FACET-II Science Workshop 2017

Date: 17 - 20 Oct, 2017
Location: Kavli Auditorium, SLAC

FACET-II is a new user facility that will provide unique capabilities to develop advanced acceleration and coherent radiation techniques with high-energy electron and positron beams. FACET-II provides a major upgrade over current FACET capabilities and the breadth of the potential research program will make it truly unique.

A baseline design for FACET-II has been established that progressively increases capabilities in three distinct stages and is captured in the FACET-II CDR and TDR​. Stage one completes a new photoinjector at Sector 10 and re-establishes operations with high-energy high-brightness electron beams. Stage two will add a new positron damping ring system and allow user runs with high-current positron beams. Stage three will upgrade the chicane in sector 20 for simultaneous delivery of positrons and electrons to the experimental area.

By offering bunch charge ranging from pC to nC, emittance from nm to microns, electrons and positrons, single and double bunches, tailored current profiles of up to nearly 100kA and energy up to 10GeV FACET-II provides experimental capabilities unparalleled anywhere in the world. By leveraging the additional infrastructure afforded by SLAC’s laser group, the FACET laser systems provide multi-terawatt peak powers with state of the art synchronization approaching 10fs.

The FACET-II team is organizing the third of a series of workshops to discuss the scientific opportunities of this new facility, and refine the technical requirements to ensure maximum impact during early operations and into the future. The focus of the current workshop is to asses and chart the development of key technologies needed to to execute the envisioned FACET-II science program.

Registration (closed)

