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ATF and ATF-II Advanced Accelerator Concepts

ATF and ATF-II Advanced Accelerator Concepts. Ilan Ben-Zvi. ATF Overview. “ATF, the Stewardship program’s flagship facility” (J. Siegrist, addressing HEPAP, March 2014). P roposal-driven, Program Committee reviewed for academia, laboratories and industry since 1992 .

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ATF and ATF-II Advanced Accelerator Concepts

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  1. ATF and ATF-IIAdvanced Accelerator Concepts Ilan Ben-Zvi

  2. ATF Overview • “ATF, the Stewardship program’s flagship facility” (J. Siegrist, addressing HEPAP, March 2014). • Proposal-driven, Program Committee reviewed for academia, laboratories and industry since 1992. • Featuring a high-brightness 80-MeV linac, a Terawatt picosecond CO2 laser (100TW coming up), and a rich variety of experimental tools. • Providing highly trained staff in service of the users. • Work force development: • During the lifetime of the ATF, 37 students from 18 universities have received a graduate degree based on their work at the ATF. • 10 students from 5 universities are progressing towards achieving their Ph.D. degrees. • New Stony Brook graduate class in hands-on accelerator physics • An extremely cost effective, high-impact AST facility • ATF II upgrade Stage 1 in progress. Small staff, huge experience A lot of tools for the users!

  3. ATF 2015 Experiments • AE37- An X-band, traveling wave, deflection mode cavity for ultra-fast beam manipulation. Spokesperson: A. Murokh, Radiabeam (2007) • AE39– DWA - High Gradient, high field dielectric wakefield acceleration experiments at the ATF. Spokesperson: J. Rosenzweig, UCLA (2010) • AE41 – RUBICON - 220 MeV/m -130 MeV energy gain helical IFEL experiment at BNL. Spokesperson: P. Musumeci, UCLA(2009) • AE43 - PWFA Holography. Spokesperson: M. Downer/P. Muggli (2009) • AE45 - Advanced imaging and ultra-fast material probing with inverse Compton scattering. Spokesperson: M. Carpinelli, INFN (2009) • AE48 - Experimental study of electron-beam microbunching dynamics. Spokesperson: A. Gover, Tel-Aviv U. (2010) • AE50 - Plasma Wakefields in the Quasi-Nonlinear Regime. Spokesperson: J. Rosenzweig/S. Barber, UCLA (2012) • AE52 - Beam Manipulation by Self-Wakefield at the ATF. Spokesperson: S. Antipov/A. Kanareikin (2012)

  4. ATF 2015 Experiments (continued) • AF58 - ERL BPM Test. Spokesperson: R. Michnoff, BNL (C-AD), feasibility study • AE59 - Inverse Compton Source for Extreme Ultraviolet Lithography. Spokesperson: A. Murokh, Radiabeam (2013) • AE60 - Ultrafast High-Brightness Electron Source. Spokesperson: J. Park, Advanced energy systems (2012) • AE62 - Sub-femtosecond beam line diagnostics. G. Andonian, UCLA (2014) • AE63 - Stony Brook Accelerator Laboratory Course, CASE@ATF. Litvinenko, Stony Brook (2014) • AE64 - Surface Wave Accelerator and Radiation Source Based on Silicon Carbide, U. Tex., Principle Investigator: G. Shvets • AE65 - NOCIBUR: an inverse free electron laser decelerator experiment, UCLA (2014), Principle Investigator: P. Musumeci • AE66 - Modification of Gas Jet Density Profile with Hydrodynamic Shocks for CO2 Laser Ion Acceleration Experiment, NRL and Imperial College (2014), Principle Investigator: A. Ting

  5. ATF 2015 Experiments (continued) • AE67 - Space Radiation Effects Experiments, NASA (2014), Principle Investigator: Wousik Kim • AE68 - Ramped Beam Generation Using Dielectric Wakefield Structures, RadiaBeam (2014), Principle Investigator: G. Andonian • AF69 - Key physics study of LPI with NCD plasma using laser machined plasma structure, Tsinghua Univ., China (2014), Principle Investigator: Wei Lu, feasibility study • AE70 - Nonlinear Inverse Compton Scattering, UCLA, Tokyo Un., (2014), Principle Investigator: J. Rosenzweig • AE71 - CO2-laser-driven GeV wakefield accelerators with external injection, SUNY SB, UCLA, Un. Texas in Austin, Tsinghua Univ. (2014), Principle Investigator: V. Litvinenko

  6. Outstanding science from ATF’s user experiments Published in 2014: • PRL- Planar-Dielectric-Wakefield Accelerator Structure Using Bragg- Reflector Boundaries (RadiaBeam Technologies, LLC.) • PRL - Experimental Demonstration of Energy-Chirp Compensation by a Tunable Dielectric-Based Structure (Euclid Techlabs) • PRL - Seeding of Self-Modulation Instability of a Long Electron Bunch in a Plasma (USC, Max Plank, UCLA) • Nature Comm. - High-Quality Electron Beams from a Helical Inverse Free-Electron Laser Accelerator (UCLA) Fresh, not yet published: • New advances in nonlinear Compton scattering : observation of 3-rd order harmonic and mass shift effect with a Bragg spectrometer (UCLA) • Establishing quasi-nonlinear PWFA regime by observation of beam self-focusing by the solenoid-like field of the blown out plasma (UCLA) • Shaping plasma density profiles with acoustic blast waves to control ion beam quality from a gas jet target irradiated by a CO2 laser (Imperial College, NRL)

