FACET

Andrei Seryi

FACET Project Manager 2009 SLUO Annual Meeting - September 17th 2009

What is FACET

* * * * Facility for Advanced Accelerator Experimental Tests FACET will provide short, intense pulses of e- and e+ to study plasma wakefield acceleration FACET scope includes beamlines in Sector 20, a new arm of the chicane in Sector 10 and a generic experimental area FACET will also allow a vast range of experiments for variety of science applications A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 2

DOE Mission and FACET

* * * * DOE Office of Science – advance basic research and the instruments of science that are the foundations for technology innovation, and a source for remarkable insights into our physical and biological world and the nature of matter and energy High Energy Physics – understanding how universe works at its most fundamental level – to enable these discoveries, supports theoretical and experimental research in elementary particle physics & fundamental accelerator science & technology Plasma wakefield acceleration, with its potential for a 1000-fold or more increase in acceleration gradient, is one of the most promising approaches for dramatic reduction of the size and cost of future accelerators, particularly high-energy electron-positron colliders – Mission Need Statement for an Advanced Plasma Accelerator Facility was signed by Dr. Raymond Orbach, Under Secretary for Science, on January 28, 2008 and Critical Decision 0 was approved on February 27, 2008 Facility for Advanced Accelerator Experimental Tests – provides short, intense pulses of e- and e+ to study a variety of critical issues associated with plasma acceleration – meet the mission need statement for Advanced Plasma Acceleration Facility A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 3

Project Overview

* * * * * FACET is ARRA funded MIE project which includes – new Beamline System in Sector 20 – additional arm of Bunch Compressor in Sector 10 – generic Experimental Area Key Performance Parameters for CD4 validation – allow timely transition to science required parameters Project team in place & proceeding with project execution Project is well defined and design is mature – Estimated cost range: $14.5-16.0M (TPC) – Baseline target: $14.5M of available ARRA funds – Project schedule: 24.5 months DOE CD1 review July 30-31: committee recommended CD1 approval – ESAAB meeting approved CD-1 on Sep 10, 2009 A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 4

Project team and collaborations

* * * Project team at SLAC: – J.Amann, K.Bane, L.Bentson, D.Blankenship, E.Carrone, J.Chan, R.Chestnut, S.DeBarger, F.-J.Decker, A.DeLira, R.Erickson, C.Hast, M.J.Hogan, B.Ilinets, R.Iverson, J.Keller, J.Kenny, J.Krebs, N.Li, J.J.Lipari, D.B.MacFarlane, S.Mao, P.Miller, Y.Nosochkov, T.O.Raubenheimer, P.Rodriguez, M.Santana, J.T.Seeman, A.Seryi, H.Shin, R.Singh, C.Spencer, J.Vollaire, D.Walz, W.Wittmer, M.Woodley, G.Yocky Science collaborations in place: – PWFA: • Joshi Group @ UCLA (20+ years PWFA & LWFA plasma physics) • Mori Group@ UCLA (Advanced computation/simulation) • Muggli Group @ USC (Experimental plasma physics) I am grateful to M.Hogan, • Katsouleas Group @ Duke (Plasma theory) L.Bentson, W.Wittmer, – DWA: Y.Nosochkov, S.Mao, J.Vollaire, J.Stohr, et al. for • Rosenzweig Group @ UCLA (DWA theory & experiments) providing materials and • Euclid Tech (Advanced materials) slides for this presentation – Solid state, THz, magnetism • Stöhr/Siegmann Groups at SLAC (Solid state physics) Expecting (and encouraging!) additional collaborations to form A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 5

FACET goals

* Unique properties of SLAC e+ and e- beams (high energy, ultra-short, high charge) give worldwide unique science opportunities for variety of fields: – e- and e+ plasma acceleration as primary goal – Plasma lens for compact focusing – Bent crystal for beam collimation or photon source – Dielectric wakefield acceleration – Generation of THz radiation for materials studies A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 6

