starting-up awake run 2 - indico · 2020. 5. 4. · giovanni zevi della porta, cern starting-up...
TRANSCRIPT
Starting-upAWAKERun2GiovanniZeviDellaPorta(CERN)
ABPGroupInformationMeeting-23April2020https://indico.cern.ch/event/910513/
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GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Introduction
• AWAKEteamjoinedBE-ABP-LATinJanuary2020• DetailedintroductionsatLATSectionmeetingonFebruary12• https://indico.cern.ch/event/887365/(12talks!)
• TodayIwillsummarize:• experimentalsetupandRun1results• maingoals/design/timelineofAWAKERun2• focusonruncoordinationanddataacquisitionplansforthemedium-term(2020/2021)
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GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Veryquickreminder:whatisAWAKE?
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GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Run1achievements,Run2goals
• RUN1:2016-2018:Proof-of-ConceptExperiment.Successfulelectronaccelerationinwakefielddrivenbyaself-modulatedprotonbeam.
• RUN2:2021-…:Accelerateelectronstohighenergies(~10GeV)whilepreservingthebeamqualityanddemonstratethescalabilityinordertohavefirsthighenergyphysicsapplicationsafterRun2.
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ElectronsacceleraYon:19MeVto2GeVProtonbeamself-modulaYon:micro-bunching@plasmafrequency
[plasmadensity]
[e- ene
rgy]
AWAKE
AWAKECollaboration,Nature561,363(2018)
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Run1achievements,Run2goals
• RUN1:2016-2018:Proof-of-ConceptExperiment.Successfulelectronaccelerationinwakefielddrivenbyaself-modulatedprotonbeam.
• RUN2:2021-…:Accelerateelectronstohighenergies(~10GeV)whilepreservingthebeamqualityanddemonstratethescalabilityinordertohavefirsthighenergyphysicsapplicationsafterRun2.
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ElectronsacceleraYon:19MeVto2GeVProtonbeamself-modulaYon:micro-bunching@plasmafrequency
[plasmadensity]
[e- ene
rgy]
AWAKE
AWAKECollaboration,Nature561,363(2018)
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beam
Laserdump
RF gun
Electron source system
20 MeVRF structure
Quadrupoles
Dipole
Dipole
Dipole
Imaging station 1
Imagingstation 2
OTR, CTR screens
Scintillatorscreen
Electronspectrometer
Proton beam
Electron beam
Run1experimentalsetup
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Howdoesitwork?1)LaserionizesRbvapor,formingaplasma2)Rbplasmacreatesmicro-bunchesintheprotonbeam3)Micro-bunchedprotonbeamexcitesplasmawakefields4)Wakefieldsaccelerateandfocuselectrons
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beam
Laserdump
RF gun
Electron source system
20 MeVRF structure
Quadrupoles
Dipole
Imaging station 1
Imagingstation 2
OTR, CTR screens
Scintillatorscreen
Electronspectrometer
Proton beam
Electron beam
Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beam
Laserdump
RF gun
Electron source system
20 MeVRF structure
Dipole
Dipole
Imaging station 1
OTR, CTR screensProton beam
Electron beam
Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beam
Laserdump
RF gun
Electron source system
20 MeVRF structure
Dipole
Dipole
Proton beam
Electron beam
Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beam
Laserdump
RF gun
Electron source system
20 MeVRF structure
Proton beam
Electron beam
Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beam
Laserdump
RF gun
Electron source system
20 MeVRF structure
Proton beam
Electron beam
Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beam
Laserdump
RF gun
Electron source system
20 MeVRF structure
Proton beam
Electron beam
NEW:higherenergy
NEW
NEW:back-propagating
NEW:densitystep~150MeV
Run2design(*)(**)
(*)simplified(**)workinprogress(needsstudies,simulations…)�7
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Motivatingthedesignchanges
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Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beamRF gun
Electron source system
20 MeVRF structure
Imaging station 1Proton beam
Electron beam
Rb flask
10 m Rb Plasma
RF gun
Electron source system
20 MeVRF structure
Electron beam
NEW:higherenergy
NEW
NEW:back-propagating
NEW:densitystep~150MeV
Electron bunch
Ionising laser pulse
Long proton bunch
Captured electrons
Proton microbunches
Accelerated electrons on the scintillator screen
Rb flask
10 m Rb Plasma
Laser beamRF gun
Electron source system
20 MeVRF structure
Dipole
Proton beam
Electron beam
NEW:higherenergy
NEW
NEW:back-propagating
NEW:densitystep~150MeV
