December 4, 2006 EPAC1 SLAC Overview and Future of Accelerator Science at SLAC Persis S. Drell...

December 4, 2006December 4, 2006 EPACEPAC 11

SLAC Overview and SLAC Overview and Future of Accelerator Future of Accelerator

Science at SLACScience at SLAC

Persis S. DrellPersis S. Drell

Deputy DirectorDeputy Director

SLACSLAC


OutlineOutline

SLAC Overview: An Evolving Laboratory SLAC Overview: An Evolving Laboratory Overview of Particle and Particle Overview of Particle and Particle

Astrophysics ProgramAstrophysics Program– Operating programOperating program– Vision Forward Post-BaBarVision Forward Post-BaBar

HEP Accelerator Operations Post B-HEP Accelerator Operations Post B-factoryfactory

Overview of Accelerator Research at Overview of Accelerator Research at SLACSLAC


SLAC: The Lab is ChangingSLAC: The Lab is Changing

SLAC’s research vision is evolving dramatically. SLAC’s research vision is evolving dramatically. – The balance and content of the scientific foci is The balance and content of the scientific foci is

changing in substantial ways changing in substantial ways Photon science is rapidly expanding Photon science is rapidly expanding

– In 2009, the major accelerator-based facilities will In 2009, the major accelerator-based facilities will both be primarily serving photon scienceboth be primarily serving photon science

Particle Physics and Particle Astrophysics Particle Physics and Particle Astrophysics – Will no longer have forefront accelerator based HEP Will no longer have forefront accelerator based HEP

program on site.program on site.– Will be serving user community at accelerator Will be serving user community at accelerator

facilities that will be off sitefacilities that will be off site e.g. ILC; LHCe.g. ILC; LHC

– A vibrant program of accelerator research will A vibrant program of accelerator research will continuecontinue

– Non-accelerator efforts will growNon-accelerator efforts will grow


Turn-on in 2009: LCLS will be the World’s First X-ray LaserLCLS: Linac Coherent Light LCLS: Linac Coherent Light SourceSource


Overview of Particle Overview of Particle Physics and Particle Physics and Particle

Astrophysics ProgramAstrophysics Program


B-Factory Physics ProgramB-Factory Physics Program

Highly constrained and redundant set of Highly constrained and redundant set of precision tests of weak interactions in the precision tests of weak interactions in the Standard ModelStandard Model– legacy of fundamental constraints on future New legacy of fundamental constraints on future New

Physics discoveriesPhysics discoveries Searches for physics beyond the Standard Searches for physics beyond the Standard

ModelModel– Sensitivity to New Physics at LHC mass scalesSensitivity to New Physics at LHC mass scales

B-factory program operates until end of FY2008B-factory program operates until end of FY2008– Final upgrades to machine and detector during FY06 Final upgrades to machine and detector during FY06

shutdownshutdown Ultimate goal: Deliver to BaBar: ~1ab-1 end of Ultimate goal: Deliver to BaBar: ~1ab-1 end of

FY2008FY2008 Laboratory committed to delivering luminosityLaboratory committed to delivering luminosity


Planning for FY09 TransitionPlanning for FY09 Transition

In FY09 the B-factory will stop operations; In FY09 the B-factory will stop operations; LCLS will start operationsLCLS will start operations– The challenge we face between now and 2009 The challenge we face between now and 2009

is the balance of the B-factory priorities with is the balance of the B-factory priorities with LCLSLCLS A focus of the B-factory operations review last springA focus of the B-factory operations review last spring

– We recognize this challenge and it is being We recognize this challenge and it is being actively and aggressively managedactively and aggressively managed

Transition planning well underwayTransition planning well underway– Led by PSD and Keith HodgsonLed by PSD and Keith Hodgson


Looking Forward: The Mission Looking Forward: The Mission for SLAC PPA Post BaBarfor SLAC PPA Post BaBar