Scope of work & Operation modes

Sector 20 Sector 10

Existing e- chicane Focal point e- (or e+) compressor chicane & FF New e+ chicane *

Operation modes that FACET Project will provide:

–

electrons

to Sector 20 Experimental Area • (After construction of Sector 20 chicane. Completed first.) (CD-4A) –

positrons

to Sector 20 Experimental Area • (After construction of Sector 10 e+ arm of chicane.) (CD-4B) • (Polarity of S20 chicane will be switched, to provide the e+ mode) – After a future upgrade (not in the Project scope) may also have both e- and e+, simultaneously delivered to Sector 20 A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 7

FACET parameters for Science

Energy Charge per pulse Pulse length at IP (  z ) Typical spot size at IP (  x,y ) Repetition rate 23 GeV current with full compression and maximum peak 2 x 10 10 (3 nC) compression e or e + per pulse with full 25  m with 4 % FW momentum spread with full compression and 40  m with 1.5 % FW momentum spread with partial compression 10 to 20  m 30 Hz Momentum spread 4 % FW with full compression; <0.5 % FW without compression * * Project deliverables: Key Performance Parameters (KPP) for CD-4A (& B): – Electron (Positron) Energy – Electron (Positron) Charge 23 GeV > 1 nano Coulomb KPP allow validation of new beamlines and timely transition to science parameters A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 8

Org: DOE-SSO-SLAC

DOE-SC / Office of High Energy Physics

Dennis Kovar, Director (Acquisition Executive) LK Len, FACET Program Manager

DOE-SLAC Site Office

Paul Golan, Manager Hanley Lee, FACET Federal Project Director

SLAC National Accelerator Laboratory

Persis Drell, Director David MacFarlane, PPA Director Andrei Seryi, FACET Project Manager A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 9

FACET Org chart

Channel for proposal submission for FACET (being formed)

SLAC / PPA Experimental Program Advisory Committee Particle Physics And Astrophysics

MacFarlane, David

Associate Laboratory Director AD / LCLS Interface Acc. Directorate

Knutson, Dale Seeman, John

ALD Dept. ALD Experimental Community Advisory Boards

PMOG

Project Manager

Seryi, Andrei

Deputy Project Manager

Krebs, Jim

Project Safety

Kenny, Joe

Sector-0-20 Division

Wienands, Uli 1.1

Financial

Alva, Rafael, Byrne, Rob

Procurement

King, Jerry

Administration

Meyers, Jill

Special Assistant

Hast, Carsten

Project control

J.Chan, R.Singh

Experimental Area

Hogan, Mark 1.3

Common Systems & Accelerator Integration

Wittmer, Walter 1.5

Beamline Systems & Engineering Integration

1.2

Bentson, Lynn 1.4

LCLS Interfaces Engineering, Acc. physics. Area Mngrs.

A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 10

FACET Schedule Overview

1 2 FY09 2009 3 4 5 pre-CD1 6 7 float CD1 8 9 10 11 12 u adv. procur.

2010 1 2 FY10 3 4 5 6 7 8 9 10 11 12 1 2 FY11 3 4 2011 5 6 7 8 9 10 11 12 2012 1 2 FY12 3 4 5 6 7 8 9 10 11 12 Pilot science experiments start early-mid 2011 CD1-to-2/3 CD2/3 u fabricate fabricate Anticipate 4 month/year beam runs finish e+ fabric.

external: s20 wall u installation validation & verification e Science program: 5 years after CD4B Legend: u u float milestone external milestone CD4A finish s10 inst.

u validation & verification e+ CD4B u A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 11

New stair case in S19

View of beamlines

* Sector 20 – Bunch compressor, final focus, experimental area and beam dump Sector 10 bunch compressor Experimental area, instrumentation and dump ~30 meters for experiments A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 12

Optics design

and optics modifications in Linac

New positron chicane in Sector-10 and focusing adjustment Focusing adjustment in Sector-19 and in e+ production line New optics in Sector-20: chicane, Final Focus and experiment line

A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 13

Bunch length compression in Linac

Bunch compression is achieved through manipulation of beam energy spread and bunch length along the Linac using momentum compaction of bending systems and optimization of RF accelerating phase.

