Managing large projects that depend on new technology: the CERN...
Transcript of Managing large projects that depend on new technology: the CERN...
Managinglargeprojectsthatdependonnewtechnology:
theCERNapproach.
TomTaylorCERN
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Introduction- 1• CERNwasfoundedin1954toprovide:
Aworld-classlaboratoryinEuropeforhighenergyphysicsexperimentation
Thiswasthedeclaredintention…
ButalsoatthetimetherewasaseriousbraindrainofEuropeanscientiststotheUS,attractedby
– Betteropportunities fordoingresearch, better salaries
– CERNwouldprovideanalternativepoleofattraction
• Thenewlaboratorywouldprovideandmaintainfacilities
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Introduction- 2• Thefacilitieswouldbeparticleaccelerators
toreachthehighestpossibleenergies
– FirstacceleratorsatCERN:• Synchrocyclotron (SC)(1956)• Protonsynchrotron (PS)(1959)
– Theworld’sfirsthadroncollider:• Intersectingstoragerings(ISR)(1971)
– Thefollowingmainaccelerators• Superprotonsynchrotron (SPS)(1974)• p-pbar collider(SppS)(1984)• Largeelectronpositroncollider(LEP)(1987)• Largehadroncollider(LHC)(2008)
Fromthe1960stheaccelerators havebeenequalto,ormorepowerful than,equivalent facilitieselsewhere
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Introduction- 3
Howdidthishappen?– Succeedingmachinesmadebestuseofaccumulatedinfrastructure
– StimulationcamefromaconstantinterplaybetweenResearchandTechnology• Requirementsoftheexperimentspushedtechnicalinnovationintheaccelerators• Technicalinnovationenabledexperimentaliststoenvisionbetterexperiments
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Afewexamplesofnewtechnology• Magnetichorntoprovidedensebeamsof neutrinos• Developmentofstochasticcooling(alsotodensifybeams)• Productionandstudyofanti-particlesand anti-matter• Developmentofthetechnologyofultra-highvacuum• Pushingthelimits:superconductivityandcryogenics.• SuperconductingRFacceleration• Datahandlingandcommunications.WWWandgrid• Evolutionofdetectortechnology.:silicon,electronics• Largescaletechnologyforacceleratorsanddetectors– LHC“discoverymachine”
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TheEssentialInterplayBetweenResearchandTechnology
Aremany,andacollectionisdescribedinaforthcomingbookTechnologymeetsResearch
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examplesfromCERNof
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Howisallthis“managed”?Atamacroscopic, intellectual, level:• Apull comesfromthedesiretoconfirm(ordisprove)theoreticalmodels• Apush comesfromexploitation ofnewconceptstoincreaseandmakeavailable
evergreatercentre-of-massenergyoftheinteractionsproducedinthe laboratory
Withinthegeneralframework,newdevicesappear,andolderonesareimproved.• Detectortechnologyevolvestoprovideincreased sensitivity andaccuracy• Technologyofacceleratorcomponentsevolvestoprovideincreases ofinteraction
rate,energy,andavailability
AstrengthofCERNhasbeenthebuilding upofcompetenceinthecoretechnologiescoupledwiththe judicioususeofinfrastructureassociatedwiththesequence ofincreasingly powerfulmachines
This includedtheestablishment ofwell-equippedworkshops,staffedwithhighlyskilled technicalpersonnel (withwhomtechnical solutions canbediscussed), formakingmodels andprototypes,aswellasfacilities formakingurgentrepairs
ThenatureofCERNencourages discussion between appliedandresearchscientistsEriceInternationalSeminarsonPlanetaryEmergengies,49thSession,August2016l
ThenatureofCERN
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Guidingprinciple:minimizebureaucracy!
Short,easytocomprehend,CERNConvention (constitution) - 32pagesLayingoutthewaytheorganizationisrun(Wisdomofthefoundingfathers…)
• Understandthecommongoal(InthecaseofCERN)
1. pushingthefrontierofknowledgeofparticlephysics2. Maintainingandimprovingtheacceleratorstobetterachieve1.
• Loyaltytotheorganization
• Createtherightatmospherewhereideascanflowupfromthebottom
• Accepttotakeontasksthat increaseanddevelopcompetenceofstaff
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"TellmeandIforget.TeachmeandIremember.InvolvemeandIlearn."
- BenjaminFranklin
Thewayitisorganized• CERNCouncil– SciencePolicyCommittee– FinanceCommittee
• DirectorGeneral• Sectors,headedbydirectors– Acceleratorsandtechnical– Researchandcomputing– Administration
• Departments• Groups
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Generaladministration
• Clearpurchasingrules• Clearstaffrulesandregulations• Bureaucracydesignedtominimizeburdenonscientificandtechnicalstaff
• Administratorsencouragedtotakeinterestandprideintheresearchandtechnicalgoalsandachievements
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Staffing
• About2500staffmembers.Virtuallycapped.• Contractsinitially3years• Indefinitecontractsforselectedpersonnel– Createsloyalty.Membersconsiderthemselves“Cernois”beforetheiroriginalnationality.