Our scientific mission looking forward has three Our scientific mission looking forward has three major elements:major elements:– Accelerator based research at the energy frontierAccelerator based research at the energy frontier

ILC, LCD, ATLAS, Accelerator ResearchILC, LCD, ATLAS, Accelerator Research

– Investigations of Dark Matter and Dark Energy Investigations of Dark Matter and Dark Energy (non-accelerator)(non-accelerator) GLAST, LSST, JDEMGLAST, LSST, JDEM

– Investigations in neutrino physics to understand Investigations in neutrino physics to understand (a) what are the masses of the neutrinos and (b) (a) what are the masses of the neutrinos and (b) are neutrinos their own anti-particles?are neutrinos their own anti-particles? EXOEXO


Program Timelines: Exploiting Program Timelines: Exploiting the present and preparing for the present and preparing for

the futurethe future Science now or soonScience now or soon

– BaBar (ops to 2008, science to 2012?)BaBar (ops to 2008, science to 2012?)– GLAST (2007 – 2012/17)GLAST (2007 – 2012/17)– LHC: ATLAS & LARPLHC: ATLAS & LARP– Proof of principle experiments in accelerator researchProof of principle experiments in accelerator research

R&D for near term science (2012 and beyond)R&D for near term science (2012 and beyond)– ILC/LCD ILC/LCD – LSST LSST – EXO EXO – SNAPSNAP

R&D for farther futureR&D for farther future– High Gradient ProgramHigh Gradient Program– Accelerator ResearchAccelerator Research Focus of this EPAC


The Energy Frontier: ILCThe Energy Frontier: ILC The highest priority for the The highest priority for the

international field of particle physics is international field of particle physics is the full, direct exploration of the TeV the full, direct exploration of the TeV energy scale. energy scale. – with high probability new physics will be with high probability new physics will be

there there SLAC is committed to the ILCSLAC is committed to the ILC

– SLAC staff are broadly involved in all SLAC staff are broadly involved in all elements aspects of the ILC effortelements aspects of the ILC effort

– We are lagging behind Europe in detector We are lagging behind Europe in detector development due to lack of resourcesdevelopment due to lack of resources Some hope situation will improve in FY07Some hope situation will improve in FY07


The Energy Frontier: LHCThe Energy Frontier: LHC

SLAC Participation in LHCSLAC Participation in LHC– Participation in LHC Accelerator Research Participation in LHC Accelerator Research

Program (LARP)Program (LARP) Designing collimators for LHC/LHC UpgradesDesigning collimators for LHC/LHC Upgrades Will also support beam commissioningWill also support beam commissioning

– SLAC group accepted into ATLASSLAC group accepted into ATLAS Participation off to good startParticipation off to good start

– Attracting excellent postdocs and studentsAttracting excellent postdocs and students

– Won competition to host Tier 2 at SLACWon competition to host Tier 2 at SLAC Supported by all west coast ATLAS institutionsSupported by all west coast ATLAS institutions Partnering with UCSC and LBNL will have very strong Partnering with UCSC and LBNL will have very strong

west coast hub for ATLAS communitywest coast hub for ATLAS community


The Energy Frontier: The Energy Frontier: Accelerator ResearchAccelerator Research

Accelerator Research for Future Accelerator Research for Future MachinesMachines– High Gradient Studies for CLIC type machineHigh Gradient Studies for CLIC type machine– Development of L-band power sources for Development of L-band power sources for

ILCILC Proof of Principle Studies of New Proof of Principle Studies of New

Acceleration Acceleration Mechanisms:Mechanisms:– Plasma Acceleration ExperimentPlasma Acceleration Experiment

FFTBFFTBSABERSABER

– Laser AccelerationLaser Acceleration NLCTANLCTA


Particle Astrophysics and Particle Astrophysics and Cosmology and NeutrinosCosmology and Neutrinos

