Start: 2019-06-04T09:00:00+02:00
End: 2019-06-05T19:00:00+02:00
Location: CERN

4 Jun 2019, 09:00 → 5 Jun 2019, 19:00 Europe/Zurich

874/1-011 (CERN)

874/1-011

CERN

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Anne Dabrowski (CERN), Ilias Efthymiopoulos (CERN), Witold Kozanecki (University of Manchester (GB))

Description

Following the successful 2011 and 2012 meetings, we propose a new edition of LHC LumiDays, dedicated to luminosity and emittance measurements during Run 2. The goal is to review the progress, over the last 4 years, in the determination of the LHC luminosity, the measurement and understanding of the emittance, and the modeling of the luminosity based on the measured or calculated evolution of single-beam parameters.

This workshop will focus on the Run-2 results and will be followed by another one in early to mid 2020 to discuss in detail the strategy for Run-3.

A list of useful references and documents of relevance for the workshop can be found here, as well as in the proceedings of the past workshop available from
http://cdsweb.cern.ch/record/1347440

Program organization:

Exp: F. Alessio, V. Balagura, J. Contreras-Nuno, A. Dabrowski, M. Gagliardi, R. Hawkings, W. Kozanecki, R. Matev, A. Polini, D. Stickland

LPC: B. Petersen

Accel: H. Burkhardt, I. Efthymiopoulos, S. Fartoukh, R. Jones, T. Lefevre, Y. Papaphilippou, G. Sterbini, R. Tomas-Garcia, G. Trad, J. Wenninger

Proceedings
Speakers should write-up their contributions (1 paper per talk, no page limit but recommended length approx. 5 pages) by using the JACoW templates.
All papers (format ps and word or LATeX with images, no pdf files) are to be uploaded directly the indico timetable, with initial target date end of October 2019.

Dinner: Bois Joly nearby CERN just up the Jura mountains. Leaving CCC 18:30 car pool. Seated for dinner 19:00.

Registration

Registration Form

Participants

Alessandro Polini
Alex Kastanas
Andrea Calia
Andreas Meyer
Angela Barbaro Galtieri
Angela Giraldi
Ankita Mehta
Anne Dabrowski
Anton Babaev
Arkadiusz Gorzawski
Arkady Lokhovitskiy
Benedetto Giacobbe
Brian Petersen
Chris Palmer
Claudia Tambasco
Daniele Butti
David Stickland
David Walter
Davide Bozzato
Dragoslav Lazic
Enrico Bravin
Ewen Hamish Maclean
Fanouria Antoniou
Federico Alessio
Federico Roncarolo
Filip Moortgat
Gabor Veres
Gabriella Pasztor
Georges Trad
Georgios Krintiras
Giacinto De Cataldo
Gianluigi Arduini
Guido Sterbini
Hannes Bartosik
Hector Garcia Morales
Helga Timko
Ilias Efthymiopoulos
Jacqueline Keintzel
James Frost
Jan Pucek
Jonas Strandberg
Jorg Wenninger
Joscha Knolle
Joseph Carter
Konstantinos Paraschou
Leon Van Riesen-Haupt
Lily Celine Blondel
Lukas Malina
Mahmoud Gadallah
Manuella Vincter
Marcus Palm
Marek Gasior
Martino Gagliardi
Masaya Ishino
Massimo Giovannozzi
Mateusz Dyndal
Matteo Solfaroli Camillocci
Michail Zampetakis
Michi Hostettler
Moritz Guthoff
Natalia Triantafyllou
Nenad Vranjes
Nikos Karastathis
Oleksii Turkot
Olena Karacheban
Patrawan Pasuwan
Patrick Odier
Paul Lujan
Peter Major
Rafael Sosa
Richard Hawkings
Rogelio Tomas Garcia
Rongrong Cai
Rosen Matev
Ruchi Chudasama
Samuel Ross Meehan
Sergei Malyukov
Sergey Antipov
Sofia Kostoglou
Stefan Spanier
Stefania Papadopoulou
Stefano Mazzoni
Stephane Fartoukh
Tatiana Pieloni
Tatjana Susa
Tirsi Prebibaj
Valerie Lang
Vasiliki Kouskoura
Vladislav Balagura
Witold Kozanecki
Wolfgang Hofle
Xavier Buffat
Yannis Papaphilippou