– Createsanatmosphereofresponsibility.Equipmenthastoworkreliably– designformaintainability
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AcceleratorSector
• Classicalhierarchicalstructure,butorganizedinsuchawayastoallow(encourage)goodideastopermeateupandbeadopted
• Looselyorganizedcrossgroupanddepartmentteamsworkonlargeprojects
• Operationandmaintenanceofacceleratorsisaccordedprimeimportance
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Largeexperiments-1
• CERNprovidesthebeams,butcanaffordtofinanceonlypartoftheexperiments.– InthecaseoftheLHCabout20%.
• Experimentsarerunascollaborations basedonmemorandaofunderstanding(MoUs)
• AnMoUisnotalegallybindingcontractItisanagreementbased“honour”tosupplyequipmentatagenerallyacceptedvalue• Thisworks,butpresenceofCERNisimportant
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Largeexperiments-2
• CERNprovidestheframework– Officeandlaboratoryspace– Essentialtechnicalstaffforcoordination– Essentialadministrativestaff
• CERNmanagementadvisesonstrategicdecisions– Expertcommittees
• CERNCouncilhastoagree– Financecommittee
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Facingdifficulties
• Performarapidanalysisonthefailure• Presenttherecoveryplantoallconcernedinitsexecution.Giveeveryonethechancetoimproveit.Geteveryoneonboard
• Engagethoseinvolvedinsolvingthefinancialconsequences
• Handledproperly,difficultiescanimprovethedeterminationoftheteamtosucceed
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Technologytransfer
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Itisafactthatworkonacceleratorsanddetectors hasgenerated“useful”fallout,affectingeverydaylife.Thishasbeendocumented, anditdoesoffsetthehighcosttosocietyofthelargeinstallations.
Thishasmainlyhappenedthroughthepurchaseinindustryofequipmentbasedonnewconceptsordevelopments thathadbeenmodelled (andoftenprototyped)atCERNandthetransferofknowhowcamefromhelpingthecompanytofulfil thespecification. Manycompanies haveendorsedthisapproach.
Patentingwasnotpartofthemenu.
Fundingagencies nowexpectresearchorganizationstotakeoutpatents(unfortunately) .Thereturnsfromroyaltiesbarelycoverthecostofmaintaining atechnologytransfergroup,andthefilingofpatentsandthesecrecysurroundingthemusestimeandresources,anddetractsfromtheteambehaviour uponwhichsuccess depends.
CERNhasnotescaped thismovement.
(Arecentarticle intheEconomistwashighlycritical ofthewholeprocessofpatenting,citingfindingsfromserious studies thatsociety atlargedoesnotbenefit…)
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MaintaintheMagic• Appointrespectedscientistsasprojectleadersandcoordinators,abletoprovidetechnicalguidanceincaseofdifficulty
• Acknowledgeproductiveeffort• Encouragecooperationbetweendifferent“centres ofexcellence”
• Alwayskeepaneyeontheprimarygoal:avoidspendingtimeonnon-essentials
• Minimizethebureaucraticoverhead:gettheadministratorstoshareinthesenseofachievement,andimprovetheirefficiency.
• Reviewsshouldbefewandwellprepared.
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Examplesofbreakthroughs• Theoriginalplanwastobuilda10GeVweakfocusingsynchrotron.Design
studieswereinterrupted followingthepublicationbyCourantandSnyderofthetheoryofstrongfocusing.Thedesignwaschanged toa25GeVstrongfocusingsynchrotron. (Question:couldsuchaquickchangehappentoday?)
– Itrequiredveryprecisemagneticfield:->punchedlaminationsandpoleface windings– AccelerationandbeamextractionbroughtmanychallengestothePSteam->newideas
• Howtoproduceausablebeamofneutrinos? Beforedecayingintoelectronsandneutrinos, thekaonsandpionsproduced intheinteractionoftheenergeticprotonbeamwiththeprotonsinthetargetarefocusedusinganewdevice inventedatCERN:amagnetichorn
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Magnetichorn(S.vanderMeer,1961)
Toroidalfieldfocusesthepions/kaonsproducedinthetargetPower:12kVcapacitordischarge(200µspulseofupto400kA)Environment:highlevelofinducedradioactivity
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SchematiclayoutoftheneutrinosourceforbeamtoCNGS
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Thankstothemagnetichorn,theexperimentwiththeGargamellebubblechamber⇒ evidenceforneutralcurrents(1973)
AneutralcurrenteventinGargamelle.Theneutrinobeamentersfromtheleft.Allthreetracksfromthecollisionvertexundergoeitherverylargeanglescatteringorinteraction,provingthatnomuonisproduced.(photoCERN) EriceInternationalSeminarsonPlanetary
Emergengies,49thSession,August2016l
Pushthroughaudaciousproposals:e.g.IntersectingStorageRings(ISR)• Highercentre-of-mass energies areclearlypossibleifbeamsarecollided
head-on• ThiswasfirstpointedoutbyWideröe inthe1930s.Itwasnotpursued then
forfear thattheinteractionratewouldbetoolow• Successfulexperiments wereconductedwithbeamofelectrons intheUS,
ItalyandCERNinthe1960s• Protonswouldprovide farhigherenergyofinteraction:thiswasthegoalof
theISR– thefirsthadron collider.