Gamma Ray Large Area Space Telescope (GLAST) Gamma Ray Large Area Space Telescope (GLAST) continues to march towards launchcontinues to march towards launch– Growing understanding of GLAST’s role in dark matter Growing understanding of GLAST’s role in dark matter

campaigncampaign Baltz, Battaglia and Peskin; Baltz, Battaglia and Peskin; hep-ph/0602187hep-ph/0602187

The Dark Universe, unknown to us until just The Dark Universe, unknown to us until just recently, is ours to explore recently, is ours to explore – Tremendous scientific opportunities with LSST and Tremendous scientific opportunities with LSST and

JDEM/SNAPJDEM/SNAP SLAC is the leader of the DOE-based effort in the LSST R&D. SLAC is the leader of the DOE-based effort in the LSST R&D. LBNL is the clear and highly competent leader of SNAP LBNL is the clear and highly competent leader of SNAP

concept and we have an important, well defined support roleconcept and we have an important, well defined support role Determining fundamental nature of neutrino Determining fundamental nature of neutrino

with search for with search for decay in decay in 136136Xe-->Xe-->136136BaBa++++ e e- - ee--

– EXO will go underground at WIPP in AprilEXO will go underground at WIPP in April


HEP Accelerator HEP Accelerator Operations Post B-Operations Post B-

factoryfactory


Program Assumptions for Program Assumptions for 20092009

LCLS OperationsLCLS Operations– Operations of 1/3 of linac (120 Hz operations) plus LCLS injector, Operations of 1/3 of linac (120 Hz operations) plus LCLS injector,

undulator and controls systemsundulator and controls systems

– Maintenance of full linacMaintenance of full linac

LCLS ConstructionLCLS Construction– Includes completion of project and planned start on expansion program Includes completion of project and planned start on expansion program

in FY09 (2in FY09 (2ndnd undulator) undulator)

PSD ProgramPSD Program– SSRL – SPEAR3 operations and scientific programsSSRL – SPEAR3 operations and scientific programs

– LCLS experimental science program LCLS experimental science program

PPA ProgramPPA Program– Particle and particle astrophysics scientific programsParticle and particle astrophysics scientific programs

– ILCILC Significant growth in ILC R&D assumedSignificant growth in ILC R&D assumed

– Operations of SABER and NLCTAOperations of SABER and NLCTA


Future Business ModelFuture Business Model BES Primary StewardshipBES Primary Stewardship

– BES Supports Linac Ops (1/3 of Linac)BES Supports Linac Ops (1/3 of Linac)– BES Supports Linac Maintenance (full Linac)BES Supports Linac Maintenance (full Linac)– BES covers org costs and direct program support costs BES covers org costs and direct program support costs

for Linac related accelerator operations: includes all for Linac related accelerator operations: includes all major technical infrastructure at the laboratory essential major technical infrastructure at the laboratory essential to accelerator operationsto accelerator operations

Klystron, CPE, CEF, Scientific Computing InfrastructureKlystron, CPE, CEF, Scientific Computing Infrastructure– HEP accelerator based programs (SABER, NLCTA, ILC) HEP accelerator based programs (SABER, NLCTA, ILC)

leverage off BES baseleverage off BES base Significant uncertainty in HEP use of core technical infrastructure Significant uncertainty in HEP use of core technical infrastructure

(i.e. ILC)(i.e. ILC) Success of LCLS cannot depend on future of HEP funding to these Success of LCLS cannot depend on future of HEP funding to these

departmentsdepartments HEP and BES share site-wide indirect costsHEP and BES share site-wide indirect costs This model is proposed so that operations support for LCLS This model is proposed so that operations support for LCLS

will not be dependent on future HEP programs (e.g. ILC)will not be dependent on future HEP programs (e.g. ILC)


Operations in 2009Operations in 2009 SLAC has defined its operating scenario for SLAC has defined its operating scenario for

