Brian K. Spears
Physicist
Inertial Confinement Fusion, AX Division
Lawrence Livermore National Laboratory
Livermore, CA 945...
liquid shells enclosing compressible gas. Model results will be used to verify LLNL numerical codes
     for inertial confi...
9. Olson RE (Olson, R. E.)1, Hicks DG (Hicks, D. G.)2, Spears BK (Spears, B. K.)2, Celliers PM
     (Celliers, P. M.)2, Ho...
7. B. K. S PEARS Phase Contrast Radiography for Dynamic Plasma Experiments, CASIS Signal and
      Image Processing Confer...
• Graduate Student Instructor, University of California, Berkeley.
     Graduate vibrations. August, 2002-December, 2002.
...
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Cv100705

  1. 1. Brian K. Spears Physicist Inertial Confinement Fusion, AX Division Lawrence Livermore National Laboratory Livermore, CA 94551 Office: (925) 423-4825 5634 Idlewood Street Dublin, CA 94568 Home: (925) 556-9469 e-mail: spears9@llnl.gov Education Ph.D. University of California at Berkeley Mechanical Engineering 2004 GPA: 3.98/4.0 B.S. University of Texas at Austin Mechanical Engineering 2000 GPA: 3.98/4.0 B.A. University of Texas at Austin Plan II Liberal Arts 2000 GPA: 3.98/4.0 Professional Experience • Physicist, Lawrence Livermore National Laboratory. September, 2004-Present. Target designer: Served as lead designer for the NIC THD campaign. Used massively parallel computing systems to simulate radiation hydrodynamics of inertial confinement fusion (ICF) targets with cryogenic fuel (DT and THD) layers. Set specifications for THD fuel composition and operating conditions. Built databases of simulated implosions in multidimensional parameter spaces using uncertaintity quan- tification (UQ) machinery. Developed an experimentally observable performance metric (ITFX) to predict DT implosion performance based on low neutron yield THD surrogate targets. Developed the tuning strategy for the NIC convergent ablation campaign. Designed technique devel- opment experiments on the Omega laser. Developed rad-hydro simulations and streaked radiography postprocessors for Omega and NIF implosions. Performed single- and multi-variable sensitivity anal- yses to guide tuning experiments on the NIF. Developed numerical simulations of high precision radiography and phase contrast radiography for beryllium ICF targets. Uncertainty Quantification Strategic Initiative Co-PI: Served as the ICF applications lead. Collaborated with UQ methods researchers to apply UQ and data mining techniques to the development and analysis of ICF simulation databases. Emerging Leader Committee member: Member of group identified as potential future lab leadership tasked with making suggestions to ad- ministration based on view from the research staff level. Predictive Science Academic Alliance Program (PSAAP) TST for applications: Provided oversight and coordination of the LLNL UQ science colloboration with the University of Michigan PSAAP program. • Postdoctoral Researcher, Agilent Laboratories. June, 2004-September, 2004. Developed a lock-in amplifier with a chaotic reference. Used an inverse dynamical system approach to reduce noise and distortion. • National Defense Science and Engineering Graduate Fellow, University of California, Berkeley. August, 2000-June, 2004. Performed dynamical systems analysis of the nonlinear equations of motion of a charged particle in a quadrupole ion trap mass spectrometer. Used topological and perturbation techniques to under- stand new bifurcations of solutions and routes to chaos. Revealed possible new applications and new operating regimes for ion trap mass spectrometers. • Graduate Student Researcher, LLNL/UCRP grant at University of California, Berkeley. August, 2003-June, 2004.
