FACET. Andrei Seryi. FACET Project Manager

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

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

3 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 SLUO Annual Meeting - September 17th 2009, page 3

4 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: $ M (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 SLUO Annual Meeting - September 17th 2009, page 4

5 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 UCLA (20+ years PWFA & LWFA plasma physics) Mori Group@ UCLA (Advanced computation/simulation) Muggli USC (Experimental plasma physics) Katsouleas Duke (Plasma theory) DWA: Rosenzweig 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 A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 5

6 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 SLUO Annual Meeting - September 17th 2009, page 6

7 Scope of work & Operation modes Sector 10 Sector 20 Existing e- chicane Focal point New e+ chicane e- (or e+) compressor chicane & FF * 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 have both e- and e+, simultaneously delivered to Sector 20 A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 7

8 FACET parameters for Science Energy Charge per pulse Pulse length at IP (σ z ) Typical spot size at IP (σ x,y ) Repetition rate Momentum spread 23 GeV with full compression and maximum peak current 2 x (3 nc) e - or e + per pulse with full compression 25 μm with 4 % FW momentum spread with full compression and 40 μm with 1.5 % FW momentum spread with partial compression 10 to 20 μm 30 Hz 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 A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 8

9 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 SLUO Annual Meeting - September 17th 2009, page 9

10 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 ALD Seeman, John Dept. ALD Advisory Boards PMOG Project Manager Seryi, Andrei Deputy Project Manager Krebs, Jim Project Safety Kenny, Joe 1.1 Sector-0-20 Division Wienands, Uli Financial Alva, Rafael, Byrne, Rob Procurement King, Jerry Administration Meyers, Jill Special Assistant Hast, Carsten Project control J.Chan, R.Singh Experimental Community Experimental Area Hogan, Mark Common Systems & Accelerator Integration Beamline Systems & Engineering Integration Wittmer, Walter 1.5 Bentson, Lynn 1.4 LCLS Interfaces Engineering, Acc. physics. Area Mngrs. A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 10

11 FACET Schedule Overview Pilot science experiments start early-mid 2011 Anticipate 4 month/year beam runs Science program: 5 years after CD4B A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 11

12 View of beamlines New stair case in S19 * 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 SLUO Annual Meeting - September 17th 2009, page 12

13 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 SLUO Annual Meeting - September 17th 2009, page 13

14 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 SLUO Annual Meeting - September 17th 2009, page 14

15 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 dp/p [%] dp/p [%] z [mm] x [mm]...selectively collimate A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 15

16 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 R 56 = 4 mm, Δs = 52.7 mm Shared linac e+ e+ upgrade sailboat e+ chicane Shared FF IP e- e- R 56 = 4 mm 64 m e- σ x = σ y η = 0 A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 16

them within 100µm at entrance to plasma Large beam loading of e - wakes with high charge e + beams e + Focal

17 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 e + Focal Point: Δz = -0.1mm RF e + Δz = 5 cm A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 17 e - z (m)

8, σ z =19.9 μm) are within the FACET goal.

18 Beam sizes at FACET IP * DIMAD tracking simulation * Initial longitudinal beam spread from LiTrack simulation. de/e * IP sizes (σ x =13.6, σ y =8.8, σ z =19.9 μm) are within the FACET goal. X Y Z A.Seryi, FACET SLUO Annual Meeting - September 17th 2009, page 18

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

20 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 SLUO Annual Meeting - September 17th 2009, page 20

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

negligible dose outside the tunnel and low dose in the experimental area Solid Edge Design

22 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 SLUO Annual Meeting - September 17th 2009, page 22

cases LCLS has dealt with the hybrid issue and we are able to draw from this experience and

23 * Control system approach: hybrid solution Control system 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 SLUO Annual Meeting - September 17th 2009, page 23

Facility for Advanced Accelerator Experimental Tests Unique properties of SLAC e+ and e- beams

by an electron bunch e - Two electron bunches formed by notch collimator will allow study energy doubling,

possibilities to study ultrafast magnetization switching Unique science opportunities for variety of

24 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: Δz = -0.1mm RF e + Δz = 5 cm Sailboat dual chicane will give unique opportunity to study acceleration of positrons by an electron bunch e - 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

25 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 (~10μm) * 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 SLUO Annual Meeting - September 17th 2009, page 25

A Facility for Accelerator Physics and Test Beam Experiments

A Facility for Accelerator Physics and Test Beam Experiments Experimental Program Advisory Committee Roger Erickson for the SABER Design Team December 4, 2006 The Problem: FFTB is gone! The Final Focus