FY09 and beyondFY09 and beyond– Detailed review by BES has endorsed the Detailed review by BES has endorsed the

proposed model and funding levelproposed model and funding level Budgeting and accounting structures in Budgeting and accounting structures in

place to manage the transition place to manage the transition – Will be able to respond to uncertain budget Will be able to respond to uncertain budget

scenariosscenarios The business model and funding level The business model and funding level

provides and opportunity for continued HEP provides and opportunity for continued HEP use of SLAC Linac for forefront accelerator use of SLAC Linac for forefront accelerator R&D for modest investmentR&D for modest investment


Overview of Overview of Accelerator Research Accelerator Research

at SLACat SLAC


Accelerator Research and Accelerator Research and Technology at SLACTechnology at SLAC

Long tradition of accelerator R&D working with Long tradition of accelerator R&D working with users to develop new technologies and machine users to develop new technologies and machine concepts needed to accomplish research goalsconcepts needed to accomplish research goals

Cross-cutting activity that spans entire labCross-cutting activity that spans entire lab Core competency of lab that benefits current and Core competency of lab that benefits current and

future operationsfuture operations Need organization and leadership that allows lab Need organization and leadership that allows lab

to capture cross-cutting opportunities in to capture cross-cutting opportunities in accelerator R&D that are central to future success accelerator R&D that are central to future success of lab and other Office of Science programsof lab and other Office of Science programs– Organization must be flexible and responsive to Organization must be flexible and responsive to

changing laboratorychanging laboratory


Accelerator Physics at SLAC: Accelerator Physics at SLAC: MissionMission

Operations of facilities & near term improvementsOperations of facilities & near term improvements– PEP-IIPEP-II– SPEAR3SPEAR3

Design, construction and commissioning of the next Design, construction and commissioning of the next generation of machines & their upgradesgeneration of machines & their upgrades– LCLSLCLS– ILCILC– LHC (LARP)LHC (LARP)– Future light sourcesFuture light sources

Development of new technologiesDevelopment of new technologies– Injector Test FacilityInjector Test Facility– Photocathode Gun DevelopmentPhotocathode Gun Development– High Gradient Acceleration TechnologiesHigh Gradient Acceleration Technologies

R&D in new acceleration mechanismsR&D in new acceleration mechanisms– To make future generations of machines feasible and affordableTo make future generations of machines feasible and affordable

Education of next generation of accelerator scientists and Education of next generation of accelerator scientists and engineersengineers


OrganizationOrganization Particle and Particle AstrophysicsParticle and Particle Astrophysics

– ILC DivisionILC Division– Accelerator Systems DivisionAccelerator Systems Division– Accelerator Research DivisionAccelerator Research Division

Beam Physics DepartmentBeam Physics Department Accelerator Technology Research DepartmentAccelerator Technology Research Department Advanced Computing DepartmentAdvanced Computing Department Advanced Accelerator Research DepartmentAdvanced Accelerator Research Department

Photon Science Photon Science – SSRL Accelerator Systems DepartmentSSRL Accelerator Systems Department

LCLSLCLS– Accelerator Physics GroupAccelerator Physics Group

OperationsOperations– KlystronKlystron– CPECPE– SMSSMS

Balance of effort between basic research and helping to solve problems of the ongoing and future programs (eg ILC, LCLS, B-factory)Technical

support coupled to other efforts


Human Resources--PPAHuman Resources--PPA

Adv Computation4%

Linac Op23%

ILC38%

Beam Physics11%

LCLS2%

Accel Technology9%

Adv Accel Research13%

~100 Accelerator Scientists including students and postdocs


Human Resources—Site Human Resources—Site WideWide

LCLS19%

PSD7%

PPA74%


Accelerator Research Accelerator Research ActivitiesActivities

Advanced Accelerator Research Department (AARD)--PPAAdvanced Accelerator Research Department (AARD)--PPA ○○ experimental research in high gradient accelerationexperimental research in high gradient acceleration ○○ microstructure design & fabrication microstructure design & fabrication ○○ dielectric wakefield acceleration dielectric wakefield acceleration ○○ beam-plasma physicsbeam-plasma physics ○○ laser driven dielectric structures laser driven dielectric structures ○○ high gradient plasma accelerationhigh gradient plasma acceleration ○○ beam diagnostics for femtosecond and attosecond beams beam diagnostics for femtosecond and attosecond beams