  2. 2. liquid shells enclosing compressible gas. Model results will be used to verify LLNL numerical codes for inertial confinement fusion. Results are applicable to a variety of physical implosion problems. • Research Assistant, Applied Research Laboratories, University of Texas, Austin. August, 1999-May, 2000. Performed independent research on acoustic agglomeration of liquid aerosol. Designed an apparatus for the generation and agglomeration of liquid aerosol. Performed experimental studies of the effect of sound frequency on particle agglomeration rates. • Summer Engineer, Fina Oil and Chemical Company. June, 1999-August, 1999. Analyzed the rheological and mechanical properties of film-grade and blow-molding-grade high den- sity polyethylene (HDPE) resins. Used an optical control system to analyze gel inclusions in HDPE resin. Modeled the constitutive response of gel inclusions. • Student Researcher, Southwest Research Institute. June, 1998-August, 1998. Performed thermo-mechanical analyses using distinct element codes to determine the lifetime of nu- clear waste repositories. Publications 1. Spears, BK. Development of an experimentally observable metric to predict DT implosion perfor- mance based on low neutron yield THD implosions. In preparation. 2. Edwards MJ, Spears BK, and the Ignition IPT. The Experimental Plan for Cryogenic Layered Tar- get Implosions on the National Ignition Facility – the Inertial Confinement Approach to Fusion. In preparation. 3. Landen OL, Boehly TR, Bradley DK, Braun DG, Callahan DA, Celliers PM, Collins GW, Dewald EL, Divol L, Glenzer SH, Hamza A, Hicks DG, Hoffman N, Izumi N, Jones OS, Kirkwood RK (Kirkwood, R. K.)1, Kyrala GA (Kyrala, G. A.)3, Michel P (Michel, P.)1, Milovich J (Milovich, J.)1, Munro DH (Munro, D. H.)1, Nikroo A (Nikroo, A.)4, Olson RE (Olson, R. E.)5, Robey HF (Robey, H. F.)1, Spears BK (Spears, B. K.)1, Thomas CA (Thomas, C. A.)1, Weber SV (Weber, S. V.)1, Wilson DC (Wilson, D. C.)3, Marinak MM (Marinak, M. M.)1, Suter LJ (Suter, L. J.)1, Hammel BA (Hammel, B. A.)1, Meyerhofer DD (Meyerhofer, D. D.)2, Atherton J (Atherton, J.)1, Edwards J (Edwards, J.)1, Haan SW (Haan, S. W.)1, Lindl JD (Lindl, J. D.)1, MacGowan BJ (MacGowan, B. J.)1, Moses EI (Moses, E. I.). Capsule performance optimization in the National Ignition Campaign. PHYSICS OF PLASMAS Volume: 17 Issue: 5 Article Number: 056301 Published: MAY 2010. 4. Betti R (Betti, R.)1,2, Chang PY (Chang, P. Y.)1,2, Spears BK (Spears, B. K.)3, Anderson KS (An- derson, K. S.)1,2, Edwards J (Edwards, J.)3, Fatenejad M (Fatenejad, M.)4, Lindl JD (Lindl, J. D.)3, McCrory RL (McCrory, R. L.)1, Nora R (Nora, R.)1,2, Shvarts D (Shvarts, D.)5. Thermonuclear ignition in inertial confinement fusion and comparison with magnetic confinement. PHYSICS OF PLASMAS Volume: 17 Issue: 5 Article Number: 058102 Published: MAY 2010 5. Chang P (Chang, Py.)1,2, Betti R (Betti, R.)1,2, Spears BK (Spears, B. K.)3, Anderson KS (Anderson, K. S.)1,2, Edwards J (Edwards, J.)3, Fatenejad M (Fatenejad, M.)4, Lindl JD (Lindl, J. D.)3, McCrory RL (McCrory, R. L.)1, Nora R (Nora, R.)1,2, Shvarts D (Shvarts, D.). Generalized Measurable Igni- tion Criterion for Inertial Confinement Fusion. PHYSICAL REVIEW LETTERS Volume: 104 Issue: 13 Article Number: 135002 Published: APR 2 2010. 6. B. K. Spears1, S. Brandon1, D. Clark1,C. Cerjan1, J. Edwards1,O. Landen1, J. Lindl1, S. Haan1, S. Hatchett1, J. Salmonson1, P. Springer1, S.V.Weber1, and D. Wilson2. PREDICTION OF IGNI- TION IMPLOSION PERFORMANCE USING MEASUREMENTS OF LOW-DEUTERIUM SUR- ROGATES. Journal of Physics: Conference Series (IFSA 2009 proceedings in press) 7. Haan SW (Haan, S. W.)1, Callahan DA (Callahan, D. A.)1, Edwards MJ (Edwards, M. J.)1, Hammel BA (Hammel, B. A.)1, Ho DD (Ho, D. D.)1, Jones OS (Jones, O. S.)1, Lindl JD (Lindl, J. D.)1, MacGowan BJ (MacGowan, B. J.)1, Marinak MM (Marinak, M. M.)1, Munro DH (Munro, D. H.)1, Pollaine SM (Pollaine, S. M.)1, Salmonson JD (Salmonson, J. D.)1, Spears BK (Spears, B. K.)1, Suter LJ (Suter, L. J.). REV3 UPDATE OF REQUIREMENTS FOR NIF IGNITION TARGETS. FUSION SCIENCE AND TECHNOLOGY Volume: 55 Issue: 3 Pages: 227-232 Published: APR 2009. 8. Wilson DC (Wilson, D. C.)1, Bradley PA (Bradley, P. A.)1, Cerjan CJ (Cerjan, C. J.)2, Salmonson JD (Salmonson, J. D.)2, Spears BK (Spears, B. K.)2, Hatchet SP (Hatchet, S. P., II)2, Herrmann HW (Herrmann, H. W.)1, Glebov VY (Glebov, V. Yu.). Diagnosing ignition with DT reaction history. RE- VIEW OF SCIENTIFIC INSTRUMENTS Volume: 79 Issue: 10 Article Number: 10E525 Published: OCT 2008.
