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

FACET FACET Andrei Seryi

FACET Project Manager2009 SLUO Annual Meeting - September 17th 2009

Andrei SeryiFACET Project Manager

2009 SLUO Annual Meeting - September 17th 2009

A.Seryi, FACET -- 2009 SLUO Annual Meeting - September 17th 2009, page 2

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


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


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


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)• Katsouleas Group @ Duke (Plasma theory)

– DWA:• Rosenzweig Group @ UCLA (DWA theory & experiments)• Euclid Tech (Advanced materials)

– Solid state, THz, magnetism• Stöhr/Siegmann Groups at SLAC (Solid state physics)

* Expecting (and encouraging!) additional collaborations to form

I am grateful to M.Hogan, L.Bentson, W.Wittmer, Y.Nosochkov, S.Mao, J.Vollaire, J.Stohr, et al. for providing materials and slides for this presentation


* 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

FACET goals


Scope of work & Operation modes

* Operation modes that FACET Project will provide:– electrons to Sector 20 Experimental Area (CD-4A)

• (After construction of Sector 20 chicane. Completed first.)

– positrons to Sector 20 Experimental Area (CD-4B)• (After construction of Sector 10 e+ arm of chicane.)• (Polarity of S20 chicane will be switched, to provide the e+ mode)

– After a future upgrade (not in the Project scope) may also haveboth e- and e+, simultaneously delivered to Sector 20

Existing e- chicane

New e+ chicane

Sector 10

e- (or e+) compressor chicane & FF

Sector 20

Focal point


FACET parameters for Science

Energy 23 GeV with full compression and maximum peak current

Charge per pulse 2 x 1010 (3 nC) e- or e+ per pulse with full compression

Pulse length at IP (z) 25 m with 4 % FW momentum spread with full compression and 40 m with 1.5 % FW momentum spread with partial compression

Typical spot size at IP (x,y) 10 to 20 m

Repetition rate 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 23 GeV– Electron (Positron) Charge > 1 nano Coulomb

* KPP allow validation of new beamlines and timely transition to science parameters


DOE-SC / Office of High Energy PhysicsDennis Kovar, Director (Acquisition Executive)

LK Len, FACET Program Manager

DOE-SLAC Site OfficePaul Golan, Manager

Hanley Lee, FACET Federal Project Director

SLAC National Accelerator LaboratoryPersis Drell, Director

David MacFarlane, PPA DirectorAndrei Seryi, FACET Project Manager

Org: DOE-SSO-SLAC


Project ManagerSeryi, Andrei

Deputy Project ManagerKrebs, Jim

Project SafetyKenny, Joe Financial Alva, Rafael, Byrne, Rob

Procurement King, JerryAdministration Meyers, Jill

Special Assistant Hast, CarstenProject control J.Chan, R.Singh

Advisory Boards PMOG

Common Systems & Accelerator Integration

Wittmer, Walter

Beamline Systems & Engineering Integration

Bentson, Lynn

Experimental Area

Hogan, Mark

Particle Physics And AstrophysicsMacFarlane, David

Associate Laboratory Director

SLAC / PPAExperimental

Program Advisory Committee

ExperimentalCommunity

AD / LCLS InterfaceAcc. Directorate

Knutson, Dale ALDSeeman, John Dept. ALD

Sector-0-20 DivisionWienands, Uli

LCLS Interfaces Engineering, Acc. physics. Area Mngrs.

1.1

1.2

1.3 1.41.5

FACET Org chart

Channel for proposal submission for FACET (being formed)


FACET Schedule Overview

1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12

Legend:floatmilestoneexternal milestone

CD4A

uCD4B

uu

CD1

uCD2/3

uexternal: s20 wall

validation & verification e-

validation & verification e+

2009FY10 FY11

2010 2011

floatpre-CD1

u

FY09

installation

finish e+ fabric.

CD1-to-2/3

adv. procur.

fabricate

u

FY12

finish s10 inst.

fabricate

Pilot science experiments start early-mid 2011

Anticipate 4 month/year beam

runs

Science program: 5 years after

CD4B


View of beamlines

* Sector 20– Bunch compressor, final focus, experimental area

and beam dump

Sector 10 bunch compressor

New stair case in S19

Experimental area,instrumentation and dump~30 meters for experiments


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


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


Generate two bunches by selectively collimating during bunch compression process

Disperse the beam in energy

x [mm]

dp

/p [

%]

dp

/p [

%]

z [mm]

Adjust final compression

...selectively collimate

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

and witness bunchand witness bunch

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

and witness bunchand witness bunch


* Requires R56 = 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

Chicane optics in Sector-20

e-

e+

e-

e+e+ upgrade

e-

IP

R56 = 4 mm

R56 = 4 mm, s = 52.7 mm

Shared FFShared linac

64 m

x = y

= 0

sailboatchicane


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- wakes with high charge e+ beams

• 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- wakes with high charge e+ beams

e+

RF

z = 5 cme-

e+Focal Point: z = -0.1mm

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 Z

dE/E


LCLS and FACET

AB

C

D

E

Stairway

4

1

23

Wall

Wall

Linac

Wall

AB

C

D

EE

Stairway

4

1

23

Wall

Wall

Linac

Wall

Sector 20 Wall SDMPFACET

FACET

LCLS

LCLS


Worst case: 16 W loss on SDMP

< 0.5 mrem/h at target height

0.5 mrem/h

* The shield wall adequately protects the FACET area


FACET Access


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


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.

Unique properties of SLAC e+ and e- beams (ultra-short, high charge) provide worldwide unique opportunities for accelerator research at FACET

Short bunches and their Tera-Hz radiation open new possibilities to study ultrafast magnetization switching

e-

e+

RF

z = 5 cm

e-

e+ Focal Point: z = -0.1mm

Two electron bunches formed by notch collimator will allow study energy doubling, high efficiency acceleration, emittance preservation

“Sailboat” dual chicane will give unique opportunity to study acceleration of positrons by an electron bunch

Unique science opportunities for variety of fields: e- and e+ plasma acceleration as primary goalPlasma lens for compact focusingBent crystal for beam collimation or photon sourceDielectric wakefield accelerationGeneration of THz radiation for materials studies

Facility for Advanced Accelerator Experimental Tests


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 (~10m)

* 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

Documents

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