Curriculum Vitae RESEARCH INTERESTS: WORK HISTORY:

Transcription

1 R. Joel England SLAC National Accelerator Laboratory 2575 Sand Hill Rd, Bld 41, Rm 144B Menlo Park, CA Voice: / Fax: england@slac.stanford.edu Curriculum Vitae RESEARCH INTERESTS: Ambitious and relevant scientific research in the field of accelerator physics, with particular emphasis on development and testing of novel beam dynamics and manipulation processes, beam diagnostics, and advanced accelerator concepts. WORK HISTORY: SLAC NATIONAL ACCELERATOR LAB MENLO PARK, CA Panofsky Fellow - Advanced Accelerator Research Department First demonstration of beam-driven TM mode excitation in photonic crystal structures for accelerator applications, using photonic crystal fibers. Experimental lead on efforts to demonstrate gradient and net acceleration in various photonic crystal structures being fabricated by students SLAC NATIONAL ACCELERATOR LAB MENLO PARK, CA Research Associate - Advanced Accelerator Research Department Postdoctoral research in the use of dielectric laser-driven structures for high-gradient acceleration, with focus on the use of air-hole photonic bandgap (PBG) fibers. Experimental efforts currently underway to transport a 60 MeV electron beam through the hollow core of a photonic bandgap fiber and spectrally analyze the resultant wakefield radiation for evidence of accelerating modes. Extensive beam studies and development of tools and diagnostics to help reduce final normalized emittance on the E163 beamline from over 100 µm to under 10 µm. Design, construction, and installation of a mover system and diagnostic mount with 40 nm resolution for precision positioning and alignment of micron-scale structures for optimal coupling to electron beams in vacuum. Design of a permanent-magnet final focus system for highgradient focusing of electron beams into fibers and other small accelerator structures. Simulation studies of advanced coupling schemes for the photonic bandgap fiber accelerator, including a 6-fold symmetric dielectric waveguide coupler, and development of computational techniques for calculating the coupling efficiency to a particular eigenmode.

2 UNIVERSITY OF CALIFORNIA LOS ANGELES, CA Graduate Student Researcher - Particle Beam Physics Laboratory Thesis Advisor: James Rosenzweig Graduate research centered on experimental verification of a proposed mechanism for generating linearly ramped highbrightness 12 MeV electron bunches suitable for use as a plasma wake-field drive beam. Theoretical work on plasma-based advanced accelerator concepts, including study of particle trapping at a transition in background plasma density. Design and construction of a sextupole-corrected dogleg beamline and associated hardware and diagnostics, for use as a negative longitudinal dispersion bunch compressor for tailored shaping of electron beams. Design and construction of a 9-cell X-band standing wave deflecting mode cavity and associated high-power RF and timing system for use as temporal electron bunch length diagnostic. Collaboration in experiments at the Pegasus laboratory to produce first experimental demonstration of uniformly filled low-emittance ellipsoidal bunches in a photoinjector using an ultrashort drive laser pulse. Management and coordination of various undergraduate and technical personnel, research and oversight of numerous precision machining and custom services, and the hands-on operation and maintenance of all accelerator subsystems. Electromagnet design work using RADIA and AMPERES. Upgrades to the UCLA version of the particle tracking code PARMELA. Extensive experience wth photoinjector and beamline modeling using PowerTrace, PARMELA, and ELEGANT. Development of a LabView-based control system for the Neptune accelerator beamline and its diagnostics. Experimental measurements of electron bunch length using coherent transition radiation (CTR) interferometry with a Martin- Puplett interferometer. Design and construction of an RF feedback system for automated correction of phase errors in the linear accelerator section due to temperature drift. Construction and installation of an autocorrelator for measuring the temporal duration of the picosecond drive laser pulses using noncolinear second harmonic generation in a nonlinear crystal. Design, construction, installation, and testing of copper and magnesium photocathodes. Maintenance and operation of all major subsystems of the UCLA Neptune linear accelerator laboratory, including: the drive laser, RF systems (S-Band microwave), video acquisition, vacuum systems, and CAMAC/GPIB-based control systems. Four years of experience as a beam operator.