AGENDA & PARTICIPANT LIST


Start TimeSession TopicPresentationPresenterAffiliation
09:00 amOverviewWorkshop IntroductionMark HoganSLAC
09:15 amOverviewFACET-II Project UpdateVitaly YakimenkoSLAC
09:45 amOverviewFACET-II Capabilities: e-, e+,
 two-bunches, sailboat: extreme
 peak current, non-neutral 
fireballs etc
Glen WhiteSLAC
10:30 am Coffee Break  
11:00 amOverviewHigh Level Summary of 
Anticipated Experimental
 Program @ FACET-II
Mark HoganSLAC
11:30 amEmittance preservation
 & pump depletion
Energy doubling with 
emittance preservation
 and pump depletion
Chan JoshiUCLA
12:15 pm Lunch  
01:15 pmEmittance preservation
 & pump depletion
Plasma sources with
 density ramps (Li oven + 
apertured controlled gas
 pressure)
Ken MarshUCLA
01:45 pmEmittance preservation
 & pump depletion
Differential pumping: 
IP integration & performance
Christine ClarkeSLAC
02:15 pmEmittance preservation
 & pump depletion
Plasma source with optically 
generated density ramps
Mike LitosUC Boulder
02:45 pmEmittance preservation 
& pump depletion
Emittance measurements:
 Butterfly technique and
 implications for spectrometer
Brendan O'SheaSLAC
03:15 pm Coffee Break  
03:30 pmEmittance preservation 
& pump depletion
FACET-II diagnostics 
overview
Nate LipkovitzSLAC
04:00 pmEmittance preservation 
& pump depletion
Novel diagnostics and 
beam phase space recovery
Claudio EmmaSLAC
04:30 pmEmittance preservation 
& pump depletion
Expected beam performance
 with stability analysis
Glen WhiteSLAC
05:00 pmEmittance preservation 
& pump depletion
Benefits of a zig-zag 
compression design for
 FACET-II
Yichao JingBNL
05:30 pmEmittance preservation
 & pump depletion
Discussion  
06:00 pm Adjourn  
Start TimeSession TopicPresentationPresenterAffiliation
09:00 amTransverse Wakefields 
with strong beam loading
Emittance vs Loading 
(introduction, theory with high 
level simulation results)
Sergei 
Nageitsev
FNAL
09:30 amTransverse Wakefields
 with strong beam loading
Theoretical progress 
(multi-modal analysis)
Xinlu XuUCLA/SLAC
10:00 amTransverse Wakefields 
with strong beam loading
Detailed computational 
discussion and next steps
 in understanding emittance 
vs. loading in PWFA
Weiming AnUCLA
10:30 am Coffee Break  
11:00 amTransverse Wakefields
 with strong beam loading
Lessons learned from 
FACET and path forward 
for FACET-II experiment
(offset knobs & what we will 
see on spectrometer)
Erik AdliU. Oslo
11:30 amTransverse Wakefields 
with strong beam loading
Diagnostic requirements 
for witness bunch offsets (r,z)
Mike LitosUC Boulder
12:00 pmTransverse Wakefields
 with strong beam loading
Calculation of wakefields for 
plasma-wakefield accelerators
Gennady 
Stupakov
SLAC
12:30 pm Lunch  
01:30 pmPositrons, hollow
 channels and dielectrics
Hollow channel longitudinal &
 transverse wakes
Carl Andreas 
Lindstrom
University of 
Oslo
02:00 pmPositrons, hollow
 channels and dielectrics
Dielectric Wakefield Accelerators:
status & what’s next
Gerard 
Andonian
UCLA
02:30 pmPositrons, hollow 
channels and dielectrics
Analysis of BBU in compact structure
-based wakefield accelerators and 
a suppression method
Stanislav
 Baturin
University of
 Chicago
03:00 pmPositrons, hollow 
channels and dielectrics
Saturation of the beam-hosing 
instability in quasi-linear plasma-
wakefield accelerators
Remi LeheLBNL
03:30 pm Coffee Break  
03:45 pmPositrons, hollow
 channels and dielectrics
Positron PWFA - what
 we’ve learned and what’s next
Sebastien
 Corde
Ecole 
Polytechnique
04:15 pmPositrons, hollow 
channels and dielectrics
Electron Driven Positron
 Acceleration with the 
Sailboat Chicane
Weiming AnUCLA
04:45 pmPositrons, hollow 
channels and dielectrics
Non-neutral fireball and 
possibilities for accelerating 
positrons with plasma
Jorge VieraIST
05:15 pmPositrons, hollow 
channels and dielectrics
Discussion  
06:00 pm Adjourn  
Start TimeSession TopicPresentationPresenterAffiliation
09:00 amInjection experimentsIonization injection -
 what we’ve learned and 
next steps
Navid VafaeiStonybrook 
University
09:30 amInjection experimentsDensity Downramp Injection
 - Prospects for Ultra-high 
Brightness Beams
Xinlu XuUCLA/SLAC
10:00 amInjection experimentsTrojan Horse and Plasma 
Torch Injection - lessons
 learned and next steps
Bernhard HiddingUniversity of 
Strathclyde
10:30 am Coffee Break  
11:00 amInjection experimentsPlans @ DESYJens OsterhoffDESY
11:30 amInjection experimentsLow emittance measurements
:100nm from betatron
 spectrum
Nathan MajernikUCLA
12:00 pmPlasma Accelerator
 based FELs
Status of task force effortsMark HoganSLAC
12:30 pm Lunch  
01:30 pmPlasma Accelerator
 based FELs
Realizing an FEL from 
a Plasma Accelerator -
 Progress and Plans at LBNL
Jeroen VanTillborgLBNL
02:00 pmIon MotionIon motion effects on 
emittance
Weiming AnUCLA
02:30 pmIon MotionIon motion effects on 
energy spread
Xinlu XuUCLA/SLAC
03:00 pm Coffee Break  
03:15 pmIon MotionEmittance preservation 
in plasma-based accelerators
 with ion motion
Carlo BenedettiLBNL
03:45 pmIon MotionLong term wake evolution: 
heating & ion wakes
Jorge VieraIST
04:15 pmIon MotionImaging of beam-induced 
plasma structures: FACET 
and FACET-II
Mike DownerUT Austin
04:45 pmIon MotionTeV/m in PlasmasJames RosenzweigUCLA
05:15 pmIon MotionDiscussions  
05:30 pm Adjourn  
06:00 pm Wine & Cheese Reception 
Building 52 Lobby
  