Contact

lhc-lumidays-2019@cern.ch

ilias.efthymiopoulos@cern.ch

Tuesday, 4 June
- Tue, 4 Jun
- Wed, 5 Jun
- Session 1a: Luminosity-determination methodology in Run 2 (part A)
  
  Introduction and first set of overview presentations
  
  Convener: Anne Dabrowski (CERN)
  - 1
    
    Welcome - workshop program and goals
    
    Speaker: Ilias Efthymiopoulos (CERN)
    
    Welcome.pdf
    
    Welcome.pptx
  - 2
    
    LHC Luminosity optimisation and operation schemes
    
    Overview of operations in Run 2:
    - beam types and filling schemes,
    - luminosity -leveling and anti-leveling schemes,
    - scans for luminosity (lumi server): vdM fills, emittance scan algorithms, special fills...
    
    Speaker: Michi Hostettler (CERN)
    
    lumi-days-op-run2.pdf
    
    LumiDays_Proc_Michi.pdf
  - 3
    
    Overview of ATLAS luminosity determination methodology in Run 2
    
    Global view of
    - calibration strategy: vdM (including generic aspects for all expts), LSC, calibration transfer/non-linearity corrections, instrumental effects...)
    - long-term monitoring strategy (details & results thereof in talk on 2nd morning)
    - achieved systematic uncertainty on the luminosity, per year
    - where could we improve for Run 3?
    
    Speaker: Richard Hawkings (CERN)
    
    ATLASIntroRH_20190604_v2.pdf
    
    ATLASIntroRH_20190604_v2.ppt
- 10:30
  
  coffe break
- Session 1b: Luminosity-determination methodology in Run 2 (part B)
  
  Convener: Richard Hawkings (CERN)
  - 4
    
    Overview of CMS luminosity-determination methodology in Run 2
    
    Global view of
    - calibration strategy: vdM, LSC, calibration transfer/non-linearity corrections, instrumental effects...)
    - long-term monitoring strategy (details & results thereof in talk on 2nd morning)
    - achieved systematic uncertainty on the luminosity, per year
    - where could we improve for Run 3?
    
    Speaker: Dr Moritz Guthoff (Deutsches Elektronen-Synchrotron (DE))
    
    CMS_luminosity_in_Run_2___Lumi_days_proceedings.pdf
    
    CMS_Run2_overview.pdf
  - 5
    
    Overview of ALICE luminosity-determination methodology in Run 2
    
    Global view of
    - calibration strategy: vdM, LSC, calibration transfer/non-linearity corrections, instrumental effects...)
    - long-term monitoring strategy (details & results thereof in talk on 2nd morning)
    - achieved systematic uncertainty on the luminosity, per year
    - where could we improve for Run 3?
    
    Speaker: Martino Gagliardi (Universita e INFN Torino (IT))
    
    Gagliardi_LumiDays_040619.pdf
    
    Gagliardi_LumiDays_040619.pptx
  - 6
    
    Overview of LHCb luminosity-determination methodology in Run 2
    
    Global view of
    - calibration strategy: vdM, LSC, calibration transfer/non-linearity corrections, instrumental effects...)
    - long-term monitoring strategy (details & results thereof in talk on 2nd morning)
    - achieved systematic uncertainty on the luminosity, per year
    - where could we improve for Run 3?
    
    Speaker: Vladislav Balagura (Centre National de la Recherche Scientifique (FR))
    
    bgi_video.gif
    
    bgi_video.mp4
    
    Overview_of_LHCb_luminosity_determination_methodology_in_Run_2_balagura.odp
    
    Overview_of_LHCb_luminosity_determination_methodology_in_Run_2_balagura.pdf
- 12:50
  
  lunch break
- Session 2a: Impact of accelerator instrumentation on vdM calibrations
  
  Convener: Georges Trad (CERN)
  - 7
    
    LHC beam current measurement: performance and issues in Run 2, prospects for Run 3
    
    Discuss the
    - BCT, FBCT, LDM, instruments performance in measuring the ghosts and satellites
    - use of BQM as current monitor for bunch by bunch fractions?
    - prospects for Run 3?
    