Advanced Technology Research Department (ATR)--PPAAdvanced Technology Research Department (ATR)--PPA ○ ○ high gradient structures and ultra high power RF sources and switching technologyhigh gradient structures and ultra high power RF sources and switching technology ○ ○ advanced accelerator conceptsadvanced accelerator concepts ○ novel FEL and light source technologies○ novel FEL and light source technologies ○ ○ superconducting materials researchsuperconducting materials research ○ advanced electronics for instrumentation, control, timing○ advanced electronics for instrumentation, control, timing

Advanced Computation Department (ACD)--PPAAdvanced Computation Department (ACD)--PPA ○ ○ CSR, micro-bunching calculationCSR, micro-bunching calculation ○ design/modeling of low-emittance rf photo-cathode gun○ design/modeling of low-emittance rf photo-cathode gun ○ ○ modeling code developmentmodeling code development ○ design and analysis of EM structures (e.g., RF deflector)○ design and analysis of EM structures (e.g., RF deflector) ○ ○ simulations of wakefields in undulator and impedances in vacuum chamberssimulations of wakefields in undulator and impedances in vacuum chambers

Beam Physics Department (BPD)--PPABeam Physics Department (BPD)--PPA ○ ○ CSR and its effectsCSR and its effects ○ accel optics theory, development and measurement○ accel optics theory, development and measurement ○ ○ FEL studiesFEL studies ○ lattice modeling code development (LEGO, BBI, Zlib, MIA)○ lattice modeling code development (LEGO, BBI, Zlib, MIA) ○ ○ impedance and wakefield studiesimpedance and wakefield studies ○ beam dynamics and phase space manipulations○ beam dynamics and phase space manipulations ○ ○ new light source conceptsnew light source concepts ○ compressor micro-bunching instability studies○ compressor micro-bunching instability studies



Accelerator Systems Division (ASD)--PPAAccelerator Systems Division (ASD)--PPA ○ ○ ring and linac lattice modeling and development ring and linac lattice modeling and development ○ beam dynamics○ beam dynamics ○ ○ electron cloud instability studieselectron cloud instability studies ○ I&C development○ I&C development ○ new ring concepts○ new ring concepts

Controls and Power Electronics Department (CPE)--OPSControls and Power Electronics Department (CPE)--OPS ○ ○ solid-state klystron modulatorssolid-state klystron modulators ○ high availability power supplies, pulsers and controls○ high availability power supplies, pulsers and controls ○ ○ intelligent diagnostic systemsintelligent diagnostic systems ○ future instrument standards for accelerators and ○ future instrument standards for accelerators and

detectorsdetectors ○ ○ advanced beam instrumentationadvanced beam instrumentation ○ signal processing and feedback system development ○ signal processing and feedback system development

International Linear Collider Division (ILC)-PPAInternational Linear Collider Division (ILC)-PPA ○ ○ high brightness injectorshigh brightness injectors ○ polarized electron and positron sources○ polarized electron and positron sources ○ ○ linac, damping ring and IP designlinac, damping ring and IP design ○ impedance, wakefield and EMI studies○ impedance, wakefield and EMI studies ○ ○ energy spectrometer developmentenergy spectrometer development ○ advanced accelerator technology and instrumentation○ advanced accelerator technology and instrumentation ○ ○ high power collimator development as part of LHC Accelerator Research Project (LARP)high power collimator development as part of LHC Accelerator Research Project (LARP)

Klystron Department (Kly)--OPSKlystron Department (Kly)--OPS ○ ○ rf power source developmentrf power source development ○ power sources and test facility for rf structures (incl. ○ power sources and test facility for rf structures (incl.