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IntersectingStorageRings(ISR)• TheISRwastobethetestbedformanyoftheideastobe
exploitedlateron– Ultra-highvacuumtechnology– Applicationofsuperconductingmagnetsinanaccelerator– Method fordetermining luminosity(vanderMeerscan)– Romanpots– Gaseous detectors– Stochasticcooling– Precisioncalorimetry– 4π detector architecture
• BythistimeCERNhadbuiltupandtrainedstaffthatwasableandmotivatedtoinnovateonaevengranderscale
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Ultra-highvacuumtechnology
• MeasurementHowtomeasureUHV?State-of-the-art->notpossibleattherequiredlevelImprovedunderstanding->newdesign
• Cryogenicvacuumpumping
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Superconductinglow-betainsertion(toenhanceluminosity)
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1972.Practicalsuperconductivityyoung,butobviouslyimportant
Goodapplication:alow-betainsertion(toimproveluminosity)Alsotolearnabouthowtouseitforthefuture…
• Basicconceptsdeveloped.Mock-upsbuiltandtested• Understandingofmechanicalandelectricalconstraints• Understandingofcryogenicconstraints• Magnetsdesignedandorderedfromindustry
Magnetsintegratedintothecollider.Goodexperience!Teamtrainedforfutureapplications…
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CryogenicsfortheISRlow-betainsertion
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Multi-WireProportionalChamber(MWPC)G.Charpak,1968
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TheProton-AntiprotonCollider• SimonvanderMeerandcolleagueshadbeenexperimentingwith
stochasticcooling(anideaoriginatinginRussia)attheISR,anddevelopingamplifierswithsufficientbandwidth.Withthepossibilityofshrinkingthedimensionsofabeamofantiprotons,CarloRubbiaseizedupontheideatoproposeap-pbar colliderattheSPS.Thiswastobedone inparallelwiththeLEPeffort,asbeingafastwaytoestablish theexistenceoftheZandWbosonsthatwerebeingpredicted bythe“StandardModel”.Thiswouldnothavebeenpossiblewithoutthethoroughunderstandingofthetechnique, andthedevelopment ofthenecessary equipmentusingthelatestwide-band technology.TwolargeexperimentsweredesignedandinstalledintheSPS.
• Onceagain,theskillsavailableatCERNthankstotrainingwithpreviousprojects, togetherwiththeteamspirit,enabled theorganizationtorise totheoccasion.The finalresultwasthediscoveryofthebosons, leadingtotheNobelprizeforCarloRubbiaandSimonvanderMeer.
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StochasticCooling
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Principlea
Pick-upmeasureshorizontalerror.Kickercorrectsangle
Spacedby¼λβ (+½nλβ )
Repeat forverticalerror
Amplifiermustbe wideband
aSee“Stochasticcoolingforbeginners“ byD.MöhlEriceInternationalSeminarsonPlanetaryEmergengies,49thSession,August2016l
LargeHadronCollider(LHC)
• LEPtunnelwasexcavatedwiththeideaofeventuallyre-usingitforprotons
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SuperconductingdipolesPowerfulPreciseandPlenty
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13kAcable strand detail
Superconductingmagnettechnology
Acceptandimproveonideasfromotherlaboratories
RAL->Fermilab ->SCC->LHC
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Twinapertureconcept
BNL->CERN
HTScurrentleads
• Idea– Usenewtechnologytosavecryogenicpower
• Design,thenindustrializeprocess– Sothatanygoodmechanicalworkshopcantakeonthejob
–Morecompetitionreducescost
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HTSsectionofa13kAlead(0.5mlong).
JointbetweenHTSstacksandNb-Ti wires(leadingtothecoldbusbar system)
Complete 13kAHTScurrentlead(1.5mlong).
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Computingclustersanddatastorage
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Localareanetworks
WWW
MgB2 cableforcoldpowertransfer
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Magnesium diboride (MgB2)roundwirehasbeendeveloped inacollaborationwithindustry.Thiscanbecabledfortransferringmulti kAcurrentsforconnectingmagnetstodistantpowerconverters.WillbeusedfortheLHCluminosity upgrade.A20mlong,20kAcablehasbeentested.Thistypeofcableisbeingconsideredforuse incommercialpowertransmission.
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Thankyouforyourattention
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