3 2005 RADIABEAM, LLC LOS ANGELES, CA Scientific Consultant Feasibility study, design, and cold-testing of a prototype traveling wave X-band RF deflecting structure MARTIN SIMON LOS ANGELES, CA Scientific Consultant Magnetostatic simulation work on proprietary designs related to magnetic levitation STANFORD LINEAR ACCELERATOR LOS ANGELES, CA Consulting Collaborator Performed computer simulation studies of sextupole corrections in the NLCTA beamline for the ORION project at SLAC BROOKHAVEN NATIONAL LAB LOS ANGELES, CA Consulting Collaborator Performed computer simulation studies of sextupole corrections for the ATF beamline at BNL LIVERMORE NATIONAL LAB LOS ANGELES, CA Consulting Collaborator Designed and oversaw construction of a magnetic electron beam spectrometer and a pair of large dipole bend magnets for the PLEIDES project at LLNL UNIVERSITY OF CALIFORNIA LOS ANGELES, CA Teaching Assistant Conducted undergraduate study sessions and graded exams. Helped students with homework and exam preparation UNIVERSITY OF TEXAS AUSTIN, TX Laboratory Assistant - High Energy Physics Lab Designed system for precision alignment of photomultiplier tubes. Designed 3-axis LabView-based scanning system for sensitivity mapping of multi-channel photomultiplier tubes. Did feasibility study and initial testing of a technique for magneto-optic Kerr effect scanning near-field optical microscopy using a tapered fiber UNIVERSITY OF TEXAS AUSTIN, TX Teaching Assistant Instructed undergraduate laboratory. Prepared and graded all homework and exams.

4 EDUCATION: June 1997 UNIVERSITY OF TEXAS AUSTIN, TX B.S. in Physics - GPA: 3.7, Physics GPA: 3.8 March 2002 UNIVERSITY OF CALIFORNIA LOS ANGELES, CA M.S. in Physics - GPA: 4.0 September 2007 UNIVERSITY OF CALIFORNIA LOS ANGELES, CA PhD. in Physics - GPA: 4.0 PHD DISSERTATION: Longitudinal Shaping of Relativistic Electron Bunches Generated by an RF Photoinjector, University of California Los Angeles, Department of Physics and Astronomy, September AUXILLIARY EDUCATION & SHORT CLASSES: Collective Effects in Beam Dynamics, U. S. Particle Accelerator School, Albuquerque, NM, Summer "Fluorescent Markers: Usage and Optical System Configuration" and "Ultrafast Fiber Lasers," Photonics West, San Jose, CA, "Optical Alignment Mechanisms" and "Introduction to Ultrafast Technology," Photonics West, San Jose, CA, "An Introduction to Femtosecond Laser Techniques" and "Terahertz Wave Technology and Applications," Photonics West "Matlab and Accelerator Physics" and "CW & High Brightness Electron Sources," U.S. Particle Accelerator School, Madison, WI, Summer "Microwave Sources" and "RF Engineering and Signal Processing," U.S. Particle Accelerator School, Williamsburg, VA, Winter "Accelerator Physics," U.S. Particle Accelerator School, Baton Rouge, LA, Winter "Computational Methods in Electromagnetism," U.S. Particle Accelerator School, New Haven, CT, Summer TALKS GIVEN: Experiment to Demonstrate Acceleration in Optical Photonic Bandgap Structures, Invited Talk, Particle Accelerator Conference, New York, NY, Laser-Driven Dielectric Accelerators, Invited Talk, Workshop on 5th Generation Light Sources, Catalina, CA, Toward a Laser-Driven Dielectric Accelerator, Advanced Accelerator Concepts Workshop, Annapolis, MD, Photonic Bandgap Fiber Wakefield Experiment: Focusing and Instrumentation for Dielectric Laser Accelerators, Bob Siemann Symposium and ICFA Workshop, Menlo Park, CA, 2009.

5 "The E-163 Fiber Wakefield Experiment," Advanced Accelerator Concepts Workshop, Santa Cruz, CA, "Longitudinal Shaping of Relativistic Electron Bunches with Applications to the Plasma Wakefield Accelerator," Invited Talk, Advanced Accelerator Concepts Workshop, Santa Crux, CA, "Longitudinal Shaping and Diagnosis of Relativistic Electron Beams," Seminar at FarTech Inc, San Diego, CA, "Experiment to Measure Ramped Electron Bunches at the UCLA Neptune Laboratory Using a Transverse Deflecting Cavity," Advanced Accelerator Concepts Workshop, Lake Geneva, WI, "Beam Shaping and Permanent Magnet Quadrupole Focusing with Applications to the Plasma Wakefield Accelerator," Workshop on the Physics and Applications of High Brightness Electron Beams, Erice, Sicily, "UCLA Neptune Ramped Bunch Experiment," Advanced Accelerator Concepts Workshop, Stony Brook, NY, "UCLA Neptune 9-Cell Deflecting Cavity," ORION Collaboration Meeting, Stanford Linear Accelerator Center, "First and Second Order Optics in the ORION Dogleg," ORION Workshop, Stanford Linear Accelerator Center, Menlo Park, CA, "Beam Shaping and Compression Scheme for the UCLA Neptune Laboratory," Advanced Accelerator Concepts Workshop, Mandalay Beach, CA, "The Neptune S-Bahn R56 Compressor," Department of Energy Review, UCLA Dept. of Physics and Astronomy, Los Angeles, CA, COMMUNITY SERVICE: Member, Research Associate Selection Committee, SLAC-AARD Co-chair, Accelerator Session, Meeting of the American Physical Society Department of Particles and Fields, Member, Student Poster Award Selection Committee, PAC Reviewer, Small Business Innovation Research (SBIR) Program Member, Advanced Instrumentation Seminar Organizing Committee, SLAC PROFESSIONAL QUALIFICATIONS & SKILLS: Special theory knowledge: electric and magnetic field computation, electron beam transport matrix theory, plasma wakefield theory, general charged particle beam optics. General computing: Unix, LaTeX, LabView, Fortran, Mathematica, Matlab. Special computing: HFSS, Amperes, RADIA, Poisson, Parmela, PowerTrace, Elegant Hardware experience: high-power RF systems and structures, ultra-high vacuum, magnetostatic structures, charged particle beamline design and optimization, CAMAC and GPIB, timing and synchronization techniques, lasers and optics.