  3. 3. 9. Olson RE (Olson, R. E.)1, Hicks DG (Hicks, D. G.)2, Spears BK (Spears, B. K.)2, Celliers PM (Celliers, P. M.)2, Holder JP (Holder, J. P.)2, Landen OL (Landen, O. L.)2, Geissel M (Geissel, M.)1, Kellogg JW (Kellogg, J. W.)1, Bennett GR (Bennett, G. R.)1, Edens AD (Edens, A. D.)1, Atherton BW (Atherton, B. W.)1, Leeper RJ (Leeper, R. J.). Design of a streaked radiography instrument for ICF ablator tuning measurements. REVIEW OF SCIENTIFIC INSTRUMENTS Volume: 79 Issue: 10 Article Number: 10E913 Published: OCT 2008. 10. Brian Spears, Damien Hicks, Carol Velsko, Mark Stoyer, Harry Robey, Dave Munro, Steve Haan, Otto Landen. Influence and measurement of mass ablation in ICF implosions. Journal of Physics: Conference Series 112 (2008). 11. Spears BK, Tufillaro NB. A chaotic lock-in amplifier. AMERICAN JOURNAL OF PHYSICS Vol- ume: 76 Issue: 3 Pages: 213-217 Published: MAR 2008. 12. Bennett GR (Bennett, G. R.), Herrmann MC (Herrmann, M. C.), Edwards MJ (Edwards, M. J.), Spears BK (Spears, B. K.), Back CA (Back, C. A.), Breden EW (Breden, E. W.), Christenson PJ (Christenson, P. J.), Cuneo ME (Cuneo, M. E.), Dannenburg KL (Dannenburg, K. L.), Frederick C (Frederick, C.), Keller KL (Keller, K. L.), Mulville TD (Mulville, T. D.), Nikroo A (Nikroo, A.), Peterson K (Peterson, K.), Porter JL (Porter, J. L.), Russell CO (Russell, C. O.), Sinars DB (Sinars, D. B.), Smith IC (Smith, I. C.), Stamm RM (Stamm, R. M.), Vesey RA (Vesey, R. A.). Fill-tube-induced mass perturbations on X-ray-driven, ignition-scale, inertial-confinement-fusion capsule shells and the implications for ignition experiments. PHYSICAL REVIEW LETTERS Volume: 99 Issue: 20 Article Number: 205003 Published: NOV 16 2007. 13. H AAN SW (H AAN , S. W.), H ERRMANN MC (H ERRMANN , M. C.), S ALMONSON JD (S ALMONSON , J. D.), A MENDT PA (A MENDT, P. A.), C ALLAHAN DA (C ALLAHAN , D. A.), D ITTRICH TR (D IT- TRICH , T. R.), E DWARDS MJ (E DWARDS , M. J.), J ONES OS (J ONES , O. S.), M ARINAK MM (M ARINAK , M. M.), M UNRO DH (M UNRO , D. H.), P OLLAINE SM (P OLLAINE , S. M.), S PEARS BK (S PEARS , B. K.), S UTER LJ (S UTER , L. J.). Update on design simulations for NIF ignition targets, and the rollup of all specifications into an error budget. EUROPEAN PHYSICAL JOURNAL D Volume: 44 Issue: 2 Pages: 249-258 Published: AUG 2007. 14. H AAN SW, A MENDT PA, C ALLAHAN DA, D ITTRICH TR , E DWARDS MJ, H AMMEL BA, H O DD, J ONES OS, L INDL JD, M ARINAK MM, M UNRO DH, P OLLAINE SM, S ALMONSON JD, S PEARS BK, & S UTER LJ. Update on specifications for NIF ignition targets. FUSION SCIENCE AND TECHNOLOGY Volume: 51 Issue: 4 Pages: 509-513 Published: MAY 2007. 15. H AAN S. W., H ERRMANN M. C., A MENDT P. A., C ALLAHAN D. A., D ITTRICH T. R., E DWARDS M. J., J ONES O. S., M ARINAK M. M., M UNRO D. H., P OLLAINE S. M., S ALMONSON J. D., S PEARS B. K., & S UTER L. J. Update on specifications for NIF ignition targets, and their rollup into an error budget, Fusion Sci. and Tech., 49, 553-557, (2006) 16. B. K. S PEARS , M. H UTCHINGS , & A. J. S ZERI Topological bifurcations of attracting 2-tori of quasiperiodically driven nonlinear oscillators, J. Nonlinear Science, 15, 423-452 (2005). 17. B. K. S PEARS & A. J. S ZERI A new route to chaos through topological torus bifurcations, Chaos, 15, (2005). 18. B. K. S PEARS, Nonlinear dynamics of quasiperiodically driven oscillators: knotted torus attractors and their bifurcations, Ph.D. Dissertation, University of California, Berkeley, (2004). 