LCLS)LCLS) ○ ○ LLRF timing distribution/stabilizationLLRF timing distribution/stabilization ○ design support for beam diagnostics○ design support for beam diagnostics



LCLS Laser Group --LCLSLCLS Laser Group --LCLS ○ ○ laser techniques for improved gun performance (shaping, UV conversion, etc.)laser techniques for improved gun performance (shaping, UV conversion, etc.) ○ ○ laser, X-ray timing/synchronizationlaser, X-ray timing/synchronization ○ bunch control for shorter X-○ bunch control for shorter X-ray pulsesray pulses

LCLS Physics Group -LCLSLCLS Physics Group -LCLS ○ ○ FEL physics (SASE, seeding, etc.)FEL physics (SASE, seeding, etc.) ○ ultra-short beam production○ ultra-short beam production ○ timing synchronization○ timing synchronization ○ ○ photocathode guns and injectorphotocathode guns and injector ○ technologies for enhanced photon production○ technologies for enhanced photon production ○ ○ multi-bunch ops and fast switchingmulti-bunch ops and fast switching ○ fast start-to-end simulations, ○ fast start-to-end simulations, controls integrationcontrols integration

SSRL Accelerator Systems Department (SASD)--PSDSSRL Accelerator Systems Department (SASD)--PSD ○ ○ ring and ID modeling, developmentring and ID modeling, development ○ new lattice development○ new lattice development ○ ○ beam dynamics studiesbeam dynamics studies ○ ○ short bunch and timing modesshort bunch and timing modes ○ top-off injection○ top-off injection ○ I&C development○ I&C development ○ ○ future improvements (e.g., ERL) and new ring light source conceptsfuture improvements (e.g., ERL) and new ring light source concepts

Surface and Materials Science Department (SMS)--OPSSurface and Materials Science Department (SMS)--OPS ○ ○ R&D on photoemissive cathodesR&D on photoemissive cathodes ○ chamber finishes that suppress secondary electron emission○ chamber finishes that suppress secondary electron emission ○ ○ causes of breakdown-generating electron emission from materials in high-electric fieldscauses of breakdown-generating electron emission from materials in high-electric fields


Operations FacilitiesOperations Facilities LINAC: LINAC:

– 50 GeV e+ and e- 120 Hz at 2 x 1050 GeV e+ and e- 120 Hz at 2 x 101010

– Currently full linac operationed by HEPCurrently full linac operationed by HEP– 2009: Full linac maintained by BES; final 1/3 operated 2009: Full linac maintained by BES; final 1/3 operated

by BES, by BES, PEP-II: PEP-II:

– 3.1 GeV e+ injection up to 30 Hz at 1 x 103.1 GeV e+ injection up to 30 Hz at 1 x 101010

– 9.0 GeV e- injection up to 30 Hz at 1 x 109.0 GeV e- injection up to 30 Hz at 1 x 101010

SPEAR3 and injector: SPEAR3 and injector: – 3 GeV e- injection storage ring light source3 GeV e- injection storage ring light source

LCLS: LCLS: – 14.5 GeV e- up to 120 Hz at 4 x 1014.5 GeV e- up to 120 Hz at 4 x 1099

– Uses final 1/3 of linacUses final 1/3 of linac– First 2/3 of linac maintained for future upgrade optionsFirst 2/3 of linac maintained for future upgrade options


R&D FacilitiesR&D Facilities NLCTA & ESBNLCTA & ESB

– 300 MeV e- accelerator & RF Test stations300 MeV e- accelerator & RF Test stations– Moving from NLC research tool to research facility for accelerator Moving from NLC research tool to research facility for accelerator

researchresearch Evolution in management structureEvolution in management structure

