National Library of Energy BETA

Sample records for lab laser accelerator

  1. EA-1655: Berkeley Lab Laser Accelerator (BELLA) Laser Acquisition, Installation and Use for Research and Development

    Broader source: Energy.gov [DOE]

    Berkeley Lab Laser Accelerator (BELLA) Laser Acquisition, Installation and Use for Research and Development

  2. The BErkeley Lab Laser Accelerator (BELLA): A 10 GeV Laser Plasma Accelerator

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    ) that will be driven by a PW-class laser system and of the BELLA Project, which has as its primary goal to build and install the required Ti:sapphire laser system for the acceleration experiments. The basic design of the 10 to achieve 10 GeV electron beams from meter-scale accelerator structures using a PW-class laser system, which

  3. The BErkeley Lab Laser Accelerator (BELLA): A 10 GeV Laser Plasma Accelerator

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    of something like the proposed International Linear Collider--a 25 miles (40 kilometers) long machine place formidable demands on the accelerators that drive them. The design of the International Linear Collider (ILC), an RF-driven, TeV-scale, electron-positron machine, calls for a luminosity of 1034 cm-2 s-1

  4. About Accelerators | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Laser, though powered by a smaller SRF accelerator, holds power records in the production of infrared, ultraviolet and terahertz beams. The FEL has been used in a variety of...

  5. Lab announces Venture Acceleration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    a 3D virtualization company, enabling the use of 3D virtualization in art and cultural preservation markets. LAVA Chief Operations Officer Steve Smith said the "acceleration"...

  6. SLAC All Access: Laser Labs

    ScienceCinema (OSTI)

    Minitti, Mike; Woods Mike

    2014-06-03

    From supermarket checkouts to video game consoles, lasers are ubiquitous in our lives. Here at SLAC, high-power lasers are critical to the cutting-edge research conducted at the laboratory. But, despite what you might imagine, SLAC's research lasers bear little resemblance to the blasters and phasers of science fiction. In this edition of All Access we put on our safety goggles for a peek at what goes on inside some of SLAC's many laser labs. LCLS staff scientist Mike Minitti and SLAC laser safety officer Mike Woods detail how these lasers are used to study the behavior of subatomic particles, broaden our understanding of cosmic rays and even unlock the mysteries of photosynthesis.

  7. Lab Breakthrough: Fermilab Accelerator Technology

    Broader source: Energy.gov [DOE]

    Fermilab scientists developed techniques to retrofit some of the 30,000 particle accelerators in use around the world to make them more efficient and powerful.

  8. Free-Electron Laser | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    vacuum ultraviolet light, and is also a source of Terahertz light. The FEL uses electrons to produce laser light. The electrons are energized using the lab's superconducting...

  9. The Front End Fermi National Accelerator Lab

    E-Print Network [OSTI]

    McDonald, Kirk

    The Front End MAP Review Fermi National Accelerator Lab August 24-26, 2010 Harold G. Kirk Brookhaven National Laboratory #12;August 2426, 2010 MAP ReviewFront End Harold G. Kirk ReviewFront End Harold G. Kirk 3 The Muon Collider/Neutrino Factory

  10. Laser plasma accelerators

    SciTech Connect (OSTI)

    Malka, V. [Laboratoire d'Optique Appliquee, ENSTA-ParisTech, CNRS, Ecole Polytechnique, UMR 7639, 91761 Palaiseau (France)

    2012-05-15

    This review article highlights the tremendous evolution of the research on laser plasma accelerators which has, in record time, led to the production of high quality electron beams at the GeV level, using compact laser systems. I will describe the path we followed to explore different injection schemes and I will present the most significant breakthrough which allowed us to generate stable, high peak current and high quality electron beams, with control of the charge, of the relative energy spread and of the electron energy.

  11. Carrigan, Jr., Richard A. [Fermi National Accelerator Lab. (FNAL...

    Office of Scientific and Technical Information (OSTI)

    Accelerator Lab. (FNAL), Batavia, IL (United States) 43 PARTICLE ACCELERATORS; BEAM OPTICS; CHANNELING; ATTENUATION; BEAM EXTRACTION; BENDING; CRYSTALS; MESON BEAMS; BEAMS;...

  12. Laser acceleration of ion beams

    E-Print Network [OSTI]

    I. A. Egorova; A. V. Filatov; A. V. Prozorkevich; S. A. Smolyansky; D. B. Blaschke; M. Chubaryan

    2007-02-01

    We consider methods of charged particle acceleration by means of high-intensity lasers. As an application we discuss a laser booster for heavy ion beams provided, e.g. by the Dubna nuclotron. Simple estimates show that a cascade of crossed laser beams would be necessary to provide additional acceleration to gold ions of the order of GeV/nucleon.

  13. FEL Program | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    lab's expertise in superconducting radiofrequency (SRF) accelerators. The FEL uses electrons to produce laser light. The electrons are energized using the lab's superconducting...

  14. Scientists | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Committee (PAC) Experiments Proposals Research Highlights Publications Accelerator Science Experiment Research Free-Electron Laser Theory Center Jefferson Lab Library...

  15. Laser driven ion accelerator

    DOE Patents [OSTI]

    Tajima, Toshiki

    2005-06-14

    A system and method of accelerating ions in an accelerator to optimize the energy produced by a light source. Several parameters may be controlled in constructing a target used in the accelerator system to adjust performance of the accelerator system. These parameters include the material, thickness, geometry and surface of the target.

  16. Laser driven ion accelerator

    DOE Patents [OSTI]

    Tajima, Toshiki

    2006-04-18

    A system and method of accelerating ions in an accelerator to optimize the energy produced by a light source. Several parameters may be controlled in constructing a target used in the accelerator system to adjust performance of the accelerator system. These parameters include the material, thickness, geometry and surface of the target.

  17. Nonlinear laser energy depletion in laser-plasma accelerators

    E-Print Network [OSTI]

    Shadwick, B.A.

    2009-01-01

    Nonlinear laser energydepletion in laser-plasma accelerators ? B. A. Shadwick,of intense, short-pulse lasers via excitation of plasma

  18. Laser Wakefield Particle Acceleration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate studentScienceLaboratoryandBryanoutreach LaserLaserLaser

  19. LASER-PLASMA-ACCELERATOR-BASED GAMMA GAMMA COLLIDERS

    E-Print Network [OSTI]

    Schroeder, C. B.

    2010-01-01

    LASER-PLASMA-ACCELERATOR-BASED ?? COLLIDERS ? C. B.linear col- lider based on laser-plasma-accelerators arediscussed, and a laser-plasma-accelerator-based gamma-

  20. Colliding Laser Pulses for Laser-Plasma Accelerator Injection Control

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    Colliding Laser Pulses for Laser-Plasma Accelerator Injection Control G. R. Plateau, , C. G. R acceleration is a key challenge to achieve compact, reliable, tunable laser-plasma accelerators (LPA) [1, 2]. In colliding pulse injection the beat between multiple laser pulses can be used to control energy, energy

  1. Berkeley Lab Computing Sciences: Accelerating Scientific Discovery

    E-Print Network [OSTI]

    Hules, John A

    2009-01-01

    Chemistry Fusion Energy Materials Science Accelerating Scienti?c Discovery High Energy Physics Nuclear Physics Visualization & Analytics

  2. Laser-Plasma Wakefield Acceleration with Higher Order Laser Modes

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    Laser-Plasma Wakefield Acceleration with Higher Order Laser Modes C.G.R. Geddes , E. Cormier. Nevada, Reno and U.C. Berkeley Abstract. Laser-plasma collider designs point to staging of multiple accelerator stages at the 10 GeV level, which are to be developed on the upcoming BELLA laser, while Thomson

  3. Laser-PlasmaWakefield Acceleration with Higher Order Laser Modes

    E-Print Network [OSTI]

    Geddes, C.G.R.

    2011-01-01

    Design considerations for a laser-plasma linear collider,"E.Esarey, and W.P.Leemans, "Free-electron laser driven bythe LBNL laser-plasma accelerator," in Proc. Adv. Acc. Con.

  4. Laser Plasma Particle Accelerators: Large Fields for Smaller Facility Sources

    E-Print Network [OSTI]

    Geddes, Cameron G.R.

    2010-01-01

    of high- gradient, laser plasma particle accelerators.accelerators that use laser-driven plasma waves. Theseleft) showing the laser (red), plasma wake density (purple-

  5. Jefferson Lab accelerator upgrade completed: Initial operations...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    visiting scientists may continue commissioning the accelerator and dependent upon funding availability, some limited early physics running may be feasible as the capabilities of...

  6. Lab announces Venture Acceleration Fund recipients

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    a 3D virtualization company, enabling the use of 3D virtualization in art and cultural preservation markets. LAVA Chief Operations Officer Steve Smith said the "acceleration"...

  7. Compact X-ray Free Electron Laser from a Laser-plasma Accelerator...

    Office of Scientific and Technical Information (OSTI)

    Language: English Subject: 43 PARTICLE ACCELERATORS; ACCELERATORS; ELECTRON BEAMS; ELECTRONS; FREE ELECTRON LASERS; LASERS; PERFORMANCE; PLASMA GUNS; RADIATIONS; WIGGLER MAGNETS...

  8. Jefferson Lab Virtual Tour

    SciTech Connect (OSTI)

    None

    2013-07-13

    Take a virtual tour of the campus of Thomas Jefferson National Accelerator Facility. You can see inside our two accelerators, three experimental areas, accelerator component fabrication and testing areas, high-performance computing areas and laser labs.

  9. Jefferson Lab Virtual Tour

    ScienceCinema (OSTI)

    None

    2014-05-22

    Take a virtual tour of the campus of Thomas Jefferson National Accelerator Facility. You can see inside our two accelerators, three experimental areas, accelerator component fabrication and testing areas, high-performance computing areas and laser labs.

  10. Berkeley Lab Particle Accelerator Sets World Record

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits & Inspections AuditsBarbara2.0.1BenBerkeley Lab Particle

  11. Lab seeks ideas for Venture Acceleration Fund

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate student Subtask22BackgroundLabSanta's magical

  12. Lab seeks ideas for venture acceleration fund

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate student Subtask22BackgroundLabSanta's magicalVenture

  13. Lab seeks venture acceleration initiative partners

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate student Subtask22BackgroundLabSanta's

  14. Jefferson Lab Laser Twinkles in Rare Color | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    on the Jefferson Lab Ultraviolet Demonstration FEL, we delivered vacuum ultraviolet harmonic light to a calibrated VUV photodiode and measured five nanojoules of fully coherent...

  15. Modeling Laser Wakefield Accelerators in a Lorentz Boosted Frame

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Modeling Laser Wakefield Accelerators in a Lorentz Boosted Frame Modeling Laser Wakefield Accelerators in a Lorentz Boosted Frame VayBoost.gif An image showing the "boosted frame,"...

  16. Laser-accelerated disks for EOS studies

    SciTech Connect (OSTI)

    Harrach, R.J.; Szoke, A.

    1981-09-01

    An indirect method of laser-based equation of state studies, which utilizes shock waves generated by laser-accelerated projectiles rather than ablation shocks from direct laser irradiation of the sample under investigation, is proposed and examined theoretically. We derive simple formulas for the minimum thickness and maximum speed of laser-accelerated disks, comparing them with results of Nd-laser experiments conducted by the Naval Research Laboratory. Our calculations indicate that disks can be accelerated to velocities above 10/sup 7/ cm/s using a wide choice of laser parameters (pulse duration, energy, intensity, wavelength, etc.). The use of shorter wavelengths, e.g., a KrF(0.25 ..mu..m) laser rather than Nd (1.06 ..mu..m), allows thicker disks to be accelerated and faster velocities to be attained, approximately in the ratio (lambda/sub L/(Nd)/lambda/sub L/(KrF))/sup 1/3/ approx. = 1.6. One-dimensional Lasnex computer calculations indicate that the laser-accelerated disk constitutes a useful flyer plate even while disassembling under the force of the laser ablation shock. The calculations predict that the shockwave the projectile disk generates in a second (impact) disk located a suitable distance away has a greater amplitude than the laser shock and is considerably more steady, exhibiting little decay in propagating through the second disk.

  17. BELLA: The Berkeley Lab Laser Accelerator

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O DBiomass andAtomsVehicles and FuelsjBBEEVERSION

  18. Charge Diagnostics for Laser Plasma Accelerators

    E-Print Network [OSTI]

    Nakamura, K.

    2011-01-01

    electron spectrometer [24] before sending the e-beam to charge diagnostics,electron beams from the laser plasma accelerator, a comprehensive study of charge diagnosticselectron spectrom- eter was turned off to send e-beams to charge diagnostics.

  19. Colliding Laser Pulses for Laser-Plasma Accelerator Injection Control

    SciTech Connect (OSTI)

    Plateau, Guillaume; Geddes, Cameron; Matlis, Nicholas; Cormier-Michel, Estelle; Mittelberger, Daniel; Nakamura, Kei; Schroeder, Carl; Esarey, Eric; Leemans, Wim

    2011-07-19

    Decoupling injection from acceleration is a key challenge to achieve compact, reliable, tunable laser-plasma accelerators (LPA). In colliding pulse injection the beat between multiple laser pulses can be used to control energy, energy spread, and emittance of the electron beam by injecting electrons in momentum and phase into the accelerating phase of the wake trailing the driver laser pulse. At LBNL, using automated control of spatiotemporal overlap of laser pulses, two-pulse experiments showed stable operation and reproducibility over hours of operation. Arrival time of the colliding beam was scanned, and the measured timing window and density of optimal operation agree with simulations. The accelerator length was mapped by scanning the collision point.

  20. Ion Acceleration by Short Chirped Laser Pulses

    E-Print Network [OSTI]

    Li, Jian-Xing; Keitel, Christoph H; Harman, Zoltán

    2015-01-01

    Direct laser acceleration of ions by short frequency-chirped laser pulses is investigated theoretically. We demonstrate that intense beams of ions with a kinetic energy broadening of about 1 % can be generated. The chirping of the laser pulse allows the particles to gain kinetic energies of hundreds of MeVs, which is required for hadron cancer therapy, from pulses of energies of the order of 100 J. It is shown that few-cycle chirped pulses can accelerate ions more efficiently than long ones, i.e. higher ion kinetic energies are reached with the same amount of total electromagnetic pulse energy.

  1. Electron-Yield Enhancement in a Laser-Wakefield Accelerator Driven by Asymmetric Laser Pulses

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    Electron-Yield Enhancement in a Laser-Wakefield Accelerator Driven by Asymmetric Laser Pulses W. P accelerator by using nonlinearly chirped laser pulses from a 10 Hz, Ti:Al2O3, CPA based laser system [8

  2. Multiple pulse resonantly enhanced laser plasma wakefield acceleration

    SciTech Connect (OSTI)

    Corner, L.; Walczak, R.; Nevay, L. J.; Dann, S.; Hooker, S. M.; Bourgeois, N.; Cowley, J. [John Adams Institute for Accelerator Science, Oxford University, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom); Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU (United Kingdom)

    2012-12-21

    We present an outline of experiments being conducted at Oxford University on multiple-pulse, resonantly-enhanced laser plasma wakefield acceleration. This method of laser plasma acceleration uses trains of optimally spaced low energy short pulses to drive plasma oscillations and may enable laser plasma accelerators to be driven by compact and efficient fibre laser sources operating at high repetition rates.

  3. Polarization measurement of laser-accelerated protons

    SciTech Connect (OSTI)

    Raab, Natascha; Engels, Ralf; Engin, Ilhan; Greven, Patrick; Holler, Astrid; Lehrach, Andreas; Maier, Rudolf [Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425 Jülich (Germany)] [Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425 Jülich (Germany); Büscher, Markus, E-mail: m.buescher@fz-juelich.de [Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425 Jülich (Germany) [Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52425 Jülich (Germany); Peter Grünberg Institut (PGI-6), Forschungszentrum Jülich, 52425 Jülich (Germany); Institute for Laser- and Plasma Physics, Heinrich-Heine Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf (Germany); Cerchez, Mirela; Swantusch, Marco; Toncian, Monika; Toncian, Toma; Willi, Oswald [Institute for Laser- and Plasma Physics, Heinrich-Heine Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf (Germany)] [Institute for Laser- and Plasma Physics, Heinrich-Heine Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf (Germany); Gibbon, Paul; Karmakar, Anupam [Institute for Advanced Simulation, Jülich Supercomputing Centre, Forschungszentrum Jülich, 52425 Jülich (Germany)] [Institute for Advanced Simulation, Jülich Supercomputing Centre, Forschungszentrum Jülich, 52425 Jülich (Germany)

    2014-02-15

    We report on the successful use of a laser-driven few-MeV proton source to measure the differential cross section of a hadronic scattering reaction as well as on the measurement and simulation study of polarization observables of the laser-accelerated charged particle beams. These investigations were carried out with thin foil targets, illuminated by 100 TW laser pulses at the Arcturus laser facility; the polarization measurement is based on the spin dependence of hadronic proton scattering off nuclei in a Silicon target. We find proton beam polarizations consistent with zero magnitude which indicates that for these particular laser-target parameters the particle spins are not aligned by the strong magnetic fields inside the laser-generated plasmas.

  4. Laser driven compact ion accelerator

    DOE Patents [OSTI]

    Tajima, Toshiki

    2005-03-15

    A laser driven compact ion source including a light source that produces an energy pulse, a light source guide that guides the energy pulse to a target and produces an ion beam. The ion beam is transported to a desired destination.

  5. PRECISE CHARGE MEASUREMENT FOR LASER PLASMA ACCELERATORS

    SciTech Connect (OSTI)

    Nakamura, Kei; Gonsalves, Anthony; Lin, Chen; Sokollik, Thomas; Shiraishi, Satomi; Tilborg, Jeroen van; Osterhoff, Jens; Donahue, Rich; Rodgers, David; Smith, Alan; Byrne, Warren; Leemans, Wim

    2011-07-19

    Cross-calibrations of charge diagnostics are conducted to verify their validity for measuring electron beams produced by laser plasma accelerators (LPAs). Employed diagnostics are a scintillating screen, activation based measurement, and integrating current transformer. The diagnostics agreed within {+-}8 %, showing that they can provide accurate charge measurements for LPAs provided they are used properly.

  6. Light pressure acceleration with frequency-tripled laser pulse

    SciTech Connect (OSTI)

    Wang, Xiaofeng; Shen, Baifei, E-mail: bfshen@mail.shcnc.ac.cn, E-mail: zhxm@siom.ac.cn; Zhang, Xiaomei, E-mail: bfshen@mail.shcnc.ac.cn, E-mail: zhxm@siom.ac.cn; Ji, Liangliang; Wang, Wenpeng; Zhao, Xueyan; Xu, Jiancai; Yu, Yahong; Yi, Longqing; Shi, Yin; Xu, Tongjun; Zhang, Lingang [State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)

    2014-08-15

    Light pressure acceleration of ions in the interaction of the frequency-tripled (3?) laser pulse and foil target is studied, and a promising method to increase accelerated ion energy is shown. Results show that at a constant laser energy, much higher ion energy peak value is obtained for 3? laser compared with that using the fundamental frequency laser. The effect of energy loss during frequency conversion on ion acceleration is considered, which may slightly decrease the acceleration effect.

  7. 'Erratic' Lasers Pave Way for Tabletop Accelerators

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDidDevelopmentatabout WhoQUESTIONS",#LabSpotlight'DataLasers Pave

  8. Observation of laser multiple filamentation process and multiple electron beams acceleration in a laser wakefield accelerator

    SciTech Connect (OSTI)

    Li, Wentao; Liu, Jiansheng; Wang, Wentao; Chen, Qiang; Zhang, Hui; Tian, Ye; Zhang, Zhijun; Qi, Rong; Wang, Cheng; Leng, Yuxin; Li, Ruxin; Xu, Zhizhan

    2013-11-15

    The multiple filaments formation process in the laser wakefield accelerator (LWFA) was observed by imaging the transmitted laser beam after propagating in the plasma of different density. During propagation, the laser first self-focused into a single filament. After that, it began to defocus with energy spreading in the transverse direction. Two filaments then formed from it and began to propagate independently, moving away from each other. We have also demonstrated that the laser multiple filamentation would lead to the multiple electron beams acceleration in the LWFA via ionization-induced injection scheme. Besides, its influences on the accelerated electron beams were also analyzed both in the single-stage LWFA and cascaded LWFA.

  9. Driving laser pulse evolution in a hollow channel laser wakefield accelerator

    E-Print Network [OSTI]

    Wurtele, Jonathan

    Driving laser pulse evolution in a hollow channel laser wakefield accelerator P. Volfbeyn, P. B of the coupling between a high-intensity laser pulse and a plasma wake is presented, in the context of laser wakefield acceleration in a hollow channel. Laser wavelength reddening and pulse length shortening

  10. Direct laser acceleration of electrons in free-space

    E-Print Network [OSTI]

    Carbajo, Sergio; Wong, Liang Jie; Miller, R J Dwayne; Kärtner, Franz X

    2015-01-01

    Compact laser-driven accelerators are versatile and powerful tools of unarguable relevance on societal grounds for the diverse purposes of science, health, security, and technology because they bring enormous practicality to state-of-the-art achievements of conventional radio-frequency accelerators. Current benchmarking laser-based technologies rely on a medium to assist the light-matter interaction, which impose material limitations or strongly inhomogeneous fields. The advent of few cycle ultra-intense radially polarized lasers has materialized an extensively studied novel accelerator that adopts the simplest form of laser acceleration and is unique in requiring no medium to achieve strong longitudinal energy transfer directly from laser to particle. Here we present the first observation of direct longitudinal laser acceleration of non-relativistic electrons that undergo highly-directional multi-GeV/m accelerating gradients. This demonstration opens a new frontier for direct laser-driven particle accelerati...

  11. Summary Report of Working Group 1: Laser-Plasma Acceleration

    SciTech Connect (OSTI)

    Geddes, C.G.R.; Clayton, C.; Lu, W.; Thomas, A.G.R.

    2010-06-01

    Advances in and physics of the acceleration of particles using underdense plasma structures driven by lasers were the topics of presentations and discussions in Working Group 1 of the 2010 Advanced Accelerator Concepts Workshop. Such accelerators have demonstrated gradients several orders beyond conventional machines, with quasi-monoenergetic beams at MeV-GeV energies, making them attractive candidates for next generation accelerators. Workshop discussions included advances in control over injection and laser propagation to further improve beam quality and stability, detailed diagnostics and physics models of the acceleration process, radiation generation as a source and diagnostic, and technological tools and upcoming facilities to extend the reach of laser-plasma accelerators.

  12. LASER ACCELERATION IN VACUUM J.L. Hsu, T. Katsouleas

    E-Print Network [OSTI]

    Wurtele, Jonathan

    LASER ACCELERATION IN VACUUM J.L. Hsu, T. Katsouleas University of Southern California, Los Angeles electric fields of high-brightness lasers (e.g., up to order TV/cm) to accelerate particles. Unfortunately, as is well known, it is difficult to couple the vacuum field of the laser to particles so as to achieve a net

  13. Estimation of direct laser acceleration in laser wakefield accelerators using particle-in-cell simulations

    E-Print Network [OSTI]

    Shaw, J L; Marsh, K A; Tsung, F S; Mori, W B; Joshi, C

    2015-01-01

    Many current laser wakefield acceleration (LWFA) experiments are carried out in a regime where the laser pulse length is on the order of or longer than the wake wavelength and where ionization injection is employed to inject electrons into the wake. In these experiments, the trapped electrons will co-propagate with the longitudinal wakefield and the transverse laser field. In this scenario, the electrons can gain a significant amount of energy from both the direct laser acceleration (DLA) mechanism as well as the usual LWFA mechanism. Particle-in-cell (PIC) codes are frequently used to discern the relative contribution of these two mechanisms. However, if the longitudinal resolution used in the PIC simulations is inadequate, it can produce numerical heating that can overestimate the transverse motion, which is important in determining the energy gain due to DLA. We have therefore carried out a systematic study of this LWFA regime by varying the longitudinal resolution of PIC simulations from the standard, bes...

  14. Chirped pulse inverse free-electron laser vacuum accelerator

    DOE Patents [OSTI]

    Hartemann, Frederic V. (Dublin, CA); Baldis, Hector A. (Pleasanton, CA); Landahl, Eric C. (Walnut Creek, CA)

    2002-01-01

    A chirped pulse inverse free-electron laser (IFEL) vacuum accelerator for high gradient laser acceleration in vacuum. By the use of an ultrashort (femtosecond), ultrahigh intensity chirped laser pulse both the IFEL interaction bandwidth and accelerating gradient are increased, thus yielding large gains in a compact system. In addition, the IFEL resonance condition can be maintained throughout the interaction region by using a chirped drive laser wave. In addition, diffraction can be alleviated by taking advantage of the laser optical bandwidth with negative dispersion focusing optics to produce a chromatic line focus. The combination of these features results in a compact, efficient vacuum laser accelerator which finds many applications including high energy physics, compact table-top laser accelerator for medical imaging and therapy, material science, and basic physics.

  15. Laser-driven electron acceleration in infinite vacuum

    E-Print Network [OSTI]

    Wong, Liang Jie

    2011-01-01

    I first review basic models for laser-plasma interaction that explain electron acceleration and beam confinement in plasma. Next, I discuss ponderomotive electron acceleration in infinite vacuum, showing that the transverse ...

  16. Automatic beam path analysis of laser wakefield particle acceleration data

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    Automatic beam path analysis of laser wakefield particle acceleration data Oliver Rübel1 in a pipeline fashion to automatically locate and analyze high-energy particle bunches undergoing acceleration

  17. Vacuum laser acceleration of relativistic electrons using plasma mirror injectors

    E-Print Network [OSTI]

    Thévenet, M; Kahaly, S; Vincenti, H; Vernier, A; Quéré, F; Faure, J

    2015-01-01

    Accelerating particles to relativistic energies over very short distances using lasers has been a long standing goal in physics. Among the various schemes proposed for electrons, vacuum laser acceleration has attracted considerable interest and has been extensively studied theoretically because of its appealing simplicity: electrons interact with an intense laser field in vacuum and can be continuously accelerated, provided they remain at a given phase of the field until they escape the laser beam. But demonstrating this effect experimentally has proved extremely challenging, as it imposes stringent requirements on the conditions of injection of electrons in the laser field. Here, we solve this long-standing experimental problem for the first time by using a plasma mirror to inject electrons in an ultraintense laser field, and obtain clear evidence of vacuum laser acceleration. With the advent of PetaWatt class lasers, this scheme could provide a competitive source of very high charge (nC) and ultrashort rela...

  18. Laser-driven plasma-based accelerators: Wakefield excitation, channel guiding, and laser triggered particle injection*

    E-Print Network [OSTI]

    Wurtele, Jonathan

    Laser-driven plasma-based accelerators: Wakefield excitation, channel guiding, and laser triggered; accepted 18 February 1998 Plasma-based accelerators are discussed in which high-power short pulse lasers are the power source, suitably tailored plasma structures provide guiding of the laser beam and support large

  19. Jefferson Lab Gears up for 'Accelerating Discovery' Open House...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the public the best opportunity to see much of the lab and to find out about the many types of research and technological advancements underway here." Attendees will be able to...

  20. Lab-Corps Program Helping to Accelerate Commercialization of...

    Office of Environmental Management (EM)

    into high-impact technologies in the marketplace. | Photo by Dennis SchroederNREL The Energy Department's Lab-Corps pilot program is a national network that aims to...

  1. Jefferson Lab Builds First Single Crystal Single Cell Accelerating...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    superconducting accelerator cavities, visit: http:www.jlab.orgexpprogtechtransfernewtech.htmlcavities. For more information, or to schedule an interview, contact: Linda...

  2. Ultrafast Diagnostics for Electron Beams from Laser Plasma Accelerators

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    Ultrafast Diagnostics for Electron Beams from Laser Plasma Accelerators N. H. Matlis, M. Bakeman, C key parameters of electron bunches from Laser Plasma Accelerators (LPAs). The diagnostics presented the ability to fine-tune and stabilize the electron beam parameters, however, is the ability to measure them

  3. Simulation Study of Laser Plasma Accelerator Via Vorpal

    E-Print Network [OSTI]

    Zhu, Xiongwei

    2015-01-01

    In this paper, we use PIC code Vorpal to do the extensive simulation about the laser plasma accelerator in the linear, quasilinear and nonlinear regime respectively. We design the ~100 MeV or so laser plasma accelerator ( LPA ) via Vorpal simulation. Finally, we discuss the application of the designed LPA in the compact light source field.

  4. Two Jefferson Lab Scientists Win Prestigious Early Career Awards...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    research at the lab's Free-Electron Laser. He plans to develop high-dynamic range diagnostics for linear particle accelerators. Dudek, whose award comes through Old Dominion...

  5. DRIVER ACCELERATOR DESIGN FOR THE 10 KW UPGRADE OF THE JEFFERSON LAB IR FEL

    E-Print Network [OSTI]

    DRIVER ACCELERATOR DESIGN FOR THE 10 KW UPGRADE OF THE JEFFERSON LAB IR FEL D. Douglas, S. V, Newport News, VA23606, USA Abstract An upgrade of the Jefferson Lab IR FEL [1] is now un- der construction. It will provide 10 kW output light power in a wavelength range of 2­10 µm. The FEL will be driven by a modest

  6. Operational plasma density and laser parameters for future colliders based on laser-plasma accelerators

    SciTech Connect (OSTI)

    Schroeder, C. B.; Esarey, E.; Leemans, W. P.

    2012-12-21

    The operational plasma density and laser parameters for future colliders based on laser-plasma accelerators are discussed. Beamstrahlung limits the charge per bunch at low plasma densities. Reduced laser intensity is examined to improve accelerator efficiency in the beamstrahlung-limited regime.

  7. COLLIDING PULSE INJECTION CONTROL IN A LASER-PLASMA ACCELERATOR

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    COLLIDING PULSE INJECTION CONTROL IN A LASER-PLASMA ACCELERATOR C.G.R. Geddes , G.R. Plateau, M is presented using the beat between two 'collid- ing' laser pulses to kick electrons into the plasma wake laser pulses [12, 13, 14, 15]. In the colliding pulse technique, the ponderomotive force of the beat

  8. Sub-femtosecond electron bunches created by direct laser acceleration in a laser wakefield accelerator with ionization injection

    E-Print Network [OSTI]

    Lemos, N; Marsh, K A; Joshi, C

    2015-01-01

    In this work, we will show through three-dimensional particle-in-cell simulations that direct laser acceleration in laser a wakefield accelerator can generate sub-femtosecond electron bunches. Two simulations were done with two laser pulse durations, such that the shortest laser pulse occupies only a fraction of the first bubble, whereas the longer pulse fills the entire first bubble. In the latter case, as the trapped electrons moved forward and interacted with the high intensity region of the laser pulse, micro-bunching occurred naturally, producing 0.5 fs electron bunches. This is not observed in the short pulse simulation.

  9. Jefferson Lab: Laser gun to eventually shoot down missiles (Daily...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    articles.dailypress.com2011-02-21newsdp-nws-jefferson-lab-201102211jefferson-lab-researchers-free-electron-l... Submitted: Monday, February 21, 2011...

  10. Lab Breakthrough: Supercomputing Power to Accelerate Fossil Energy Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResource andfirstDevice UWRecord-Setting Cavities Lab|

  11. UNDULATOR-BASED LASER WAKEFIELD ACCELERATOR ELECTRON BEAM DIAGNOSTIC

    E-Print Network [OSTI]

    Bakeman, M.S.

    2010-01-01

    LASER WAKEFIELD ACCELERATOR ELECTRON BEAM DIAGNOSTIC* M.S.quasi-monoenergetic electron beams with energies up to 1high-peak- current, electron beams are ideal for driving a

  12. Stable laser–plasma accelerators at low densities

    SciTech Connect (OSTI)

    Li, Song; Hafz, Nasr A. M. Mirzaie, Mohammad; Ge, Xulei; Sokollik, Thomas; Chen, Min; Sheng, Zhengming; Zhang, Jie

    2014-07-28

    We report stable laser wakefield acceleration using 17–50 TW laser pulses interacting with 4?mm-long helium gas jet. The initial laser spot size was relatively large (28??m) and the plasma densities were 0.48–2.0?×?10{sup 19?}cm{sup ?3}. High-quality 100–MeV electron beams were generated at the plasma density of 7.5?×?10{sup 18?}cm{sup ?3}, at which the beam parameters (pointing angle, energy spectrum, charge, and divergence angle) were measured and stabilized. At higher densities, filamentation instability of the laser-plasma interaction was observed and it has led to multiple wakefield accelerated electron beams. The experimental results are supported by 2D particle-in-cell simulations. The achievement presented here is an important step toward the use of laser-driven accelerators in real applications.