    Speaker: Marcus Palm (University of London (GB))
    
    LumiDays 2019_MPalm_LHC beam current measurement performance and issues.pdf
    
    LumiDays 2019_MPalm_LHC beam current measurement performance and issues.pptx
  - 8
    
    LHCb ghost-charge measurement & FBCT corrections
    
    Speakers: George Coombs (University of Glasgow (GB)), Rosen Matev (CERN)
    
    matev-lhcb-ghost-v2.pdf
  - 9
    
    LHC beam orbit & position measurement
    
    Discuss the
    - BPMs, DOROS instrument performance & issues in determining the beam orbit,
    - prospects for Run 3?
    
    Speaker: Marek Gasior (CERN)
    
    190604_BPMs.pdf
    
    190604_BPMs.pptx
  - 10
    
    LHC beam orbit and collision position determination & control – performance and issues, prospects for Run 3
    
    Discuss from the operations and machine point of view
    - orbit drifts in vdM and physics fills,
    - scan and x-ing angle precision
    - what would be different in Run 3?
    
    Speaker: Dr Jorg Wenninger (CERN)
    
    Orbit.LumiWS.June19.pdf
    
    Orbit.LumiWS.June19.pptx
  - 11
    
    Impact of orbit drifts & magnetic-hysteresis effects on vdM & length-scale calibrations
    
    • How experiments correct for orbit drifts
    • Hysterisis-related systematic uncertainties
    
    Speaker: Witold Kozanecki (University of Manchester (GB))
    
    OrbitPerturbtns_WK_4Jun19s.pdf
    
    OrbitPerturbtns_WK_4Jun19s.pptx
- 15:45
  
  tea break
- Session 2b: Non-Factorization biases in vdM calibration : sources and mitigation
  
  Convener: Witold Kozanecki (University of Manchester (GB))
  - 12
    
    Beam preparation for vdM scans in the injectors
    
    Discuss the
    - beam preparation methods developed in Run 2 for vdM beams,
    - achieved beam profile improvement
    - what would be different in Run 3 after LIU implementations?
    
    Speaker: Hannes Bartosik (CERN)
    
    2019.06.04_vdM_bunches_from_injectors.pdf
    
    2019.06.04_vdM_bunches_from_injectors.pptx
  - 13
    
    Non factorization in ATLAS & ALICE vdM scans: experience in Run 2, impact on luminosity calibration
    
    Speaker: Mateusz Dyndal (CERN)
    
    mdyndal_2019-06-05-lumiDays.pdf
    
    Proceedings
    
    proceedings_alice_atlas_nonfact.pdf
  - 14
    
    Non factorization in CMS vdM scans: experience in Run-2, impact on luminosity calibration
    
    Speaker: Joscha Knolle (Deutsches Elektronen-Synchrotron (DE))
    
    Fig4.gif
    
    JK_190604_cms_nonfactorization_v5.pdf
    
    JK_190604_proceedings_cms_factorization_bias.pdf
    
    Proceedings
  - 15
    
    Non factorization in LHCb vdM scans: experience in Run-2, impact on luminosity calibration
    
    Speaker: Vladislav Balagura (Centre National de la Recherche Scientifique (FR))
    
    Non_factorization_in_LHCb_2D_vdM_scans.pdf
Wednesday, 5 June
- Tue, 4 Jun
- Wed, 5 Jun
- Session 3a: Impact of beam-beam effects on vdM calibrations
  
  Convener: Yannis Papaphilippou (CERN)
  - 16
    
    Beam optics for vdM fills
    
    • Optics configurations, beta* @ 19/24 m, performance and precision reached
    
    Speakers: Hector Garcia Morales (University of Oxford), Rogelio Tomas Garcia (CERN)
    
    slides_VdM_OMC_LHC_lumi_days.pdf
  - 17
    
    Simulation of beam-beam effects in vdM scans: impact on precision
    
    Speaker: Vladislav Balagura (Centre National de la Recherche Scientifique (FR))
    
    beam_beam_balagura.pdf
    
    Published paper
  - 18
    
    Beam-beam simulations with COMBI & TRAIN in vdM fills
    
    Speaker: Dr Tatiana Pieloni (EPF Lausanne)
    
    Lumi_days_Pieloni.pdf
    
    Lumi_days_Pieloni.pptx
- 10:15
  
  coffee break
- Session 3b: Luminosity & Emittance in Physics (part A)
  
  Convener: Vladislav Balagura (Centre National de la Recherche Scientifique (FR))
  - 19
    