SABERSABER– Relocation of FFTBRelocation of FFTB– 28 GeV low emittance e- and e+ beams for accelerator research28 GeV low emittance e- and e+ beams for accelerator research– Hope to start construction this year Hope to start construction this year – Uses first 2/3 of linac maintained by BES (SABER ops funded by Uses first 2/3 of linac maintained by BES (SABER ops funded by

HEP)HEP) ESAESA

– Excellent, large, instrumented crane covered spaceExcellent, large, instrumented crane covered space Still used for some test beamsStill used for some test beams

– Future site for ILC RF R&DFuture site for ILC RF R&D Accelerator Structure Test Area (ASTA)Accelerator Structure Test Area (ASTA)

– Test facility for gun development and high gradient researchTest facility for gun development and high gradient research Gun Test Facility (GTF at SSRL)Gun Test Facility (GTF at SSRL) Injector Test Facility (Proposed)Injector Test Facility (Proposed)


Current Issues Facing Current Issues Facing Accelerator ResearchAccelerator Research

SaberSaber– FundingFunding– OperationsOperations

NLCTANLCTA– Management changes going forwardManagement changes going forward– What is the research portfolio going What is the research portfolio going

forward?forward? ITFITF

– Proposal stage nowProposal stage now– Essential for future of LCLSEssential for future of LCLS


SABERSABER Spectacular results from final FFTB Spectacular results from final FFTB

runrun– Demonstrated 42GeV of acceleration Demonstrated 42GeV of acceleration

in 0.9m plasmain 0.9m plasma– Highest energy electrons ever made Highest energy electrons ever made

at SLACat SLAC SABER (FFTB replacement) in SABER (FFTB replacement) in

developmentdevelopment– In discussions with DOE about In discussions with DOE about

funding and timelinefunding and timeline– DOE review 12/6 & 7DOE review 12/6 & 7


NLCTANLCTA E163: Laser Acceleration at NLCTAE163: Laser Acceleration at NLCTA

– A series of experiments to demonstrate the physics and A series of experiments to demonstrate the physics and technical feasibility of laser accelerationtechnical feasibility of laser acceleration

Facilities are nearing completion, and await a final Facilities are nearing completion, and await a final Accelerator Readiness Review on December 18Accelerator Readiness Review on December 18thth

– E163 facilities include:E163 facilities include: A new single-pulse low-energy-spread electron source for A new single-pulse low-energy-spread electron source for

the NLCTAthe NLCTA A 10 GW ultrafast laser systemA 10 GW ultrafast laser system A new shielded experimental enclosure which can be A new shielded experimental enclosure which can be

accessed while the NLCTA runsaccessed while the NLCTA runs High Gradient Program at NLCTA and ASTA High Gradient Program at NLCTA and ASTA

– NLCTA: 3 RF stations, one Injector, Radiation shieldingNLCTA: 3 RF stations, one Injector, Radiation shielding System suitable for testing novel rf accelerator structures System suitable for testing novel rf accelerator structures

and waveguide structuresand waveguide structures Will move to management by ASD more suitable for Will move to management by ASD more suitable for

multi-user facilitymulti-user facility


Injector Test FacilityInjector Test Facility

““The electron gun is the critical enabling technology for advancing LINAC The electron gun is the critical enabling technology for advancing LINAC based light sources” BESAC 20-year facilities road mapbased light sources” BESAC 20-year facilities road map

Test facility needed to push parameters of beam brightnessTest facility needed to push parameters of beam brightness– Leads to shorter wavelength radiationLeads to shorter wavelength radiation– New science opportunitiesNew science opportunities

White paper identifies opportunities and costs for development of ITF at White paper identifies opportunities and costs for development of ITF at SLACSLAC

Challenges to be addressed in rf photocathode gun developmentChallenges to be addressed in rf photocathode gun development– Cathode developmentCathode development– Laser performanceLaser performance– Gun designGun design– Post-acceleration beam conditioningPost-acceleration beam conditioning– SimulationSimulation