  13. Probing electron acceleration and x-ray emission in laser-plasma accelerators

    SciTech Connect (OSTI)

    Thaury, C.; Ta Phuoc, K.; Corde, S.; Brijesh, P.; Lambert, G.; Malka, V. [Laboratoire d'Optique Appliquée, ENSTA ParisTech—CNRS UMR7639—École Polytechnique ParisTech, Chemin de la Hunière, 91761 Palaiseau (France)] [Laboratoire d'Optique Appliquée, ENSTA ParisTech—CNRS UMR7639—École Polytechnique ParisTech, Chemin de la Hunière, 91761 Palaiseau (France); Mangles, S. P. D.; Bloom, M. S.; Kneip, S. [Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom)

    2013-06-15

    While laser-plasma accelerators have demonstrated a strong potential in the acceleration of electrons up to giga-electronvolt energies, few experimental tools for studying the acceleration physics have been developed. In this paper, we demonstrate a method for probing the acceleration process. A second laser beam, propagating perpendicular to the main beam, is focused on the gas jet few nanosecond before the main beam creates the accelerating plasma wave. This second beam is intense enough to ionize the gas and form a density depletion, which will locally inhibit the acceleration. The position of the density depletion is scanned along the interaction length to probe the electron injection and acceleration, and the betatron X-ray emission. To illustrate the potential of the method, the variation of the injection position with the plasma density is studied.

  14. Testing General Relativity With Laser Accelerated Electron Beams

    E-Print Network [OSTI]

    L. Á. Gergely; T. Harko

    2012-07-16

    Electron accelerations of the order of $10^{21} g$ obtained by laser fields open up the possibility of experimentally testing one of the cornerstones of general relativity, the weak equivalence principle, which states that the local effects of a gravitational field are indistinguishable from those sensed by a properly accelerated observer in flat space-time. We illustrate how this can be done by solving the Einstein equations in vacuum and integrating the geodesic equations of motion for a uniformly accelerated particle.

  15. Lab announces selection of partner for venture acceleration initiative

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate student Subtask22Background AboutVenture acceleration

  16. Free-Electron Laser Targets Fat | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Free-Electron Laser Targets Fat April 10, 2006 Free-Electron Laser Scientists Rox Anderson, right, and Free-Electron Laser Scientist Steve Benson, left, discuss laser beam...

  17. Tapered plasma channels to phase-lock accelerating and focusing forces in laser-plasma accelerators

    SciTech Connect (OSTI)

    Rittershofer, W.; Schroeder, C.B.; Esarey, E.; Gruner, F.J.; Leemans, W.P.

    2010-05-17

    Tapered plasma channels are considered for controlling dephasing of a beam with respect to a plasma wave driven by a weakly-relativistic, short-pulse laser. Tapering allows for enhanced energy gain in a single laser plasma accelerator stage. Expressions are derived for the taper, or longitudinal plasma density variation, required to maintain a beam at a constant phase in the longitudinal and/or transverse fields of the plasma wave. In a plasma channel, the phase velocities of the longitudinal and transverse fields differ, and, hence, the required tapering differs. The length over which the tapered plasma density becomes singular is calculated. Linear plasma tapering as well as discontinuous plasma tapering, which moves beams to adjacent plasma wave buckets, are also considered. The energy gain of an accelerated electron in a tapered laser-plasma accelerator is calculated and the laser pulse length to optimize the energy gain is determined.

  18. Implementation of DOE NPH Requirements at the Thomas Jefferson National Accelerator Facility (TJNAF), a Non-Nuclear DOE Lab

    Office of Energy Efficiency and Renewable Energy (EERE)

    Implementation of DOE NPH Requirements at the Thomas Jefferson National Accelerator Facility (TJNAF), a Non-Nuclear DOE Lab David Luke, DOE, Thomas Jefferson Site Office Stephen McDuffie, DOE, Office of the Chief of Nuclear Safety

  19. New Lasers Pave Way for Tabletop Accelerators

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Large Hadron Collider where the Higgs boson was recently discovered, rely on high-power radio-frequency waves to energize electrons. The new type of accelerator, known as a...

  20. Jefferson Lab's Free-Electron Laser explores promise of carbon...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and quantum computing and as components for microelectromechanical sensors, or MEMS. The tubes could also function as a "lab on a chip," with attached microelectronics and...

  1. Free electron laser using Rf coupled accelerating and decelerating structures

    DOE Patents [OSTI]

    Brau, Charles A. (Los Alamos, NM); Swenson, Donald A. (Los Alamos, NM); Boyd, Jr., Thomas J. (Los Alamos, NM)

    1984-01-01

    A free electron laser and free electron laser amplifier using beam transport devices for guiding an electron beam to a wiggler of a free electron laser and returning the electron beam to decelerating cavities disposed adjacent to the accelerating cavities of the free electron laser. Rf energy is generated from the energy depleted electron beam after it emerges from the wiggler by means of the decelerating cavities which are closely coupled to the accelerating cavities, or by means of a second bore within a single set of cavities. Rf energy generated from the decelerated electron beam is used to supplement energy provided by an external source, such as a klystron, to thereby enhance overall efficiency of the system.

  2. Novel Aspects of Direct Laser Acceleration of Relativistic Electrons

    E-Print Network [OSTI]

    Arefiev, A V; Khudik, V N

    2015-01-01

    We examine the impact of several factors on electron acceleration by a laser pulse and the resulting electron energy gain. Specifically, we consider the role played by: 1) static longitudinal electric field; 2) static transverse electric field; 3) electron injection into the laser pulse; and 4) static longitudinal magnetic field. It is shown that all of these factors lead, under certain conditions, to a considerable electron energy gain from the laser pulse. In contrast with other mechanisms such as wakefield acceleration, the static electric fields in this case do not directly transfer substantial energy to the electron. Instead, they reduce the longitudinal dephasing between the electron and the laser beam, which then allows the electron to gain extra energy from the beam. The mechanisms discussed here are relevant to experiments with under-dense gas jets, as well as to experiments with solid-density targets involving an extended pre-plasma.

  3. Quasimonoenergetic electron beams from laser wakefield acceleration in pure nitrogen

    SciTech Connect (OSTI)

    Mo, M. Z.; Ali, A.; Fedosejevs, R. [Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 2V4 (Canada); Fourmaux, S.; Lassonde, P.; Kieffer, J. C. [INRS-EMT, Universite du Quebec, 1650 Lionel Boulet, Varennes, Quebec J3X 1S2 (Canada)

    2012-02-13

    Quasimonoenergetic electron beams with maximum energy >0.5 GeV and 2 mrad divergence have been generated in pure nitrogen gas via wakefield acceleration with 80 TW, 30 fs laser pulses. Long low energy tail features were typically observed due to continuous ionization injection. The measured peak electron energy decreased with the plasma density, agreeing with the predicted scaling for electrons. The experiments showed a threshold electron density of 3x10{sup 18}cm{sup -3} for self-trapping. Our experiments suggest that pure Nitrogen is a potential candidate gas to achieve GeV monoenergetic electrons using the ionization induced injection scheme for laser wakefield acceleration.

  4. Undulator-Based Laser Wakefield Accelerator Electron Beam Energy Spread and Emittance Diagnostic

    E-Print Network [OSTI]

    Bakeman, M.S.

    2011-01-01

    Laser Wakefield Accelerator Electron Beam Energy Spread andposition detection of electron beams from laser-plasmaLPA) to measure electron beam energy spread and emittance

  5. The BErkeley Lab Laser Accelerator (BELLA): A 10 GeV Laser Plasma Accelerator

    E-Print Network [OSTI]

    Leemans, W.P.

    2011-01-01

    design of the International Linear Collider (ILC), an RF-the proposed International Linear Collider—a 25 miles (40

  6. A cascaded laser acceleration scheme for the generation of spectrally controlled proton beams

    E-Print Network [OSTI]

    Pfotenhauer, Sebastian Michael

    We present a novel, cascaded acceleration scheme for the generation of spectrally controlled ion beams using a laser-based accelerator in a 'double-stage' setup. An MeV proton beam produced during a relativistic laser–plasma ...

  7. Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Flexible hydropower: boosting energy December 16, 2014 New hydroelectric resource for Northern New Mexico supplies clean energy to homes, businesses and the Lab We know a lot of...

  8. Optimization of THz Radiation Generation from a Laser Wakefield Accelerator

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    used to characterize these THz pulses. Keywords: T-rays generation, CTR, LWFA, Beam diagnostics PACS ultrashort electron bunches with energies up to 1 GeV [1] and energy spreads of a few-percent. Laser pulses interacting with a plasma create accelerated electrons which upon exiting the plasma emit terahertz pulses via

  9. Selective Deuterium Ion Acceleration Using the Vulcan PW Laser

    E-Print Network [OSTI]

    Krygier, AG; Kar, S; Ahmed, H; Alejo, A; Clarke, R; Fuchs, J; Green, A; Jung, D; Kleinschmidt, A; Najmudin, Z; Nakamura, H; Norreys, P; Notley, M; Oliver, M; Roth, M; Vassura, L; Zepf, M; Borghesi, M; Freeman, RR

    2015-01-01

    We report on the successful demonstration of selective acceleration of deuterium ions by target-normal sheath acceleration (TNSA) with a high-energy petawatt laser. TNSA typically produces a multi-species ion beam that originates from the intrinsic hydrocarbon and water vapor contaminants on the target surface. Using the method first developed by Morrison, et al., \\cite{Morrison:POP2012} an ion beam with $>$99$\\%$ deuterium ions and peak energy 28 MeV is produced with a 200 J, 700fs, $>10^{20} W/cm^{2}$ laser pulse by cryogenically freezing heavy water (D$_{2}$O) vapor onto the rear surface of the target prior to the shot. The estimated total yield of deuterium ions in an assumed 10$^{\\circ}$ half-angle cone was 3.0 $\\mu$C (1.9 $\\times 10^{13}$ ions) with 6.6$\\%$ laser-to-deuterium ion energy conversion efficiency.

  10. Development of high gradient laser wakefield accelerators towards nuclear detection applications at LBNL

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    compact systems. Laser-driven, plasma wakefield accelerators (LWFAs) [2] in use at LBNL provide high than conventional linacs, and confirms the anticipated scaling of laser driven accelerators to GeDevelopment of high gradient laser wakefield accelerators towards nuclear detection applications

  11. FMEA on the superconducting torus for the Jefferson Lab 12 GeV accelerator upgrade

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Ghoshal, Probir K.; Biallas, George H.; Fair, Ruben J.; Rajput-Ghoshal, Renuka; Schneider, William J.; Legg, Robert A.; Kashy, David H.; Hogan, John P.; Wiseman, Mark A.; Luongo, Cesar; et al

    2015-01-16

    As part of the Jefferson Lab 12GeV accelerator upgrade project, Hall B requires two conduction cooled superconducting magnets. One is a magnet system consisting of six superconducting trapezoidal racetrack-type coils assembled in a toroidal configuration and the second is an actively shielded solenoidal magnet system consisting of 5 coils. Both magnets are to be wound with Superconducting Super Collider-36 NbTi strand Rutherford cable soldered into a copper channel. This paper describes the various failure modes in torus magnet along with the failure modes that could be experienced by the torus and its interaction with the solenoid which is located inmore »close proximity.« less

  12. SAF 114O Laser Safety Orientation Training | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Laser Safety Orientation (SAF114 O) training opportunity. Date: Friday, October 23 Time: 10:30 - noon Location: CEBAF Center Room A110 Read JLab EH&S Manual Chapter 6410 Laser...

  13. SAF 114O Laser Safety Orientation Training | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SAF 114O Laser Safety Orientation Training For staff and students: Course: SAF 114O Laser Safety Orientation Date: Tuesday, July 14, 2015 Time: 10:30 - noon Location: CEBAF Center,...

  14. Four Crazy Uses for Lasers in the National Labs

    Broader source: Energy.gov [DOE]

    The top five craziest things our researchers do with lasers in their pursuit to understand our physical world.

  15. Laser red shifting based characterization of wakefield excitation in a laser-plasma accelerator

    SciTech Connect (OSTI)

    Shiraishi, S.; Benedetti, C.; Gonsalves, A. J.; Nakamura, K.; Shaw, B. H.; Sokollik, T.; Tilborg, J. van; Geddes, C. G. R.; Schroeder, C. B.; Tóth, Cs.; Esarey, E.; Leemans, W. P. [Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)] [Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

    2013-06-15

    Optical spectra of a drive laser exiting a channel guided laser-plasma accelerator (LPA) are analyzed through experiments and simulations to infer the magnitude of the excited wakefields. The experiments are performed at sufficiently low intensity levels and plasma densities to avoid electron beam generation via self-trapping. Spectral redshifting of the laser light is studied as an indicator of the efficiency of laser energy transfer into the plasma through the generation of coherent plasma wakefields. Influences of input laser energy, plasma density, temporal and spatial laser profiles, and laser focal location in a plasma channel are analyzed. Energy transfer is found to be sensitive to details of laser pulse shape and focal location. The experimental conditions for these critical parameters are modeled and included in particle-in-cell simulations. Simulations reproduce the redshift of the laser within uncertainties of the experiments and produce an estimate of the wake amplitudes in the experiments as a function of amount of redshift. The results support the practical use of laser redshifting to quantify the longitudinally averaged accelerating field that a particle would experience in an LPA powered below the self-trapping limit.

  16. Jefferson Lab's Free-Electron Laser Joins With Others in New...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Free-Electron Laser Joins With Others in New Research Venture NEWPORT NEWS, VA, April 29, 2009 - The U.S. Department of Energy's Thomas Jefferson National Accelerator Facility will...

  17. Laser polishing for topography management of accelerator cavity surfaces

    SciTech Connect (OSTI)

    Zhao, Liang; Klopf, J. Mike; Reece, Charles E.; Kelley, Michael J.

    2015-07-20

    Improved energy efficiency and reduced cost are greatly desired for advanced particle accelerators. Progress toward both can be made by atomically-smoothing the interior surface of the niobium superconducting radiofrequency accelerator cavities at the machine's heart. Laser polishing offers a green alternative to the present aggressive chemical processes. We found parameters suitable for polishing niobium in all surface states expected for cavity production. As a result, careful measurement of the resulting surface chemistry revealed a modest thinning of the surface oxide layer, but no contamination.

  18. Title of Document: EMITTANCE MEASUREMENTS OF THE JEFFERSON LAB FREE ELECTRON LASER

    E-Print Network [OSTI]

    Anlage, Steven

    to be a quality diagnostic that is especially useful for high brightness electron beams such as Jefferson Labs FEL, such as the ones that power Free Electron Lasers (FEL), require high quality (low emittance) beams for efficient operation. Accurate and reliable beam diagnostics are essential to monitoring beam parameters in order

  19. Laser Safety Orientation SAF114O | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Room A110 Time: 9:30 - 11:00 am Prerequisite ... Review JLab EH&S Manual Chapter 6410 Laser Safety Program and appendices at https:www.jlab.orgehsehsmanualmanual6410.html....

  20. Jefferson Lab's upgraded Free-Electron Laser produces first ligh...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the Navy's goals and expectations and we expect no less from the upgraded FEL." The Free-Electron Laser upgrade project is funded by the Department of Defense's Office of...

  1. Laser safety information for the Atomic, Molecular and Optical (AMO) Physics Labs at Lehigh University modified from the laser safety program developed by the office of Environmental

    E-Print Network [OSTI]

    Huennekens, John

    1 Laser safety information for the Atomic, Molecular and Optical (AMO) Physics Labs at Lehigh University modified from the laser safety program developed by the office of Environmental Health and Safety using the following reference materials: I. American National Standards for Safe Use of Lasers - ANSI Z

  2. Two-color-laser-driven direct electron acceleration in infinite vacuum

    E-Print Network [OSTI]

    Wong, Liang Jie

    We propose a direct electron acceleration scheme that uses a two-color pulsed radially polarized laser beam. The two-color scheme achieves electron acceleration exceeding 90% of the theoretical energy gain limit, over twice ...

  3. Acceleration of electrons using an inverse free electron laser auto- accelerator

    SciTech Connect (OSTI)

    Wernick, I.K.; Marshall, T.C.

    1992-07-01

    We present data from our study of a device known as the inverse free electron laser. First, numerical simulations were performed to optimize the design parameters for an experiment that accelerates electrons in the presence of an undulator by stimulated absorption of radiation. The Columbia free electron laser (FEL) was configured as an auto-accelerator (IFELA) system; high power (MW's) FEL radiation at {approximately}1.65 mm is developed along the first section of an undulator inside a quasi-optical resonator. The electron beam then traverses a second section of undulator where a fraction of the electrons is accelerated by stimulated absorption of the 1.65 mm wavelength power developed in the first undulator section. The second undulator section has very low gain and does not generate power on its own. We have found that as much as 60% of the power generated in the first section can be absorbed in the second section, providing that the initial electron energy is chosen correctly with respect to the parameters chosen for the first and second undulators. An electron momentum spectrometer is used to monitor the distribution of electron energies as the electrons exit the IFELA. We have found; using our experimental parameters, that roughly 10% of the electrons are accelerated to energies as high as 1100 keV, in accordance with predictions from the numerical model. The appearance of high energy electrons is correlated with the abrupt absorption of millimeter power. The autoaccelerator configuration is used because there is no intense source of coherent power at the 1.65 mm design wavelength other than the FEL.

  4. Acceleration of electrons using an inverse free electron laser auto- accelerator

    SciTech Connect (OSTI)

    Wernick, I.K.; Marshall, T.C.

    1992-07-01

    We present data from our study of a device known as the inverse free electron laser. First, numerical simulations were performed to optimize the design parameters for an experiment that accelerates electrons in the presence of an undulator by stimulated absorption of radiation. The Columbia free electron laser (FEL) was configured as an auto-accelerator (IFELA) system; high power (MW`s) FEL radiation at {approximately}1.65 mm is developed along the first section of an undulator inside a quasi-optical resonator. The electron beam then traverses a second section of undulator where a fraction of the electrons is accelerated by stimulated absorption of the 1.65 mm wavelength power developed in the first undulator section. The second undulator section has very low gain and does not generate power on its own. We have found that as much as 60% of the power generated in the first section can be absorbed in the second section, providing that the initial electron energy is chosen correctly with respect to the parameters chosen for the first and second undulators. An electron momentum spectrometer is used to monitor the distribution of electron energies as the electrons exit the IFELA. We have found; using our experimental parameters, that roughly 10% of the electrons are accelerated to energies as high as 1100 keV, in accordance with predictions from the numerical model. The appearance of high energy electrons is correlated with the abrupt absorption of millimeter power. The autoaccelerator configuration is used because there is no intense source of coherent power at the 1.65 mm design wavelength other than the FEL.

  5. Performance of the accelerator driver of Jefferson Laboratory's free-electron laser

    SciTech Connect (OSTI)

    Bohn, C.L.; Benson, S.; Biallas, G.

    1999-04-01

    The driver of Jefferson Lab's kW-level infrared free-electron laser (FEL) is a superconducting, recirculating accelerator that recovers about 75% of the electron-beam power and converts it to radiofrequency power. In achieving first lasing, the accelerator operated straight-ahead to deliver 38 MeV, 1.1 mA cw current through the wiggler for lasing at wavelengths in the vicinity of 5 {mu}m. Just prior to first lasing, measured rms beam properties at the wiggler were 7.5{+-}1.5 mm-mr normalized transverse emittance, 26{+-}7 keV-deg longitudinal emittance, and 0.4{+-}0.1 ps bunch length which yielded a peak current of 60{+-}15A. The waste beam was then sent directly to a dump, bypassing the recirculation loop. Stable operation at up to 311 W cw was achieved in this mode. Commissioning the recirculation loop then proceeded. As of this Conference, the machine has recirculated cw average current up to 4 mA, and has lased cw with energy recover up to 710 W.

  6. Summary report of working group 3: High gradient and laser-structure based acceleration

    SciTech Connect (OSTI)

    Solyak, N.; Cowan, B.M.; /Tech-X, Boulder

    2010-01-01

    The charge for the working group on high gradient and laser-structure based acceleration was to assess the current challenges involved in developing an advanced accelerator based on electromagnetic structures, and survey state-of-the-art methods to address those challenges. The topics of more than 50 presentations in the working group covered a very broad range of issues, from ideas, theoretical models and simulations, to design and manufacturing of accelerating structures and, finally, experimental results on obtaining extremely high accelerating gradients in structures from conventional microwave frequency range up to THz and laser frequencies. Workshop discussion topics included advances in the understanding of the physics of breakdown and other phenomena, limiting high gradient performance of accelerating structures. New results presented in this workshop demonstrated significant progress in the fields of conventional vacuum structure-based acceleration, dielectric wakefield acceleration, and laser-structure acceleration.

  7. Laser acceleration and deflection of 963 keV electrons with a silicon dielectric structure

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Leedle, Kenneth J.; Pease, R. Fabian; Byer, Robert L.; Harris, James S.

    2015-02-12

    Radio frequency particle accelerators are ubiquitous in ultrasmall and ultrafast science, but their size and cost have prompted exploration of compact and scalable alternatives such as the dielectric laser accelerator. We present the first demonstration, to the best of our knowledge, of high gradient laser acceleration and deflection of electrons with a silicon structure. Driven by a 5 nJ, 130 fs mode-locked Ti:sapphire laser at 907 nm wavelength, our devices achieve accelerating gradients in excess of 200 MeV/m and suboptical cycle streaking of 96.30 keV electrons. These results pave the way for high gradient silicon dielectric laser accelerators using commercialmore »lasers and subfemtosecond electron beam experiments.« less

  8. Beam transport and monitoring for laser plasma accelerators

    SciTech Connect (OSTI)

    Nakamura, K.; Sokollik, T.; Tilborg, J. van; Gonsalves, A. J.; Shaw, B.; Shiraishi, S.; Mittal, R.; De Santis, S.; Byrd, J. M.; Leemans, W. [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States) and University of California, Berkeley, CA 94720 (United States)

    2012-12-21

    The controlled transport and imaging of relativistic electron beams from laser plasma accelerators (LPAs) are critical for their diagnostics and applications. Here we present the design and progress in the implementation of the transport and monitoring system for an undulator based electron beam diagnostic. Miniature permanent-magnet quadrupoles (PMQs) are employed to realize controlled transport of the LPA electron beams, and cavity based electron beam position monitors for non-invasive beam position detection. Also presented is PMQ calibration by using LPA electron beams with broadband energy spectrum. The results show promising performance for both transporting and monitoring. With the proper transport system, XUV-photon spectra from THUNDER will provide the momentum distribution of the electron beam with the resolution above what can be achieved by the magnetic spectrometer currently used in the LOASIS facility.

  9. Modeling laser wakefield accelerators in a Lorentz boosted frame

    SciTech Connect (OSTI)

    Vay, J.-L.; Geddes, C.G.R.; Cormier-Michel, E.; Grote, D.P.

    2010-09-15

    Modeling of laser-plasma wakefield accelerators in an optimal frame of reference [1] is shown to produce orders of magnitude speed-up of calculations from first principles. Obtaining these speedups requires mitigation of a high frequency instability that otherwise limits effectiveness in addition to solutions for handling data input and output in a relativistically boosted frame of reference. The observed high-frequency instability is mitigated using methods including an electromagnetic solver with tunable coefficients, its extension to accomodate Perfectly Matched Layers and Friedman's damping algorithms, as well as an efficient large bandwidth digital filter. It is shown that choosing theframe of the wake as the frame of reference allows for higher levels of filtering and damping than is possible in other frames for the same accuracy. Detailed testing also revealed serendipitously the existence of a singular time step at which the instability level is minimized, independently of numerical dispersion, thus indicating that the observed instability may not be due primarily to Numerical Cerenkov as has been conjectured. The techniques developed for Cerenkov mitigation prove nonetheless to be very efficient at controlling the instability. Using these techniques, agreement at the percentage level is demonstrated between simulations using different frames of reference, with speedups reaching two orders of magnitude for a 0.1 GeV class stages. The method then allows direct and efficient full-scale modeling of deeply depleted laser-plasma stages of 10 GeV-1 TeV for the first time, verifying the scaling of plasma accelerators to very high energies. Over 4, 5 and 6 orders of magnitude speedup is achieved for the modeling of 10 GeV, 100 GeV and 1 TeV class stages, respectively.

  10. Tunable Laser Plasma Accelerator based on Longitudinal Density Tailoring

    E-Print Network [OSTI]

    Gonsalves, Anthony

    2012-01-01

    38 fs. Laser and electron beam diagnostics Laser radiationdiagnostic provided charge density images of the electron beam

  11. Effect of polarization and focusing on laser pulse driven auto-resonant particle acceleration

    SciTech Connect (OSTI)

    Sagar, Vikram; Sengupta, Sudip; Kaw, Predhiman [Institute for Plasma Research, Bhat, Gandhinagar-382428 (India)] [Institute for Plasma Research, Bhat, Gandhinagar-382428 (India)

    2014-04-15

    The effect of laser polarization and focusing is theoretically studied on the final energy gain of a particle in the Auto-resonant acceleration scheme using a finite duration laser pulse with Gaussian shaped temporal envelope. The exact expressions for dynamical variables viz. position, momentum, and energy are obtained by analytically solving the relativistic equation of motion describing particle dynamics in the combined field of an elliptically polarized finite duration pulse and homogeneous static axial magnetic field. From the solutions, it is shown that for a given set of laser parameters viz. intensity and pulse length along with static magnetic field, the energy gain by a positively charged particle is maximum for a right circularly polarized laser pulse. Further, a new scheme is proposed for particle acceleration by subjecting it to the combined field of a focused finite duration laser pulse and static axial magnetic field. In this scheme, the particle is initially accelerated by the focused laser field, which drives the non-resonant particle to second stage of acceleration by cyclotron Auto-resonance. The new scheme is found to be efficient over two individual schemes, i.e., auto-resonant acceleration and direct acceleration by focused laser field, as significant particle acceleration can be achieved at one order lesser values of static axial magnetic field and laser intensity.

  12. Electron Beam Charge Diagnostics for Laser Plasma Accelerators

    SciTech Connect (OSTI)

    Nakamura, Kei; Gonsalves, Anthony; Lin, Chen; Smith, Alan; Rodgers, David; Donahue, Rich; Byrne, Warren; Leemans, Wim

    2011-06-27

    A comprehensive study of charge diagnostics is conducted to verify their validity for measuring electron beams produced by laser plasma accelerators (LPAs). First, a scintillating screen (Lanex) was extensively studied using subnanosecond electron beams from the Advanced Light Source booster synchrotron, at the Lawrence Berkeley National Laboratory. The Lanex was cross calibrated with an integrating current transformer (ICT) for up to the electron energy of 1.5 GeV, and the linear response of the screen was confirmed for charge density and intensity up to 160 pC/mm{sup 2} and 0.4 pC/(ps mm{sup 2}), respectively. After the radio-frequency accelerator based cross calibration, a series of measurements was conducted using electron beams from an LPA. Cross calibrations were carried out using an activation-based measurement that is immune to electromagnetic pulse noise, ICT, and Lanex. The diagnostics agreed within {+-}8%, showing that they all can provide accurate charge measurements for LPAs.

  13. Enhancement of injection and acceleration of electrons in a laser wakefield accelerator by using an argon-doped hydrogen gas jet and optically

    E-Print Network [OSTI]

    Enhancement of injection and acceleration of electrons in a laser wakefield accelerator by using of electrons in a gas-jet-based laser wakefield accelerator via ionization of dopant was conducted. The pump-pulse threshold energy for producing a quasi-monoenergetic electron beam was significantly reduced by doping

  14. Effective post-acceleration of ion bunches in foils irradiated by ultra-intense laser pulses

    SciTech Connect (OSTI)

    Andreev, A. A. [Max Born Institute, Max Born Str. 2a, D-12489 Berlin (Germany); Saint Petersburg State University, University Emb. 7-9, 199034 Saint Petersburg (Russian Federation); ELI-ALPS, Dugonics ter. 13 H-6720 Szeged (Hungary); Nickles, P. V. [Max Born Institute, Max Born Str. 2a, D-12489 Berlin (Germany); Center of Relativistic Laser Science, Institute for Basic Science, Gwangju 500-712 (Korea, Republic of); Platonov, K. Yu [Saint Petersburg State Technical University, Politekhnicheskaja 29, 195251 Saint Petersburg (Russian Federation)

    2014-08-15

    Two-step laser acceleration of protons with two foils and two laser pulses is modelled and optimized. It is shown that a nearly mono-energetic distribution of proton bunches can be realized by a suitable parameter choice. Two-step acceleration schemes make it possible to obtain both higher efficiency and energy as compared to the acceleration with only one laser pulse of an energy equal to the sum of the energy of the two pulses. With the aid of our analytical model, the optimal distance between the two targets, the delay between the two laser pulses, and the parameters of the laser pulses are determined. Estimates and results of the modelling are proven with 2D PIC simulations of the acceleration of proton bunches moving through the second target.

  15. Status of the visible Free-Electron Laser at the Brookhaven Accelerator Test Facility

    SciTech Connect (OSTI)

    Batchelor, K.; Ben-Zvi, I.; Fernow, R.C.; Fisher, A.S.; Friedman, A.; Gallardo, J.; Ingold, G.; Kirk, H.; Kramer, S.; Lin, L.; Rogers, J.T.; Sheehan, J.F.; van Steenbergen, A.; Woodle, M.; Xie, J.; Yu, L.H.; Zhang, R. ); Bhowmik, A. . Rocketdyne Div.)

    1991-01-01

    The 500 nm Free-Electron Laser (ATF) of the Brookhaven National Laboratory is reviewed. We present an overview of the ATF, a high-brightness, 50-MeV, electron accelerator and laser complex which is a users' facility for accelerator and beam physics. A number of laser acceleration and FEL experiments are under construction at the ATF. The visible FEL experiment is based on a novel superferric 8.8 mm period undulator. The electron beam parameters, the undulator, the optical resonator, optical and electron beam diagnostics are discussed. The operational status of the experiment is presented. 22 refs., 7 figs.

  16. Ultrafast Diagnostics for Electron Beams from Laser Plasma Accelerators

    E-Print Network [OSTI]

    Matlis, N. H.

    2011-01-01

    Ultrafast Diagnostics for Electron Beams from Laser Plasmadiagnostic techniques [2]. While the field of electron beam

  17. GeV electron beams from a laser-plasma accelerator

    E-Print Network [OSTI]

    2008-01-01

    S. M. Hooker, “Gev electron beams from a centimetre-scaleproducing monoenergetic electron beams,” Nature, vol. 431,GeV electron beams from a laser-plasma accelerator C. B.

  18. All-optical measurement of the hot electron sheath driving laser ion acceleration from thin foils

    E-Print Network [OSTI]

    Jackel, O.

    We present experimental results from an all-optical diagnostic method to directly measure the evolution of the hot-electron distribution driving the acceleration of ions from thin foils using high-intensity lasers. Central ...

  19. Search | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Electron Beam Accelerator SEARCH JEFFERSON LAB Phone Book A-Z Index Departments Search the JLab Web Site Loading...

  20. Numerically optimized structures for dielectric asymmetric dual-grating laser accelerators

    SciTech Connect (OSTI)

    Aimidula, A. [Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China) [Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Cockcroft Institute, Daresbury Sci-Tech, Warrington WA44AD (United Kingdom); Physics Department, University of Liverpool, Liverpool (United Kingdom); Bake, M. A.; Wan, F.; Xie, B. S., E-mail: bsxie@bnu.edu.cn [Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Welsch, C. P. [Cockcroft Institute, Daresbury Sci-Tech, Warrington WA44AD (United Kingdom) [Cockcroft Institute, Daresbury Sci-Tech, Warrington WA44AD (United Kingdom); Physics Department, University of Liverpool, Liverpool (United Kingdom); Xia, G.; Mete, O. [Cockcroft Institute, Daresbury Sci-Tech, Warrington WA44AD (United Kingdom) [Cockcroft Institute, Daresbury Sci-Tech, Warrington WA44AD (United Kingdom); School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Uesaka, M.; Matsumura, Y. [Department of Nuclear Engineering and Management, The University of Tokyo, Tokai 319-1188 (Japan)] [Department of Nuclear Engineering and Management, The University of Tokyo, Tokai 319-1188 (Japan); Yoshida, M.; Koyama, K. [High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801 (Japan)] [High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801 (Japan)

    2014-02-15

    Optical scale dielectric structures are promising candidates to realize future compact, low cost particle accelerators, since they can sustain high acceleration gradients in the range of GeV/m. Here, we present numerical simulation results for a dielectric asymmetric dual-grating accelerator. It was found that the asymmetric dual-grating structures can efficiently modify the laser field to synchronize it with relativistic electrons, therefore increasing the average acceleration gradient by ?10% in comparison to symmetric structures. The optimum pillar height which was determined by simulation agrees well with that estimated analytically. The effect of the initial kinetic energy of injected electrons on the acceleration gradient is also discussed. Finally, the required laser parameters were calculated analytically and a suitable laser is proposed as energy source.