  7. Science highlights published in 2014 by ATF’s user experiments “High-quality Electron Beams from a Helical Inverse Free-electron Laser Accelerator” Nature Communications 5, 4928 “Planar-Dielectric-Wakefield Accelerator Structure Using Bragg-Reflector Boundaries” PhysRevLett. 113, 264801 no laser with laser 50MeV 95MeV “Experimental Demonstration of Energy-Chirp Compensation by a Tunable Dielectric-Based Structure” PhysRevLett.112, 114801 “Seeding of Self-Modulation Instability of a Long Electron Bunch in a Plasma” PhysRevLett.112, 045001

  8. New, not published yet results from ATF’s user experiments obtained in 2014 Advances in nonlinear Compton scattering studies Quasi nonlinear plasma wakefield acceleration Better control over CO2 laser-driven ion-beams Simulation and single shot filtered image of 3rd harmonic in inverse Compton scattering A novel technique was implemented for shaping over-dense gas jet density profile by acoustic blast waves. These waves are produced using a CO2 laser pre-pulse or independent solid state laser. This resulted in better control over proton- and helium- beams generated from shock acceleration. Two single shot Bragg spectra demonstrate relativistic red shift Direct confirmation of plasma blowout is obtained by the observation of matching the focused electron beam to the solenoid like focusing field of the blown out under-dense plasma. 3J 1.5J

  9. List of Current User Institutions(total 19, as listed in proposal documentation)

  10. Some statistics User Institutions by category Experiments by beam type use

  11. ATF Summary • The ATF is a uniquely equipped user facility with an impressive track record of service to HEP missions and Accelerator Stewardship. • The science case for the ATF upgrade offers • Unique laser based acceleration capabilities • Unique combination of synchronized electron and laser beams • Opens up many new science opportunities • Potential collaboration: IHEP participation in user driven experiments.

  12. ATF-II Proposal, October 2013 New vistas in advanced accelerator concepts and Stewardship

  13. ATF II upgrade ATF 5,000sf, single Hall 80 MeV, 1 TW ATF II 15,000sf, 3 Halls 150 (500) MeV 100 TW

  14. ATF-II: Enormous science reach,unique capabilities, high throughput • ATF-II construction in Building 912. • ATF maintains operations in building 820. • ATF-II will triple the space and triple the number of experiment halls. • Approved Phase 1 will double the electron beam energy, increase the CO2 laser power by a factor of 100, and nearly double the user turn-around time. • The science reach of the facility increases dramatically.

  15. Tremendous increase in the science reach 16 out of 25 proposed and future experiments benefit from 500 MeV

  16. We held an ATF-II Workshop

  17. ATF II beam performance Three independent experimental halls E=150 MeV Space for double chicane bunch compressor and future energy upgrade 150MeV, 1700 amp, 10 fsec, s~5 mm Multiple IP and experimental stations. Beam size progressively decrease to 5 micron 1700 amp 10 fsec s~5 mm This is already twice better than FACET beam in current density: “FACET provides high energy density electron and positron beams with peak currents of approximately 20 kA that are focused down to below 30x30 micron transverse spot size...”

  18. Summary Critical Path Environmental Room Procurement 02-Mar-15 09-Nov-15 Outfit Environment Room 10-Nov-15 24-Dec-15 Install Lasers 28-Dec-15 19-Feb-16 Install Components 22-Feb-16 26-May-17 Set Up and Commissioning Linac 7-Dec-16 07-Feb-17 Set Up and Commissioning Experimental Hall #1 8-Feb-17 20-Sep-17 Set Up and Commissioning Experimental Hall #2 21-Sep-18 4-Apr-18

  19. ATF-II Staffing • 10 FTE support ATFnow. • Extra 2 FTE were requested to support higher throughput of user experiments’ in double the number of exp. halls. • Extra 2 FTE will be needed to service 100TW laser and higher demand and complexity of user experiments. • 0.5 FTE to cover NUF reporting load

  20. ATF-II instrumentation design

  21. CO2 laser upgrade

  22. ATF-II CO2 100 TW Upgrade CPA Compr. Laser / e-beam interaction Femto-sec Compr. Regen 6-meter long final amplifier CPA Stretch. OPA Ion acceleration 25

  23. Recent Accomplishment • OPA routine operations. Laser power at 2TW. • Major systems under procurement • World’s 1st demonstration of CPA in a CO2 laser!

  24. Summary, ATF-II • The BNL ATF accelerator R&D program is rich, broad and well balanced. • Opportunity for collaboration: We can use IHEP help in supply of certain components and in commissioning the RF and accelerator systems.

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