    Long-term monitoring of delivered luminosity & calibration stability in CMS
    
    • Monitoring & stability, of luminosity and associated calibrations in Run-II
    • Introduction to emittance-scans and data analysis
    
    Speaker: Olena Karacheban (CERN)
    
    LumiDays_workshop_Sability_NonLin_v5.pdf
    
    Proceedings_Long_term_monitoring_and_calibration_stability_v3.pdf
  - 20
    
    Long-term monitoring of delivered luminosity & calibration stability in ATLAS
    
    • Monitoring & stability, of luminosity and associated calibrations in Run-2
    • Emittance-scan analysis
    • ATLAS-CMS comparison on delivered luminosity and Z-counting
    
    Speaker: Valerie Lang (Deutsches Elektronen-Synchrotron (DE))
    
    LongTermStability_ATLAS_LHClumidays_VLang_05062019.pdf
    
    Proceedings
  - 21
    
    Long-term monitoring of delivered luminosity & calibration stability in LHCb
    
    • Monitoring & stability, of luminosity and associated calibrations in Run-2
    • Emittance-scan analysis
    
    Speaker: Rosen Matev (CERN)
    
    matev-lhcb-lumidays19-relative.pdf
- 12:05
  
  lunch break
- Session 4a: Luminosity & Emittance in Physics (part B)
  
  Convener: Jorg Wenninger (CERN)
  - 22
    
    Measurement of the beam emittances
    
    • Measurements, achieved precisions and issues, prospects for Run-3
    • Analysis of BSRT calibration fills
    
    Speaker: Enrico Bravin (CERN)
    
    Lumidays2019_EB.pdf
    
    Lumidays2019_EB.pptx
  - 23
    
    Understanding of the beam emittance evolution during SB
    
    • Close look at the emittance scans during SB – issues
    • Emittance evolution in SB from LHC instruments, and experimental data (conv emit, luminous region)
    
    Speaker: Olena Karacheban (CERN)
    
    LumiDays_workshop_EmittanceCMS_short_v6.pdf
    
    Proceedings_LumiDays_Emittance_CMS_WS_BSRT_corrected_FINAL.pdf
  - 24
    
    Longitudinal emittance in Run 2 and prospects for Run 3
    
    • Observations, beam profiles and impact to luminosity from the long-plane perspective.
    
    Speakers: Dominika Agnieszka Dlugosz (Lodz Technical University (PL)), Helga Timko (CERN)
    
    LHC-lumi-WS-RF.pdf
    
    LHC-lumi-WS-RF.pptx
  - 25
    
    Emittance evolution and Luminosity during the LHC cycle: from injection to stable beams
    
    • Emittance & luminosity evolution for different filling schemes & beam types in Run 2
    • Bunch by bunch fluctuations
    
    Speaker: Ilias Efthymiopoulos (CERN)
    
    atlas_blumi_evolution_6324.mp4
    
    atlas_blumi_evolution_7314.mp4
    
    ieLumiDays2019_EmitEvolution_05.06.2019.pdf
    
    ieLumiDays2019_EmitEvolution_05.06.2019.pptx
  - 26
    
    Modeling the LHC Luminosity
    
    Discuss the
    - the Luminosity model - benchmark in Run 2,
    - can we predict luminosity of a fill? online luminosity follow-up tools?
    - luminosity & beam lifetime in Run 2
    
    Speaker: Stefania Papadopoulou (CERN)
    
    LumiModel_LumiDays19_stef.pdf
- 15:15
  
  tea break
- Session 4b: Summary
  
  Convener: Ilias Efthymiopoulos (CERN)
  - 27
    
    Combination of luminosity uncertainties for the full Run-2 dataset: the ATLAS example
    
    Speaker: Richard Hawkings (CERN)
    
    ATLASCombRH_20190605_v1.pdf
    
    ATLASCombRH_20190605_v1.ppt
  - 28
    
    Summary – what we discussed and learned (Experiments)
    
    Speaker: David Stickland (Princeton University (US))
    
    Issues Arising Lumi Days-3.pdf
  - 29
    
    Summary – what we discussed and learned (accelerator)
    
    Speaker: Guido Sterbini (CERN)
    
    Summary_GS.pdf
    
    Summary_GS.pptx
  - 30
    
    Closure