6 PUBLICATIONS: 1. R. J. England, E. R. Colby, R. Laouar, C. M. McGuinness, D. Mendez, C-K. Ng, J.S.T. Ng, R. J. Noble, E. Peralta, K. Soong, J. E. Spencer, D. Walz, Z. Wu, D. Xu, "Experiment to Demonstrate Acceleration in Optical Photonic Bandgap Structures," Proceedings of the 2011 Particle Accelerator Conference, New York, NY R. J. England, J. Frederico, M. J. Hogan, C. Joshi, W. An, W. Lu, W. Mori, "A High Transformer Ratio Plasma Wakefield Accelerator Scheme for FACET," Proceedings of the 2011 Particle Accelerator Conference, New York, NY C-K. Ng, R. J. England, L-Q. Lee, R. Noble, V. Rawat, J. Spencer, "Transmission and radiation of an accelerating mode in a photonic band-gap fiber," Phys. Rev. ST-AB 13, (2010). 4. R. J. England, C-K Ng, R. Noble, J. E. Spencer, "Calculation of Coupling Efficiencies for Laser-Driven Photonic Bandgap Structures," Proceedings of the 2010 Advanced Accelerator Concepts Workshop, Annapolis, MD R. J. England, J. Frederico, M. J. Hogan, P. Muggli, C. Joshi, "Drive Beam Shaping and Witness Bunch Generation for the Plasma Wakefield Accelerator," Proceedings of the 2010 Advanced Accelerator Concepts Workshop, Annapolis, MD R. J. England, E. R. Colby, C. M. McGuinness, R. Noble, R. H. Siemann, J. E. Spencer, D. Walz, Photonic Bandgap Fiber Wakefield Experiment at SLAC, Proceedings of the 2009 Particle Accelerator Conference, Vancouver, Canada C. M. S. Sears, E. Colby, R. J. England, R. Ischebeck, C. McGuinness, J. Nelson, R. Noble, R. H. Siemann, J. Spencer, D. Walz, T. Plettner, and R. L. Byer, Phase stable net acceleration of electrons from a two-stage optical accelerator, Phys. Rev. ST-AB 11, (2008). 8. R. J. England, E. R. Colby, R. Ischebeck, C. M. McGuinness, R. Noble, T. Plettner, C. M. S. Sears, R. H. Siemann, J. E. Spencer, D. Walz, Experiment to Detect Accelerating Modes in a Photonic Bandgap Fiber, Proceedings of the 13 th Advanced Accelerator Concepts Workshop, Santa Cruz, CA B. M. Cowan, R. L. Byer, E. Colby, R. J. England, C. McGuinness, R. J. Noble, T. Plettner, C. M. S. Sears, R. H. Siemann, J. E. Spencer, Optical Accelerator Structures, Proceedings of the 13 th Advanced Accelerator Concepts Workshop, Santa Cruz, CA R. J. England, J. B. Rosenzweig, and G. Travish, "Generation and Measurement of Relativistic Electron Buches Characterized by a Linearly Ramped Current Profile," Phys. Rev. Lett. 100, (2008). 11. P. Musumeci, J. T. Moody, R. J. England, J. B. Rosenzweig, T. Tran, Dynamically Self-optimized Beam Distributions at the UCLA Pegasus Laboratory: Linearity of Transverse and Longitudinal Phase Spaces, Nucl. Instr. Meth. Phys. Res. A. 593, 103 (2008).