Start TimeSession TopicPresentationPresenterAffiliation
09:00 amSimulation CodesQuickPICWeiming AnUCLA
09:30 amSimulation CodesOSIRISWarren MoriUCLA
10:00 amSimulation CodesWarpX & ExascaleJean LucVayLBNL
10:30 am Coffee Break  
11:00 amSimulation CodesVSIMJohn CaryUC Boulder & 
TechX
11:30 amSimulation Codes8 Years of Beam-Driven 
Wakefield Simulation
-- ​​​​​lessons learned,
 reduced models, and
 future plans
David BruhwilerRadiasoft
12:00 pmNew Directions @
 FACET-II
Active plasma lenses –
 limitations on beam 
energy/density and aberrations
Jan-Hendrik 
Röckeman
DESY
12:30 pm Lunch  
01:30 pmNew Directions @ 
FACET-II
High Field QED enabled
 by 100TW + 15GeV
David ReisSLAC
02:00 pmNew Directions @
 FACET-II
High Fields: compressed 
10GeV+300MeV -> 100GeV/100GeV
Sebastian MeurenPrinceton 
University
02:30 pmNew Directions @ 
FACET-II
High Fields: computational 
challenges
Thomas GrismayerIST
03:00 pm Coffee Break  
03:15 pmNew Directions @
 FACET-II
Laser upgrade options: 
>100TW, transport and 
quality improvement
Alan FrySLAC
03:45 pmNew Directions @
 FACET-II
Laboratory Astrophysics 
studies with electron-
positron beams at FACET-II
Frederico FiuzaSLAC
04:15 pmNew Directions @ 
FACET-II
Material studies with
 compressed electron &
 positron beams at FACET-II
Ioan TudosaUniversity of 
Pennsylvania
04:45 pmNew Directions @
 FACET-II
Discussions  
05:15 pm Adjourn  
LAST NAMEFIRST NAMEAFFILIATION
AdliErikUniversity of Oslo
AllenJamesStanford University/SLAC
AnWeimingUCLA
AndonianGerardUCLA
BaturinStanislavThe University of Chicago
BaxevanisPanagiotis 
BenedettiCarloLawrence Berkeley National Laboratory
BlaclardGuillaumeLawrence Berkeley National Laboratory
BruhwilerDavidRadiaSoft LLC
CaryJohnUniversity of Colorado and Tech-X Corporation
ClarkeChristineSLAC
ClaytonChrisUCLA
CordeSebastienEcole Polytechnique
CowanBenjaminTech-X Corporation
D'ArcyRichardDESY
EmmaClaudioSLAC National Accelerator Laboratory
EnglandJoelSLAC
EsareyEricLBNL
FrischJosefSLAC
GreenSelinaSLAC
GrismayerThomasGoLP/Instituto de Plasmas e Fusao Nuclear, Universidade de Lisboa
HemsingErikSLAC
HigueraAdamUniversity of Colorado at Boulder
HoganMarkSLAC
HuangZhirongSLAC
JingYichaoBNL
JoshiChandrashekharUCLA
LeheRemiLBNL
LenLKDOE
LipkowitzNateSLAC
LitosMichaelUniversity of Colorado Boulder
LuWeiTsinghua University
MajernikNathanUCLA
MarshKennethUCLA EE Dept
MermingaLiaSLAC
MeurenSebastianDepartment of Astrophysical Sciences, Princeton University
MurokhAlexRadiaBeam Technologies, LLC.
NagaitsevSergeiFermilab/UChicago
NgCho-KuenSLAC National Accelerator Laboratory
O'SheaBrendanSLAC
OsterhoffJensDESY
PellegriniClaudioSLAC
PeskinMichaelSLAC
RaubenheimerTorSLAC
ReisDavidStanford PULSE Institue
RoeckemannJan-HendrikDESY
RosenzweigJamesUCLA
RyneRobertLBNL
SchroederCarlLBNL
SeemanJohnSLAC
SeryiAndreiJohn Adams Institute
SiciakAntoninEcole Polytechnique
StoreyDougUniversity of Victoria
StupakovGennadySLAC
SutherlandAndrewSLAC / University of Strathclyde
ThévenetMaxenceLawrence Berkeley National Laboratory
TudosaIoanUPenn
Vafaei-NajafabadiNavidStony Brook University
van TilborgJeroenLBNL
VayJean-LucLBNL
VieiraJorgeInstituto Superior Técnico
WalzDieterSLAC
XuXinluUCLA/SLAC
YakimenkoVitalySLAC
YockyJerrySLAC FACET-II
YuSiyiEcole Polytechnique
ZholentsAlexanderArgonne National Laboratory