  1. BESTIA - the next generation ultra-fast CO2 laser for advanced accelerator research

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Pogorelsky, Igor V.; Babzien, Markus; Ben-Zvi, Ilan; Skaritka, John; Polyanskiy, Mikhail N.

    2015-12-02

    Over the last two decades, BNL’s ATF has pioneered the use of high-peak power CO2 lasers for research in advanced accelerators and radiation sources. In addition, our recent developments in ion acceleration, Compton scattering, and IFELs have further underscored the benefits from expanding the landscape of strong-field laser interactions deeper into the mid-infrared (MIR) range of wavelengths. This extension validates our ongoing efforts in advancing CO2 laser technology, which we report here. Our next-generation, multi-terawatt, femtosecond CO2 laser will open new opportunities for studying ultra-relativistic laser interactions with plasma in the MIR spectral domain, including new regimes in the particlemore »acceleration of ions and electrons.« less

  2. Multi-MeV electron acceleration by sub-terawatt laser pulses

    E-Print Network [OSTI]

    Goers, A J; Feder, L; Miao, B; Salehi, F; Milchberg, H M

    2015-01-01

    We demonstrate laser-plasma acceleration of high charge electron beams to the ~10 MeV scale using ultrashort laser pulses with as little energy as 10 mJ. This result is made possible by an extremely dense and thin hydrogen gas jet. Total charge up to ~0.5 nC is measured for energies >1 MeV. Acceleration is correlated to the presence of a relativistically self-focused laser filament accompanied by an intense coherent broadband light flash, associated with wavebreaking, which can radiate more than ~3% of the laser energy in a sub-femtosecond bandwidth consistent with half-cycle optical emission. Our results enable truly portable applications of laser-driven acceleration, such as low dose radiography, ultrafast probing of matter, and isotope production.

  3. Test particle simulation of direct laser acceleration in a density-modulated plasma waveguide

    SciTech Connect (OSTI)

    Lin, M.-W.; Jovanovic, I.

    2012-11-15

    Direct laser acceleration (DLA) of electrons by the use of the intense axial electric field of an ultrafast radially polarized laser pulse is a promising technique for future compact accelerators. Density-modulated plasma waveguides can be implemented for guiding the propagation of the laser pulse to extend the acceleration distance and for the quasi-phase-matching between the accelerated electrons and the laser pulse. A test particle model is developed to study the optimal axial density modulation structure of plasma waveguides for laser pulses to efficiently accelerate co-propagating electrons. A simple analytical approach is also presented, which can be used to estimate the energy gain in DLA. The analytical model is validated by the test particle simulation. The effect of injection phase and acceleration of electrons injected at various radial positions are studied. The results indicate that a positively chirped density modulation of the waveguide structure is required to accelerate electron with low initial energies, and can be effectively optimized. A wider tolerance on the injection phase and radial distance from the waveguide axis exists for electrons injected with a higher initial energy.

  4. Education - Students | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - Students Pulse Laser Deposit Hadware Research at Jefferson Lab leads to the development of technology that has practical applications, such as pulse laser deposit hardware...

  5. Transport and Non-Invasive Position Detection of Electron Beams from Laser-Plasma Accelerators

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    transport with miniature permanent quadrupole magnets from the electron source through our THUNDER undulator-beam transport, laser-plasma acceleration, permanent magnet quadrupole, beam-position monitor PACS: 52.38.Kd, 41. Traditionally, in conventional radio-frequency accelerator facilities these magnetic fields are generated

  6. Submillimeter-resolution radiography of shielded structures with laser-accelerated electron beams

    E-Print Network [OSTI]

    Umstadter, Donald

    Submillimeter-resolution radiography of shielded structures with laser-accelerated electron beams (Received 24 March 2010; published 14 October 2010) We investigate the use of energetic electron beams-wakefield accelera- tors have been shown to produce electron beams with source sizes comparable to the laser beam

  7. Efficiency and Energy Spread in Laser-Wakefield Acceleration A. J. W. Reitsma,1

    E-Print Network [OSTI]

    Strathclyde, University of

    Efficiency and Energy Spread in Laser-Wakefield Acceleration A. J. W. Reitsma,1 R. A. Cairns,2 R 2004; published 4 March 2005) The theoretical limits on efficiency and energy spread of the laser. An inherent trade-off between energy spread and efficiency exists. DOI: 10.1103/PhysRevLett.94.085004 PACS

  8. 1 GeV Electron Beams from a Laser-Driven Channel-Guided Accelerator

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    energy lasers. The radiation pressure of an intense laser pulse drives a space charge wave in a plasma [1 particle accelerators for radiation sources, high-energy physics, and other applications are typically machines. A different technology for generating intense energetic electron beams and synchronized

  9. Increased efficiency of ion acceleration by using femtosecond laser pulses at higher harmonic frequency

    SciTech Connect (OSTI)

    Psikal, J., E-mail: jan.psikal@fjfi.cvut.cz [FNSPE, Czech Technical University in Prague, 11519 Prague (Czech Republic); Klimo, O. [FNSPE, Czech Technical University in Prague, 11519 Prague (Czech Republic); ELI-Beamlines Project, Institute of Physics of the ASCR, 18221 Prague (Czech Republic); Weber, S.; Margarone, D. [ELI-Beamlines Project, Institute of Physics of the ASCR, 18221 Prague (Czech Republic)

    2014-07-15

    The influence of laser frequency on laser-driven ion acceleration is investigated by means of two-dimensional particle-in-cell simulations. When ultrashort intense laser pulse at higher harmonic frequency irradiates a thin solid foil, the target may become re lativistically transparent for significantly lower laser pulse intensity compared with irradiation at fundamental laser frequency. The relativistically induced transparency results in an enhanced heating of hot electrons as well as increased maximum energies of accelerated ions and their numbers. Our simulation results have shown the increase in maximum proton energy and increase in the number of high-energy protons by a factor of 2 after the interaction of an ultrashort laser pulse of maximum intensity 7?×?10{sup 21?}W/cm{sup 2} with a fully ionized plastic foil of realistic density and of optimal thickness between 100?nm and 200?nm when switching from the fundamental frequency to the third harmonics.

  10. Injection and acceleration of electron bunch in a plasma wakefield produced by a chirped laser pulse

    SciTech Connect (OSTI)

    Afhami, Saeedeh; Eslami, Esmaeil

    2014-06-15

    An ultrashort laser pulse propagating in plasma can excite a nonlinear plasma wakefield which can trap and accelerate charged particles up to GeV. One-dimensional analysis of electron injection, trapping, and acceleration by different chirped pulses propagating in plasma is investigated numerically. In this paper, we inject electron bunches in front of the chirped pulses. It is indicated that periodical chirped laser pulse can trap electrons earlier than other pulses. It is shown that periodical chirped laser pulses lead to decrease the minimum momentum necessary to trap the electrons. This is due to the fact that periodical chirped laser pulses are globally much efficient than nonchirped pulses in the wakefield generation. It is found that chirped laser pulses could lead to much larger electron energy than that of nonchirped pulses. Relative energy spread has a lower value in the case of periodical chirped laser pulses.

  11. Laser induced electron acceleration in vacuum K. P. Singha)

    E-Print Network [OSTI]

    Singh, Kunwar Pal

    of the laser wave and initial electron energy. The electric field of the laser wave is taken as E x^A0 cos to much higher energies.4,5 In the beat wave scheme, the laser exerts an axial ponderomotive force of Technology, New Delhi-110016, India Received 12 September 2003; accepted 21 November 2003 Electron

  12. 2D electron density profile measurement in tokamak by laser-accelerated ion-beam probe

    SciTech Connect (OSTI)

    Chen, Y. H.; Yang, X. Y.; Lin, C. E-mail: cjxiao@pku.edu.cn; Wang, X. G.; Xiao, C. J. E-mail: cjxiao@pku.edu.cn; Wang, L.; Xu, M.

    2014-11-15

    A new concept of Heavy Ion Beam Probe (HIBP) diagnostic has been proposed, of which the key is to replace the electrostatic accelerator of traditional HIBP by a laser-driven ion accelerator. Due to the large energy spread of ions, the laser-accelerated HIBP can measure the two-dimensional (2D) electron density profile of tokamak plasma. In a preliminary simulation, a 2D density profile was reconstructed with a spatial resolution of about 2 cm, and with the error below 15% in the core region. Diagnostics of 2D density fluctuation is also discussed.

  13. Laser-Driven Shock Acceleration of Ion Beams from Spherical Mass-Limited Targets

    SciTech Connect (OSTI)

    Henig, A.; Kiefer, D.; Hoerlein, R.; Major, Zs.; Krausz, F.; Habs, D. [Max-Planck-Institut fuer Quantenoptik, Garching (Germany); Department fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, Garching (Germany); Geissler, M. [Max-Planck-Institut fuer Quantenoptik, Garching (Germany); Department of Physics and Astronomy, Queen's University Belfast, Belfast BT7 1NN (United Kingdom); Rykovanov, S. G. [Max-Planck-Institut fuer Quantenoptik, Garching (Germany); Moscow Physics Engineering Institute, Kashirskoe shosse 31, Moscow (Russian Federation); Ramis, R. [ETSI Aeronauticos, Universidad Politecnica de Madrid (Spain); Osterhoff, J.; Veisz, L.; Karsch, S. [Max-Planck-Institut fuer Quantenoptik, Garching (Germany); Schreiber, J. [Max-Planck-Institut fuer Quantenoptik, Garching (Germany); Department fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, Garching (Germany); Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom)

    2009-03-06

    We report on experimental studies of ion acceleration from spherical targets of diameter 15 {mu}m irradiated by ultraintense (1x10{sup 20} W/cm{sup 2}) pulses from a 20-TW Ti:sapphire laser system. A highly directed proton beam with plateau-shaped spectrum extending to energies up to 8 MeV is observed in the laser propagation direction. This beam arises from acceleration in a converging shock launched by the laser, which is confirmed by 3-dimensional particle-in-cell simulations. The temporal evolution of the shock-front curvature shows excellent agreement with a two-dimensional radiation pressure model.

  14. Ion Response to Relativistic Electron Bunches in the Blowout Regime of Laser-Plasma Accelerators

    SciTech Connect (OSTI)

    Popov, K. I.; Rozmus, W.; Naseri, N. [Theoretical Physics Institute, University of Alberta, Edmonton T6G 2J1, Alberta (Canada); Bychenkov, V. Yu. [Theoretical Physics Institute, University of Alberta, Edmonton T6G 2J1, Alberta (Canada); P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 119991 (Russian Federation); Capjack, C. E. [Department of Electrical Computer, Engineering, University of Alberta, Edmonton T6G 2J1, Alberta (Canada); Brantov, A. V. [P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 119991 (Russian Federation)

    2010-11-05

    The ion response to relativistic electron bunches in the so called bubble or blowout regime of a laser-plasma accelerator is discussed. In response to the strong fields of the accelerated electrons the ions form a central filament along the laser axis that can be compressed to densities 2 orders of magnitude higher than the initial particle density. A theory of the filament formation and a model of ion self-compression are proposed. It is also shown that in the case of a sharp rear plasma-vacuum interface the ions can be accelerated by a combination of three basic mechanisms. The long time ion evolution that results from the strong electrostatic fields of an electron bunch provides a unique diagnostic of laser-plasma accelerators.

  15. UNDULATOR-BASED LASER WAKEFIELD ACCELERATOR ELECTRON BEAM DIAGNOSTIC

    E-Print Network [OSTI]

    Bakeman, M.S.

    2010-01-01

    ACCELERATOR ELECTRON BEAM DIAGNOSTIC* M.S. Bakeman # , W.M.of an undulator-based electron beam diagnostic to be used in

  16. Vacuum electron acceleration by tightly focused laser pulses with nanoscale targets

    SciTech Connect (OSTI)

    Popov, K. I.; Rozmus, W.; Sydora, R. D. [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); Bychenkov, V. Yu. [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow 119991 (Russian Federation); Bulanov, S. S. [FOCUS Center and Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109 (United States)

    2009-05-15

    Electron acceleration using a tightly focused relativistic short laser pulse interacting with a spherical nanocluster, ultrathin foil or preformed mid-dense plasmas is studied by using three-dimensional particle-in-cell simulations with the Stratton-Chu integrals as the boundary conditions for the incident laser fields. The investigation is performed in the regime where the focal spot size is comparable with the laser wavelength. Generation of high-energy electron multibunch jets with quasimonoenergetic or waterbaglike spectra has been demonstrated. The physical process of acceleration and bunching of the electrons is discussed in detail, as well as particles energy and angular distributions for different laser intensities, focusing optics, target parameters, and laser incidence angles.

  17. Spot size dependence of laser accelerated protons in thin multi-ion foils

    SciTech Connect (OSTI)

    Liu, Tung-Chang, E-mail: tcliu@umd.edu; Shao, Xi; Liu, Chuan-Sheng [Department of Physics, University of Maryland, College Park, Maryland 20742 (United States); Eliasson, Bengt [Department of Physics, University of Maryland, College Park, Maryland 20742 (United States); SUPA, Department of Physics, Strathclyde University, Glasgow G4 0NG (United Kingdom); Wang, Jyhpyng [Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan (China); Department of Physics, National Central University, Taoyuan 32001, Taiwan (China); Chen, Shih-Hung [Department of Physics, National Central University, Taoyuan 32001, Taiwan (China)

    2014-06-15

    We present a numerical study of the effect of the laser spot size of a circularly polarized laser beam on the energy of quasi-monoenergetic protons in laser proton acceleration using a thin carbon-hydrogen foil. The used proton acceleration scheme is a combination of laser radiation pressure and shielded Coulomb repulsion due to the carbon ions. We observe that the spot size plays a crucial role in determining the net charge of the electron-shielded carbon ion foil and consequently the efficiency of proton acceleration. Using a laser pulse with fixed input energy and pulse length impinging on a carbon-hydrogen foil, a laser beam with smaller spot sizes can generate higher energy but fewer quasi-monoenergetic protons. We studied the scaling of the proton energy with respect to the laser spot size and obtained an optimal spot size for maximum proton energy flux. Using the optimal spot size, we can generate an 80?MeV quasi-monoenergetic proton beam containing more than 10{sup 8} protons using a laser beam with power 250?TW and energy 10?J and a target of thickness 0.15 wavelength and 49 critical density made of 90% carbon and 10% hydrogen.

  18. Summary Report of Working Group 1: Laser-Plasma Acceleration

    E-Print Network [OSTI]

    Geddes, C.G.R.

    2011-01-01

    an accurate diagnostic of the electron beam properties, aselectron and laser beam character- istics. New diagnosticselectron beam charge, peak energy and energy spread, and provide diagnostics

  19. Electron Beam Charge Diagnostics for Laser Plasma Accelerators

    E-Print Network [OSTI]

    Nakamura, Kei

    2012-01-01

    Electron Beam Charge Diagnostics for Laser PlasmaElectron beams were sent to the various charge diagnosticselectron spectrometer [27] before sending the e-beam to charge diagnostics,

  20. LASER-PLASMA-ACCELERATOR-BASED COLLIDERS C. B. Schroeder

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    technology that drives the plasma wave to accelerate the electron beam may be used for Compton back of the electron beam at a given phase of the plasma wave [6]. Hence the single-stage energy gain is ultimately is presented. INTRODUCTION Advanced acceleration techniques are actively being pursued to expand the energy

  1. Fission-Fusion: A new reaction mechanism for nuclear astrophysics based on laser-ion acceleration

    SciTech Connect (OSTI)

    Thirolf, P. G.; Gross, M.; Allinger, K.; Bin, J.; Henig, A.; Kiefer, D.; Habs, D.; Ma, W.; Schreiber, J.

    2011-10-28

    We propose to produce neutron-rich nuclei in the range of the astrophysical r-process around the waiting point N = 126 by fissioning a dense laser-accelerated thorium ion bunch in a thorium target (covered by a CH{sub 2} layer), where the light fission fragments of the beam fuse with the light fission fragments of the target. Via the 'hole-boring' mode of laser Radiation Pressure Acceleration using a high-intensity, short pulse laser, very efficiently bunches of {sup 232}Th with solid-state density can be generated from a Th target and a deuterated CD{sub 2} foil, both forming the production target assembly. Laser-accelerated Th ions with about 7 MeV/u will pass through a thin CH{sub 2} layer placed in front of a thicker second Th foil (both forming the reaction target) closely behind the production target and disintegrate into light and heavy fission fragments. In addition, light ions (d,C) from the CD{sub 2} layer of the production target will be accelerated as well, inducing the fission process of {sup 232}Th also in the second Th layer. The laser-accelerated ion bunches with solid-state density, which are about 10{sup 14} times more dense than classically accelerated ion bunches, allow for a high probability that generated fission products can fuse again. The high ion beam density may lead to a strong collective modification of the stopping power, leading to significant range and thus yield enhancement. Using a high-intensity laser as envisaged for the ELI-Nuclear Physics project in Bucharest (ELI-NP), order-of-magnitude estimates promise a fusion yield of about 10{sup 3} ions per laser pulse in the mass range of A = 180-190, thus enabling to approach the r-process waiting point at N = 126.

  2. Laser acceleration of protons using multi-ion plasma gaseous targets

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Liu, Tung -Chang; Shao, Xi; Liu, Chuan -Sheng; Eliasson, Bengt; Strathclyde Univ., Glasgow; Hill, III, W. T.; Wang, Jyhpyng; National Central Univ., Taoyuan; Chen, Shih -Hung

    2015-02-01

    We present a theoretical and numerical study of a novel acceleration scheme by applying a combination of laser radiation pressure and shielded Coulomb repulsion in laser acceleration of protons in multi-species gaseous targets. By using a circularly polarized CO? laser pulse with a wavelength of 10 ?m—much greater than that of a Ti: Sapphire laser—the critical density is significantly reduced, and a high-pressure gaseous target can be used to achieve an overdense plasma. This gives us a larger degree of freedom in selecting the target compounds or mixtures, as well as their density and thickness profiles. By impinging such amore »laser beam on a carbon–hydrogen target, the gaseous target is first compressed and accelerated by radiation pressure until the electron layer disrupts, after which the protons are further accelerated by the electron-shielded carbon ion layer. An 80 MeV quasi-monoenergetic proton beam can be generated using a half-sine shaped laser beam with a peak power of 70 TW and a pulse duration of 150 wave periods.« less

  3. Theory Challenges of the Accelerating Universe

    E-Print Network [OSTI]

    Linder, Eric V.

    2009-01-01

    of the accelerating universe. Acknowledgments I thankof the Accelerating Universe Eric V. Linder Berkeley Lab,of the Accelerating Universe Eric V. Linder Berkeley Lab,

  4. The phase-lock dynamics of the laser wakefield acceleration with an intensity-decaying laser pulse

    SciTech Connect (OSTI)

    Li, Wentao; Liu, Jiansheng Wang, Wentao; Zhang, Zhijun; Chen, Qiang; Tian, Ye; Qi, Rong; Yu, Changhai; Wang, Cheng; Li, Ruxin Xu, Zhizhan; Tajima, T.

    2014-03-03

    An electron beam with the maximum energy extending up to 1.8?GeV, much higher than the dephasing limit, is experimentally obtained in the laser wakefield acceleration with the plasma density of 3.5?×?10{sup 18}?cm{sup ?3}. With particle in cell simulations and theoretical analysis, we find that the laser intensity evolution plays a major role in the enhancement of the electron energy gain. While the bubble length decreases due to the intensity-decay of the laser pulse, the phase of the electron beam in the wakefield can be locked, which contributes to the overcoming of the dephasing. Moreover, the laser intensity evolution is described for the phase-lock acceleration of electrons in the uniform plasma, confirmed with our own simulation. Since the decaying of the intensity is unavoidable in the long distance propagation due to the pump depletion, the energy gain of the high energy laser wakefield accelerator can be greatly enhanced if the current process is exploited.

  5. The analytic model of a laser-accelerated plasma target and its stability

    SciTech Connect (OSTI)

    Khudik, V. Yi, S. A.; Siemon, C.; Shvets, G.

    2014-01-15

    A self-consistent kinetic theory of a laser-accelerated plasma target with distributed electron/ion densities is developed. The simplified model assumes that after an initial transition period the bulk of cold ions are uniformly accelerated by the self-consistent electric field generated by hot electrons trapped in combined ponderomotive and electrostatic potentials. Several distinct target regions (non-neutral ion tail, non-neutral electron sheath, and neutral plasma bulk) are identified and analytically described. It is shown analytically that such laser-accelerated finite-thickness target is susceptible to Rayleigh-Taylor (RT) instability. Particle-in-cell simulations of the seeded perturbations of the plasma target reveal that, for ultra-relativistic laser intensities, the growth rate of the RT instability is depressed from the analytic estimates.

  6. Magnetic Field Generation and Electron Acceleration in Relativistic Laser Channel

    SciTech Connect (OSTI)

    I.Yu. Kostyukov; G. Shvets; N.J. Fisch; J.M. Rax

    2001-12-12

    The interaction between energetic electrons and a circularly polarized laser pulse inside an ion channel is studied. Laser radiation can be resonantly absorbed by electrons executing betatron oscillations in the ion channel and absorbing angular momentum from the laser. The absorbed angular momentum manifests itself as a strong axial magnetic field (inverse Faraday effect). The magnitude of this magnetic field is calculated and related to the amount of the absorbed energy. Absorbed energy and generated magnetic field are estimated for the small and large energy gain regimes. Qualitative comparisons with recent experiments are also made.

  7. LASER-PLASMA-ACCELERATOR-BASED GAMMA GAMMA COLLIDERS

    E-Print Network [OSTI]

    Schroeder, C. B.

    2010-01-01

    Total accelerator wall-plug power (MW) Compton scatteringn ?1/2 and the total wall plug power for the accelerationcolliders limit the wall plug power to on the order of

  8. Laser polishing of niobium for superconducting radio-frequency accelerator applications

    SciTech Connect (OSTI)

    Zhao, Liang [William and Mary College; Klopf, John M. [William and Mary College; Reece, Charles E. [JLAB; Kelley, Michael J. [JLAB

    2014-08-01

    Interior surfaces of niobium cavities used in superconducting radio frequency accelerators are now obtained by buffered chemical polish and/or electropolish. Laser polishing is a potential alternative, having advantages of speed, freedom from noxious chemistry and availability of in-process inspection. We studied the influence of the laser power density and laser beam raster rate on the surface topography. These two factors need to be combined carefully to smooth the surface without damage. Computational modeling was used to estimate the surface temperature and gain insight into the mechanism of laser polishing. Power spectral density analysis of surface topography measurements shows that laser polishing can produce smooth topography similar to that obtained by electropolish. This is a necessary first step toward introducing laser polishing as an alternative to the currently practiced chemical polishing.

  9. Dual effects of stochastic heating on electron injection in laser wakefield acceleration

    SciTech Connect (OSTI)

    Deng, Z. G.; Wang, X. G., E-mail: wangxg@snnu.edu.cn [Department of Physics, Zhejiang University, Hangzhou 310027 (China); School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062 (China); Yang, L. [Department of Physics, Zhejiang University, Hangzhou 310027 (China); Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027 (China); Zhou, C. T. [Institute of Applied Physics and Computational Mathematics, Beijing 100094 (China); Yu, M. Y. [Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027 (China); Ying, H. P. [Department of Physics, Zhejiang University, Hangzhou 310027 (China)

    2014-08-15

    Electron injection into the wakefield of an intense short laser pulse by a weaker laser pulse propagating in the opposite direction is reconsidered using two-dimensional (2D) particle-in-cell simulations as well as analytical modeling. It is found that for linearly polarized lasers the injection efficiency and the quality of the wakefield accelerated electrons increase with the intensity of the injection laser only up to a certain level, and then decreases. Theory and simulation tracking test electrons originally in the beat region of the two laser pulses show that the reduction of the injection efficiency at high injection-laser intensities is caused by stochastic overheating of the affected electrons.

  10. Automatic Beam Path Analysis of Laser Wakefield Particle Acceleration Data

    E-Print Network [OSTI]

    Rubel, Oliver

    2010-01-01

    A. Hakim, R¨ bel et al. Automatic Beam Path Analysis of399, 1976. R¨ bel et al. Automatic Beam Path Analysis ofAutomatic Beam Path Analysis of Laser Wake?eld Particle

  11. Electron acceleration by linearly polarized twisted laser pulse with narrow divergence

    SciTech Connect (OSTI)

    Vaziri, Mohammad Sohaily, Sozha; Golshani, Mojtaba; Bahrampour, Alireza

    2015-03-15

    We numerically investigate the vacuum electron acceleration by a high-intensity linearly polarized twisted laser pulse. It is shown that the inherent spiral structure of a Laguerre-Gaussian laser pulse leads to improvement in trapping and acceleration of an electron to energies of the order of GeV in the off-axis case. Also, it is demonstrated that by employing a proper choice of initial injection parameters, the high-energetic electrons with very small scattering angles can be produced.

  12. Towards radiation pressure acceleration of protons using linearly polarized ultrashort petawatt laser pulses

    E-Print Network [OSTI]

    Kim, I Jong; Kim, Chul Min; Kim, Hyung Taek; Sung, Jae Hee; Lee, Seong Ku; Yu, Tae Jun; Choi, Il Woo; Lee, Chang-Lyoul; Nam, Kee Hwan; Nickles, Peter V; Jeong, Tae Moon; Lee, Jongmin

    2013-01-01

    Particle acceleration using ultraintense, ultrashort laser pulses is one of the most attractive topics in relativistic laser-plasma research. We report proton/ion acceleration in the intensity range of 5x1019 W/cm2 to 3.3x1020 W/cm2 by irradiating linearly polarized, 30-fs, 1-PW laser pulses on 10- to 100-nm-thick polymer targets. The proton energy scaling with respect to the intensity and target thickness was examined. The experiments demonstrated, for the first time with linearly polarized light, a transition from the target normal sheath acceleration to radiation pressure acceleration and showed a maximum proton energy of 45 MeV when a 10-nm-thick target was irradiated by a laser intensity of 3.3x1020 W/cm2. The experimental results were further supported by two- and three-dimensional particle-in-cell simulations. Based on the deduced proton energy scaling, proton beams having an energy of ~ 200 MeV should be feasible at a laser intensity of 1.5x1021 W/cm2.

  13. Electron acceleration in cavitated laser produced ion channels

    SciTech Connect (OSTI)

    Naseri, N. [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada) [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); Tech-X Corporation, Boulder, Colorado 80303 (United States); Pesme, D. [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada) [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada); Centre de Physique Théorique, CNRS, Ecole Polytechnique, 91128 Palaiseau Cedex (France); Rozmus, W. [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada)] [Theoretical Physics Institute, University of Alberta, Edmonton, Alberta T6G 2J1 (Canada)

    2013-10-15

    This paper is concerned with the channeling of a relativistic laser pulse in an underdense plasma and with the subsequent generation of fast electrons in the cavitated ion channel. The laser pulse has a duration of several hundreds of femtoseconds and its power P{sub L} exceeds the critical power for laser channeling P{sub ch}, with P{sub ch}?1.1P{sub c}, P{sub c} denoting the critical power for relativistic self-focusing. The laser pulse is focused in a plasma of electron density n{sub 0} such that the ratio n{sub 0}/n{sub c} lies in the interval [10{sup ?3},10{sup ?1}], n{sub c} denoting the critical density. The laser-plasma interaction under such conditions is investigated by means of three dimensional Particle-In-Cell (PIC) simulations. It is observed that the steep laser front gives rise to the excitation of a surface wave which propagates along the sharp radial boundaries of the electron free channel created by the laser pulse. The mechanism responsible for the generation of relativistic electrons observed in the PIC simulations is also analyzed by means of a test particles code. The fast electrons are found to be generated by the combination of a surface wave and of the betatron resonance. The maximum electron energy observed in the simulations is scaled as a function of P{sub L}/P{sub c}; it reaches 350–600 MeV for P{sub L}/P{sub c} = 70–140.

  14. Detailed dynamics of electron beams self-trapped and accelerated in a self-modulated laser wakefield

    E-Print Network [OSTI]

    Umstadter, Donald

    Detailed dynamics of electron beams self-trapped and accelerated in a self-modulated laser 1999 The electron beam generated in a self-modulated laser-wakefield accelerator is characterized, was measured for 2 MeV electrons. The electron beam was observed to have a multicomponent beam profile

  15. Proposed structure for a crossed-laser beam, GeV per meter gradient, vacuum electron linear accelerator

    E-Print Network [OSTI]

    Byer, Robert L.

    Proposed structure for a crossed-laser beam, GeV per meter gradient, vacuum electron linear We propose a dielectric-based, multistaged, laser-driven electron linear accelerator structure operating in a vacuum that is capable of accelerating electrons to 1 TeV in 1 km. Our study shows that a Ge

  16. Laser Wakefield Acceleration: Structural and Dynamic Studies. Final Technical Report ER40954

    SciTech Connect (OSTI)

    Downer, Michael C.

    2014-12-19

    Particle accelerators enable scientists to study the fundamental structure of the universe, but have become the largest and most expensive of scientific instruments. In this project, we advanced the science and technology of laser-plasma accelerators, which are thousands of times smaller and less expensive than their conventional counterparts. In a laser-plasma accelerator, a powerful laser pulse exerts light pressure on an ionized gas, or plasma, thereby driving an electron density wave, which resembles the wake behind a boat. Electrostatic fields within this plasma wake reach tens of billions of volts per meter, fields far stronger than ordinary non-plasma matter (such as the matter that a conventional accelerator is made of) can withstand. Under the right conditions, stray electrons from the surrounding plasma become trapped within these “wake-fields”, surf them, and acquire energy much faster than is possible in a conventional accelerator. Laser-plasma accelerators thus might herald a new generation of compact, low-cost accelerators for future particle physics, x-ray and medical research. In this project, we made two major advances in the science of laser-plasma accelerators. The first of these was to accelerate electrons beyond 1 gigaelectronvolt (1 GeV) for the first time. In experimental results reported in Nature Communications in 2013, about 1 billion electrons were captured from a tenuous plasma (about 1/100 of atmosphere density) and accelerated to 2 GeV within about one inch, while maintaining less than 5% energy spread, and spreading out less than ½ milliradian (i.e. ½ millimeter per meter of travel). Low energy spread and high beam collimation are important for applications of accelerators as coherent x-ray sources or particle colliders. This advance was made possible by exploiting unique properties of the Texas Petawatt Laser, a powerful laser at the University of Texas at Austin that produces pulses of 150 femtoseconds (1 femtosecond is 10-15 seconds) in duration and 150 Joules in energy (equivalent to the muzzle energy of a small pistol bullet). This duration was well matched to the natural electron density oscillation period of plasma of 1/100 atmospheric density, enabling efficient excitation of a plasma wake, while this energy was sufficient to drive a high-amplitude wake of the right shape to produce an energetic, collimated electron beam. Continuing research is aimed at increasing electron energy even further, increasing the number of electrons captured and accelerated, and developing applications of the compact, multi-GeV accelerator as a coherent, hard x-ray source for materials science, biomedical imaging and homeland security applications. The second major advance under this project was to develop new methods of visualizing the laser-driven plasma wake structures that underlie laser-plasma accelerators. Visualizing these structures is essential to understanding, optimizing and scaling laser-plasma accelerators. Yet prior to work under this project, computer simulations based on estimated initial conditions were the sole source of detailed knowledge of the complex, evolving internal structure of laser-driven plasma wakes. In this project we developed and demonstrated a suite of optical visualization methods based on well-known methods such as holography, streak cameras, and coherence tomography, but adapted to the ultrafast, light-speed, microscopic world of laser-driven plasma wakes. Our methods output images of laser-driven plasma structures in a single laser shot. We first reported snapshots of low-amplitude laser wakes in Nature Physics in 2006. We subsequently reported images of high-amplitude laser-driven plasma “bubbles”, which are important for producing electron beams with low energy spread, in Physical Review Letters in 2010. More recently, we have figured out how to image laser-driven structures that change shape while propagating in a single laser shot. The latter techniques, which use the methods of computerized tomography, were demonstrated on test objects – e.g. laser-d

  17. Laser ion acceleration by using the dynamic motion of a target

    SciTech Connect (OSTI)

    Morita, Toshimasa

    2013-09-15

    Proton acceleration by using a 620 TW, 18 J laser pulse of peak intensity of 5×10{sup 21} W/cm{sup 2} irradiating a disk target is examined using three-dimensional particle-in-cell simulations. It is shown that protons are accelerated efficiently to high energy for a “light” material in the first layer of a double-layer target, because a strongly inhomogeneous expansion of the first layer occurs by a Coulomb explosion within such a material. Moreover, a large movement of the first layer for the accelerated protons is produced by radiation-pressure-dominant acceleration. A time-varying electric potential produced by this expanding and moving ion cloud accelerates protons effectively. In addition, using the best material for the target, one can generate a proton beam with an energy of 200 MeV and an energy spread of 2%.