DR Sec-10 Sec-20 Illustration of bunch length compression along the Linac

A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 14

Generate two bunches by selectively collimating during bunch compression process

Exploit Position-Time Correlation on e bunch to create separate drive and witness bunch

Adjust final compression Disperse the beam in energy z [mm] x [mm] ...selectively collimate A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 15

Chicane optics in Sector-20

* * * Requires R 56 = 4 mm for final compression of bunch length Chicane optics is compatible with “sailboat chicane” upgrade The upgrade e+ chicane is designed for 52.7 mm longer path length to correctly position the drive (e-) and witness (e+) bunches in wakefield plasma experiment

Shared linac e e+ R 56 = 4 mm,

D

s = 52.7 mm sailboat chicane e+ upgrade e+ R 56 e = 4 mm e Shared FF IP



x

h

= = 0



y 64 m

A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 16

Sailboat Chicane Upgrade will enable full exploration of plasma acceleration of e + in e wakes • • • • Extract e- & e+ from damping rings on same linac pulse Accelerate bunches to sector 20 5cm apart Use ‘Sailboat Chicane’ to put them within 100µm at entrance to plasma Large beam loading of e with high charge e + wakes beams e + Focal Point: D z = -0.1mm

RF D z = 5 cm e + e A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 17 z (m)

Beam sizes at FACET IP

* DIMAD tracking simulation * Initial longitudinal beam spread from LiTrack simulation.

* IP sizes (  x =13.6,  y =8.8,  z =19.9  m) are within the FACET goal.

X Y dE/E Z

A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 18

LCLS and FACET

FACET LCLS FACET LCLS

Sector 20 Wall A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 19 SDMP

Worst case: 16 W loss on SDMP

0.5 mrem/h

< 0.5 mrem/h at target height * The shield wall adequately protects the FACET area A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 20

FACET Access

A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 21

FACET beam dump design

* * * Copper and tungsten dump, surrounded by steel and borated poly shielding Additional shutter to reduce the residual dose rate in the experiment Ensures negligible dose outside the tunnel and low dose in the experimental area Solid Edge Design FLUKA Implementation A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 22

Control system

*

Control system approach: hybrid solution

– Use the LINAC basically as is, on a legacy system – Implement the renewed Sector 20 in EPICS, with very minor exceptions in both cases – LCLS has dealt with the hybrid issue and we are able to draw from this experience and use established solutions.

A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 23

Facility for Advanced Accelerator Experimental Tests

Unique properties of SLAC e+ and e- beams (ultra-short, high charge) provide worldwide unique opportunities for accelerator research at FACET e e + Focal Point: D z = -0.1mm

RF e + D z = 5 cm e “Sailboat” dual chicane will give unique opportunity to study acceleration of positrons by an electron bunch Two electron bunches formed by notch collimator will allow study energy doubling, high efficiency acceleration, emittance preservation Short bunches and their Tera-Hz radiation open new possibilities to study ultrafast magnetization switching Unique science opportunities for variety of fields: e- and e+ plasma acceleration as primary goal Plasma lens for compact focusing Bent crystal for beam collimation or photon source Dielectric wakefield acceleration Generation of THz radiation for materials studies

Summary

* * * * * FACET will be a new test facility at SLAC – First science experiments: early-mid 2011 Unique beams – 23 GeV, high current (~20KA), small spots (~10  m) Will enable reach science – e- and e+ plasma acceleration – Plasma focusing – Bent crystal as photon source – Dielectric wakefield acceleration – THz radiation for materials studies, etc – Many other experimental opportunities Vast range of possible applications Many opportunities for existing collaborations to grow and for new collaborations to form A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 25