7 12. P. Musumeci, J. T. Moody, R. J. England, J. B. Rosenzweig, T. Tran, Experimental Generation and Characterization of Uniformly Filled Ellipsoidal Electron-beam Distributions, Phys. Rev. Lett. 100, (2008). 13. J. B. Rosenzweig, A. M. Cook, M. Dunning, R. J. England, P. Musumeci, M. Bellaveglia, M. Boscolo, L. Catani, A. Cianchi, G. Di Pirro, M. Ferrario, D. Filippetto, G. Gatti, L. Palumbo, C. Vicario, S. Jones, Optimum electron bunch creation in a photoinjector using space-charge expansion, Proceedings of the 2007 Particle Accelerator Conference, Albuquerque NM (2007). 14. A. M. Cook, H. Badakov, R. J. England, J. B Rosenzweig, R. Tikhoplav, G. Travish, O. B. Williams, M. C. Thompson, A. Kanareykin, Beam-driven Dielectric Wakefield Accelerating Structure as a THz Radiation Source, Proceedings of the 2007 Particle Accelerator Conference, Albuquerque NM (2007). 15. J. B. Rosenzweig, A. M. Cook, R. J. England, M. Dunning, S. G. Anderson, M. Ferrario, Emittance compensation with dynamically optimized photoelectron beam profiles, Nucl. Instr. Meth. Phys. Res. A. 557, 87 (2006). 16. R. J. England, D. Alesini, B. O'Shea, J. B. Rosenzweig, and G. Travish, "Experiment to Measure Ramped Electron Bunches at the UCLA Neptune Laboratory Using a Transverse Deflecting Cavity," Proceedings of the 2006 Advanced Accelerator Concepts Workshop (2006). 17. R. J. England, B. O'Shea, J. B. Rosenzweig, G. Travish, and D. Alesini, "Commissioning of the UCLA Neptune X-Band Deflecting Cavity and Applications to Current Profile Measurement of Ramped Electron Bunches," Proceedings of the 2007 Particle Accelerator Conference (2007). 18. R. J. England, B. O'Shea, J. B. Rosenzweig, G. Travish, and D. Alesini, "X-Band Dipole Mode Deflecting Cavity for the UCLA Neptune Beamline," Proceedings of the 2005 Particle Accelerator Conference (2005). 19. S. G. Anderson, P. Musumeci, J. B. Rosenzweig, W. J. Brown, R. J. England, M. Ferrario, J. S. Jacob, M. C. Thompson, G. Travish, A. M. Tremaine, and R. Yoder, "Velocity bunching of high-brightness electron beams," Phys. Rev. ST-AB, 8: (2005). 20. R. J. England, J. B. Rosenzweig, G. Travish, A. Doyuran, O. Williams, B. O'Shea, and D. Alesini, "Beam Shaping and Permanent Magnet Quadrupole Focusing with Applications to the Plasma Wakefield Accelerator," Proceedings of the Workshop on High Brightness Beams in Erice, Sicily, R. J. England, J. B. Rosenzweig, G. Andonian, P. Musumeci, G. Travish, and R. Yoder, "Sextupole Correction of the Longitudinal Transport of Relativistic Beams in Dispersionless Translating Sections," Phys. Rev. ST-AB, 8:12801 (2005). 22. P. Musumeci, S. Tochitsky, S. Boucher, C. E. Clayton, A. Doyuran, R. J. England, C. Joshi, C. Pellegrini, J. E. Ralph, J. B. Rosenzweig, C. Sung, S. Tolmachev, G. Travish, A. A. Varfolomeev, A. A. Varfolomeev, T. Yarovoi, R. Yoder, "High energy gain of trapped

8 electrons in a tapered, diffraction-dominated inverse-free-electron laser," Phys. Rev. Lett., 94: (2005). 23. P. Musumeci, S. Tochitsky, S. Boucher, A. Doyuran, R. J. England, C. Joshi, C. Pellegrini, J. Ralph, J. B. Rosenzweig, C. Sung, S. Tolmachev, G. Travish, A. Varfolomeev, A. Varfolomeev Jr., T. Yarovoi, and R. Yoder, "Very high energy gain at the Neptune Inverse Free Electron Laser Experiment," AIP Conference Proceedings, no. 737, pp (2004). 24. R. J. England, D. Alesini, A. Doyuran, P. Musumeci, and J. B. Rosenzweig, "UCLA Neptune Ramped Electron Bunch Experiment," Proceedings of the Advanced Accelerator Concepts Workshop, pp (2004). 25. R. J. England, J. B. Rosenzweig, M. C. Thompson, "Longitudinal beam shaping and compression scheme for the UCLA Neptune Laboratory," AIP Conference Proceedings, no. 647, pp (2002). 26. P. Musumeci, R. J. England, M. C. Thompson, R. Yoder, and J. B. Rosenzweig, "Velocity bunching experiment at the Neptune Laboratory," AIP Conference Proceedings, no. 647, pp (2002). 27. R. J. England, P. Musumeci, R. Yoder, and J. B. Rosenzweig, "Beam Shaping and Compression Scheme for the UCLA Neptune Laboratory," Proceedings of the 2003 Particle Accelerator Conference, p (2003). 28. R. J. England, J. B. Rosenzweig, N. Barov, "Plasma electron fluid motion and wave breaking near a density transition," Phys. Rev. E. 66: (2002).