  18. PERFORMANCE OF CAPILLARY DISCHARGE GUIDED LASER PLASMA WAKEFIELD ACCELERATOR

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    -injection causes increased beam loading leading to broadband lower energy electron beam generation. The trigger] because the characteristic scale length of the accelerating structure is the plasma wave- length, which of Tokyo, Japan EXPERIMENTAL SETUP The schematic of the CDG-LWFA and the diagnostic system is shown in Fig

  19. Characteristics of an envelope model for laser-plasma accelerator simulation

    SciTech Connect (OSTI)

    Cowan, Benjamin M., E-mail: benc@txcorp.co [Tech-X Corporation, Boulder, CO 80303 (United States); Bruhwiler, David L., E-mail: bruhwile@txcorp.co [Tech-X Corporation, Boulder, CO 80303 (United States); Cormier-Michel, Estelle, E-mail: ecormier@txcorp.co [Tech-X Corporation, Boulder, CO 80303 (United States); LOASIS Program, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Esarey, Eric, E-mail: EHEsarey@lbl.go [LOASIS Program, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Geddes, Cameron G.R., E-mail: CGRGeddes@lbl.go [LOASIS Program, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Messmer, Peter, E-mail: messmer@txcorp.co [Tech-X Corporation, Boulder, CO 80303 (United States); Paul, Kevin M., E-mail: kpaul@txcorp.co [Tech-X Corporation, Boulder, CO 80303 (United States)

    2011-01-01

    Simulation of laser-plasma accelerator (LPA) experiments is computationally intensive due to the disparate length scales involved. Current experiments extend hundreds of laser wavelengths transversely and many thousands in the propagation direction, making explicit PIC simulations enormously expensive and requiring massively parallel execution in 3D. Simulating the next generation of LPA experiments is expected to increase the computational requirements yet further, by a factor of 1000. We can substantially improve the performance of LPA simulations by modeling the envelope evolution of the laser field rather than the field itself. This allows for much coarser grids, since we need only resolve the plasma wavelength and not the laser wavelength, and therefore larger timesteps can be used. Thus an envelope model can result in savings of several orders of magnitude in computational resources. By propagating the laser envelope in a Galilean frame moving at the speed of light, dispersive errors can be avoided and simulations over long distances become possible. The primary limitation to this envelope model is when the laser pulse develops large frequency shifts, and thus the slowly-varying envelope assumption is no longer valid. Here we describe the model and its implementation, and show rigorous benchmarks for the algorithm, establishing second-order convergence and correct laser group velocity. We also demonstrate simulations of LPA phenomena such as self-focusing and meter-scale acceleration stages using the model.

  20. Summary Report of Working Group 1: Laser-Plasma Acceleration

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    by the laser recently has been demonstrated to produce intense beams of electrons at MeV-GeV energies was on control, detailed diagnostics and physics models, and technological tools to work towards the beam needed? (Joint with computational working group) In addition, techniques for controlling electron beam

  1. Beamstrahlung considerations in laser-plasma-accelerator-based linear colliders

    E-Print Network [OSTI]

    Schroeder, Carl

    2013-01-01

    1/2 ? ?2 n 1/2 Total AC power, P wall laser to the beam ? Lpn 3/4 n 1/2 Total AC power, P wall n ?1 n ?1/2 n ?1/4 Bunchbeam) [%] Total wall-plug power, P wall [GW] Energy, center-

  2. MeV electrons accelerated backward along laser axis from low energy, high intensity laser-water interactions

    E-Print Network [OSTI]

    Feister, Scott; Morrison, John T; Frische, Kyle D; Orban, Chris; Ngirmang, Gregory; Handler, Abraham; Schillaci, Mark; Chowdhury, Enam A; Freeman, R R; Roquemore, W M

    2015-01-01

    Direct electron spectrum measurements show MeV energy electrons generated backward along the laser axis by a $\\lambda =$ 780 nm, 40 fs, 2.9 mJ short-pulse laser ($1.5 \\cdot 10^{18}$ W/cm$^2$). Electrons pass through a 3 mm hole in the center of the final off-axis paraboloid (OAP) and are characterized by a magnetic spectrometer. The charge collected at the OAP is hundreds of pC per pulse. A mechanism for this super-ponderomotive backward electron acceleration is discussed in the framework of 3D Particle-in-cell simulations.

  3. Public Reading Room | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    A Seven-Cell Niobium Cavity At the heart of Jefferson Lab's accelerator are cavities made of niobium. New seven-cell cavities are being installed in the accelerator as the lab...

  4. STABLE, MONOENERGETIC 50-400 MeV ELECTRON BEAMS WITH A MATCHED LASER WAKEFIELD ACCELERATOR

    E-Print Network [OSTI]

    Umstadter, Donald

    STABLE, MONOENERGETIC 50-400 MeV ELECTRON BEAMS WITH A MATCHED LASER WAKEFIELD ACCELERATOR Sudeep-monoenergetic electron beams from under- dense plasmas. Several groups have reported generating high-energy electron, and robustness. Our results demonstrate for the first time the generation of 300 - 400 MeV electron beams

  5. GeV ELECTRON BEAMS FROM A CENTIMETER-SCALE LASER-DRIVEN PLASMA ACCELERATOR

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    GeV ELECTRON BEAMS FROM A CENTIMETER-SCALE LASER-DRIVEN PLASMA ACCELERATOR A. J. Gonsalves, K discharge waveguide [1, 2]. Electron beams were not observed without a plasma channel, indicating that self of the electron beam spectra, and the dependence of the reliability of pro- ducing electron beams as a function

  6. Magnetic-field generation and electron acceleration in relativistic laser channel

    E-Print Network [OSTI]

    is calculated and related to the amount of the absorbed energy. Absorbed energy and generated magnetic field include fast electron and ion generation,1­5 indicating that ultra-strong electric fields are producedMagnetic-field generation and electron acceleration in relativistic laser channel I. Yu. Kostyukov

  7. 2006 - 11 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    162006 - 1:00am Jefferson Lab attracts record numbers to Geant4 workshop (Cern Courier) Sun, 11122006 - 1:00am Jefferson Lab laser sets power record (Richmond Times-Dispatch)...

  8. Research | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Laser. A D D I T I O N A L L I N K S: Read more Nuclear Imaging Research Jefferson Lab's Radiation Detector and Imaging Group Members of Jefferson Lab's Radiation Detector &...

  9. 2006 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2006 - 12:00am Jefferson Lab attracts record numbers to Geant4 workshop (Cern Courier) Sun, 11122006 - 12:00am Jefferson Lab laser sets power record (Richmond Times-Dispatch)...

  10. Laser-seeded modulation instability in a proton driver plasma wakefield accelerator

    SciTech Connect (OSTI)

    Siemon, Carl; Khudik, Vladimir; Austin Yi, S.; Shvets, Gennady; Pukhov, Alexander

    2013-10-15

    A new method for initiating the modulation instability (MI) of a proton beam in a proton driver plasma wakefield accelerator using a short laser pulse preceding the beam is presented. A diffracting laser pulse is used to produce a plasma wave that provides a seeding modulation of the proton bunch with the period equal to that of the plasma wave. Using the envelope description of the proton beam, this method of seeding the MI is analytically compared with the earlier suggested seeding technique that involves an abrupt truncation of the proton bunch. The full kinetic simulation of a realistic proton bunch is used to validate the analytic results. It is further used to demonstrate that a plasma density ramp placed in the early stages of the laser-seeded MI leads to its stabilization, resulting in sustained accelerating electric fields (of order several hundred MV/m) over long propagation distances (?100–1000 m)

  11. Acceleration and Compression of Charged Particle Bunches Using Counter-Propagating Laser Beams

    SciTech Connect (OSTI)

    G. Shvets; N. J. Fisch; A. Pukhov

    2000-10-17

    The nonlinear interaction between counter-propagating laser beams in a plasma results in the generation of large (enhanced) plasma wakes. The two beams need to be slightly detuned in frequency, and one of them has to be ultra-short (shorter than a plasma period). Thus produced wakes have a phase velocity close to the speed of light and can be used for acceleration and compression of charged bunches. The physical mechanism responsible for the enhanced wake generation is qualitatively described and compared with the conventional laser wakefield mechanism. The authors also demonstrate that, depending on the sign of the frequency difference between the lasers, the enhanced wake can be used as a ``snow-plow'' to accelerate and compress either positively or negatively charged bunches. This ability can be utilized in an electron-positron injector.

  12. Enhanced target normal sheath acceleration based on the laser relativistic self-focusing

    SciTech Connect (OSTI)

    Zou, D. B.; Zhuo, H. B., E-mail: hongbin.zhuo@gmail.com; Yang, X. H.; Shao, F. Q.; Ma, Y. Y.; Yu, T. P.; Yin, Y.; Ge, Z. Y.; Li, X. H. [College of Science, National University of Defense Technology, Changsha 410073 (China); Wu, H. C. [Institute for Fusion Theory and Simulation and Department of Physics, Zhejiang University, Hangzhou 310027 (China)

    2014-06-15

    The enhanced target normal sheath acceleration of ions in laser target interaction via the laser relativistic self-focusing effect is investigated by theoretical analysis and particle-in-cell simulations. The temperature of the hot electrons in the underdense plasma is greatly increased due to the occurrence of resonant absorption, while the electron-betatron-oscillation frequency is close to its witnessed laser frequency [Pukhov et al., Phys. Plasma 6, 2847 (1999)]. While these hot electrons penetrate through the backside solid target, a stronger sheath electric field at the rear surface of the target is induced, which can accelerate the protons to a higher energy. It is also shown that the optimum length of the underdense plasma is approximately equal to the self-focusing distance.

  13. Laser pulse propagation in inhomogeneous magnetoplasma channels and wakefield acceleration

    SciTech Connect (OSTI)

    Sharma, B. S., E-mail: bs-phy@yahoo.com; Jain, Archana [Government College Kota, Kota 324001 (India)] [Government College Kota, Kota 324001 (India); Jaiman, N. K. [Department of Pure and Applied Physics, University of Kota, Kota 324010 (India)] [Department of Pure and Applied Physics, University of Kota, Kota 324010 (India); Gupta, D. N. [Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India)] [Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India); Jang, D. G.; Suk, H. [Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of)] [Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of); Kulagin, V. V. [Sternberg Astronomical Institute of Moscow State University, Moscow 119992 (Russian Federation)] [Sternberg Astronomical Institute of Moscow State University, Moscow 119992 (Russian Federation)

    2014-02-15

    Wakefield excitation in a preformed inhomogeneous parabolic plasma channel by an intense relativistic (?10{sup 19}?W/cm{sup 2}) circularly polarized Gaussian laser pulse is investigated analytically and numerically in the presence of an external longitudinal magnetic field. A three dimensional envelope equation for the evolution of the laser pulse is derived, which includes the effect of the nonparaxial and applied external magnetic field. A relation for the channel radius with the laser spot size is derived and examines numerically to see the external magnetic field effect. It is observed that the channel radius depends on the applied external magnetic field. An analytical expression for the wakefield is derived and validated with the help of a two dimensional particle in cell (2D PIC) simulation code. It is shown that the electromagnetic nature of the wakes in an inhomogeneous plasma channel makes their excitation nonlocal, which results in change of fields with time and external magnetic field due to phase mixing of the plasma oscillations with spatially varying frequencies. The magnetic field effect on perturbation of the plasma density and decreasing length is also analyzed numerically. In addition, it has been shown that the electron energy gain in the inhomogeneous parabolic magnetoplasma channel can be increased significantly compared with the homogeneous plasma channel.

  14. Modeling Laser Wakefield Accelerators in a Lorentz Boosted Frame

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework uses concrete7 AssessmentBusinessAlternativeModelModeling Laser

  15. Resources | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resources Resources Machine Control Center Display Jefferson Lab's accelerator is operated from the Machine Control Center. The MCC features a full-wall display that allows...

  16. Resources | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Resources Machine Control Center Display Jefferson Lab's accelerator is operated from the Machine Control Center. The MCC features a full-wall display that allows operators to...

  17. 2005 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 2005 Wed, 05182005 - 5:50pm Jefferson Lab Builds First Single Crystal Single Cell Accelerating Cavity Mon, 05022005 - 2:00pm Governor's Distinguished CEBAF Professorship...

  18. Weak Interaction | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Weak Interaction February 22, 2011 Jefferson Lab has an accelerator designed to do incisive medium energy physics. This program is dominated by experiments aimed at developing our...

  19. Org Charts | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    orgANIZATION Charts Jefferson Lab Organizational Chart 12 GeV Project Organization Accelerator Operations, Research & Development Division Chief Operating Officer Chief Financial...

  20. Helium-3 and Helium-4 acceleration by high power laser pulses for hadron therapy

    E-Print Network [OSTI]

    Bulanov, S S; Schroeder, C B; Leemans, W P; Bulanov, S V; Margarone, D; Korn, G; Haberer, T

    2015-01-01

    The laser driven acceleration of ions is considered a promising candidate for an ion source for hadron therapy of oncological diseases. Though proton and carbon ion sources are conventionally used for therapy, other light ions can also be utilized. Whereas carbon ions require 400 MeV per nucleon to reach the same penetration depth as 250 MeV protons, helium ions require only 250 MeV per nucleon, which is the lowest energy per nucleon among the light ions. This fact along with the larger biological damage to cancer cells achieved by helium ions, than that by protons, makes this species an interesting candidate for the laser driven ion source. Two mechanisms (Magnetic Vortex Acceleration and hole-boring Radiation Pressure Acceleration) of PW-class laser driven ion acceleration from liquid and gaseous helium targets are studied with the goal of producing 250 MeV per nucleon helium ion beams that meet the hadron therapy requirements. We show that He3 ions, having almost the same penetration depth as He4 with the ...

  1. Advanced laser particle accelerator development at LANL: from fast ignition to radiation oncology

    SciTech Connect (OSTI)

    Flippo, Kirk A [Los Alamos National Laboratory; Gaillard, Sandrine A [Los Alamos National Laboratory; Offermann, D T [Los Alamos National Laboratory; Cobble, J A [Los Alamos National Laboratory; Schmitt, M J [Los Alamos National Laboratory; Gautier, D C [Los Alamos National Laboratory; Kwan, T J T [Los Alamos National Laboratory; Montgomery, D S [Los Alamos National Laboratory; Kluge, Thomas [FZD-GERMANY; Bussmann, Micheal [FZD-GERMANY; Bartal, T [UCSD; Beg, F N [UCSD; Gall, B [UNIV OF MISSOURI; Geissel, M [SNL; Korgan, G [NANOLABZ; Kovaleski, S [UNIV OF MISSOURI; Lockard, T [UNIV OF NEVADA; Malekos, S [NANOLABZ; Schollmeier, M [SNL; Sentoku, Y [UNIV OF NEVADA; Cowan, T E [FZD-GERMANY

    2010-01-01

    Laser-plasma accelerated ion and electron beam sources are an emerging field with vast prospects, and promise many superior applications in a variety of fields such as hadron cancer therapy, compact radioisotope generation, table-top nuclear physics, laboratory astrophysics, nuclear forensics, waste transmutation, SN M detection, and inertial fusion energy. LANL is engaged in several projects seeking to develop compact high current and high energy ion and electron sources. We are especially interested in two specific applications: ion fast ignition/capsule perturbation and radiation oncology in conjunction with our partners at the ForschungsZentrum Dresden-Rossendorf (FZD). Laser-to-beam conversion efficiencies of over 10% are needed for practical applications, and we have already shown inherent etliciencies of >5% from flat foils, on Trident using only a 5th of the intensity and energy of the Nova Petawatt. With clever target designs, like structured curved cone targets, we have also been able to achieve major ion energy gains, leading to the highest energy laser-accelerated proton beams in the world. These new target designs promise to help usher in the next generation of particle sources realizing the potential of laser-accelerated beams.

  2. Remediation of the Melton Valley Watershed at Oak Ridge National Lab: An Accelerated Closure Success Story

    SciTech Connect (OSTI)

    Johnson, Ch.; Cange, J. [Bechtel Jacobs Company, LLC, Oak Ridge, TN (United States); Skinner, R. [U.S. DOE, Oak Ridge Operations Office, Oak Ridge, TN (United States); Adams, V. [U.S. DOE, Office of Groundwater and Soil Remediation, Washington, DC (United States)

    2008-07-01

    The Melton Valley (MV) Watershed at the U. S. Department of Energy's (DOE's) Oak Ridge National Laboratory (ORNL) encompasses approximately 430 hectares (1062 acres). Historic operations at ORNL produced a diverse legacy of contaminated facilities and waste disposal areas in the valley. In addition, from 1955 to 1963, ORNL served as a major disposal site for wastes from over 50 off-site government-sponsored installations, research institutions, and other isotope users. Contaminated areas in the watershed included burial grounds, landfills, underground tanks, surface impoundments, liquid disposal pits/trenches, hydro-fracture wells, leak and spill sites, inactive surface structures, and contaminated soil and sediment. Remediation of the watershed in accordance with the requirements specified in the Melton Valley Record of Decision (ROD) for Interim Actions in Melton Valley, which estimated that remedial actions specified in the ROD would occur over a period of 14 years, with completion by FY 2014. Under the terms of the Accelerated Closure Contract between DOE and its contractor, Bechtel Jacobs Company, LLC, the work was subdivided into 14 separate sub-projects which were completed between August 2001 and September 2006, 8 years ahead of the original schedule. (authors)

  3. Simulation of the relativistic electron dynamics and acceleration in a linearly-chirped laser pulse

    E-Print Network [OSTI]

    Jisrawi, Najeh M; Salamin, Yousef I

    2014-01-01

    Theoretical investigations are presented, and their results are discussed, of the laser acceleration of a single electron by a chirped pulse. Fields of the pulse are modeled by simple plane-wave oscillations and a $\\cos^2$ envelope. The dynamics emerge from analytic and numerical solutions to the relativistic Lorentz-Newton equations of motion of the electron in the fields of the pulse. All simulations have been carried out by independent Mathematica and Python codes, with identical results. Configurations of acceleration from a position of rest as well as from injection, axially and sideways, at initial relativistic speeds are studied.

  4. Spectral properties of laser-accelerated mid-Z MeV/u ion beams

    SciTech Connect (OSTI)

    Hegelich, B.M.; Albright, B.; Cobble, J.; Gautier, C.; Johnson, R.; Letzring, S.; Fernandez, J.C. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Audebert, P.; Fuchs, J. [Laboratoire pour l'Utilisation des Lasers Intenses, Ecole Polytechnique, 91128 Palaiseau (France); Blazevic, A.; Brambrink, E.; Geissel, M.; Roth, M. [Technische Universitaet Darmstadt, 64289 Darmstadt (Germany); Cowan, T.; Kemp, A. [Physics Department, MS-220, University of Nevada, Reno, Nevada 89557 (United States); Gauthier, J.C. [Centre Lasers Intenses et Applications (CELIA), UMR 5107 CNRS, Universite Bordeaux 1, CEA, Universite Bordeaux 1, 33405 Talence (France); Habs, D.; Schramm, U.; Schreiber, J. [Ludwig-Maximilian Universitaet Muenchen, 85748 Garching (Germany); Karsch, S. [Max-Planck-Institut fuer Quantenoptik, 85748 Garching (Germany)] (and others)

    2005-05-15

    Collimated jets of beryllium, carbon, oxygen, fluorine, and palladium ions with >1 MeV/nucleon energies are observed from the rear surface of thin foils irradiated with laser intensities of up to 5x10{sup 19} W/cm{sup 2}. The normally dominant proton acceleration is suppressed when the target is subjected to Joule heating to remove hydrogen-bearing contaminant. This inhibits screening effects and permits effective energy transfer to and acceleration of heavier ion species. The influence of remnant protons on the spectral shape of the next highest charge-to-mass ratio species is shown. Particle-in-cell simulations confirming the experimental findings are presented.

  5. Tailoring the laser pulse shape to improve the quality of the self-injected electron beam in laser wakefield acceleration

    SciTech Connect (OSTI)

    Upadhyay, Ajay K.; Samant, Sushil A.; Krishnagopal, S.

    2013-01-15

    In laser wakefield acceleration, tailoring the shape of the laser pulse is one way of influencing the laser-plasma interaction and, therefore, of improving the quality of the self-injected electron beam in the bubble regime. Using three-dimensional particle-in-cell simulations, the evolution dynamics of the laser pulse and the quality of the self-injected beam, for a Gaussian pulse, a positive skew pulse (i.e., one with sharp rise and slow fall), and a negative skew pulse (i.e., one with a slow rise and sharp fall) are studied. It is observed that with a negative skew laser pulse there is a substantial improvement in the emittance (by around a factor of two), and a modest improvement in the energy-spread, compared to Gaussian as well as positive skew pulses. However, the injected charge is less in the negative skew pulse compared to the other two. It is also found that there is an optimal propagation distance that gives the best beam quality; beyond this distance, though the energy increases, the beam quality deteriorates, but this deterioration is least for the negative skew pulse. Thus, the negative skew pulse gives an improvement in terms of beam quality (emittance and energy spread) over what one can get with a Gaussian or positive skew pulse. In part, this is because of the lesser injected charge, and the strong suppression of continuous injection for the negative skew pulse.

  6. High-intensity laser-driven proton acceleration enhancement from hydrogen containing ultrathin targets

    SciTech Connect (OSTI)

    Dollar, F.; Reed, S. A.; Matsuoka, T.; Bulanov, S. S.; Chvykov, V.; Kalintchenko, G.; McGuffey, C.; Rousseau, P.; Thomas, A. G. R.; Willingale, L.; Yanovsky, V.; Krushelnick, K.; Maksimchuk, A.; Litzenberg, D. W.

    2013-09-30

    Laser driven proton acceleration experiments from micron and submicron thick targets using high intensity (2 × 10{sup 21} W/cm{sup 2}), high contrast (10{sup ?15}) laser pulses show an enhancement of maximum energy when hydrogen containing targets were used instead of non-hydrogen containing. In our experiments, using thin (<1?m) plastic foil targets resulted in maximum proton energies that were consistently 20%–100% higher than when equivalent thickness inorganic targets, including Si{sub 3}N{sub 4} and Al, were used. Proton energies up to 20 MeV were measured with a flux of 10{sup 7} protons/MeV/sr.

  7. Practical method and device for enhancing pulse contrast ratio for lasers and electron accelerators

    DOE Patents [OSTI]

    Zhang, Shukui; Wilson, Guy

    2014-09-23

    An apparatus and method for enhancing pulse contrast ratios for drive lasers and electron accelerators. The invention comprises a mechanical dual-shutter system wherein the shutters are placed sequentially in series in a laser beam path. Each shutter of the dual shutter system has an individually operated trigger for opening and closing the shutter. As the triggers are operated individually, the delay between opening and closing first shutter and opening and closing the second shutter is variable providing for variable differential time windows and enhancement of pulse contrast ratio.

  8. Tuning the electron energy by controlling the density perturbation position in laser plasma accelerators

    SciTech Connect (OSTI)

    Brijesh, P.; Thaury, C.; Phuoc, K. T.; Corde, S.; Lambert, G.; Malka, V. [Laboratoire d'Optique Appliquee, ENSTA ParisTech, CNRS UMR7639, Ecole Polytechnique, 91761 Palaiseau (France); Mangles, S. P. D.; Bloom, M.; Kneip, S. [Blackett Laboratory, Imperial College, London SW7 2AZ (United Kingdom)

    2012-06-15

    A density perturbation in an underdense plasma was used to improve the quality of electron bunches produced in the laser-plasma wakefield acceleration scheme. Quasi-monoenergetic electrons were generated by controlled injection in the longitudinal density gradients of the density perturbation. By tuning the position of the density perturbation along the laser propagation axis, a fine control of the electron energy from a mean value of 60 MeV to 120 MeV has been demonstrated with a relative energy-spread of 15 {+-} 3.6%, divergence of 4 {+-} 0.8 mrad, and charge of 6 {+-} 1.8 pC.

  9. Accelerating Into the Future: From 0 to GeV in a Few Centimeters (LBNL Summer Lecture Series)

    ScienceCinema (OSTI)

    Leemans, Wim [LOASIS Program, AFRD

    2009-09-01

    July 8, 2008 Berkeley Lab lecture: By exciting electric fields in plasma-based waveguides, lasers accelerate electrons in a fraction of the distance conventional accelerators require. The Accelerator and Fusion Research Division's LOASIS program, headed by Wim Leemans, has used 40-trillion-watt laser pulses to deliver billion-electron-volt (1 GeV) electron beams within centimeters. Leemans looks ahead to BELLA, 10-GeV accelerating modules that could power a future linear collider.

  10. Laser Triggered Injection of Electrons in a Laser Wakefield Accelerator with the Colliding Pulse

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    consider a CPI configuration in which the electron injection results from the beat wave generated, Berkeley, CA 94720 University of Tokyo, Japan University of Paris XI, Orsay, France § Department (colliding with the drive laser pulse, used to generate a plasma wake) is discussed. The threshold laser

  11. Effects of radiation reaction in relativistic laser acceleration

    SciTech Connect (OSTI)

    Hadad, Y.; Labun, L.; Rafelski, J.; Elkina, N.; Klier, C.; Ruhl, H. [Departments of Physics and Mathematics, University of Arizona, Tucson, Arizona, 85721 (United States); Department fuer Physik der Ludwig-Maximillians-Universitaet, Theresienstrasse 37A, 80333 Muenchen (Germany)

    2010-11-01

    The goal of this paper is twofold: to explore the response of classical charges to electromagnetic force at the level of unity in natural units and to establish a criterion that determines physical parameters for which the related radiation-reaction effects are detectable. In pursuit of this goal, the Landau-Lifshitz equation is solved analytically for an arbitrary (transverse) electromagnetic pulse. A comparative study of the radiation emission of an electron in a linearly polarized pulse for the Landau-Lifshitz equation and for the Lorentz force equation reveals the radiation-reaction-dominated regime, in which radiation-reaction effects overcome the influence of the external fields. The case of a relativistic electron that is slowed down by a counterpropagating electromagnetic wave is studied in detail. We further show that when the electron experiences acceleration of order unity, the dynamics of the Lorentz force equation, the Landau-Lifshitz equation and the Lorentz-Abraham-Dirac equation all result in different radiation emission that could be distinguished in experiment. Finally, our analytic and numerical results are compared with those appearing in the literature.

  12. Beamed neutron emission driven by laser accelerated light ions

    E-Print Network [OSTI]

    S. Kar; A. Green; H. Ahmed; A. Alejo; A. P. L. Robinson; M. Cerchez; R. Clarke; D. Doria; S. Dorkings; J. Fernandez; S. R. Mirfyazi; P. McKenna; K. Naughton; D. Neely; P. Norreys; C. Peth; H. Powell; J. A. Ruiz; J. Swain; O. Willi; M. Borghesi

    2015-07-16

    We report on the experimental observation of beam-like neutron emission with peak flux of the order of 10^9 n/sr, from light nuclei reactions in a pitcher-catcher scenario, by employing MeV ions driven by high power laser. The spatial profile of the neutron beam, fully captured for the first time by employing a CR39 nuclear track detector, shows a FWHM divergence angle of 70 degrees, with a peak flux nearly an order of magnitude higher than the isotropic component elsewhere. The observed beamed flux of neutrons is highly favourable for a wide range of applications, and indeed for further transport and moderation to thermal energies. A systematic study employing various combinations of pitcher-catcher materials indicates the dominant reactions being d(p, n+p)^1H and d(d,n)^3He. Albeit insufficient cross-section data are available for modelling, the observed anisotropy in the neutrons' spatial and spectral profiles are most likely related to the directionality and high energy of the projectile ions.

  13. Beamed neutron emission driven by laser accelerated light ions

    E-Print Network [OSTI]

    Kar, S; Ahmed, H; Alejo, A; Robinson, A P L; Cerchez, M; Clarke, R; Doria, D; Dorkings, S; Fernandez, J; Mirfyazi, S R; McKenna, P; Naughton, K; Neely, D; Norreys, P; Peth, C; Powell, H; Ruiz, J A; Swain, J; Willi, O; Borghesi, M

    2015-01-01

    We report on the experimental observation of beam-like neutron emission with peak flux of the order of 10^9 n/sr, from light nuclei reactions in a pitcher-catcher scenario, by employing MeV ions driven by high power laser. The spatial profile of the neutron beam, fully captured for the first time by employing a CR39 nuclear track detector, shows a FWHM divergence angle of 70 degrees, with a peak flux nearly an order of magnitude higher than the isotropic component elsewhere. The observed beamed flux of neutrons is highly favourable for a wide range of applications, and indeed for further transport and moderation to thermal energies. A systematic study employing various combinations of pitcher-catcher materials indicates the dominant reactions being d(p, n+p)^1H and d(d,n)^3He. Albeit insufficient cross-section data are available for modelling, the observed anisotropy in the neutrons' spatial and spectral profiles are most likely related to the directionality and high energy of the projectile ions.

  14. 1999 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to Lasers (William & Mary News) Tue, 07201999 - 12:00am Tunable Laser Reaches Record Power Level Sun, 07181999 - 12:00am Experts at Newport News Lab Develop Powerful New...

  15. 2004 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    July 2004 Sat, 07312004 - 12:00am Supported Free Electron Laser Most Powerful Tunable Laser in World (Office of Naval Research) Sat, 07312004 - 12:00am Jefferson Lab beats...

  16. Characterization of proton and heavier ion acceleration in ultrahigh-intensity laser interactions with heated target foils

    SciTech Connect (OSTI)

    McKenna, P.; Ledingham, K.W.D.; Yang, J.M.; Robson, L.; McCanny, T.; Shimizu, S.; Clarke, R.J.; Neely, D.; Norreys, P.A.; Spohr, K.; Chapman, R.; Singhal, R.P.; Krushelnick, K.; Wei, M.S.

    2004-09-01

    Proton and heavy ion acceleration in ultrahigh intensity ({approx}2x10{sup 20} W cm{sup -2}) laser plasma interactions has been investigated using the new petawatt arm of the VULCAN laser. Nuclear activation techniques have been applied to make the first spatially integrated measurements of both proton and heavy ion acceleration from the same laser shots with heated and unheated Fe foil targets. Fe ions with energies greater than 10 MeV per nucleon have been observed. Effects of target heating on the accelerated ion energy spectra and the laser-to-ion energy conversion efficiencies are discussed. The laser-driven production of the long-lived isotope {sup 57}Co (271 days) via a heavy ion induced reaction is demonstrated.

  17. Beam loading in a laser-plasma accelerator using a near-hollow plasma channel

    SciTech Connect (OSTI)

    Schroeder, C. B.; Benedetti, C.; Esarey, E.; Leemans, W. P.

    2013-12-15

    Beam loading in laser-plasma accelerators using a near-hollow plasma channel is examined in the linear wake regime. It is shown that, by properly shaping and phasing the witness particle beam, high-gradient acceleration can be achieved with high-efficiency, and without induced energy spread or emittance growth. Both electron and positron beams can be accelerated in this plasma channel geometry. Matched propagation of electron beams can be achieved by the focusing force provided by the channel density. For positron beams, matched propagation can be achieved in a hollow plasma channel with external focusing. The efficiency of energy transfer from the wake to a witness beam is calculated for single ultra-short bunches and bunch trains.

  18. Spontaneous emergence of non-planar electron orbits during direct laser acceleration by a linearly polarized laser pulse

    E-Print Network [OSTI]

    Arefiev, A V; Robinson, A P L; Shvets, G; Willingale, L

    2015-01-01

    An electron irradiated by a linearly polarized relativistic intensity laser pulse in a cylindrical plasma channel can gain significant energy from the pulse. The laser electric and magnetic fields drive electron oscillations in a plane making it natural to expect the electron trajectory to be flat. We show that strong modulations of the relativistic $\\gamma$-factor associated with the energy enhancement cause the free oscillations perpendicular to the plane of the driven motion to become unstable. As a consequence, out of plane displacements grow to become comparable to the amplitude of the driven oscillations and the electron trajectory becomes essentially three-dimensional, even if at an early stage of the acceleration it was flat. The development of the instability profoundly affects the x-ray emission, causing considerable divergence of the radiation perpendicular to the plane of the driven oscillations, while also reducing the overall emitted energy.