19. B. K. S PEARS & A. J. S ZERI Topology and resonances in a quasiperiodically forced oscillator, Phys- ica D, 197, 69-85 (2004). Public Lectures and Invited Talks 1. B. K. Spears, Predicting ignition implosion performance using low-deuterium surrogates. APS Divi- sion of Plasma Physics, October, 2009. 2. B. K. Spears, Predicting ignition implosion performance using low-deuterium surrogates. IFSA, September, 2009 3. B. K. Spears, Using THD targets in the National Ignition Campaign. WCI summer student seminar, July, 2009. 4. B. K. Spears, Tuning mass ablation rate during the National Ignition Campaign. APS Division of Plasma Physics, October, 2007. 5. B. K. Spears, Influence and measurement of mass ablation in ICF implosions. IFSA, September, 2007 6. B. K. S PEARS Copper activation signatures for ablation rate measurements in inertial confinement
  4. 4. 7. B. K. S PEARS Phase Contrast Radiography for Dynamic Plasma Experiments, CASIS Signal and Image Processing Conference, November,2005 8. B. K. S PEARS Phase Contrast Radiography for Dynamic Plasma Experiments, APS Division of Plasma Physics, October,2005 9. B. K. S PEARS Nonlinear dynamics of ion traps: knotted torus attractors and their bifurcations. Semi- nar Lawrence Livermore National Laboratory, April 2004. 10. B. K. S PEARS Nonlinear dynamics of quasiperiodically driven oscillators: knotted torus attractors and their bifurcations. Dissertation Seminar UC Berkeley, April 2004. 11. B. K. S PEARS Topological bifurcations of knotted tori quasiperiodically driven oscillators. Control and Dynamical Systems Seminar Series (Marsden Group) Caltech, October 2003. 12. B. K. S PEARS & A. J. S ZERI Knotted invariant manifolds in a system with QP forcing. SIAM Conference on Applications of Dynamical Systems Utah, May 2003. Patents Patent pending with Agilent technologies. ”A chaotic signal mixer.” Research Interests Dynamics: dynamical systems (ODEs, PDEs, maps), geometric and topological methods for nonlinear dy- namics, perturbation techniques, stability and confinement, chaotic transport, bifurcation the- ory, routes to chaos, analysis of time series, encryption and chaotic masking, nonlinear control theory, vibrations. Physics: High Energy Density Physics – inertial confinement fusion, hydrodynamics, radiation transport, imaging. Fluid Mechanics – hydrodynamic shape stability, physics of collapsing flows, mixing and trans- port. Solid Mechanics – elasticity, plasticity, dynamics of deformable bodies, stability of continuous systems. Rigid-body Mechanics – Lagrangian mechanics, Hamiltonian mechanics. Computational Science: uncertainty quantification, verification and validation, data mining, fitting and re- gression. Teaching and Mentoring Experience • Summer Mentor, LLNL. David Starishak, “Development of decision trees for categorization of failure modes in ICF exper- iments (2008),” and “Adaptive sampling for enhancement of machine learning in ICF simulation databases (2009).” • Lecturer, University of California, Berkeley. Conducted the graduate level course Nonlinear oscillations in dynamical systems in Spring 2007. The course emphasizes dynamical systems techniques for nonlinear ODEs and maps, bifurcation theory, and chaos. • Summer Mentor, LLNL. Peter Gullekson, “Applicationsof streaked radiography for diagnosing ICF experiments (2006).” • Summer