SummarySummary

SLAC in time of transitionSLAC in time of transition– Changes from past Changes from past – Exciting opportunities for the future Exciting opportunities for the future

SLAC has defined its operating scenario for FY09 SLAC has defined its operating scenario for FY09 and beyondand beyond– Detailed review by BES has endorsed the proposed model Detailed review by BES has endorsed the proposed model

and funding leveland funding level Development of Accelerator Research Facilities for Development of Accelerator Research Facilities for

2009 and beyond well underway2009 and beyond well underway SABER and important element of continued rich and SABER and important element of continued rich and

diverse accelerator research program at the labdiverse accelerator research program at the lab– Mission broadening to include more focus on future photon Mission broadening to include more focus on future photon

science opportunitiesscience opportunities


Back-up SlidesBack-up Slides

December 4, 2006 EPAC 35

NLCTAE163: Laser Acceleration at the NLCTA

• A series of experiments to demonstrate the physics and technical feasibility of laser acceleration

• Facilities are nearing completion, and await a final Accelerator Readiness Review on December 18th

• E163 facilities include:– A new single-pulse low-energy-spread

electron source for the NLCTA– A 10 GW ultrafast laser system– A new shielded experimental enclosure which

can be accessed while the NLCTA runs

• E163 will operate with beam ~60 hrs/month over the next 2-3 years testing laser-driven accelerator structure prototypes made by lithographic and fiber-drawing techniques

• The E163 facilities offer sub-picosecond electron and laser beams which are available to the broader user community for advanced accelerator experiments


High Gradient Program at NLCTA• NLCTA (3 RF stations, one Injector, one Radiation shielding)

– Two 240ns pulse compressor, 300 MW peak, powered by two X-band 50 MW klystrons (used mainly for CERN and NLC type experiments)

– One 400/200 ns pulse compressor, 500 MW peak, powered by 2 X-band 50 MW klystrons (Modulator is in final stage of construction, hopefully operational early next year)

– 65 MeV injector with a 1 nC charge/bunch– Shielding enclosure suitable for up to 1 GeV– This system will be used to test novel rf accelerator structures and waveguide structures

Dualmode Resonant Delay lines ~30m

RF Input to the 2 50 MW klystrons

Single mode waveguide input to the pulse compression system; 100 MW/Line for 1.6 s

Dual mode waveguide carrying 100 MW

Compressed output > 500 MW 200 ns.

Output Load Tree

NLC experimental rf pulse compression

system


High Gradient Program at ASTA (Klystron Test Lab)

• The facility comprises:1. Two 50 MW klystrons that can be combined 2. A variable length pulse compressor that can produce up to 500 MW (under construction).3. When done (spring to summer of 2007) the facility will have the most agile RF system suitable

for fast turn around of experiments. • Programs intended for this facility:

1. Scan the material for RF accelerator structures using the single cell accelerator structure technology as vehicle for these studies.

2. Test Dielectric Accelerator structures in collaboration with ANL3. Test highly damped RF structures in collaboration with CERN and KEK4. Test superconducting materials and structures

• We started using ASTA and the Test lab facilities late this year. They are used for testing

1. Superconducting materials (we tested various samples of niobium and magnesium diboride)2. Single cell accelerator structures ( We tested our reusable universal couplers and our reference

traveling wave accelerator structure) 3. Dielectric accelerators in collaboration with ANL (test is under way for a quartz structure)


•Responsibility for successful operations of Linac related programs

•Currently PEP-II and other Linac programs•In 2009 will have responsibility for LCLS operations

•Moves to PSD in 2009

Accelerator Research becomes dual report to PSD and PPA by 2009

December 4, 2006 EPAC1 SLAC Overview and Future of Accelerator Science at SLAC Persis S. Drell...

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