  19. Self-truncated ionization injection and consequent monoenergetic electron bunches in laser wakefield acceleration

    SciTech Connect (OSTI)

    Zeng, Ming; Zhang, Jie [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China)] [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Chen, Min, E-mail: minchen@sjtu.edu.cn [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China) [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Department of Mathematics, Institute of Natural Sciences, and MOE-LSC, Shanghai Jiao Tong University, Shanghai 20040 (China); Sheng, Zheng-Ming, E-mail: zmsheng@sjtu.edu.cn [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China) [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Mori, Warren B. [University of California, Los Angeles, California 90095 (United States)] [University of California, Los Angeles, California 90095 (United States)

    2014-03-15

    The ionization-induced injection in laser wakefield acceleration has been recently demonstrated to be a promising injection scheme. However, the energy spread controlling in this mechanism remains a challenge because continuous injection in a mixed gas target is usually inevitable. Here, we propose that by use of certain initially unmatched laser pulses, the electron injection can be constrained to the very front region of the mixed gas target, typically in a length of a few hundreds micrometers determined by the laser self-focusing and the wake deformation. As a result, the produced electron beam has narrow energy spread and meanwhile contains tens of pC in charge. Both multidimensional simulations and theoretical analysis illustrate the effectiveness of this scheme.

  20. Micro-sphere layered targets efficiency in laser driven proton acceleration

    SciTech Connect (OSTI)

    Floquet, V.; Martin, Ph.; Ceccotti, T. [CEA, IRAMIS, SPAM, F-91191 Gif-sur-Yvette (France)] [CEA, IRAMIS, SPAM, F-91191 Gif-sur-Yvette (France); Klimo, O.; Psikal, J.; Limpouch, J.; Proska, J.; Novotny, F.; Stolcova, L. [FNSPE, Czech Technical University in Prague, CR-11519 Prague (Czech Republic)] [FNSPE, Czech Technical University in Prague, CR-11519 Prague (Czech Republic); Velyhan, A. [Institute of Physics v.v.i. ASCR, Na Slovance 1999, Prague (Czech Republic)] [Institute of Physics v.v.i. ASCR, Na Slovance 1999, Prague (Czech Republic); Macchi, A. [Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, research unit “Adriano Gozzini,” Via G. Moruzzi 1, 56124 Pisa (Italy) [Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, research unit “Adriano Gozzini,” Via G. Moruzzi 1, 56124 Pisa (Italy); Dipartimento di Fisica “Enrico Fermi,” Università di Pisa, largo Bruno Pontecorvo 3, 56127 Pisa (Italy); Sgattoni, A. [Dipartimento di Energia, Politecnico di Milano, Milano (Italy) [Dipartimento di Energia, Politecnico di Milano, Milano (Italy); Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, research unit “Adriano Gozzini,” Via G. Moruzzi 1, 56124 Pisa (Italy); Vassura, L. [LULI, UMR7605, CNRS-CEA-Ecole Polytechnique-Paris 6, 91128 Palaiseau (France) [LULI, UMR7605, CNRS-CEA-Ecole Polytechnique-Paris 6, 91128 Palaiseau (France); Dipartimento SBAI, Università di Roma “La Sapienza,” Via A. Scarpa 14, 00161 Roma (Italy); Labate, L.; Baffigi, F.; Gizzi, L. A. [Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, research unit “Adriano Gozzini,” Via G. Moruzzi 1, 56124 Pisa (Italy)] [Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, research unit “Adriano Gozzini,” Via G. Moruzzi 1, 56124 Pisa (Italy)

    2013-08-28

    Proton acceleration from the interaction of high contrast, 25 fs laser pulses at >10{sup 19} W/cm{sup 2} intensity with plastic foils covered with a single layer of regularly packed micro-spheres has been investigated experimentally. The proton cut-off energy has been measured as a function of the micro-sphere size and laser incidence angle for different substrate thickness, and for both P and S polarization. The presence of micro-spheres with a size comparable to the laser wavelength allows to increase the proton cut-off energy for both polarizations at small angles of incidence (10?). For large angles of incidence, however, proton energy enhancement with respect to flat targets is absent. Analysis of electron trajectories in particle-in-cell simulations highlights the role of the surface geometry in the heating of electrons.

  1. #LabChat: Particle Accelerators, Lasers and Discovery Science, May 17 at

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3 Racetracks Y-12 Beta-3of thePolicies Act ofRenewable1pm EST

  2. Study of electron acceleration and x-ray radiation as a function of plasma density in capillary-guided laser wakefield accelerators

    SciTech Connect (OSTI)

    Ju, J.; Döpp, A.; Cros, B.; Svensson, K.; Genoud, G.; Wojda, F.; Burza, M.; Persson, A.; Lundh, O.; Wahlström, C.-G.; Ferrari, H.

    2013-08-15

    Laser wakefield electron acceleration in the blow-out regime and the associated betatron X-ray radiation were investigated experimentally as a function of the plasma density in a configuration where the laser is guided. Dielectric capillary tubes were employed to assist the laser keeping self-focused over a long distance by collecting the laser energy around its central focal spot. With a 40 fs, 16 TW pulsed laser, electron bunches with tens of pC charge were measured to be accelerated to an energy up to 300 MeV, accompanied by X-ray emission with a peak brightness of the order of 10{sup 21} ph/s/mm{sup 2}/mrad{sup 2}/0.1%BW. Electron trapping and acceleration were studied using the emitted X-ray beam distribution to map the acceleration process; the number of betatron oscillations performed by the electrons was inferred from the correlation between measured X-ray fluence and beam charge. A study of the stability of electron and X-ray generation suggests that the fluctuation of X-ray emission can be reduced by stabilizing the beam charge. The experimental results are in good agreement with 3D particle-in-cell (PIC) simulation.

  3. Effect of the laser spot shape on spatial distribution of the ion bunch accelerated in a superstrong field

    SciTech Connect (OSTI)

    Komarov, V M; Charukhchev, A V [Public Limited Company "Scientific research Institute for Optoelectronic Instrument Engineering", Leningrad region (Russian Federation); Andreev, A A; Platonov, K Yu [Federal State Unitary Enterprise All-Russian Scientific Center "S.I.Vavilov State Optical Institute" (FSUE GOI), St.Petersburg (Russian Federation)

    2014-12-31

    We have investigated the effect of the laser spot shape on the spatial distribution of accelerated ions on the front and back sides of a thin target irradiated by a picosecond laser pulse having the intensity of (3 – 4) × 10{sup 18} W cm{sup -2}. Experimental data are compared with numerical calculations. It is shown that the spatial structure of the ion bunch on the front side of the target resembles the laser spot structure rotated by 90°. (interaction of laser radiation with matter. laser plasma)

  4. Picosecond-petawatt laser-block ignition of avalanche boron fusion by ultrahigh acceleration and ultrahigh magnetic fields

    E-Print Network [OSTI]

    Hora, Heinrich

    2015-01-01

    In contrast to the thermal laser-plasma interaction for fusion by nanosecond pulses, picosecond pulses offer a fundamentally different non-thermal direct conversion of laser energy into ultrahigh acceleration of plasma blocks. This allows to ignite boron fusion which otherwise is most difficult. Trapping by kilotesla magnetic fields and avalanche ignition leads to environmentally clean and economic energy generation.

  5. Ion Acceleration from the Interaction of Ultra-Intense Lasers with Solid Foils

    SciTech Connect (OSTI)

    Allen, M

    2004-11-24

    The discovery that ultra-intense laser pulses (I > 10{sup 18} W/cm{sup 2}) can produce short pulse, high energy proton beams has renewed interest in the fundamental mechanisms that govern particle acceleration from laser-solid interactions. Experiments have shown that protons present as hydrocarbon contaminants on laser targets can be accelerated up to energies > 50 MeV. Different theoretical models that explain the observed results have been proposed. One model describes a front-surface acceleration mechanism based on the ponderomotive potential of the laser pulse. At high intensities (I > 10{sup 18} W/cm{sup 2}), the quiver energy of an electron oscillating in the electric field of the laser pulse exceeds the electron rest mass, requiring the consideration of relativistic effects. The relativistically correct ponderomotive potential is given by U{sub p} = ([1 + I{lambda}{sup 2}/1.3 x 10{sup 18}]{sup 1/2} - 1) m{sub o}c{sup 2}, where I{lambda}{sup 2} is the irradiance in W {micro}m{sup 2}/cm{sup 2} and m{sub o}c{sup 2} is the electron rest mass. At laser irradiance of I{lambda}{sup 2} {approx} 10{sup 20} W {micro}m{sup 2}/cm{sup 2}, the ponderomotive potential can be of order several MeV. A few recent experiments--discussed in Chapter 3 of this thesis--consider this ponderomotive potential sufficiently strong to accelerate protons from the front surface of the target to energies up to tens of MeV. Another model, known as Target Normal Sheath Acceleration (TNSA), describes the mechanism as an electrostatic sheath on the back surface of the laser target. According to the TNSA model, relativistic hot electrons created at the laser-solid interaction penetrate the foil where a few escape to infinity. The remaining hot electrons are retained by the target potential and establish an electrostatic sheath on the back surface of the target. In this thesis we present several experiments that study the accelerated ions by affecting the contamination layer from which they originate. Radiative heating was employed as a method of removing contamination from palladium targets doped with deuterium. We present evidence that ions heavier than protons can be accelerated if hydrogenous contaminants that cover the laser target can be removed. We show that deuterons can be accelerated from the deuterated-palladium target, which has been radiatively heated to remove contaminants. Impinging a deuteron beam onto a tritiated-titanium catcher could lead to the development of a table-top source of short-pulse, 14-MeV fusion neutrons. We also show that by using an argon-ion sputter gun, contaminants from one side of the laser target can be selectively removed without affecting the other side. We show that irradiating a thin metallic foil with an ultra-intense laser pulse produces a proton beam with a yield of 1.5-2.5 10{sup 11} and temperature, kT = 1.5 MeV with a maximum proton energy > 9 MeV. Removing contaminants from the front surface of the laser target with an argon-ion sputter gun, had no observable effect on the proton beam. However, removing contaminants from the back surface of the laser target reduced the proton beam by two orders of magnitude to, at most, a yield of {approx} 10{sup 9} and a maximum proton energy < 4 MeV. Based on these observations, we conclude that the majority (> 99%) of high energy protons (E > 5 MeV) from the interaction of an ultra-intense laser pulse with a thin foil originate on the back surface of the foil--as predicted by the TNSA model. Our experimental results are in agreement with PIC simulations showing back surface protons reach energies up to 13 MeV, while front surface protons reach a maximum energy of 4 MeV. Well diagnosed and controllable proton beams will have many applications: neutron radiography, material damage studies, production of medical isotopes, and as a high-resolution radiography tool for diagnosing opaque materials and plasmas. Well collimated and focusable ion beams may also prove beneficial for alternative inertial-fusion concepts such as proton fast ignition, a pote

  6. Lab announces Venture Acceleration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResource andfirstDevice UWRecord-SettingLabactive

  7. Quasimonoenergetic collimated electron beams from a laser wakefield acceleration in low density pure nitrogen

    SciTech Connect (OSTI)

    Tao, Mengze [Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Bejing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Hafz, Nasr A. M., E-mail: nasr@sjtu.edu.cn; Li, Song; Mirzaie, Mohammad; Elsied, Ahmed M. M.; Ge, Xulei; Liu, Feng; Sokollik, Thomas; Sheng, Zhengming; Zhang, Jie, E-mail: jzhang1@sjtu.edu.cn [Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Chen, Liming [Bejing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

    2014-07-15

    A laser wakefield acceleration (LWFA) experiment is performed using 30 TW, 30 fs, and 800?nm laser pulses, focused onto pure nitrogen plasma having relatively low densities in the range of 0.8×10{sup 18}?cm{sup ?3} to 2.7×10{sup 18}?cm{sup ?3}. Electron beams having a low divergence of ?3??mrad (full-width at half-maximum) and quasi-monoenergetic peak energies of ?105??MeV are achieved over 4-mm interaction length. The total electron beam charge reached to 2 nC, however, only 1%–2% of this (tens of pC) had energies >35?MeV. We tried different conditions to optimize the electron beam acceleration; our experiment verifies that lower nitrogen plasma densities are generating electron beams with high quality in terms of divergence, charge, pointing stability, and maximum energy. In addition, if LWFA is to be widely used as a basis for compact particle accelerators in the future, therefore, from the economic and safety points of view we propose the use of nitrogen gas rather than helium or hydrogen.

  8. Optical control of electron phase space in plasma accelerators with incoherently stacked laser pulses

    SciTech Connect (OSTI)

    Kalmykov, S. Y. Shadwick, B. A.; Davoine, X.; Lehe, R.; Lifschitz, A. F.

    2015-05-15

    It is demonstrated that synthesizing an ultrahigh-bandwidth, negatively chirped laser pulse by incoherently stacking pulses of different wavelengths makes it possible to optimize the process of electron self-injection in a dense, highly dispersive plasma (n{sub 0}?10{sup 19}?cm{sup ?3}). Avoiding transformation of the driving pulse into a relativistic optical shock maintains a quasi-monoenergetic electron spectrum through electron dephasing and boosts electron energy far beyond the limits suggested by existing scaling laws. In addition, evolution of the accelerating bucket in a plasma channel is shown to produce a background-free, tunable train of femtosecond-duration, 35–100?kA, time-synchronized quasi-monoenergetic electron bunches. The combination of the negative chirp and the channel permits acceleration of electrons beyond 1?GeV in a 3?mm plasma with 1.4?J of laser pulse energy, thus offering the opportunity of high-repetition-rate operation at manageable average laser power.

  9. Jefferson Lab awards upgrade contracts | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    an addition to Jeff Lab's massive Central Helium Liquefier building. From that building helium is pumped to keep the accelerator cool. Another 3.3 million went to a Japanese...

  10. The slingshot effect: A possible new laser-driven high energy acceleration mechanism for electrons

    SciTech Connect (OSTI)

    Fiore, Gaetano; Fedele, Renato; Angelis, Umberto de

    2014-11-15

    We show that under appropriate conditions the impact of a very short and intense laser pulse onto a plasma causes the expulsion of surface electrons with high energy in the direction opposite to the one of the propagations of the pulse. This is due to the combined effects of the ponderomotive force and the huge longitudinal field arising from charge separation (“slingshot effect”). The effect should also be present with other states of matter, provided the pulse is sufficiently intense to locally cause complete ionization. An experimental test seems to be feasible and, if confirmed, would provide a new extraction and acceleration mechanism for electrons, alternative to traditional radio-frequency-based or laser-wake-field ones.

  11. The slingshot effect: a possible new laser-driven high energy acceleration mechanism for electrons

    E-Print Network [OSTI]

    Gaetano Fiore; Renato Fedele; Umberto de Angelis

    2014-11-14

    We show that under appropriate conditions the impact of a very short and intense laser pulse onto a plasma causes the expulsion of surface electrons with high energy in the direction opposite to the one of propagation of the pulse. This is due to the combined effects of the ponderomotive force and the huge longitudinal field arising from charge separation ("slingshot effect"). The effect should also be present with other states of matter, provided the pulse is sufficiently intense to locally cause complete ionization. An experimental test seems to be feasible and, if confirmed, would provide a new extraction and acceleration mechanism for electrons, alternative to traditional radio-frequency-based or Laser-Wake-Field ones.

  12. An ultrashort pulse ultra-violet radiation undulator source driven by a laser plasma wakefield accelerator

    SciTech Connect (OSTI)

    Anania, M. P. [SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG (United Kingdom); INFN, Laboratori Nazionali di Frascati, I-00044 Frascati (Italy); Brunetti, E.; Wiggins, S. M.; Grant, D. W.; Welsh, G. H.; Issac, R. C.; Cipiccia, S.; Shanks, R. P.; Manahan, G. G.; Aniculaesei, C.; Jaroszynski, D. A., E-mail: d.a.jaroszynski@strath.ac.uk [SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Geer, S. B. van der; Loos, M. J. de [Pulsar Physics, Burghstraat 47, 5614 BC Eindhoven (Netherlands); Poole, M. W.; Shepherd, B. J. A.; Clarke, J. A. [ASTeC, STFC, Daresbury Laboratory, Warrington WA4 4AD (United Kingdom); Gillespie, W. A. [SUPA, School of Engineering, Physics and Mathematics, University of Dundee, Dundee DD1 4HN (United Kingdom); MacLeod, A. M. [School of Computing and Creative Technologies, University of Abertay Dundee, Dundee DD1 1HG (United Kingdom)

    2014-06-30

    Narrow band undulator radiation tuneable over the wavelength range of 150–260?nm has been produced by short electron bunches from a 2?mm long laser plasma wakefield accelerator based on a 20?TW femtosecond laser system. The number of photons measured is up to 9?×?10{sup 6} per shot for a 100 period undulator, with a mean peak brilliance of 1?×?10{sup 18} photons/s/mrad{sup 2}/mm{sup 2}/0.1% bandwidth. Simulations estimate that the driving electron bunch r.m.s. duration is as short as 3 fs when the electron beam has energy of 120–130?MeV with the radiation pulse duration in the range of 50–100 fs.

  13. Simulation of direct plasma injection for laser ion beam acceleration with a radio frequency quadrupole

    SciTech Connect (OSTI)

    Jin, Q. Y.; Li, Zh. M.; Liu, W.; Zhao, H. Y. Zhang, J. J.; Sha, Sh.; Zhang, Zh. L.; Zhang, X. Zh.; Sun, L. T.; Zhao, H. W.

    2014-07-15

    The direct plasma injection scheme (DPIS) has been being studied at Institute of Modern Physics since several years ago. A C{sup 6+} beam with peak current of 13 mA, energy of 593 keV/u has been successfully achieved after acceleration with DPIS method. To understand the process of DPIS, some simulations have been done as follows. First, with the total current intensity and the relative yields of different charge states for carbon ions measured at the different distance from the target, the absolute current intensities and time-dependences for different charge states are scaled to the exit of the laser ion source in the DPIS. Then with these derived values as the input parameters, the extraction of carbon beam from the laser ion source to the radio frequency quadrupole with DPIS is simulated, which is well agreed with the experiment results.

  14. Dependence of electron trapping on bubble geometry in laser-plasma wakefield acceleration

    SciTech Connect (OSTI)

    Li, X. F.; Yu, Q.; Huang, S.; Zhang, F.; Kong, Q., E-mail: qkong@fudan.edu.cn [Applied Ion Beam Physics Laboratory, Key Laboratory of the Ministry of Education, Institute of Modern Physics, Fudan University, Shanghai 200433 (China); Gu, Y. J. [Applied Ion Beam Physics Laboratory, Key Laboratory of the Ministry of Education, Institute of Modern Physics, Fudan University, Shanghai 200433 (China); Institute of Physics of the ASCR, ELI-Beamlines Project, Na Slovance 2, 18221 Prague (Czech Republic); Kawata, S. [Department of Advanced Interdisciplinary Sciences, Utsunomiya University, 7-1-2 Yohtoh, Utsunomiya 321-8585 (Japan)

    2014-07-15

    The effect of bubble shape in laser-plasma electron acceleration was investigated. We showed the general existence of an ellipsoid bubble. The electromagnetic field in this bubble and its dependence on bubble shape were determined through theory. The electron-trapping cross-section for different bubble aspect ratios was studied in detail. When the shape of the bubble was close to spherical, the trapping cross-section reached to the maximum. When the bubble deviated from a spherical shape, the cross-section decreased until electron injection no longer occurred. These results were confirmed by particle-in-cell simulation.

  15. Compact tunable Compton x-ray source from laser-plasma accelerator and plasma mirror

    SciTech Connect (OSTI)

    Tsai, Hai-En; Wang, Xiaoming; Shaw, Joseph M.; Li, Zhengyan; Zgadzaj, Rafal; Henderson, Watson; Downer, M. C.; Arefiev, Alexey V.; Zhang, Xi; Khudik, V.; Shvets, G.

    2015-02-15

    We present an in-depth experimental-computational study of the parameters necessary to optimize a tunable, quasi-monoenergetic, efficient, low-background Compton backscattering (CBS) x-ray source that is based on the self-aligned combination of a laser-plasma accelerator (LPA) and a plasma mirror (PM). The main findings are (1) an LPA driven in the blowout regime by 30 TW, 30?fs laser pulses produce not only a high-quality, tunable, quasi-monoenergetic electron beam, but also a high-quality, relativistically intense (a{sub 0} ? 1) spent drive pulse that remains stable in profile and intensity over the LPA tuning range. (2) A thin plastic film near the gas jet exit retro-reflects the spent drive pulse efficiently into oncoming electrons to produce CBS x-rays without detectable bremsstrahlung background. Meanwhile, anomalous far-field divergence of the retro-reflected light demonstrates relativistic “denting” of the PM. Exploiting these optimized LPA and PM conditions, we demonstrate quasi-monoenergetic (50% FWHM energy spread), tunable (75–200?KeV) CBS x-rays, characteristics previously achieved only on more powerful laser systems by CBS of a split-off, counter-propagating pulse. Moreover, laser-to-x-ray photon conversion efficiency (?6?×?10{sup ?12}) exceeds that of any previous LPA-based quasi-monoenergetic Compton source. Particle-in-cell simulations agree well with the measurements.

  16. Safety Comes First | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    at the Test Lab, the Free-Electron Laser and within the Facilities Management and Logistics group. The inspection identified four findings the lab needs to address and one...

  17. Resonantly excited betatron hard X-Rays from Ionization Injected Electron Beam in a Laser Plasma Accelerator

    E-Print Network [OSTI]

    Huang, K; Li, Y F; Li, D Z; Tao, M Z; Mirzaie, M; Ma, Y; Zhao, J R; Li, M H; Chen, M; Hafz, N; Sokollik, T; Sheng, Z M; Zhang, J

    2015-01-01

    A new scheme for bright hard x-ray emission from laser wakefield electron accelerator is reported, where pure nitrogen gas is adopted. Intense Betatron x-ray beams are generated from ionization injected K-shell electrons of nitrogen into the accelerating wave bucket. The x-ray radiation shows synchrotron-like spectrum with total photon yield 8$\\times$10$^8$/shot and $10^8$ over 110keV. In particular, the betatron hard x-ray photon yield is 10 times higher compared to the case of helium gas under the same laser parameters. Particle-in-cell simulation suggests that the enhancement of the x-ray yield results from ionization injection, which enables the electrons to be quickly accelerated to the driving laser region for subsequent betatron resonance. Employing the present scheme,the single stage nitrogen gas target could be used to generate stable high brightness betatron hard x-ray beams.

  18. Monoenergetic acceleration of a target foil by circularly polarized laser pulse in RPA regime without thermal heating

    SciTech Connect (OSTI)

    Khudik, V.; Yi, S. A.; Siemon, C.; Shvets, G. [Department of Physics and Institute for Fusion Studies, University of Texas at Austin, One University Station C1500, Austin, Texas 78712 (United States)

    2012-12-21

    A kinetic model of the monoenergetic acceleration of a target foil irradiated by the circularly polarized laser pulse is developed. The target moves without thermal heating with constant acceleration which is provided by chirping the frequency of the laser pulse and correspondingly increasing its intensity. In the accelerated reference frame, bulk plasma in the target is neutral and its parameters are stationary: cold ions are immobile while nonrelativistic electrons bounce back and forth inside the potential well formed by ponderomotive and electrostatic potentials. It is shown that a positive charge left behind of the moving target in the ion tail and a negative charge in front of the target in the electron sheath form a capacitor whose constant electric field accelerates the ions of the target. The charge separation is maintained by the radiation pressure pushing electrons forward. The scalings of the target thickness and electromagnetic radiation with the electron temperature are found.

  19. Single-Shot Femtosecond Electron Diffraction with Laser-Accelerated Electrons: Experimental Demonstration of Electron Pulse Compression

    SciTech Connect (OSTI)

    Tokita, Shigeki; Hashida, Masaki; Inoue, Shunsuke; Nishoji, Toshihiko; Otani, Kazuto; Sakabe, Shuji [Advanced Research Center for Beam Science, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan and Department of Physics, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo, Kyoto 606-7501 (Japan)

    2010-11-19

    We report the first experimental demonstration of longitudinal compression of laser-accelerated electron pulses. Accelerated by a femtosecond laser pulse with an intensity of 10{sup 18} W/cm{sup 2}, an electron pulse with an energy of around 350 keV and a relative momentum spread of about 10{sup -2} was compressed to a 500-fs pulse at a distance of about 50 cm from the electron source by using a magnetic pulse compressor. This pulse was used to generate a clear diffraction pattern of a gold crystal in a single shot. This method solves the space-charge problem in ultrafast electron diffraction.

  20. 2010 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - 12:00am May 3 Abstract for ColloquiumPublic Lecture on May 11 at Jefferson Lab titled: Accelerator Driven System (ADS) in Support of Sustainable Nuclear Power Program in India....

  1. 2010 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    - 12:00am May 3 Abstract for ColloquiumPublic Lecture on May 11 at Jefferson Lab titled: Accelerator Driven System (ADS) in Support of Sustainable Nuclear Power Program in India....

  2. 2001 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2001 Sun, 04222001 - 12:00am Doors to Discovery (Daily Press) Thu, 04192001 - 12:00am Peek in Jefferson Lab (Daily Press) Tue, 04172001 - 12:00am Electron Accelerator...

  3. Nano-scale electron bunching in laser-triggered ionization injection in plasma accelerators

    E-Print Network [OSTI]

    Xu, X L; Li, F; Wan, Y; Wu, Y P; Hua, J F; Pai, C -H; Lu, W; An, W; Yu, P; Mori, W B; Joshi, C

    2015-01-01

    Ionization injection is attractive as a controllable injection scheme for generating high quality electron beams using plasma-based wakefield acceleration. Due to the phase dependent tunneling ionization rate and the trapping dynamics within a nonlinear wake, the discrete injection of electrons within the wake is nonlinearly mapped to discrete final phase space structure of the beam at the location where the electrons are trapped. This phenomenon is theoretically analyzed and examined by three-dimensional particle-in-cell simulations which show that three dimensional effects limit the wave number of the modulation to between $> 2k_0$ and about $5k_0$, where $k_0$ is the wavenumber of the injection laser. Such a nano-scale bunched beam can be diagnosed through coherent transition radiation upon its exit from the plasma and may find use in generating high-power ultraviolet radiation upon passage through a resonant undulator.

  4. From laser particle acceleration to the synthesis of extremely neutron rich isotopes via the novel fission-fusion mechanism

    SciTech Connect (OSTI)

    Thirolf, P. G.

    2015-02-24

    High-power, short pulse lasers have emerged in the last decade as attractive tools for accelerating charged particles (electrons, ions) to high energies over mm-scale acceleration lengths, thus promising to rival conventional acceleration techniques in the years ahead. In the first part of the article, the principles of laser-plasma interaction as well as the techniques and the current status of the acceleration of electron and ion beams will be briefly introduced. In particular with the upcoming next generation of multi-PW class laser systems, such as the one under construction for the ELI-Nuclear Physics project in Bucharest (ELI-NP), very efficient acceleration mechanisms for brilliant ion beams like radiation pressure acceleration (RPA) come into reach. Here, ultra-dense ion beams reaching solid-state density can be accelerated from thin target foils, exceeding the density of conventionally accelerated ion beams by about 14 orders of magnitude. This unique property of laser-accelerated ion beams can be exploited to explore the scenario of a new reaction mechanism called ‘fission-fusion’, which will be introduced in the second part of the article. Accelerating fissile species (e.g. {sup 232}Th) towards a second layer of the same material will lead to fission both of the beam-like and target-like particles. Due to the close to solid-state density of the accelerated ion bunches, fusion may occur between neutron-rich (light) fission products. This may open an access path towards extremely neutron-rich nuclides in the vicinity of the N=126 waiting point of the astrophysical r process. ‘Waiting points’ at closed nucleon shells play a crucial role in controlling the reaction rates. However, since most of the pathway of heavy-element formation via the rapid-neutron capture process (r-process) runs in ‘terra incognita’ of the nuclear landscape, in particular the waiting point at N=126 is yet unexplored and will remain largely inaccessible to conventional nuclear reaction schemes even at next-generation radioactive beam facilities, underlining the attractive perspectives offered, e.g., by ELI-NP.

  5. Laser wakefield acceleration of electrons with ionization injection in a pure N{sup 5+} plasma waveguide

    SciTech Connect (OSTI)

    Goers, A. J.; Yoon, S. J.; Elle, J. A.; Hine, G. A.; Milchberg, H. M.

    2014-05-26

    Ionization injection-assisted laser wakefield acceleration of electrons up to 120?MeV is demonstrated in a 1.5?mm long pure helium-like nitrogen plasma waveguide. The guiding structure stabilizes the high energy electron beam pointing and reduces the beam divergence. Our results are confirmed by 3D particle-in-cell simulations.

  6. Laser Wakefield Accelerator Experiments W.P. Leemans, D. Rodgers, RE. Catravas, G. Fubiani, C.G.R.

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    and various laser beam, plasma and electron beam diagnostics; and (ii) the production of relativistic electron driven production of relativistic electron beams from plasmas using a high repetition rate (10 Hz), high-compact accelerators capable of producing high quality relativistic electron beams. Accelerationof electrons

  7. Target normal sheath acceleration of foil ions by laser-trapped hot electrons from a long subcritical-density preplasma

    SciTech Connect (OSTI)

    Luan, S. X.; Yu, Wei; Shen, B. F.; Xu, Z. Z.; Yu, M. Y.; Zhuo, H. B.; Xu, Han; Wong, A. Y.; Wang, J. W.

    2014-12-15

    In a long subcritical density plasma, an ultrashort ultraintense laser pulse can self-organize into a fast but sub-relativistic propagating structure consisting of the modulated laser light and a large number of trapped electrons from the plasma. Upon impact of the structure with a solid foil target placed in the latter, the remaining laser light is reflected, but the dense and hot trapped electrons pass through the foil, together with the impact-generated target-frontsurface electrons to form a dense hot electron cloud at the back of the target suitable for enhancing target normal sheath acceleration of the target-backsurface ions. The accelerated ions are well collimated and of high charge and energy densities, with peak energies a full order of magnitude higher than that from target normal sheath acceleration without the subcritical density plasma. In the latter case, the space-charge field accelerating the ions is limited since they are formed only by the target-frontsurface electrons during the very short instant of laser reflection.

  8. 2001 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Host Teachers' Course (Daily Press) Thu, 03152001 - 12:00am State Should Invest More in High-Tech Economy (Daily Press) Mon, 03122001 - 12:00am Lab's Laser Key to Strong...

  9. News Links | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Energy (March 16, 2011, A Message from Dr. Timothy Hallman, DOE) Jefferson Lab: Laser gun to eventually shoot down missiles (February 21, 2011, Daily Press) Navy Breaks World...

  10. 2011 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Dr. Timothy Hallman, DOE) February 2011 Mon, 02212011 - 12:00am Jefferson Lab: Laser gun to eventually shoot down missiles (Daily Press) Sun, 02202011 - 12:00am Navy Breaks...

  11. 2011 - 02 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    February 2011 Mon, 02212011 - 12:00am Jefferson Lab: Laser gun to eventually shoot down missiles (Daily Press) Sun, 02202011 - 12:00am Navy Breaks World Record With Futuristic...

  12. 2001 - 08 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    August 2001 Wed, 08292001 - 11:00pm Learning to Teach Physics (Daily Press) Sun, 08192001 - 11:00pm Navy-Funded Lab Develops Powerful Laser for Missile Defense (Navy News) Sun,...

  13. 2006 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2006 Sun, 04232006 - 1:00pm Jefferson Lab News - HAPPEx II reveals proton isn't very strange Mon, 04102006 - 1:00pm Free-Electron Laser Targets Fat Wed, 04052006 -...

  14. 1999 - 09 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Museum (Daily Press) Thu, 09091999 - 12:00am Success at Jefferson Lab Spurs Need for More Space (Burrelle's) Wed, 09011999 - 12:00am BIG FEL Grows in Power (Laser Focus World...

  15. Ultraviolet | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    States. For some years, the Jefferson Lab FEL has been a world leader in free-electron laser power. Strongly supported by funding from the Office of Naval Research, it achieved...