Mentor, LLNL. Karl Twelker, “Development of streaked radiography postprocessors for simulated ICF implosions (2005).” • Graduate Assistance in Areas of National Need (GAAN) Workshop Participant The GAANN fellowship program was designed to help train graduate students with interest in edu- cation and teaching careers. Participants took part in regular workshops and discussions focused on building lecture skills, analyzing teaching techniques, and learning from successful instructors. September, 2000-May, 2003 • Graduate Student Instructor, University of California, Berkeley. Lagrangian mechanics. January, 2004-May, 2004. Prepared and gave discussion sections aimed at a mixed undergraduate and graduate audience. Super- vised semester projects. Held regular office hours for homework and course assistance.
  5. 5. • Graduate Student Instructor, University of California, Berkeley. Graduate vibrations. August, 2002-December, 2002. Prepared and gave discussion sections and held regular office hours for homework and course assis- tance. Education and Outreach • B. K. S PEARS AND R. DYLLA -S PEARS, Careers in Science, Lecture to 5th and 6th grade science students, Oak Crest Intermediate School, San Antonio, Texas, December 2005. Described science education and science careers with emphasis on opportunities for under-represented groups. • B. K. S PEARS What is dynamics? Seminar for Applied Mathematics Undergraduates, UC Berkeley, March 2004. Invited by the undergraduate applied mathematics society to give an 1 hour presentation describing dynamical systems as well as opportunities for applied mathematics considering graduate school and professional positions. • Volunteer supervisor, American Inst. of Chem. Eng. Chemical Car Competition, San Francisco, October 2006. Provided safety oversight for mixed chemical waste streams generated by an alternative-fuel-driven model cars. Selected Honors and Awards WCI Directorate outstanding student mentor award 2009 NIF Programs Award: Outstanding contributions to implosions characterization AX Division outstanding student mentor award 2005 Nominee (1 of 2) from UC Berkeley for the 2004 Council of Graduate Schools International Distinguished Dissertation Award in Mathematics, Physical Sciences, and Engineering National Defense Science and Engineering Graduate Fellow Graduate Assistance in Areas of National Need Fellowship Recipient (declined) and Program Participant Finished in top 10% of Lawrence Postdoctoral Fellowship candidates (2004) SIAM Applications of Dynamical Systems 2003 travel award Graduate with Highest Honors in Mechanical Engineering (UT Austin) Graduate with Highest Honors in Liberal Arts (UT Austin) Outstanding Leader-Scholar, ME class of 2000 (awarded annually to a single ME graduate of UT Austin) Engineer in Training, Texas University of Texas Undergraduate Research Fellow and Grant recipient University of Texas Presidential Endowed Scholarship recipient (most prestigious scholarship awarded to undergraduates in progress) Presidential Endowed Scholarship in Mechanical Engineering (most prestigious departmental scholarship award) Engineering, Liberal Arts, and College Scholar Ernest Cockrell, Jr. Scholarship recipient Society Membership American Physical Society, Tau Beta Pi, Phi Beta Kappa Personal Date and place of birth: 8/31/77 San Antonio, TX USA Citizenship: USA

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