1v1 Availability Tracking as a Means to Increase LHC Physics Production B. Todd 1, A. Apollonio 1 and L. Ponce 1 1 CERN – European Organisation for Nuclear Research, Switzerland

CERN Asset and Maintenance Management Workshop LHC and Injectors process, metrics Key Performance Indicators 2. Availability fault time, impact on physics 2012 experience, limitations 3. The Future cannot rigorously correlate impact on physics using current information: need to track faults … tracking faults, asset and maintenance management are all related inverse femtobarn is the LHC’s Key Performance Indicator … … a function of time in physics, faults, beam performance and turnaround time tracking faults gives a means to improve physics production … & machine understanding Outline

CERN Asset and Maintenance Management Workshop 2013 LHC and Injectors

CERN Asset and Maintenance Management Workshop 2013 CERN Accelerator Complex Lake Geneva Geneva Airport CERN LAB 1 (Switzerland) CERN LAB 2 (France)

CERN Asset and Maintenance Management Workshop 2013 CERN Accelerator Complex Lake Geneva Geneva Airport CERN LAB 1 (Switzerland) CERN LAB 2 (France) Proton Synchrotron (PS) Super Proton Synchrotron (SPS) Large Hadron Collider (LHC) 27km long 150m underground

CERN Asset and Maintenance Management Workshop 2013 CERN, the LHC and Machine Protection CERN 6 of 23 Accelerator Complex Large Hadron Collider (LHC) Beam-1 Transfer Line (TI2) Beam-2 Transfer Line (TI8) Beam Dumping Systems Super Proton Synchrotron (SPS) 100us for one turn,

CERN Asset and Maintenance Management Workshop 2013 CERN Accelerator Complex CMS ALICE ATLAS LHC-b

CERN Asset and Maintenance Management Workshop 2013 CERN Accelerator Complex CMS ALICE ATLAS LHC-b

CERN Asset and Maintenance Management Workshop 2013 Key Performance Indicators KPI of the LHC as a proton-physics machine = LS 1-2 ≈6.5 Year Peak Energy [TeV] 9 [1,2,3] 4.0 x x x ≈3 x Peak Intensity [p] 2.0 x x x ≈1 x Peak Luminosity [cm -2 s -1 ] <0.1 ≈5.3 ≈23.3 ? Integrated Luminosity [fb -1 ]

CERN Asset and Maintenance Management Workshop 2013 Integrated Luminosity Model 10 integrated luminosity is a function of… 1.time colliding physics beams 2.turnaround between successive physics beams 3.time to clear faults 4.physics performance during colliding beams machine understanding availability!

CERN Asset and Maintenance Management Workshop Availability

CERN Asset and Maintenance Management Workshop 2013 Post Mortem : Dump Cause – [5] 585 in total 12.7%  3.7%  22.8%  355  2010 in green

CERN Asset and Maintenance Management Workshop 2013 Post Mortem : Dump Cause – [5] dumps

CERN Asset and Maintenance Management Workshop 2013 Operations : Lost Physics & Fault Time 14 Lost Physics= stable beams cut short Fault Time = waiting to re-start + impact on physics:

CERN Asset and Maintenance Management Workshop 2013 Mean Stable End of Fill – [4]

CERN Asset and Maintenance Management Workshop 2013 Lost Physics 16 Average time in physics when reaching End of Fill = 9 hours … good turnaround = 3 hours if fill did not have 9 hours stable beams : dump cause is assigned up to 3 hours lost physics Lost Physics= stable beams cut short by faults

CERN Asset and Maintenance Management Workshop 2013 Operations : Lost Physics per Cause causes = 812h = 34 days [5] 812 hours lost physics

CERN Asset and Maintenance Management Workshop 2013 Fault Time 18 Fault Time= time to repair a faulty system

CERN Asset and Maintenance Management Workshop 2013 Operations : Fault Time per Cause 19 [6] 1524 hours = 64 days = fault time

CERN Asset and Maintenance Management Workshop 2013 Operations : Lost Physics + Fault Time 20 [5] 812 hours = 34 days = lost physics

CERN Asset and Maintenance Management Workshop 2013 Operations : Lost Physics + Fault Time 21 [5 + 6] 812 hours = 34 days = lost physics 1524 hours = 64 days = fault time

CERN Asset and Maintenance Management Workshop 2013 Past vs. Future

CERN Asset and Maintenance Management Workshop 2013 Limits of the 2012 Study information capture should be easier and rigorous… + tracking and understanding faults is inconsistent. 3. Information analysis should be easier… + better tools needed + Simple, easy to use 2. Dealing with parallel / hidden / dependent faults should be built in… + find one fault, fix it, find another, fix it, … etc… Availability Working Group investigating “cardiogram” visually reveals weaknesses of current methods

CERN Asset and Maintenance Management Workshop 2013 “LHC Cardiogram” – August energy beam-1 intensity beam-2 intensity stable beams = producing physics post-mortem = beam dump faults recorded LHC Cardiogram – a new way of seeing LHC availability

CERN Asset and Maintenance Management Workshop 2013 “LHC Cardiogram” – August energy beam-1 intensity beam-2 intensity stable beams = producing physics post-mortem = beam dump faults recorded LHC Cardiogram – a new way of seeing LHC availability

CERN Asset and Maintenance Management Workshop 2013 “LHC Cardiogram” – August LHC Cardiogram – a new way of seeing LHC availability

CERN Asset and Maintenance Management Workshop 2013 “LHC Cardiogram” – August LHC Cardiogram – a new way of seeing LHC availability conclusions based on 2012 study are weakened need consistent recording of fault information before looking for areas to improvement

CERN Asset and Maintenance Management Workshop 2013 In closing - I argue that… 28 … if we are serious about improving the physics-performance of LHC: 1.maximise the machine understanding and operator skill – OP’s business 2.track and analyse fault information to drive availability optimisation – all of our business LHC Availability Working Group is studying above hypothesis #2 Proposal for an LHC Systems Availability Tracker being developed part of an integrated event & asset management approach?

CERN Asset and Maintenance Management Workshop MPP CERN fin thank you!

CERN Asset and Maintenance Management Workshop 2013 References From the Chamonix Performance Workshop [1] 30 Extracted from [2] Extrapolated from W. Herr’s talk: “Luminosity Performance Reach After LS1” [3] Extracted from PM database and timber “STABLE BEAMS” flag[4] PM database Extracted from 1st March – 6th December 2012[5] Sort by MPS Dump Cause. Discard EOF, MD & MPS TEST[6]