  16. Livermore Lab's giant laser system will bring star power to Earth

    SciTech Connect (OSTI)

    Moses, E

    2010-04-08

    In the 50 years since the laser was first demonstrated in Malibu, California, on May 16, 1960, Lawrence Livermore National Laboratory (LLNL) has been a world leader in laser technology and the home for many of the world's most advanced laser systems. That tradition continues today at LLNL's National Ignition Facility (NIF), the world's most energetic laser system. NIF's completion in March 2009 not only marked the dawn of a new era of scientific research - it could also prove to be the next big step in the quest for a sustainable, carbon-free energy source for the world. NIF consists of 192 laser beams that will focus up to 1.8 million joules of energy on a bb-sized target filled with isotopes of hydrogen - forcing the hydrogen nuclei to collide and fuse in a controlled thermonuclear reaction similar to what happens in the sun and the stars. More energy will be produced by this 'ignition' reaction than the amount of laser energy required to start it. This is the long-sought goal of 'energy gain' that has eluded fusion researchers for more than half a century. Success will be a scientific breakthrough - the first demonstration of fusion ignition in a laboratory setting, duplicating on Earth the processes that power the stars. This impending success could not be achieved without the valuable partnerships forged with other national and international laboratories, private industry and universities. One of the most crucial has been between LLNL and the community in which it resides. Over 155 businesses in the local Tri-Valley area have contributed to the NIF, from industrial technology and engineering firms to tool manufacturing, electrical, storage and supply companies. More than $2.3B has been spent locally between contracts with nearby merchants and employee salaries. The Tri-Valley community has enabled the Laboratory to complete a complex and far-reaching project that will have national and global impact in the future. The first experiments were conducted on NIF last summer and fall, successfully delivering a world-record level of ultraviolet laser energy - more than 1.2 million joules - to a target. The experiments also demonstrated the target drive and target capsule conditions required to achieve fusion ignition. When ignition experiments begin later this year, NIF's lasers will create temperatures and pressures in the hydrogen target that exist only in the cores of stars and giant planets and inside thermonuclear weapons. As a key component of the National Nuclear Security Administration's Stockpile Stewardship Program, NIF will offer the means for sustaining a safe, secure and reliable U.S. nuclear deterrent without nuclear testing. NIF is uniquely capable of providing the experimental data needed to develop and validate computer models that will enable scientists to assess the continuing viability of the nation's nuclear stockpile. Along with this vital national security mission, success at NIF also offers the possibility of groundbreaking scientific discoveries in a wide variety of disciplines ranging from hydrodynamics to astrophysics. As a unique facility in the world that can create the conditions that exist in supernovas and in the cores of giant planets, NIF will help unlock the secrets of the cosmos and inspire the next generation of scientists. It is NIF's third mission, energy security that has been generating the most excitement in the news media and the international scientific community. The reasons are obvious: global energy demand, driven by population growth and the aspirations of the developing world, already is straining the planet's existing energy resources. Global need for electricity is expected to double from its current level of about two trillion watts (TW) to four TW by 2030 and could reach eight to ten TW by the end of the century. As many as 10,000 new billion-watt power plants will have to be built to keep up with this demand. Meeting this pressing need will require a sustainable carbon-free energy technology that can supply base load electricity to the world. Successful ignition experim

  17. Generation of high-energy electron-positron beams in the collision of a laser-accelerated electron beam and a multi-petawatt laser

    E-Print Network [OSTI]

    Lobet, Mathieu; d'Humières, Emmanuel; Gremillet, Laurent

    2015-01-01

    Generation of antimatter via the multiphoton Breit-Wheeler process in an all-optical scheme will be made possible on forthcoming high-power laser facilities through the collision of wakefield-accelerated GeV electrons with a counter-propagating laser pulse with $10^{22}$-$10^{23}$ $\\mathrm{Wcm}^{-2}$ peak intensity. By means of integrated 3D particle-in-cell simulations, we show that the production of positron beams with 0.1-1 nC total charge, 100-400 MeV mean energy and 0.01-0.1 rad divergence is within the reach of soon-to-be-available laser systems. The variations of the positron beam's properties with respect to the laser parameters are also examined.

  18. Motion of the plasma critical layer during relativistic-electron laser interaction with immobile and comoving ion plasma for ion acceleration

    SciTech Connect (OSTI)

    Sahai, Aakash A., E-mail: aakash.sahai@gmail.com [Department of Electrical Engineering, Duke University, Durham, North Carolina 27708 (United States)

    2014-05-15

    We analyze the motion of the plasma critical layer by two different processes in the relativistic-electron laser-plasma interaction regime (a{sub 0}>1). The differences are highlighted when the critical layer ions are stationary in contrast to when they move with it. Controlling the speed of the plasma critical layer in this regime is essential for creating low-? traveling acceleration structures of sufficient laser-excited potential for laser ion accelerators. In Relativistically Induced Transparency Acceleration (RITA) scheme, the heavy plasma-ions are fixed and only trace-density light-ions are accelerated. The relativistic critical layer and the acceleration structure move longitudinally forward by laser inducing transparency through apparent relativistic increase in electron mass. In the Radiation Pressure Acceleration (RPA) scheme, the whole plasma is longitudinally pushed forward under the action of the laser radiation pressure, possible only when plasma ions co-propagate with the laser front. In RPA, the acceleration structure velocity critically depends upon plasma-ion mass in addition to the laser intensity and plasma density. In RITA, mass of the heavy immobile plasma-ions does not affect the speed of the critical layer. Inertia of the bared immobile ions in RITA excites the charge separation potential, whereas RPA is not possible when ions are stationary.

  19. A Wire Position Monitor System for the 1.3 FHZ Tesla-Style Cryomodule at the Fermilab New-Muon-Lab Accelerator

    SciTech Connect (OSTI)

    Eddy, N.; Fellenz, B.; Prieto, P.; Semenov, A.; Voy, D.C.; Wendt, M.; /Fermilab

    2011-08-17

    The first cryomodule for the beam test facility at the Fermilab New-Muon-Lab building is currently under RF commissioning. Among other diagnostics systems, the transverse position of the helium gas return pipe with the connected 1.3 GHz SRF accelerating cavities is measured along the {approx}15 m long module using a stretched-wire position monitoring system. An overview of the wire position monitor system technology is given, along with preliminary results taken at the initial module cooldown, and during further testing. As the measurement system offers a high resolution, we also discuss options for use as a vibration detector. An electron beam test facility, based on superconducting RF (SRF) TESLA-style cryomodules is currently under construction at the Fermilab New-Muon-Lab (NML) building. The first, so-called type III+, cryomodule (CM-1), equipped with eight 1.3 GHz nine-cell accelerating cavities was recently cooled down to 2 K, and is currently under RF conditioning. The transverse alignment of the cavity string within the cryomodule is crucial for minimizing transverse kick and beam break-up effects, generated by the high-order dipole modes of misaligned accelerating structures. An optimum alignment can only be guaranteed during the assembly of the cavity string, i.e. at room temperatures. The final position of the cavities after cooldown is uncontrollable, and therefore unknown. A wire position monitoring system (WPM) can help to understand the transverse motion of the cavities during cooldown, their final location and the long term position stability after cryo-temperatures are settled, as well as the position reproducibility for several cold-warm cycles. It also may serve as vibration sensor, as the wire acts as a high-Q resonant detector for mechanical vibrations in the low-audio frequency range. The WPM system consists out of a stretched-wire position detection system, provided with help of INFN-Milano and DESY Hamburg, and RF generation and read-out electronics, developed at Fermilab.

  20. Characterization and Application of Hard X-Ray Betatron Radiation Generated by Relativistic Electrons from a Laser-Wakefield Accelerator

    E-Print Network [OSTI]

    Schnell, Michael; Uschmann, Ingo; Jansen, Oliver; Kaluza, Malte Christoph; Spielmann, Christian

    2015-01-01

    The necessity for compact table-top x-ray sources with higher brightness, shorter wavelength and shorter pulse duration has led to the development of complementary sources based on laser-plasma accelerators, in contrast to conventional accelerators. Relativistic interaction of short-pulse lasers with underdense plasmas results in acceleration of electrons and in consequence in the emission of spatially coherent radiation, which is known in the literature as betatron radiation. In this article we report on our recent results in the rapidly developing field of secondary x-ray radiation generated by high-energy electron pulses. The betatron radiation is characterized with a novel setup allowing to measure the energy, the spatial energy distribution in the far-field of the beam and the source size in a single laser shot. Furthermore, the polarization state is measured for each laser shot. In this way the emitted betatron x-rays can be used as a non-invasive diagnostic tool to retrieve very subtle information of t...

  1. Modeling of 10 GeV-1 TeV laser-plasma accelerators using Lorentz booster simulations

    SciTech Connect (OSTI)

    Vay, J.-L.; Geddes, C.G.R.; Esarey, E.; Esarey, E.; Leemans, W.P.; Cormier-Michel, E.; Grote, D.P.

    2011-12-01

    Modeling of laser-plasma wakefield accelerators in an optimal frame of reference [J.-L. Vay, Phys. Rev. Lett. 98 130405 (2007)] allows direct and e#14;fficient full-scale modeling of deeply depleted and beam loaded laser-plasma stages of 10 GeV-1 TeV (parameters not computationally accessible otherwise). This verifies the scaling of plasma accelerators to very high energies and accurately models the laser evolution and the accelerated electron beam transverse dynamics and energy spread. Over 4, 5 and 6 orders of magnitude speedup is achieved for the modeling of 10 GeV, 100 GeV and 1 TeV class stages, respectively. Agreement at the percentage level is demonstrated between simulations using different frames of reference for a 0.1 GeV class stage. Obtaining these speedups and levels of accuracy was permitted by solutions for handling data input (in particular particle and laser beams injection) and output in a relativistically boosted frame of reference, as well as mitigation of a high-frequency instability that otherwise limits effectiveness.

  2. Macroparticle Theory of a Standing Wave Free-Electron Laser Two-Beam Accelerator

    E-Print Network [OSTI]

    Takayama, K.

    2008-01-01

    Macroparticle Theory of a Standing Wave Free-Electron LaserMacroparticle Theory of a Standing Wave Free-Electron LaserMacroparticle Theory of a Standing Wave Free-Electron Laser

  3. Transport and Non-Invasive Position Detection of Electron Beams from Laser-Plasma Accelerators

    E-Print Network [OSTI]

    Osterhoff, Jens

    2012-01-01

    Position Detection of Electron Beams from Laser-Plasmadiscussed. Keywords: Electron-beam transport, laser-plasmaand stability of produced electron beams has been steadily

  4. Plasma wakefields driven by an incoherent combination of laser pulses: A path towards high-average power laser-plasma accelerators

    SciTech Connect (OSTI)

    Benedetti, C.; Schroeder, C. B.; Esarey, E.; Leemans, W. P.

    2014-05-15

    The wakefield generated in a plasma by incoherently combining a large number of low energy laser pulses (i.e., without constraining the pulse phases) is studied analytically and by means of fully self-consistent particle-in-cell simulations. The structure of the wakefield has been characterized and its amplitude compared with the amplitude of the wake generated by a single (coherent) laser pulse. We show that, in spite of the incoherent nature of the wakefield within the volume occupied by the laser pulses, behind this region, the structure of the wakefield can be regular with an amplitude comparable or equal to that obtained from a single pulse with the same energy. Wake generation requires that the incoherent structures in the laser energy density produced by the combined pulses exist on a time scale short compared to the plasma period. Incoherent combination of multiple laser pulses may enable a technologically simpler path to high-repetition rate, high-average power laser-plasma accelerators, and associated applications.

  5. Plasma wakefields driven by an incoherent combination of laser pulses: a path towards high-average power laser-plasma accelerators

    SciTech Connect (OSTI)

    Benedetti, C.; Schroeder, C.B.; Esarey, E.; Leemans, W.P.

    2014-05-01

    he wakefield generated in a plasma by incoherently combining a large number of low energy laser pulses (i.e.,without constraining the pulse phases) is studied analytically and by means of fully-self-consistent particle-in-cell simulations. The structure of the wakefield has been characterized and its amplitude compared with the amplitude of the wake generated by a single (coherent) laser pulse. We show that, in spite of the incoherent nature of the wakefield within the volume occupied by the laser pulses, behind this region the structure of the wakefield can be regular with an amplitude comparable or equal to that obtained from a single pulse with the same energy. Wake generation requires that the incoherent structure in the laser energy density produced by the combined pulses exists on a time scale short compared to the plasma period. Incoherent combination of multiple laser pulses may enable a technologically simpler path to high-repetition rate, high-average power laser-plasma accelerators and associated applications.

  6. Efficient proton acceleration and focusing by an ultraintense laser interacting with a parabolic double concave target with an extended rear

    SciTech Connect (OSTI)

    Bake, Muhammad Ali; Xie, Bai-Song; Aimidula, Aimierding [Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China)] [Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China); Wang, Hong-Yu [Department of Physics, Anshan Normal University, Anshan 114005 (China) [Department of Physics, Anshan Normal University, Anshan 114005 (China); Shanghai Bright-Tech Information Technology Co. Ltd., Shanghai 200136 (China)

    2013-07-15

    A new scheme for acceleration and focusing of protons via an improved parabolic double concave target irradiated by an ultraintense laser pulse is proposed. When an intense laser pulse illuminates a concave target, the hot electrons are concentrated on the focal region of the rear cavity and they form a strong space-charge-separation field, which accelerates the protons. For a simple concave target, the proton energy spectrum becomes very broad outside the rear cavity because of transverse divergence of the electromagnetic fields. However, particle-in-cell simulations show that, when the concave target has an extended rear, the hot electrons along the wall surface induce a transverse focusing sheath field, resulting in a clear enhancement of proton focusing, which makes the lower proton energy spread, while, leads to a little reduction of the proton bunch peak energy.

  7. A high-finesse Fabry-Perot cavity with a frequency-doubled green laser for precision Compton polarimetry at Jefferson Lab

    E-Print Network [OSTI]

    Rakhman, A; Nanda, S; Benmokhtar, F; Camsonne, A; Cates, G D; Dalton, M M; Franklin, G B; Friend, M; Michaels, R W; Nelyubin, V; Parno, D S; Paschke, K D; Quinn, B P; Souder, P A; Tobias, W A

    2016-01-01

    A high-finesse Fabry-Perot cavity with a frequency-doubled continuous wave green laser (532~nm) has been built and installed in Hall A of Jefferson Lab for high precision Compton polarimetry. The infrared (1064~nm) beam from a ytterbium-doped fiber amplifier seeded by a Nd:YAG nonplanar ring oscillator laser is frequency doubled in a single-pass periodically poled MgO:LiNbO$_{3}$ crystal. The maximum achieved green power at 5 W IR pump power is 1.74 W with a total conversion efficiency of 34.8\\%. The green beam is injected into the optical resonant cavity and enhanced up to 3.7~kW with a corresponding enhancement of 3800. The polarization transfer function has been measured in order to determine the intra-cavity circular laser polarization within a measurement uncertainty of 0.7\\%. The PREx experiment at Jefferson Lab used this system for the first time and achieved 1.0\\% precision in polarization measurements of an electron beam with energy and current of 1.0~GeV and 50~$\\mu$A.

  8. A high-finesse Fabry-Perot cavity with a frequency-doubled green laser for precision Compton polarimetry at Jefferson Lab

    E-Print Network [OSTI]

    A. Rakhman; M. Hafez; S. Nanda; F. Benmokhtar; A. Camsonne; G. D. Cates; M. M. Dalton; G. B. Franklin; M. Friend; R. W. Michaels; V. Nelyubin; D. S. Parno; K. D. Paschke; B. P. Quinn; P. A. Souder; W. A. Tobias

    2016-01-03

    A high-finesse Fabry-Perot cavity with a frequency-doubled continuous wave green laser (532~nm) has been built and installed in Hall A of Jefferson Lab for high precision Compton polarimetry. The infrared (1064~nm) beam from a ytterbium-doped fiber amplifier seeded by a Nd:YAG nonplanar ring oscillator laser is frequency doubled in a single-pass periodically poled MgO:LiNbO$_{3}$ crystal. The maximum achieved green power at 5 W IR pump power is 1.74 W with a total conversion efficiency of 34.8\\%. The green beam is injected into the optical resonant cavity and enhanced up to 3.7~kW with a corresponding enhancement of 3800. The polarization transfer function has been measured in order to determine the intra-cavity circular laser polarization within a measurement uncertainty of 0.7\\%. The PREx experiment at Jefferson Lab used this system for the first time and achieved 1.0\\% precision in polarization measurements of an electron beam with energy and current of 1.0~GeV and 50~$\\mu$A.

  9. The Radiation Reaction Effect on Electrons at Super-High Laser Intensities with Application to Ion Acceleration

    SciTech Connect (OSTI)

    Naumova, N. M.; Sokolov, I. V.; Tikhonchuk, V. T.; Schlegel, T.; Nees, J. A.; Yanovsky, V. P.; Labaune, C.; Mourou, G. A.

    2009-07-25

    At super-high laser intensities the radiation back reaction on electrons becomes so significant that its influence on laser-plasma interaction cannot be neglected while simulating these processes with particle-in-cell (PIC) codes. We discuss a way of taking the radiation effect on electrons into account and extracting spatial and frequency distributions of the generated high-frequency radiation. We also examine ponderomotive acceleration of ions in the double layer created by strong laser pulses and we compare an analytical description with PIC simulations as well. We discuss: (1) non-stationary features found in simulations, (2) electron cooling effect due to radiation losses, and (3) the limits of the analytical model.

  10. Jefferson Lab Tech Associate Invents Lockout Device for Equipment...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1990s and building Jefferson Lab's Continuous Electron Beam Accelerator was in high gear. The Accelerator Division was busy installing some 30 vacuum ion pumps in the tunnel....

  11. Standing-Wave Free-Electron Laser Two-Beam Accelerator

    E-Print Network [OSTI]

    Sessler, Andrew M.

    2008-01-01

    in Physics Research A Standing-Wave Free-Electron Laser Two-AC03-76SF00098 LBL-30418 Standing-Wave Free-Electron LaserNo. W-740S-ENG-48. Standing-wave free-electron laser two-

  12. Generation of Low Absolute Energy Spread Electron Beams in Laser Wakefield Acceleration Using Tightly Focused Laser through Near-Ionization-Threshold Injection

    E-Print Network [OSTI]

    Li, F; Wan, Y; Wu, Y P; Hua, J F; Pai, C H; Lu, W; Mori, W B; Joshi, C

    2015-01-01

    An enhanced ionization injection scheme using a tightly focused laser pulse with intensity near the ionization potential to trigger the injection process in a mismatched pre-plasma channel has been proposed and examined via multi-dimensional particle-in-cell simulations. The core idea of the proposed scheme is to lower the energy spread of trapped beams by shortening the injection distance. We have established theory to precisely predict the injection distance, as well as the ionization degree of injection atoms/ions, electron yield and ionized charge. We have found relation between injection distance and laser and plasma parameters, giving a strategy to control injection distance hence optimizing beam's energy spread. In the presented simulation example, we have investigated the whole injection and acceleration in detail and found some unique features of the injection scheme, like multi-bunch injection, unique longitudinal phase-space distribution, etc. Ultimate electron beam has a relative energy spread (rm...

  13. Jefferson Lab Weekly Briefs July 29, 2015 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Weekly Briefs July 29, 2015 12 GeV Upgrade The last civil construction task for the 12 GeV CEBAF Upgrade, accelerator tunnel air conditioning, is scheduled to be...

  14. Ultra-high-contrast laser acceleration of relativistic electrons in solid targets

    E-Print Network [OSTI]

    Higginson, Drew Pitney

    2013-01-01

    8.3 Accelerated Electron2.4 Electron TransportSimulations of LPI-measured Electron Distributions 8.5

  15. Microbunching Instability Effect Studies and Laser Heater Optimization for the SPARX FEL Accelerator

    E-Print Network [OSTI]

    Vaccarezza, C.

    2010-01-01

    OPTIMIZATION FOR THE SPARX FEL ACCELERATOR * C. Vaccarezza,and possibly enhance the FEL performance. delivered to theinstability effect for the SPARX FEL. Table 1: Electron beam

  16. Diagnosis of bubble evolution in laser-wakefield acceleration via angular distributions of betatron x-rays

    SciTech Connect (OSTI)

    Ma, Y.; Chen, L. M., E-mail: lmchen@iphy.ac.cn; Huang, K.; Yan, W. C. [Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100080 (China); Hafz, N. A. M.; Zhang, J. [Key Laboratory for Laser Plasmas and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Li, D. Z. [Institute of High Energy Physics, CAS, Beijing 100049 (China); Dunn, J. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Sheng, Z. M. [Key Laboratory for Laser Plasmas and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Department of Physics, Scottish Universities Physics Alliance, University of Strathclyde, Glasgow G4 0NG (United Kingdom)

    2014-10-20

    We present an indirect method to diagnose the electron beam behaviors and bubble dynamic evolution in a laser-wakefield accelerator. Four kinds of typical bubble dynamic evolution and, hence, electron beam behaviors observed in Particle-In-Cell simulations are identified correspondingly by simultaneous measurement of distinct angular distributions of the betatron radiation and electron beam energy spectra in experiment. The reconstruction of the bubble evolution may shed light on finding an effective way to better generate high-quality electron beams and enhanced betatron X-rays.

  17. Energy spread reduction of electron beams produced via laser wakefield acceleration

    E-Print Network [OSTI]

    Pollock, Bradley Bolt

    2012-01-01

    the resulting electron beams. Each diagnostic that was useddiagnostic suite which was developed to characterize the laser, plasma, and electron beam

  18. Ultra-high-contrast laser acceleration of relativistic electrons in solid targets

    E-Print Network [OSTI]

    Higginson, Drew Pitney

    2013-01-01

    Inertial Confinement Fusion . . . . . . . . . . . . . . .approach to Inertial Confinement Fusion re- quires laser-to ignite an inertial confinement fusion reac- Alfv´en

  19. Jefferson Lab | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The electrode and insulating base are part of an electron source, which generates electrons for use in particle accelerators. The elements are being tested for high-voltage...

  20. High-Field, J-Class THz Pulses from a Laser Wakefield Accelerator

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    -temporal field distributions in a single shot. The four techniques strongly corroborate detection of THz pulses of several hundred kV/cm. DETECTION TECHNIQUES A 10 TW laser pulse (45 fs, 800 nm) was focused onto the leading edge of a supersonic gas jet of Helium. A wakefield, produced behind the laser pulse

  1. 1997 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 1997 Sun, 04201997 - 11:00pm Free-Electron Lasers for U.S. Industry (Science & Technology) Thu, 04171997 - 11:00pm Accelerating Into Physics (Daily Press) Mon, 04071997...

  2. Energy spread reduction of electron beams produced via laser wakefield acceleration

    E-Print Network [OSTI]

    Pollock, Bradley Bolt

    2012-01-01

    Chapter 5 Chapter 6 Electron Beam Energy Spread Reduction bywake?eld-accelerated electron beams,” Phys. Rev. Lett. (S. M. Hooker, “Gev electron beams from a centimetre-scale

  3. Undulator-Based Laser Wakefield Accelerator Electron Beam Energy Spread and Emittance Diagnostic

    E-Print Network [OSTI]

    Bakeman, M.S.

    2011-01-01

    Accelerator, Undulator, Electron Beam Diagnostic PACS: 52 .of an undulator-based electron beam diagnostic to be used inElectron Beam Energy Spread and Emittance Diagnostic M.S.

  4. Compact laser-driven electron acceleration, bunch compression and coherent nonlinear Thomson scattering

    E-Print Network [OSTI]

    Wong, Liang Jie

    2013-01-01

    Coherent hard x-rays have many medical, commercial and academic research applications. To facilitate the design of a table-top coherent hard x-ray source, this thesis studies the linear acceleration of electrons by optical ...

  5. GeV electron beams from cm-scale channel guided laser wakefield accelerator

    E-Print Network [OSTI]

    2008-01-01

    GeV electron beams from cm-scale channel guided laser wake?the generation of GeV-class electron beams using an intenseranges and high-quality electron beams with energy up to 1

  6. GeV electron beams from a centimeter-scale laser-driven plasma accelerator

    E-Print Network [OSTI]

    2008-01-01

    GeV electron beams from cm-scale channel guided laser wake?the generation of GeV-class electron beams using an intenseranges and high-quality electron beams with energy up to 1

  7. Control of Laser Plasma Based Accelerators up to 1 GeV

    E-Print Network [OSTI]

    Nakamura, Kei

    2008-01-01

    The main e-beam diagnostic, namely the GeV class electronof a diagnostic for the e-beam, namely an electronby the laser pulse diagnostics. Electron Beam Generation As

  8. Proton and Ion Acceleration by BNL Terewatt Picosecond CO2 Laser. New Horizons

    SciTech Connect (OSTI)

    Shkolnikov, Peter

    2014-09-30

    The report covers pioneering research on proton and ion generation in gas jets by the world's first picosecond TW CO2 laser developed at Brookhaven National Laboratory

  9. Laser wakefield acceleration of electrons with ionization injection in a pure N5+ plasma A. J. Goers, S. J. Yoon, J. A. Elle, G. A. Hine, and H. M. Milchberg

    E-Print Network [OSTI]

    Milchberg, Howard

    Laser wakefield acceleration of electrons with ionization injection in a pure N5+ plasma waveguide by the AIP Publishing Articles you may be interested in Dependence of electron trapping on bubble geometry-truncated ionization injection and consequent monoenergetic electron bunches in laser wakefield acceleration Phys

  10. Laser induced electron acceleration in a tapered magnetic wiggler K. P. Singha)

    E-Print Network [OSTI]

    Singh, Kunwar Pal

    is the dephasing of the trapped electron with respect to the driver laser wave. As the electron energy increases Department of Physics, Indian Institute of Technology, New Delhi-110016, India Received 8 July 2003; accepted is satisfied and energy gained by the electron increases. The resonance condition is sensitive to the electron

  11. Investigation of relativistic intensity laser generated hot electron dynamics via copper K{sub ?} imaging and proton acceleration

    SciTech Connect (OSTI)

    Willingale, L.; Thomas, A. G. R.; Maksimchuk, A; Krushelnick, K. [Center for Ultrafast Optical Science, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, Michigan 48109 (United States)] [Center for Ultrafast Optical Science, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, Michigan 48109 (United States); Morace, A. [University of California-San Diego, La Jolla, California 92093 (United States) [University of California-San Diego, La Jolla, California 92093 (United States); Università di Milano-Biocca, Piazza della Scienza 3, 20126 Milano (Italy); Bartal, T.; Kim, J.; Beg, F. N. [University of California-San Diego, La Jolla, California 92093 (United States)] [University of California-San Diego, La Jolla, California 92093 (United States); Stephens, R. B.; Wei, M. S. [General Atomics, San Diego, California 92121 (United States)] [General Atomics, San Diego, California 92121 (United States)

    2013-12-15

    Simultaneous experimental measurements of copper K{sub ?} imaging and the maximum target normal sheath acceleration proton energies from the rear target surface are compared for various target thicknesses. For the T-cubed laser (?4 J, 400 fs) at an intensity of ?2 × 10{sup 19} W cm{sup ?2}, the hot electron divergence is determined to be ?{sub HWHM}?22{sup °} using a K{sub ?} imaging diagnostic. The maximum proton energies are measured to follow the expected reduction with increasing target thickness. Numerical modeling produces copper K{sub ?} trends for both signal level and electron beam divergence that are in good agreement with the experiment. A geometric model describing the electron beam divergence reproduces the maximum proton energy trends observed from the experiment and the fast electron density and the peak electric field observed in the numerical modeling.

  12. Accelerator Development @ Daresbury Laboratory

    E-Print Network [OSTI]

    -injectors ­ Superconducting RF acceleration ­ Cryogenic systems ­ Advanced diagnostics ­ Free Electron Lasers ­ Photon beam radioisotopes. 2 Treatment & Diagnostics #12;Basic Accelerator Configuration 3 Beam Source Low Energy Capture electron beam technology development. 4 Booster Compressor IR-FEL Photoinjector Laser Linac Acceleration

  13. Laser Micromachining: Advantages of Liquid Environments

    E-Print Network [OSTI]

    Petta, Jason

    Laser Micromachining: Advantages of Liquid Environments Marc J. Palmeri Princeton University Arnold Lab #12;Outline · Motivation ­ Applications of laser micromachining ­ Problems with laser micromachining · How do lasers work? · What is laser micromachining? · Micromachining assembly · Methods

  14. The affect of erbium hydride on the conversion efficience to accelerated protons from ultra-shsort pulse laser irradiated foils

    SciTech Connect (OSTI)

    Offermann, D

    2008-09-04

    This thesis work explores, experimentally, the potential gains in the conversion efficiency from ultra-intense laser light to proton beams using erbium hydride coatings. For years, it has been known that contaminants at the rear surface of an ultra-intense laser irradiated thin foil will be accelerated to multi-MeV. Inertial Confinement Fusion fast ignition using proton beams as the igniter source requires of about 10{sup 16} protons with an average energy of about 3MeV. This is far more than the 10{sup 12} protons available in the contaminant layer. Target designs must include some form of a hydrogen rich coating that can be made thick enough to support the beam requirements of fast ignition. Work with computer simulations of thin foils suggest the atomic mass of the non-hydrogen atoms in the surface layer has a strong affect on the conversion efficiency to protons. For example, the 167amu erbium atoms will take less energy away from the proton beam than a coating using carbon with a mass of 12amu. A pure hydrogen coating would be ideal, but technologically is not feasible at this time. In the experiments performed for my thesis, ErH{sub 3} coatings on 5 {micro}m gold foils are compared with typical contaminants which are approximately equivalent to CH{sub 1.7}. It will be shown that there was a factor of 1.25 {+-} 0.19 improvement in the conversion efficiency for protons above 3MeV using erbium hydride using the Callisto laser. Callisto is a 10J per pulse, 800nm wavelength laser with a pulse duration of 200fs and can be focused to a peak intensity of about 5 x 10{sup 19}W/cm{sup 2}. The total number of protons from either target type was on the order of 10{sup 10}. Furthermore, the same experiment was performed on the Titan laser, which has a 500fs pulse duration, 150J of energy and can be focused to about 3 x 10{sup 20} W/cm{sup 2}. In this experiment 10{sup 12} protons were seen from both erbium hydride and contaminants on 14 {micro} m gold foils. Significant improvements were also observed but possibly because of the depletion of hydrogen in the contaminant layer case.

  15. Ultra-low emittance beam generation using two-color ionization injection in a CO2 laser-driven plasma accelerator

    E-Print Network [OSTI]

    Schroeder, C B; Bulanov, S S; Chen, M; Esarey, E; Geddes, C G R; Vay, J -L; Yu, L -L; Leemans, W P

    2015-01-01

    Ultra-low emittance (tens of nm) beams can be generated in a plasma accelerator using ionization injection of electrons into a wakefield. An all-optical method of beam generation uses two laser pulses of different colors. A long-wavelength drive laser pulse (with a large ponderomotive force and small peak electric field) is used to excite a large wakefield without fully ionizing a gas, and a short-wavelength injection laser pulse (with a small ponderomotive force and large peak electric field), co-propagating and delayed with respect to the pump laser, to ionize a fraction of the remaining bound electrons at a trapped wake phase, generating an electron beam that is accelerated in the wake. The trapping condition, the ionized electron distribution, and the trapped bunch dynamics are discussed. Expressions for the beam transverse emittance, parallel and orthogonal to the ionization laser polarization, are presented. An example is shown using a 10-micron CO2 laser to drive the wake and a frequency-doubled Ti:Al2...

  16. Lab 8

    E-Print Network [OSTI]

    Probability Lab. The Problem: Purdue Property and Casualty Co. (PP&C) sells, among other products, car insurance. Sue Purdue, a long standing customer, has

  17. Multistage ion acceleration in finite overdense target with a relativistic laser pulse

    SciTech Connect (OSTI)

    Sinha, Ujjwal [Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)] [Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)

    2013-07-15

    “Multistage ion acceleration” has been analytically and computationally studied in the relativistic regime. For non-relativistic piston velocities, this phenomenon has been described before. But, as we go to relativistic piston velocities, the non-relativistic results hold no more. We have presented a fully relativistic calculation for second stage ion velocities and energies. To verify our calculations, we performed a fully relativistic 1D3V particle in cell simulations using the code LPIC++. It has been found that the relativistic calculations matched very well with the simulation results. Also, it has been seen that at relativistic piston velocities, the non-relativistic results differed by a significant margin. The feasibility of this process has been further established by three dimensional particle in cell simulations.