• Newelectronbeam:~150MeV,~2mmmradε,~5μmσxy,~60μmσz• 1:Blowoutregime(e-density>>Rbdensity):linearfocusing,εpreservation• 2:Matche-beamtransversepropertiestotheplasma:preserveemittance• 3:Beamloading:tunethecharge/positionofe-beamtoreachsmallδE/E
• 2plasmacells:self-modulationandacceleration• Injecte-beamwhenprotonbeamisalreadyself-modulated(morestable)• Self-modulationcellequippedwithdensitystepstooptimizewakefieldgrowth
• Separatee-beaminthe1stcell• Electronseededself-modulation:seededmodulationisphase-stable,reproducible
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Run2timeline
• Full“CostandSchedule”reviewbythebeginningof2021• Preparingforthisreviewisthefocusofmostofthegroup
• Scheduledrivenbyengineeringchallenge:clearingareafrompreviousexperiment(CNGS)• Cost/person-power:cannotstartrightawaytodismantletheRun1setupandbuildthenewone• Continueexperiments,whiledetailsoftheworkareprepared(RP,cost,schedule,feasibility)
• PartoftheprogramcanalreadystartwithamodifiedRun1setup:• Run1(b):2020:runAWAKEwithoutprotonbeam• Run2(a):2021-22-…:runwithprotonbeam,onlystopwhenCNGSclearingcanstart
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electron-seededself-modulation
density-stepplasmacell
newdiagnostics 150MeVe-source/line(prototypeonthesurface)
clearoutCNGSarea
e-acceleration
2ndplasmacell,2ndionisinglaser
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Run1(b),2020:AWAKEwithoutprotonbeam
• Standaloneexperimentswithoutprotons• studylaser/plasmaande-/plasmainteractions
• ImproveexistingsetupbasedonexperiencefromRun1andnewideas• re-alignelectrongun,reducetiming-relatedRFjitter,improvespectrometerresolution,improvecontrolofe-beamtrajectory/focusing
• TestnewideasforRun2• axiconfocusingoflaser,machine-learningforbeamoptimization
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GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Run1(b),2020:runplan(pre-Covid19)
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Denseprogram,butalotofflexibilityinthe2ndpartoftheyearAWAKEis(hopefully)starting-upinnextweeks,sowemightstillpullitoff!
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Run2(a),2021:runwithprotonbeam
• AsignificantpartoftheRun2programcanbeset-upandtestedalreadyin2021
• Electronseededself-modulationinthefirstplasmacell• Predictedbysimulation,butnotyetfullyexploredindata(onlyasmall2018sample)• Largephase-spaceexplorationisnecessarytofindbestparameters• Requested12weeksofSPSbeam-time:mostlydedicatedtothis
• Newdiagnostics:severalnewideaswillmakeRun2possible• e-BPMsbasedoncoherentCherenkovdiffractionradiation(possiblyalsobunchlength)
• ResearchandteststakingplaceatCLEAR• Newspectrometercamerasystem(digitalcameraarray)anddataacquisition(BE-BI)• 3Dimagingofmodulatedpbunchwithstreakcameras(x/z+y/z—>x/y/z)
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GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
DataAcquisitionfor2020andbeyond
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• DAQmodelestablishedinAWAKERun1• Manydiagnostics:digitalcameras,BPMs,BTVs,spectrographs,laserenergy…• EventBuilderapplicationcollects/groupsthedatainto“events”and“runs”
• In2020,IwillworkonseveralDAQupgrades,neededfor2021• Digitalcamerasystemsynchronizationimprovements,andnewBE-BIdigitalcameraFESA• “Burstmode”:take10Hzdataforshortperiods• DataQuality:integratebasicDQintotheEventBuilder,toavoidtaking“baddata”
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
DataAcquisitionfor2020andbeyond
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• DAQmodelestablishedinAWAKERun1• Manydiagnostics:digitalcameras,BPMs,BTVs,spectrographs,laserenergy…• EventBuilderapplicationcollects/groupsthedatainto“events”and“runs”
• In2020,IwillworkonseveralDAQupgrades,neededfor2021• Digitalcamerasystemsynchronizationimprovements,andnewBE-BIdigitalcameraFESA• “Burstmode”:take10Hzdataforshortperiods• DataQuality:integratebasicDQintotheEventBuilder,toavoidtaking“baddata”
GiovanniZeviDellaPorta,CERN Starting-upAWAKERun2-ABPGroupInformationMeeting
Conclusions
• BuildonthesuccessofRun1,withveryambitiousgoalsforRun2• increasee-acceleration,andfocusonbeamqualityandscalability
• Run2includessignificantupgrades(newe-source,newplasmacell,newdiagnostics)andanengineeringchallenge(clearingex-CNGSarea)
• Run2hasseveralphases:• electronseeding,densitystep,facilitymodifications,prototyping,installation,electronacceleration
• Use2020-21tofocusonthefirstphases,basedonamodifiedRun1setup• Atthesametime,workondesign/prototyping/scheduleofthenextphases
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