  18. Study of electron trapping by a transversely ellipsoidal bubble in the laser wake-field acceleration

    SciTech Connect (OSTI)

    Cho, Myung-Hoon; Kim, Young-Kuk; Hur, Min Sup

    2013-09-15

    We present electron trapping in an ellipsoidal bubble which is not well explained by the spherical bubble model by [Kostyukov et al., Phys. Rev. Lett. 103, 175003 (2009)]. The formation of an ellipsoidal bubble, which is elongated transversely, frequently occurs when the spot size of the laser pulse is large compared to the plasma wavelength. First, we introduce the relation between the bubble size and the field slope inside the bubble in longitudinal and transverse directions. Then, we provide an ellipsoidal model of the bubble potential and investigate the electron trapping condition by numerical integration of the equations of motion. We found that the ellipsoidal model gives a significantly less restrictive trapping condition than that of the spherical bubble model. The trapping condition is compared with three-dimensional particle-in-cell simulations and the electron trajectory in test potential simulations.

  19. Christoph W. Leemann Named Jefferson Lab Director | Jefferson...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    National Laboratory where he had been involved in the design and construction of high-energy accelerators since 1970. "As the new Jefferson Lab director Christoph Leemann will...

  20. Governor to Join Jefferson Lab in Celebrating Completion of Accelerato...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Governor to Join Jefferson Lab in Celebrating Completion of Accelerator Upgrade Construction CEBAF Race Track This aerial photo shows the outline of the racetrack-shaped CEBAF...

  1. Zooming in on a proton packed with surprises | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lab experiments, researchers directed the accelerator's polarized electron beam toward liquid hydrogen cooled to 17 Kelvin (-429F). Each electron in the beam has an intrinsic...

  2. Argonne National Laboratory Partners with Advanced Magnet Lab...

    Broader source: Energy.gov (indexed) [DOE]

    next generation wind turbines and accelerate the deployment of advanced turbines for offshore wind energy in the United States. ANL will work with Magnet Lab, Emerson Electric...

  3. JLab Scientist Develops Portrait of a Gremlin | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    microscope. When an expensive accelerator component designed for the International Linear Collider failed to perform as expected, Jefferson Lab scientists set out to find...

  4. Swapan Chattopadhyay Named as AAAS Fellow | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Chattopadhyay click for hi-resolution image Swapan Chattopadhyay, Jefferson Lab's Associate Director for Accelerators, now a 2005 Fellow of the American Association for the...

  5. A new method of measuring the poloidal magnetic and radial electric fields in a tokamak using a laser-accelerated ion-beam trace probe

    SciTech Connect (OSTI)

    Yang, X. Y.; Chen, Y. H.; Lin, C.; Wang, X. G.; Xiao, C. J., E-mail: cjxiao@pku.edu.cn [State Key Labaratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 (China); Wang, L. [Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190 (China); Xu, M. [Center for Fusion Science of Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041 (China)

    2014-11-15

    Both the poloidal magnetic field (B{sub p}) and radial electric field (E{sub r}) are significant in magnetic confinement devices. In this paper, a new method was proposed to diagnose both B{sub p} and E{sub r} at the same time, which was named Laser-accelerated Ion-beam Trace Probe (LITP). This method based on the laser-accelerated ion beam, which has three properties: large energy spread, short pulse lengths, and multiple charge states. LITP can provide the 1D profiles, or 2D images of both B{sub p} and E{sub r}. In this paper, we present the basic principle and some preliminary theoretical results.

  6. Jefferson Lab Leadership Council - Dr. Andrew Hutton

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    GEORGE NEIL Associate Director for FEL Division George Neil is Senior Team Lead for the LCLS-II Project at the Thomas Jefferson National Accelerator Facility (Jefferson Lab), a...

  7. Lab VIII 1 LABORATORY VIII

    E-Print Network [OSTI]

    Minnesota, University of

    Lab VIII ­ 1 LABORATORY VIII MECHANICAL OSCILLATIONS In most of the laboratory problems constant. In this set of laboratory problems the force on an object, and thus its acceleration, will change this laboratory, you should be able to: · provide a qualitative explanation of the behavior of oscillating systems

  8. 13S C I D A C R E V I E W S U M M E R 2 0 0 9 W W W . S C I D A C R E V I E W . O R G LASER P LASM A PART ICLE ACCELERATORS

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    simulations provide physical insight into the development of next-generation accelerators that use laser-driven-energy electron accelerators have already driven a revo- lution in materials science and biology by pow- ering at the Lasers, Optical Accelerator Systems Integrated Studies (LOASIS) program at Lawrence Berkeley National

  9. Application of Plasma Waveguides to High Energy Accelerators

    SciTech Connect (OSTI)

    Milchberg, Howard M

    2013-03-30

    The eventual success of laser-plasma based acceleration schemes for high-energy particle physics will require the focusing and stable guiding of short intense laser pulses in reproducible plasma channels. For this goal to be realized, many scientific issues need to be addressed. These issues include an understanding of the basic physics of, and an exploration of various schemes for, plasma channel formation. In addition, the coupling of intense laser pulses to these channels and the stable propagation of pulses in the channels require study. Finally, new theoretical and computational tools need to be developed to aid in the design and analysis of experiments and future accelerators. Here we propose a 3-year renewal of our combined theoretical and experimental program on the applications of plasma waveguides to high-energy accelerators. During the past grant period we have made a number of significant advances in the science of laser-plasma based acceleration. We pioneered the development of clustered gases as a new highly efficient medium for plasma channel formation. Our contributions here include theoretical and experimental studies of the physics of cluster ionization, heating, explosion, and channel formation. We have demonstrated for the first time the generation of and guiding in a corrugated plasma waveguide. The fine structure demonstrated in these guides is only possible with cluster jet heating by lasers. The corrugated guide is a slow wave structure operable at arbitrarily high laser intensities, allowing direct laser acceleration, a process we have explored in detail with simulations. The development of these guides opens the possibility of direct laser acceleration, a true miniature analogue of the SLAC RF-based accelerator. Our theoretical studies during this period have also contributed to the further development of the simulation codes, Wake and QuickPIC, which can be used for both laser driven and beam driven plasma based acceleration schemes. We will continue our development of advanced simulation tools by modifying the QuickPIC algorithm to allow for the simulation of plasma particle pick-up by the wake fields. We have also performed extensive simulations of plasma slow wave structures for efficient THz generation by guided laser beams or accelerated electron beams. We will pursue experimental studies of direct laser acceleration, and THz generation by two methods, ponderomotive-induced THz polarization, and THz radiation by laser accelerated electron beams. We also plan to study both conventional and corrugated plasma channels using our new 30 TW in our new lab facilities. We will investigate production of very long hydrogen plasma waveguides (5 cm). We will study guiding at increasing power levels through the onset of laser-induced cavitation (bubble regime) to assess the role played by the preformed channel. Experiments in direct acceleration will be performed, using laser plasma wakefields as the electron injector. Finally, we will use 2-colour ionization of gases as a high frequency THz source (<60 THz) in order for femtosecond measurements of low plasma densities in waveguides and beams.

  10. Optically pulsed electron accelerator

    DOE Patents [OSTI]

    Fraser, J.S.; Sheffield, R.L.

    1985-05-20

    An optically pulsed electron accelerator can be used as an injector for a free electron laser and comprises a pulsed light source, such as a laser, for providing discrete incident light pulses. A photoemissive electron source emits electron bursts having the same duration as the incident light pulses when impinged upon by same. The photoemissive electron source is located on an inside wall of a radiofrequency-powered accelerator cell which accelerates the electron burst emitted by the photoemissive electron source.

  11. Optically pulsed electron accelerator

    DOE Patents [OSTI]

    Fraser, John S. (Los Alamos, NM); Sheffield, Richard L. (Los Alamos, NM)

    1987-01-01

    An optically pulsed electron accelerator can be used as an injector for a free electron laser and comprises a pulsed light source, such as a laser, for providing discrete incident light pulses. A photoemissive electron source emits electron bursts having the same duration as the incident light pulses when impinged upon by same. The photoemissive electron source is located on an inside wall of a radio frequency powered accelerator cell which accelerates the electron burst emitted by the photoemissive electron source.

  12. Two-Dimensional Simulation Analysis of the Standing-wave Free-electron Laser Two-Beam Accelerator

    E-Print Network [OSTI]

    Wang, C.

    2008-01-01

    and S. Yu, "Relativistic klystron simulations using RKTW2D,"dimensional relativistic klystron code, developed by Ryneand the relativistic klystron two-beam accelerator. In this

  13. LAB HAZARD CHECKLIST Please check the hazards that are associated with your lab and complete the section

    E-Print Network [OSTI]

    Firestone, Jeremy

    LAB HAZARD CHECKLIST Please check the hazards that are associated with your lab and complete of Environmental Health and Safety. HAZARDS: Biological Hazard ­ Biosafety levels 2 or 3 organisms present Laser Radiation Hazards ­Any work involving class 3b or 4 lasers Flammable Gas ­ Compressed gas cylinders

  14. Generation of 500 MeV-1 GeV energy electrons from laser wakefield acceleration via ionization induced injection using CO{sub 2} mixed in He

    SciTech Connect (OSTI)

    Mo, M. Z.; Ali, A.; Fedosejevs, R. [Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 2V4 (Canada)] [Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 2V4 (Canada); Fourmaux, S.; Lassonde, P.; Kieffer, J. C. [INRS-EMT, Universite du Quebec, 1650 Lionel Boulet, Varennes, Quebec J3X 1S2 (Canada)] [INRS-EMT, Universite du Quebec, 1650 Lionel Boulet, Varennes, Quebec J3X 1S2 (Canada)

    2013-04-01

    Laser wakefield acceleration of 500 MeV to 1 GeV electron bunches has been demonstrated using ionization injection in mixtures of 4% to 10% of CO{sub 2} in He. 80 TW laser pulses were propagated through 5 mm gas jet targets at electron densities of 0.4-1.5 Multiplication-Sign 10{sup 19}cm{sup -3}. Ionization injection led to lower density thresholds, a higher total electron charge, and an increased probability of producing electrons above 500 MeV in energy compared to self-injection in He gas alone. Electrons with GeV energies were also observed on a few shots and indicative of an additional energy enhancement mechanism.

  15. Lasers Used to Make First Boron-Nitride Nanotube Yarn | Jefferson...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    with Jefferson Lab's Free-Electron Laser and later perfected using a commercial welding laser. In this technique, the laser beam strikes a target inside a chamber filled...

  16. Nuclear Physics: Archived Talks - Accelerator

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Free Electron Laser (FEL) Medical Imaging Physics Topics Campaigns Meetings Recent Talks Archived Talks Accelerator Hall A Hall B Hall C 12 GeV Upgrade Experimental Techniques...

  17. Charged particle accelerator grating

    DOE Patents [OSTI]

    Palmer, Robert B. (Shoreham, NY)

    1986-01-01

    A readily disposable and replaceable accelerator grating for a relativistic particle accelerator. The grating is formed for a plurality of liquid droplets that are directed in precisely positioned jet streams to periodically dispose rows of droplets along the borders of a predetermined particle beam path. A plurality of lasers are used to direct laser beams into the droplets, at predetermined angles, thereby to excite the droplets to support electromagnetic accelerating resonances on their surfaces. Those resonances operate to accelerate and focus particles moving along the beam path. As the droplets are distorted or destroyed by the incoming radiation, they are replaced at a predetermined frequency by other droplets supplied through the jet streams.

  18. Seventy Five Years of Particle Accelerators (LBNL Summer Lecture Series)

    ScienceCinema (OSTI)

    Sessler, Andy

    2011-04-28

    Summer Lecture Series 2006: Andy Sessler, Berkeley Lab director from 1973 to 1980, sheds light on the Lab's nearly eight-decade history of inventing and refining particle accelerators, which continue to illuminate the nature of the universe.

  19. Relativistic Laser-Matter Interactions

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Relativistic Laser-Matter Interactions Relativistic Laser-Matter Interactions Enabling the next generation of intense particle accelerators Contact Juan Fernandez (505) 667-6575...

  20. Accelerator Design Study for a Soft X-Ray Free Electron Laser at the Lawrence Berkeley National Laboratory

    E-Print Network [OSTI]

    Kur, E.

    2010-01-01

    and Phase Diagnostics, SLAC Report LCLS-TN-00-12. Emma P.al. 2009, First Results of the LCLS Laser-Heater System, PACLinac Coherent Light Source (LCLS) Conceptual Design Report,

  1. Design of an XUV FEL Driven by the Laser-Plasma Accelerator at the LBNL LOASIS Facility

    E-Print Network [OSTI]

    Schroeder, Carl B.; Fawley, W.M.; Esarey, Eric; Leemans, W.P.

    2006-01-01

    Table 2 shows the expected FEL performance employing a 31-nmDESIGN OF AN XUV FEL DRIVEN BY THE LASER-PLASMA ACCELERATORa design for a compact FEL source of ultra- fast, high-

  2. Accelerator on a Chip

    ScienceCinema (OSTI)

    England, Joel

    2014-07-16

    SLAC's Joel England explains how the same fabrication techniques used for silicon computer microchips allowed their team to create the new laser-driven particle accelerator chips. (SLAC Multimedia Communications)

  3. Jefferson Lab injector development for next generation parity violation experiments

    SciTech Connect (OSTI)

    J. Grames, J. Hansknect, M. Poelker, R. Suleiman

    2011-05-01

    To meet the challenging requirements of next generation parity violation experiments at Jefferson Lab, the Center for Injectors and Sources is working on improving the parity-quality of the electron beam. These improvements include new electron photogun design and fast helicity reversal of the Pockels Cell. We proposed and designed a new scheme for slow helicity reversal using a Wien Filter and two Solenoids. This slow reversal complements the insertable half-wave plate reversal of the laser-light polarization by reversing the electron beam polarization at the injector while maintaining a constant accelerator configuration. For position feedback, fast air-core magnets located in the injector were commissioned and a new scheme for charge feedback is planned.

  4. PLC Support Software at Jefferson Lab

    SciTech Connect (OSTI)

    P. Chevtsov; S. Higgins; S. Schaffner; D. Seidman

    2002-10-01

    Several Automation Direct (DirectNet) Programmable Logic Controllers (PLCs) have been integrated into the accelerator control system at Jefferson Lab. The integration is based on new software that consists of three main parts: a PLC driver with a state machine control block, a device support module, and a common serial driver. The components of new software and experience gained with the use of this software for beam dump systems at Jefferson Lab are presented.

  5. Berkeley Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O OLaura| National2.11DESERT * LOWBenefits DOEBennoBerkeley Lab

  6. Berkeley Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery ActTools toBadging, BadgeBecoming anBerkeley Lab

  7. Lab Astrophysics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid you notHeat Pumps HeatTechnologies|Articles2012 2 spaceWebLab

  8. Lasers

    SciTech Connect (OSTI)

    1995-01-01

    The scope of our research in laser and related technologies has grown over the years and has attracted a broad user base for applications within DOE, DOD, and private industry. Within the next few years, we expect to begin constructing the National Ignition Facility, to make substantial progress in deploying AVLIS technology for uranium and gadolinium enrichment, and to develop new radar sensing techniques to detect underwater objects. Further, we expect to translate LLNL patent ideas in microlithography into useful industrial products and to successfully apply high-power, diode-based laser technology to industrial and government applications.

  9. Quality Assurance | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Quality Assurance Is A Key Focus At Jefferson Lab Quality assurance is a critical function at Jefferson Lab, protecting workers, lab facilities, the environment and the public. A D...

  10. Theory Center | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Science Jefferson Lab Theory Center Theoretical research at Jefferson Lab is critical to the lab's efforts to fulfill its scientific mission. A D D I T I O N A L L I N K S:...

  11. Charged-particle acceleration and energy loss in laser-produced plasmas D. G. Hicks,a)

    E-Print Network [OSTI]

    the interpretation of their spectra. Strong electric fields are created when hot electrons, generated by laser energy shifts were dominated by energy losses in the target, allowing fundamental charged as the corona where strong electric fields may exist. As a result, the energy spectrum of charged fusion

  12. Production of a monoenergetic electron bunch in a self-injected laser-wakefield accelerator C.-L. Chang,1

    E-Print Network [OSTI]

    electrons. The tomographic method adds a crucial dimension to the whole array of existing diagnostics for laser beams, plasma waves, and electron beams. With this method the details of the underlying physical limitations on applications. Recently pro- duction of well-collimated electron beam with up to GeV energy

  13. Induction of electron injection and betatron oscillation in a plasma-waveguide-based laser wakefield accelerator by modification of waveguide structure

    SciTech Connect (OSTI)

    Ho, Y.-C.; Hung, T.-S.; Chen, W.-H. [Department of Physics, National Central University, Jhong-Li 320, Taiwan (China) [Department of Physics, National Central University, Jhong-Li 320, Taiwan (China); Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan (China); Jhou, J.-G. [Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan (China) [Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan (China); Department of Physics, National Taiwan University, Taipei 106, Taiwan (China); Qayyum, H.; Chen, S.-Y. [Department of Physics, National Central University, Jhong-Li 320, Taiwan (China) [Department of Physics, National Central University, Jhong-Li 320, Taiwan (China); Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan (China); Molecular Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan (China); Chu, H.-H. [Department of Physics, National Central University, Jhong-Li 320, Taiwan (China)] [Department of Physics, National Central University, Jhong-Li 320, Taiwan (China); Lin, J.-Y. [Department of Physics, National Chung Cheng University, Chia-Yi 621, Taiwan (China)] [Department of Physics, National Chung Cheng University, Chia-Yi 621, Taiwan (China); Wang, J. [Department of Physics, National Central University, Jhong-Li 320, Taiwan (China) [Department of Physics, National Central University, Jhong-Li 320, Taiwan (China); Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan (China); Department of Physics, National Taiwan University, Taipei 106, Taiwan (China)

    2013-08-15

    By adding a transverse heater pulse into the axicon ignitor-heater scheme for producing a plasma waveguide, a variable three-dimensionally structured plasma waveguide can be fabricated. With this technique, electron injection in a plasma-waveguide-based laser wakefield accelerator was achieved and resulted in production of a quasi-monoenergetic electron beam. The injection was correlated with a section of expanding cross-section in the plasma waveguide. Moreover, the intensity of the X-ray beam produced by the electron bunch in betatron oscillation was greatly enhanced with a transversely shifted section in the plasma waveguide. The technique opens a route to a compact hard-X-ray pulse source.

  14. Enhancement of proton energy by polarization switch in laser acceleration of multi-ion Tung-Chang Liu, Xi Shao, Chuan-Sheng Liu, Bengt Eliasson, Jyhpyng Wang, and Shih-Hung Chen

    E-Print Network [OSTI]

    -Chang Liu, Xi Shao, Chuan-Sheng Liu, Bengt Eliasson, Jyhpyng Wang, and Shih-Hung Chen Citation: Physics by polarization switch in laser acceleration of multi-ion foils Tung-Chang Liu,1,a) Xi Shao,1 Chuan-Sheng Liu,1

  15. 2008 - 10 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 2008 Fri, 10242008 - 3:00pm Jefferson Lab electron beam charges up Mon, 10062008 - 3:00pm Jefferson Lab, ODU team up for center...

  16. 2002 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Physicist Wins American Physical Society Award Thu, 04042002 - 1:00pm Commonwealth, High-Tech Leaders Recognize 14 Jefferson Lab Staff Members for Patent Work...

  17. 2002 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Physicist Wins American Physical Society Award Thu, 04042002 - 1:00pm Commonwealth, High-Tech Leaders Recognize 14 Jefferson Lab Staff Members for Patent Work...

  18. Policymakers | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Construction Policymakers Construction at Jefferson Lab The Technology & Engineering Development Facility or TEDF is one of the new facilities being constructed at Jefferon Lab is...

  19. Construction | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Policymakers Construction at Jefferson Lab The Technology & Engineering Development Facility or TEDF is one of the new facilities being constructed at Jefferon Lab is support of...

  20. Business Services | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    products and services that support the lab's overall mission. Managing the lab's vendor process is the Procurement & Services department. The department is dedicated to the...

  1. Science | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    GeV Upgrade will greatly expand the research capabilities of Jefferson Lab, adding a fourth experimental hall, upgrading existing halls and doubling the power of the lab's...

  2. Employees | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Read more Emergency Information Employees Jefferson Lab Emergency Drill Jefferson Lab conducts regular exercises and drills to continually improve safety and emergency procedures...

  3. 2004 - 09 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    September 2004 Tue, 09212004 - 2:00pm Catch Jefferson Lab's entertaining, educational Cryogenics Demonstration at the Virginia State Fair Fri, 09102004 - 2:00pm Jefferson Lab...

  4. Jefferson Lab Public Affairs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Electronic Media print version Public Affairs Links Home Journalists' Newsroom Media Photographic Archives What is Jefferson Lab? Community Outreach Jefferson Lab Graphic Identity...

  5. Jefferson Lab Human Resources

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Emeritus Program Approved by the JSA Compensation Committee Candidature Upon retirement from Jefferson Lab, a former employee may be considered for and appointed to,...

  6. Nuclear Imaging | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Jefferson Lab's Radiation Detector and Imaging Group Members of Jefferson Lab's Radiation Detector & Medical Imaging Group design and build unique imaging devices based on...

  7. 1997 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Scientific Motivation and Research Program (Nuclear Physics News) Mon, 03171997 - 12:00am Laboratory Profile: Jefferson Lab Introduction (Nuclear Physics News)...

  8. 2014 - 06 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Awarded 2014 Prize to Support Research Work with Jefferson Lab Thu, 06052014 - 2:57pm Young Physicist from Syracuse University Receives Jefferson Lab's 2014 Thesis Prize...

  9. Careers | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    interesting and challenging jobs in pursuit of a greater understanding of the visible universe. Read more Job Openings Careers Jobs at Jefferson Lab Jefferson Lab offers many...

  10. EA-1655: Finding of No Significant Impact

    Broader source: Energy.gov [DOE]

    The Berkeley Lab Laser Accelerator (BELLA) Laser Acquisition, Installation and Use for Research and Development

  11. EA-1655: Final Environmental Assessment

    Office of Energy Efficiency and Renewable Energy (EERE)

    Berkeley Lab Laser Accelerator (BELLA) Laser Acquisition, Installation and Use for Research and Development

  12. The Brookhaven National Laboratory Accelerator Test Facility

    SciTech Connect (OSTI)

    Batchelor, K.

    1992-01-01

    The Brookhaven National Laboratory Accelerator Test Facility comprises a 50 MeV traveling wave electron linear accelerator utilizing a high gradient, photo-excited, raidofrequency electron gun as an injector and an experimental area for study of new acceleration methods or advanced radiation sources using free electron lasers. Early operation of the linear accelerator system including calculated and measured beam parameters are presented together with the experimental program for accelerator physics and free electron laser studies.

  13. The Brookhaven National Laboratory Accelerator Test Facility

    SciTech Connect (OSTI)

    Batchelor, K.

    1992-09-01

    The Brookhaven National Laboratory Accelerator Test Facility comprises a 50 MeV traveling wave electron linear accelerator utilizing a high gradient, photo-excited, raidofrequency electron gun as an injector and an experimental area for study of new acceleration methods or advanced radiation sources using free electron lasers. Early operation of the linear accelerator system including calculated and measured beam parameters are presented together with the experimental program for accelerator physics and free electron laser studies.

  14. Berkeley Lab Compact Accelerator Sets World Record

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    laboratories and universities researching a wide range of problems in combustion, climate modeling, fusion energy, materials science, physics, chemistry, computational...

  15. Berkeley Lab Computing Sciences: Accelerating Scientific Discovery

    E-Print Network [OSTI]

    Hules, John A

    2009-01-01

    COMPUTING SCIENCES Chemistry Fusion Energy Materials Scienceclimate change, combustion, fusion energy, nanotechnol- ogy,

  16. Lab announces Venture Acceleration Fund recipients

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate student Subtask22Background About UsGame-Changers

  17. Electrons in a relativistic-intensity laser field: generation of zeptosecond electromagnetic pulses and energy spectrum of the accelerated electrons

    SciTech Connect (OSTI)

    Andreev, A A; Galkin, A L; Kalashnikov, M P; Korobkin, V V; Romanovsky, Mikhail Yu; Shiryaev, O B [A M Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

    2011-08-31

    We study the motion of an electron and emission of electromagnetic waves by an electron in the field of a relativistically intense laser pulse. The dynamics of the electron is described by the Newton equation with the Lorentz force in the right-hand side. It is shown that the electrons may be ejected from the interaction region with high energy. The energy spectrum of these electrons and the technique of using the spectrum to assess the maximal intensity in the focus are analysed. It is found that electromagnetic radiation of an electron moving in an intense laser field occurs within a small angle around the direction of the electron trajectory tangent. The tangent quickly changes its direction in space; therefore, electromagnetic radiation of the electron in the far-field zone in a certain direction in the vicinity of the tangent is a short pulse with a duration as short as zeptoseconds. The calculation of the temporary and spectral distribution of the radiation field is carried out. (superintense laser fields)

  18. Illustrious Visitors Good Hosts Real Celebrity | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of ICFA, the International Committee on Future Accelerators, asked for a couple of pictures of Jefferson Lab in the snow. He is preparing a report that will include the ICFA...

  19. Searching for Cosmic Accelerators via IceCube

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Searching for Cosmic Accelerators via IceCube Searching for Cosmic Accelerators via IceCube Berkeley Lab Researchers Part of an International Hunt November 21, 2013 Lynn Yarris,...

  20. 2000 - 08 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    August 2000 Thu, 08312000 - 2:00pm Christoph Leeman becomes Jefferson Lab's first Deputy Director...

  1. D-Cluster Converter Foil for Laser-Accelerated Deuteron Beams: Towards Deuteron-Beam-Driven Fast Ignition

    SciTech Connect (OSTI)

    Miley, George H.

    2012-10-24

    Fast Ignition (FI) uses Petawatt laser generated particle beam pulse to ignite a small volume called a pre-compressed Inertial Confinement Fusion (ICF) target, and is the favored method to achieve the high energy gain per target burn needed for an attractive ICF power plant. Ion beams such as protons, deuterons or heavier carbon ions are especially appealing for FI as they have relative straight trajectory, and easier to focus on the fuel capsule. But current experiments have encountered problems with the 'converter-foil' which is irradiated by the Petawatt laser to produce the ion beams. The problems include depletion of the available ions in the convertor foils, and poor energy efficiency (ion beam energy/ input laser energy). We proposed to develop a volumetrically-loaded ultra-high-density deuteron deuterium cluster material as the basis for converter-foil for deuteron beam generation. The deuterons will fuse with the ICF DT while they slow down, providing an extra 'bonus' energy gain in addition to heating the hot spot. Also, due to the volumetric loading, the foil will provide sufficient energetic deuteron beam flux for 'hot spot' ignition, while avoiding the depletion problem encountered by current proton-driven FI foils. After extensive comparative studies, in Phase I, high purity PdO/Pd/PdO foils were selected for the high packing fraction D-Cluster converter foils. An optimized loading process has been developed to increase the cluster packing fraction in this type of foil. As a result, the packing fraction has been increased from 0.1% to 10% - meeting the original Phase I goal and representing a significant progress towards the beam intensities needed for both FI and pulsed neutron applications. Fast Ignition provides a promising approach to achieve high energy gain target performance needed for commercial Inertial Confinement Fusion (ICF). This is now a realistic goal for near term in view of the anticipated ICF target burn at the National Ignition Facility (NIF) in CA within a year. This will usher in the technology development Phase of ICF after years of research aimed at achieving breakeven experiment. Methods to achieve the high energy gain needed for a competitive power plant will then be a key developmental issue, and our D-cluster target for Fast Ignition (FI) is expected to meet that need.

  2. Seventy Five Years of Particle Accelerators

    ScienceCinema (OSTI)

    Andy Sessler

    2013-06-11

    Andy Sessler, Berkeley Lab director from 1973 to 1980, sheds light on the Lab's nearly eight-decade history of inventing and refining particle accelerators, which continue to illuminate the nature of the universe. His talk was presented July 26, 2006.

  3. National Lab Day - Open House | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    It is the work of a New York-based educational organization that seeks to improve science and math education nationally. The National Labs are participating in this...

  4. Laser Stabilization

    SciTech Connect (OSTI)

    Hall, John L.; Taubman, Matthew S.; Ye, Jun

    2010-01-01

    This book chapter covers the basics of the field of stabilizing lasers to optical frequency references such as optical cavities and molecular transitions via the application of servo control systems. These discussions are given with reference to the real-life frequency metrology experienced in Hall-Labs (now Ye-Labs), JILA, University of Colorado. The subjects covered include: the basics of control system stability, a discussion of both the theoretical and experimental limitations, an outline of optical cavity susceptibility to environmental noise, and a brief introduction to the use and limitations of molecular transitions as frequency references.

  5. Accelerator on a Chip: How It Works

    SciTech Connect (OSTI)

    2014-06-30

    In an advance that could dramatically shrink particle accelerators for science and medicine, researchers used a laser to accelerate electrons at a rate 10 times higher than conventional technology in a nanostructured glass chip smaller than a grain of rice.

  6. Charged particle accelerator grating

    DOE Patents [OSTI]

    Palmer, R.B.

    1985-09-09

    A readily disposable and replaceable accelerator grating for a relativistic particle accelerator is described. The grating is formed for a plurality of liquid droplets that are directed in precisely positioned jet streams to periodically dispose rows of droplets along the borders of a predetermined particle beam path. A plurality of lasers are used to direct laser beams onto the droplets, at predetermined angles, thereby to excite the droplets to support electromagnetic accelerating resonances on their surfaces. Those resonances operate to accelerate and focus particles moving along the beam path. As the droplets are distorted or destroyed by the incoming radiation, they are replaced at a predetermined frequency by other droplets supplied through the jet streams.

  7. Accelerator Technology Division progress report, FY 1992

    SciTech Connect (OSTI)

    Schriber, S.O.; Hardekopf, R.A.; Heighway, E.A.

    1993-07-01

    This report briefly discusses the following topics: The Ground Test Accelerator Program; Defense Free-Electron Lasers; AXY Programs; A Next Generation High-Power Neutron-Scattering Facility; JAERI OMEGA Project and Intense Neutron Sources for Materials Testing; Advanced Free-Electron Laser Initiative; Superconducting Supercollider; The High-Power Microwave (HPM) Program; Neutral Particle Beam (NPB) Power Systems Highlights; Industrial Partnering; Accelerator Physics and Special Projects; Magnetic Optics and Beam Diagnostics; Accelerator Design and Engineering; Radio-Frequency Technology; Accelerator Theory and Free-Electron Laser Technology; Accelerator Controls and Automation; Very High-Power Microwave Sources and Effects; and GTA Installation, Commissioning, and Operations.

  8. 2008 - 10 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 2008 Fri, 10242008 - 12:00am Jefferson Lab electron beam charges up (Inside Business) Mon, 10062008 - 12:00am Jefferson Lab, ODU team up for center (Inside Business...

  9. 2015 - 08 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    August 2015 Mon, 08312015 - 11:33am Jefferson Lab to Test Tornado Warning Siren at 10:30 a.m. on Friday, Sept. 4 Wed, 08262015 - 8:49am Celebrate Jefferson Lab Safety Milestone...

  10. IT Division | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Information Technology At Jefferson Lab High-performance computing is essential to the success of the experimental program at Jefferson Lab. A D D I T I O N A L L I N K S: IT Home...

  11. 2014 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2014 Wed, 04302014 - 4:43pm Jefferson Lab Weekly Briefs April 30, 2014 Wed, 04232014 - 5:50pm Jefferson Lab Weekly Briefs April 23, 2014 Wed, 04162014 - 7:05pm...

  12. 2014 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    July 2014 Wed, 07302014 - 6:42pm Jefferson Lab Weekly Briefs July 30, 2014 Wed, 07232014 - 5:39pm Jefferson Lab Weekly Briefs July 23, 2014 Wed, 07162014 - 6:25pm Jefferson...

  13. SRF Institute | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lab Jefferson Lab's SRF Institute designs, manufactures, assembles and tests SRF technology, such as these niobium cavities, for facilities worldwide. A D D I T I O N A L...

  14. Emergency Information | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Employees Jefferson Lab Emergency Drill Jefferson Lab conducts regular exercises and drills to continually improve safety and emergency procedures. A D D I T I O N A L L I N K S:...

  15. 2008 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    at Jefferson Lab February 2008 Tue, 02262008 - 1:00pm Media Advisory: March 1 Middle School Science Bowl Tournament Mon, 02252008 - 2:15pm Jefferson Lab Hosts 20 Teams for...

  16. 2009 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Remote Control On April 14 Mon, 03022009 - 1:00pm Jefferson Lab Hosts 23 Teams for Middle School Science Bowl on March 7 February 2009 Thu, 02192009 - 1:00pm Jefferson Lab...

  17. 2004 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2004 Thu, 04152004 - 2:00pm Jefferson Lab recognizes its Outstanding Small Business Contractor for FY 2003 Mon, 04122004 - 2:00pm Jefferson Lab invites families, groups...

  18. 2015 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2015 Wed, 04292015 - 4:37pm Jefferson Lab Weekly Briefs April 29, 2015 Wed, 04222015 - 2:02pm Jefferson Lab Weekly Briefs April 22, 2015 Wed, 04152015 - 5:37pm...

  19. 2015 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    July 2015 Wed, 07292015 - 5:01pm Jefferson Lab Weekly Briefs July 29, 2015 Wed, 07222015 - 4:00pm Jefferson Lab Weekly Briefs July 22, 2015 Wed, 07152015 - 9:52pm Jefferson...

  20. 2005 - 10 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2:00pm Jefferson Lab announces two Fall Science Series events -- featuring magic and football Tue, 10042005 - 2:00pm Jefferson Lab News -Dept. of Energy co-sponsors Oct. 11th...

  1. 2013 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 2013 Wed, 03272013 - 2:55pm Jefferson Lab Weekly Briefs March 27, 2013 Wed, 03202013 - 2:11pm Jefferson Lab Weekly Briefs March 20, 2013 Wed, 03132013 - 5:24pm...

  2. 2013 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    3 Wed, 12182013 - 3:04pm Jefferson Lab Weekly Briefs December 18, 2013 Wed, 12112013 - 2:43pm Jefferson Lab Weekly Briefs December 11, 2013 Wed, 12042013 - 1:07pm Jefferson...

  3. 2014 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    July 2014 Thu, 07312014 - 5:19pm Message from Mike Dallas: Lab's Top IT Division Position to Turn Over Thu, 07312014 - 9:08am Lab Community Mourns Death of Colleague, Alexander...

  4. 2014 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    4 Wed, 12172014 - 5:26pm Jefferson Lab Weekly Briefs December 17, 2014 Wed, 12102014 - 6:59pm Jefferson Lab Weekly Briefs December 10, 2014 Wed, 12032014 - 6:13pm Jefferson...

  5. 2001 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 2001 Wed, 03212001 - 2:00pm Six NN High School Students Win Jefferson Lab Externships Wed, 03212001 - 2:00pm Jones O. & Associates of Hampton wins Jefferson Lab's...

  6. 2010 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lab and Jefferson Science Associates Bring First School of Physics to Sub-Saharan Africa Mon, 07262010 - 2:00pm Media Advisory - Jefferson Lab Hosts Summer Intern Science...

  7. 2015 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 2015 Thu, 10152015 - 8:38am Jefferson Lab Weekly Briefs October 15, 2015 Wed, 10072015 - 5:07pm Jefferson Lab Weekly Briefs October 7, 2015 Thu, 10012015 - 8:00am...

  8. 2000 - 10 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 2000 Wed, 10112000 - 11:00pm Jefferson Lab: Cancer-seeking Camera Demystifies Research Lab (Daily Press) Sat, 10072000 - 11:00pm Breast Cancer Biopsies Could Be Things...

  9. 2009 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2009 Sun, 07052009 - 11:00pm Jefferson Lab creates better way to discover breast cancer Sun, 07052009 - 11:00pm Jefferson Lab employee invents low-tech gizmo to protect...

  10. 2008 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2008 Thu, 10232008 - 11:00pm Jefferson Lab electron beam charges up (Inside Business) Sun, 10052008 - 11:00pm Jefferson Lab, ODU team up for center (Inside Business) September...

  11. 2011 - 09 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    September 2011 Sun, 09252011 - 2:00pm Jefferson Lab Weekly Briefs September 28, 2011 Wed, 09212011 - 2:00pm Jefferson Lab Weekly Briefs September 21, 2011 Wed, 09142011 -...

  12. 2008 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2008 Sun, 04132008 - 11:00pm Jefferson Lab finds its man Mont (Inside Business) Wed, 04022008 - 11:00pm New director of Jefferson Lab named (Daily Press) Wed, 04022008...

  13. 2011 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 2011 Mon, 05232011 - 1:00pm National labs offer computing time to Japanese physicists Wed, 05112011 - 1:00pm Two Jefferson Lab Scientists Win Prestigious Early Career...

  14. 2004 - 10 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 2004 Sun, 10242004 - 12:00am efferson Lab Hopes to Bulk Up 'Strong Force' Theory (Daily Press) Mon, 10042004 - 12:00am Jefferson Lab a Worthy Investment (Roanoke.com...

  15. 2009 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lecture July 2009 Sun, 07052009 - 11:00pm Jefferson Lab creates better way to discover breast cancer Sun, 07052009 - 11:00pm Jefferson Lab employee invents low-tech gizmo to...

  16. 2004 - 06 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 2004 Tue, 06152004 - 2:00pm Jefferson Lab awards 7.3 million construction contract to Chesapeake firm...

  17. 2004 - 08 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    August 2004 Wed, 08112004 - 2:00pm Jefferson Lab Detector Technology Aids Development of Cystic Fibrosis Therapy...

  18. 2001 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2001 Sat, 04212001 - 2:00pm "Science is Cool" at Jefferson Lab's Open House, Saturday, April 21...

  19. 2001 - 02 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    February 2001 Fri, 02092001 - 2:00pm Jefferson Lab's Spring Science Series kicks off with Feb. 13 event...

  20. 2006 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 2006 Sun, 03052006 - 12:00am Faces and Places: Fellowships for US lab directors (CERN Courier...

  1. 2011 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 2011 Wed, 05112011 - 10:31am Two Jefferson Lab Scientists Win Prestigious Early Career Awards...

  2. Optical Probing of CO2 Laser-Plasma Interactions at Near Critical Density

    E-Print Network [OSTI]

    Gong, Chao

    2015-01-01

    351. Tsung, F. , et al. , CO2 Laser acceleration of forwardJoshi, Fifteen terawatt picosecond CO2 laser system. Opticspicosecond, multiwavelength CO2 laser pulse. Applied Optics,

  3. Laser Worker Registration Form (LWRF) Surname: Forenames

    E-Print Network [OSTI]

    Martin, Ralph R.

    ABCDEFGHI Laser Worker Registration Form (LWRF) Surname: Forenames: School of: Ext No.: Email YY Class of Laser to be Used 1 1M 1E 2 2M 3R 3B 4 Work Location(s) Lab No. Laser Work Currently Undertaken Elsewhere Are you currently engaged in work elsewhere involving laser radiation? YES

  4. Terahertz-driven linear electron acceleration

    E-Print Network [OSTI]

    Nanni, Emilio Alessandro; Ravi, Koustuban; Fallahi, Arya; Moriena, Gustavo; Miller, R J Dwayne; Kärtner, Franz X

    2014-01-01

    The cost, size and availability of electron accelerators is dominated by the achievable accelerating gradient. Conventional high-brightness radio-frequency (RF) accelerating structures operate with 30-50 MeV/m gradients. Electron accelerators driven with optical or infrared sources have demonstrated accelerating gradients orders of magnitude above that achievable with conventional RF structures. However, laser-driven electron accelerators require intense sources and suffer from low bunch charge, sub-micron tolerances and sub-femtosecond timing requirements due to the short wavelength of operation. Here, we demonstrate the first linear acceleration of electrons with keV energy gain using optically-generated terahertz (THz) pulses. THz-driven accelerating structures enable high-gradient electron accelerators with simple accelerating structures, high repetition rates and significant charge per bunch. Increasing the operational frequency of accelerators into the THz band allows for greatly increased accelerating ...

  5. Cascaded target normal sheath acceleration

    SciTech Connect (OSTI)

    Wang, W. P.; Shen, B. F.; Zhang, X. M.; Wang, X. F.; Xu, J. C.; Zhao, X. Y.; Yu, Y. H.; Yi, L. Q.; Shi, Y.; Zhang, L. G.; Xu, T. J.; Xu, Z. Z.

    2013-11-15

    A cascaded target normal sheath acceleration (TNSA) scheme is proposed to simultaneously increase energy and improve energy spread of a laser-produced mono-energetic proton beam. An optimum condition that uses the maximum sheath field to accelerate the center of the proton beam is theoretically found and verified by two-dimensional particle-in-cell simulations. An initial 10 MeV proton beam is accelerated to 21 MeV with energy spread decreased from 5% to 2% under the optimum condition during the process of the cascaded TNSA. The scheme opens a way to scale proton energy lineally with laser energy.

  6. 2009 - 02 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Local firms benefit from Jefferson Lab upgrade Mon, 02092009 - 1:00pm Thomas Jefferson High School for Science & Technology Snaps Up Virginia Science Bowl Championship; Virginia...

  7. Education | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Education Science Education staff support a range of educational programs. One popular program is the Physics Fest, seen here. K-12 classes take field trips to...

  8. 2000 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    September 2000 Thu, 09212000 - 2:00pm Federal Laboratory Multiplies Its Research Capacity August 2000 Thu, 08312000 - 2:00pm Christoph Leeman becomes Jefferson Lab's first...

  9. 1997 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Physics News) Mon, 03171997 - 12:00am Laboratory Profile: Jefferson Lab Scientific Motivation and Research Program (Nuclear Physics News) Mon, 03171997 - 12:00am Laboratory...

  10. Research | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    are massive facilities that house sophisticated equipment as large as a house. A fourth experimental hall, Hall D, is under construction. RESEARCH AT JEFFERSON LAB As a...

  11. Jefferson Lab - Employees

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    >

    Jefferson Lab conducts regular exercises and drills to continually improve safety and emergency procedures.
  12. 1995 - 11 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 1995 Sat, 11181995 - 1:00am Beam Up, Running at CEBAF (Daily Press) Wed, 11151995 - 1:00am Research Begins at Jefferson Lab...

  13. 2005 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    July 2005 Fri, 07292005 - 2:00pm News Media invited to interview Jefferson Lab summer science enrichment program participants; cover closing Poster Session Tue, 07262005 -...

  14. 2004 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 2004 Wed, 05122004 - 2:00pm Theoretical physicist Evgeny Epelbaum joined Jefferson Lab late in 2003 as the inaugural Nathan Isgur Distinguished Postdoctoral Fellow...

  15. Jefferson Lab Public Affairs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Web Design Photography Video Portfolio print version Public Affairs Links Home Journalists' Newsroom Media Photographic Archives What is Jefferson Lab? Community Outreach Public...

  16. Jefferson Lab Public Affairs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Electronic Media print version Public Affairs Links Home Journalists' Newsroom Media Photographic Archives What is Jefferson Lab? Community Outreach Public Affairs Director's...

  17. Jefferson Lab Human Resources

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Registration International Services Training and Performance Office Workplace Harassment and Violence Policy forms HR Forms Employment Employment at the Lab Career Opportunities...

  18. Jefferson Lab Human Resources

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Human Resources The Human Resources team is fully integrated with Jefferson Lab's mission, committed to providing quality customer service based on expertise, innovation and...

  19. Jefferson Lab Human Resources

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Assistantship Sponsor Form Jefferson Science Associates MinorityFemale Undergraduate Research Assistantship Jefferson Lab is seeking candidates for a research...

  20. Collaboration | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    its inception. In a previous Montage, I discussed visiting China and the plans for Chinese institutions to participate in experiments at Jefferson Lab. There were...

  1. Jefferson Lab Directorate

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    with Lab stakeholders. Director's Office Leadership Council Public Affairs Office Science Education Office Staff Services 12000 Jefferson Avenue, Newport News, VA 23606 Phone:...

  2. Jefferson Lab - Careers

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    570 en Accessibility https:www.jlab.orgaccessibility

    Lab" src"sitesdefaultfiles...

  3. Jefferson Lab - Policymakers

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    900 en Construction https:www.jlab.orgconstruction

    Lab" src"sitesdefault...

  4. 2008 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Out Thu, 12182008 - 2:00pm Lab Cybersecurity Update: Critical Patch for Microsoft Internet Explorer - Requires Reboot Thu, 12182008 - 2:00pm Employee Timesheet Deadline for...

  5. 2008 - 12 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Out Thu, 12182008 - 2:00pm Lab Cybersecurity Update: Critical Patch for Microsoft Internet Explorer - Requires Reboot Thu, 12182008 - 2:00pm Employee Timesheet Deadline for...

  6. 2007 - 06 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 2007 Sun, 06242007 - 11:00pm At science, he's a natural; Retiring J-Lab leader discusses red tape and the pursuit of knowledge (Inside Business...

  7. Jefferson Lab Employee Activities

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The party was a huge success because of your help Photos With Santa Party Pictures (Login Required) This year, Jefferson Lab participated in the Wes' Wish 2015: Piles...

  8. 2007 - 10 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    dentistry solves modern crimes, unravels mysteries of Salem Witch Trials, ancient Egypt Mon, 10152007 - 12:49pm Energy Savings Deeply Rooted At Jefferson Lab Mon, 1001...

  9. 2007 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    dentistry solves modern crimes, unravels mysteries of Salem Witch Trials, ancient Egypt Mon, 10152007 - 12:49pm Energy Savings Deeply Rooted At Jefferson Lab Mon, 1001...

  10. 2007 - 06 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 2007 Tue, 06122007 - 2:00pm Innovative Energy-Saving Process Earns Jefferson Lab Team a 2007 White House Award...

  11. 2013 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Critical to Visa Renewal Process Wed, 05222013 - 10:53am Lab Sets Oct. 16 Dedication Date for Technology & Engineering Development Facility Mon, 05202013 - 10:46am...

  12. Jefferson Lab: Research Highlights

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Accelerator Public Interest Nuclear Physics Accelerator FEL Medical Imaging Engineering print version SRF Technology The JLab Ampere-Class Cryomodule SRF Cavities from...

  13. Superconductivity Centennial | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    accelerator cavities, like this one, harness the energy that the CEBAF accelerator pumps into its electron beam for nuclear physics research. SRF cavities are typically made...

  14. LabVIEW Core 2 Course | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    LabVIEW Core 2 Course The Lab is advertising a LabVIEW Core 2 course coming to Newport News. Date: Next Thursday and Friday (716, 717) from 8 to 5 at the Canon facility location,...

  15. 2010 - 12 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1:00am Laser Tricks: Making a New Color (Discovery News) Thu, 12232010 - 1:00am 10eV Photons of UV Laser Light Delivered (Photonics) Wed, 12222010 - 1:00am Laser Twinkles in...

  16. Broad Energy Spectrum of Laser-Accelerated Protons for Spallation-Related Physics P. McKenna,1,* K. W. D. Ledingham,1,

    E-Print Network [OSTI]

    Strathclyde, University of

    to the design and development of accelerator driven systems. DOI: 10.1103/PhysRevLett.94.084801 PACS numbers: 41

  17. Jefferson Lab: Research Highlights

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Pulsed Laser Deposition - Magnetic thin films Photodynamic therapy Dynamics of Impurities in Semiconductors FEL Research Highlights Pulsed Laser Deposition - Magnetic thin films...

  18. Jefferson Lab - Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    80 en Free-Electron Laser https:www.jlab.orgfree-electron-laser

  19. Laser Seeding Yields High-Power Coherent Terahertz Radiation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Laser Seeding Yields High-Power Coherent Terahertz Radiation Print Researchers at Berkeley Lab have been exploring the ways coherent synchrotron radiation (CSR) is generated in...

  20. High Power Laser Innovation Sparks Geothermal Power Potential...

    Energy Savers [EERE]

    project partner Foro Energy lab tests a high power laser tool with a patented technology that could maximize heat recovery from geothermal wells. Source: Foro Energy....

  1. High Power Laser Innovation Sparks Geothermal Power Potential...

    Broader source: Energy.gov (indexed) [DOE]

    Energy Department's project partner Foro Energy lab tests a high power laser tool with a patented technology that could maximize heat recovery from geothermal wells. Source: Foro...

  2. Microstructure-based laser-driven free-electron laser T. Plettner , R.L. Byer

    E-Print Network [OSTI]

    Byer, Robert L.

    Keywords: Dielectric-structure undulator Laser-driven particle acceleration Phase-synchronous deflection with future structure-loaded laser-driven particle accelerators. These accelerators are expected to operate-tabletop system that is based on this accelerator, a matching compact undulator is highly desirable. To this end

  3. Labs Race to Stop Iran"

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New York Times covers "National Labs Race to Stop Iran" May 15, 2015 National labs race to stop Iran Given the stakes in the sensitive negotiations with Iran, the labs would...

  4. Lab Leadership | Princeton Plasma Physics Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid you notHeat Pumps HeatTechnologies|Articles2012 2 spaceWebLabLab

  5. Generation of 9 MeV -rays by all-laser-driven Compton scattering with second-harmonic laser light

    E-Print Network [OSTI]

    Umstadter, Donald

    electron beam. Two laser pulses from the same laser system were used: one to accelerate electrons and one, these new ICS sources are driven by laser wakefield acceleration (LWFA) [3,4]. This difference has numerous with each other, by virtue of being driven by the same laser system. Several all-laser- driven approaches

  6. A Laser Range Scanner Designed for Minimum Calibration Complexity James Davis, Xing Chen

    E-Print Network [OSTI]

    Stanford University

    A Laser Range Scanner Designed for Minimum Calibration Complexity James Davis, Xing Chen Computer Graphics Lab, Stanford University {jedavis, xcchen}@graphics.stanford.edu Abstract Laser range scanners reduce the costs associated with calibration. 1 Introduction Laser triangulation scanners

  7. Core of First Section of New Accelerator Rolled Out | Jefferson...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and rolled out for further assembly. This "string" of components will become the heart of a cryomodule, which will be added to the lab's particle accelerator in 2012. Core...

  8. Jefferson Lab to Mark the End of CEBAF 6 GeV Operations on May...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    18 CEBAFAerial.jpg Jefferson Lab will officially end 6 GeV operations of the Continuous Electron Beam Accelerator Facility during a short ceremony planned for May 18 in the...

  9. Jefferson Lab Awards $14.1 Million Contract To Virginia Beach...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lab's Hall D complex, to be built as part of a 310 million upgrade to the Continuous Electron Beam Accelerator Facility. The rendering was executed by Hayes, Seay, Mattern &...

  10. Jefferson Lab to Test its Tornado Warning Siren at 10:30 a.m...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab to Test its Tornado Warning Siren at 10:30 a.m. on Friday, Dec. 4 NEWPORT NEWS, Va., Dec. 2, 2015 - The Thomas Jefferson National Accelerator Facility will conduct...

  11. Laser turns 50 (Inside Business) | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    our CD and DVD players wouldn't work." And it may be hard to believe, but CD burners did not exist until about 1994, Shinn said to illustrate how quickly the technology...

  12. Princeton Plasma Physics Lab - Laser diagnostics

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgram GuidelinesThousand CubicCubicengineeringlaser-diagnostics The

  13. Laser diagnostics | Princeton Plasma Physics Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate studentScienceLaboratoryandBryanoutreach

  14. Jefferson Lab's Distributed Data Acquisition

    SciTech Connect (OSTI)

    Trent Allison; Thomas Powers

    2006-05-01

    Jefferson Lab's Continuous Electron Beam Accelerator Facility (CEBAF) occasionally experiences fast intermittent beam instabilities that are difficult to isolate and result in downtime. The Distributed Data Acquisition (Dist DAQ) system is being developed to detect and quickly locate such instabilities. It will consist of multiple Ethernet based data acquisition chassis distributed throughout the seven-eights of a mile CEBAF site. Each chassis will monitor various control system signals that are only available locally and/or monitored by systems with small bandwidths that cannot identify fast transients. The chassis will collect data at rates up to 40 Msps in circular buffers that can be frozen and unrolled after an event trigger. These triggers will be derived from signals such as periodic timers or accelerator faults and be distributed via a custom fiber optic event trigger network. This triggering scheme will allow all the data acquisition chassis to be triggered simultaneously and provide a snapshot of relevant CEBAF control signals. The data will then be automatically analyzed for frequency content and transients to determine if and where instabilities exist.

  15. 2011 - 09 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    JLab Adopts Event Policy to Avoid Scheduling Conflicts Tue, 09132011 - 3:00pm CS Parking Lot Closed During Test Lab Exterior Painting Thu, 09012011 - 3:00pm United Way Annual...

  16. 1999 - 11 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 1999 Tue, 11161999 - 1:00am At the Frontier Lab's Electron Beam Also Aimed at Industrial Uses (Washington Bureau) Tue, 11161999 - 1:00am At the Frontier The Quirks...

  17. 1998 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Guy' features Jeff Labs (Daily Press) Wed, 05061998 - 11:00pm ARC Takes College High-Tech (William & Mary News) Mon, 05041998 - 11:00pm 18 Million Research Center is...

  18. 2011 - 02 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    20 Science Activities Night at Jefferson Lab Tue, 02082011 - 1:00pm Thomas Jefferson High School for Science & Technology Wins Feb. 5 Virginia Science Bowl; Warwick High Wins...

  19. 2009 - 06 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 2009 Mon, 06292009 - 3:00pm JLab Theory Center Director search Thu, 06252009 - 3:00pm Jefferson Lab Jackets for Staff Members Wed, 06242009 - 3:00pm JLab Personnel...

  20. 2000 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 2000 Thu, 03302000 - 1:00am Jefferson Lab Gets New Funds (Washington BureauDaily Press) Mon, 03272000 - 1:00am Practically Perfect, Prof. (Daily Press) Sat, 03182000 -...

  1. 2007 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Division Tue, 03062007 - 1:00pm Record 18 teams prepare for Virginia Regional Middle School Science Bowl on March 10 at Jefferson Lab Tue, 03062007 - 1:00pm Record 18 teams...

  2. 2006 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Standards of Learning Tests Fri, 03172006 - 1:00pm Nine teams compete in Virginia Middle School Science Bowl competition at Jefferson Lab on March 11 Fri, 03172006 - 1:00pm...

  3. 2009 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    at Jefferson Lab Mon, 03022009 - 1:00pm Media Advisory: March 7 Virginia Middle School Science Bowl Tournament Mon, 03022009 - 1:00pm JLab Guest Lecturer Discusses...

  4. 2005 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bloggers Tue, 03082005 - 6:41pm Maryland team wins VirginiaMaryland Regional Middle School Science Bowl; moves on to Nationals Mon, 03072005 - 6:44pm Jefferson Lab hosts two...

  5. 2006 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Standards of Learning Tests Fri, 03172006 - 1:00pm Nine teams compete in Virginia Middle School Science Bowl competition at Jefferson Lab on March 11 Fri, 03172006 - 1:00pm...

  6. 2008 - 02 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    February 2008 Tue, 02262008 - 1:00pm Media Advisory: March 1 Middle School Science Bowl Tournament Mon, 02252008 - 2:15pm Jefferson Lab Hosts 20 Teams for Middle School Science...

  7. 1995 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 1995 Sat, 11181995 - 1:00am Beam Up, Running at CEBAF (Daily Press) Wed, 11151995 - 1:00am Research Begins at Jefferson Lab June 1995 Thu, 06221995 - 12:00am...

  8. 2005 - 03 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 2005 Mon, 03212005 - 1:00am Hampton Roads to hop on high speed data network (The Virginian-Pilot) Sun, 03132005 - 1:00am Jefferson Lab Device Helps Breast Imaging...

  9. 2005 - 10 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 2005 Wed, 10122005 - 12:00am Egad, Einstein: Jefferson Lab lecture offers a rare look at the great man (Daily Press) Wed, 10052005 - 12:00am Investigating the Proton's...

  10. 2015 - 11 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ESH&Q Building Project Update Mon, 11232015 - 10:38am Jefferson Lab Stormwater Pollution Prevention Reminder Tue, 11102015 - 4:08pm CEBAF Center Loading Dock Area Closed...

  11. 2004 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2004 Tue, 04272004 - 12:00am A Region Better Than Advertised (Virginian-Pilot) Tue, 04202004 - 12:00am Jefferson Lab vies for expansion (Daily Press) Tue, 04202004 -...

  12. 2004 - 12 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    December 2004 Fri, 12032004 - 2:00pm Anthony Thomas accepts position of Chief Scientist and Theory Group Leader at Jefferson Lab Fri, 12032004 - 2:00pm Zooming in on a proton...

  13. 2004 - 02 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    February 2004 Tue, 02242004 - 2:00pm JLab Nuclear Theorist earns Virginia Outstanding Scientist of 2004 Award Wed, 02112004 - 2:00pm Lab Hosts 22 teams for Virginia Science...

  14. 2015 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 2015 Tue, 05192015 - 3:48pm Jefferson Lab's Annual Property Inventory Will Take Place June 1 - July 31 Tue, 05192015 - 3:01pm JLab Implements Process to Improve Public...

  15. 2012 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    JLab Celebrates 6 GeV End of an Era on June 6 Thu, 05312012 - 3:00pm Cigarette Butt Causes Fire Outside of CEBAF Center Wed, 05232012 - 3:00pm Jefferson Lab Unveils New...

  16. 2001 - 11 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 2001 Sat, 11172001 - 1:00am Jefferson Lab Gets New Chief: Leemann takes top post (Times-Dispatch) Sat, 11172001 - 1:00am Leemann Officially Takes Over Peninsula's...

  17. 2001 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 2001 Fri, 11162001 - 2:00pm Christoph W. Leemann Named Jefferson Lab Director August 2001 Tue, 08142001 - 2:00pm DOE Announces First Awards in Scientific Discovery...

  18. Policymakers | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab's 25th Anniversary celebration. A D D I T I O N A L L I N K S: Brochures Information Sheets At A Glance 12 GeV Upgrade Strategic Plan Economic Impact top-right...

  19. 2009 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Status After Severe Weather Thu, 12172009 - 3:00pm End-of-Year Dosimeter (Radiation Badge) Change-Out Wed, 12162009 - 3:00pm 2009 Holiday Shutdown Schedule...

  20. 2009 - 12 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab Status After Severe Weather Thu, 12172009 - 3:00pm End-of-Year Dosimeter (Radiation Badge) Change-Out Wed, 12162009 - 3:00pm 2009 Holiday Shutdown Schedule...

  1. Open House | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Site Map and Tour Stops map OHapp Scan or download the Jefferson Lab Open House App (Android Only) and have event information on hand ready to go. Driving and Parking Directions...

  2. 2015 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 2015 Thu, 10152015 - 7:53pm Nuclear Science Advisory Committee Issues Plan for U.S. Nuclear Physics Research September 2015 Wed, 09302015 - 8:28am Jefferson Lab to Test...

  3. 2010 - 12 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lab, Bldg.59 CLOSED For Holiday Shutdown Tue, 12212010 - 3:00pm Information on DOE Salary Freeze Tue, 12212010 - 3:00pm JLab Power Outage, Main Entrance Closed Over Shutdown...

  4. 2010 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lab, Bldg.59 CLOSED For Holiday Shutdown Tue, 12212010 - 3:00pm Information on DOE Salary Freeze Tue, 12212010 - 3:00pm JLab Power Outage, Main Entrance Closed Over Shutdown...

  5. 2012 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2012 Thu, 04262012 - 1:00pm Boron-Nitride Nanotubes Show Potential in Cancer Treatment Fri, 04202012 - 1:00pm Jefferson Lab Plans Open House for May 19...

  6. 2001 - 07 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    July 2001 Sun, 07222001 - 11:00pm Lab is Part of Project to Build Neutron Generator (The Virginian-Pilot) Sat, 07142001 - 11:00pm Interests and Advantages: High School, College...

  7. 2009 - 04 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 2009 Sun, 04192009 - 11:00pm Painting firm honored by Jefferson Lab (Daily Press) Sun, 04192009 - 11:00pm Hampton University awarded 1.3 million for breast cancer...

  8. 1998 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 1998 Sun, 11011998 - 12:00pm Draayer Elected as New SURA President October 1998 Thu, 10011998 - 12:00pm Jefferson Lab invites public to free lecture by author of...

  9. 2011 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 2011 Wed, 05112011 - 10:31am Two Jefferson Lab Scientists Win Prestigious Early Career Awards April 2011 Fri, 04082011 - 10:07am Superconductivity Centennial Wed, 0406...

  10. 2003 - 10 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    October 2003 Wed, 10082003 - 12:00am Russian and 2 Americans Win Nobel Prize Physics Honors (The New York Times) Tue, 10072003 - 12:00am Jefferson Lab announces Oct. 7 Fall...

  11. 2011 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    time to Japanese physicists Wed, 05112011 - 2:00pm Two Jefferson Lab Scientists Win Prestigious Early Career Awards April 2011 Tue, 04262011 - 2:00pm Harris Power Earns...

  12. Busy Week | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    a few weeks ago, we went with a tour. We visited the Test Lab Addition, Hall A and the FEL. He was very interested and voiced his praise for what we do. Short but sweet, and I am...

  13. 1999 - 06 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 1999 Sun, 06271999 - 12:00am Gizmos, Gadgets & Devices - Oh, My (Daily Press) Fri, 06251999 - 12:00am Exhibit: High-Energy Lab Tours for Kids (Daily Press) Tue, 06221999...

  14. 2014 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Center A Wing Restrooms to Open on Thursday, Sept. 4; C Wing Restrooms to Close for Refurbishment Wed, 09032014 - 10:46pm Lab Employee Survey - Assistance Requested Tue, 0902...

  15. 2013 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    December 2013 Mon, 12092013 - 10:15am Newly Invented Shielding For Stopping Neutrons Cold Thu, 12052013 - 3:59pm Jefferson Lab to Conduct Test of its Tornado Warning Siren at...

  16. 2002 - 11 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2002 Fri, 11152002 - 12:00am Illuminating idea: Lab's T-light work may have uses in medicine, security (Daily Press) Thu, 11142002 - 12:00am Power from Terahertz Beams...

  17. Facilities | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    JLab Buildings Facilities Management & Logistics is responsible for performing or specifying performance of all Jefferson Lab facility maintenance. A D D I T I O N A L L I N K S:...

  18. Jefferson Lab: Research Highlights

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Heats Up Is It or Isn't It? Pentaquark Debate Heats Up Jefferson Lab Medical Imager Spots Breast Cancer Effective Model of the Atom Gets More Realistic JLab Completes 100th...

  19. 2000 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cancer-seeking Camera Demystifies Research Lab (Daily Press) Sat, 10072000 - 11:00pm Breast Cancer Biopsies Could Be Things of Past (Daily Press) Sat, 10072000 - 11:00pm...

  20. 2013 - 09 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cleanup Sept. 30 - Oct. 4 Wed, 09112013 - 11:14am Lab Community Invited to Oct. 16 Dedication of Technology & Engineering Development Facility Fri, 09062013 - 1:00pm TIAA-CREF...

  1. Geological Hazards Labs Spring 2010

    E-Print Network [OSTI]

    Chen, Po

    Geological Hazards Labs Spring 2010 TA: En-Jui Lee (http://www.gg.uwyo.edu/ggstudent/elee8/site - An Indispensible Tool in Hazard Planning 3 26/1; 27/1 Lab 2: Geologic Maps - Mapping the Hazards 4 2/2; 3/2 Lab 3: Population - People at Risk 5 9/2; 10/2 Lab 4: Plate Tectonics - Locating Geologic Hazards 6 16/2; 17/2 Lab 5

  2. Grad student aims to improve particle accelerators > EMC2 News...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    is a negatively charged electrode, that when hit with a laser light source, causes electrons to become excited and emitted from the electrode. The electrons are then accelerated...

  3. 43 PARTICLE ACCELERATORS; ELECTRON GUNS; BEAM EMITTANCE; CHARGE

    Office of Scientific and Technical Information (OSTI)

    SPACE 430200* -- Particle Accelerators-- Beam Dynamics, Field Calculations, & Ion Optics The evolution of the electron-beam phase space distribution in laser-driven rf guns is...

  4. 2 photon Laser optical path (Will Grimes June 3, 2013) (page 1 of 10) polarized mirror

    E-Print Network [OSTI]

    Stryker, Michael

    bottom periscope mirror periscope (Thor labs RS99) into microscope scan head #12;2 photon Laser in front of the beam. bottom periscope mirror periscope (Thor labs RS99) into microscope scan head beam

  5. Generation and pointing stabilization of multi-GeV electron beams from a laser plasma accelerator driven in a pre-formed plasma waveguide

    SciTech Connect (OSTI)

    Gonsalves, A. J.; Nakamura, K.; Daniels, J.; Mao, H.-S.; Benedetti, C.; Schroeder, C. B.; Tóth, Cs.; Tilborg, J. van; Vay, J.-L.; Geddes, C. G. R.; Esarey, E.; Mittelberger, D. E.; Bulanov, S. S.; Leemans, W. P.

    2015-05-15

    Laser pulses with peak power 0.3?PW were used to generate electron beams with energy >4?GeV within a 9?cm-long capillary discharge waveguide operated with a plasma density of ?7×10{sup 17}?cm{sup ?3}. Simulations showed that the super-Gaussian near-field laser profile that is typical of high-power femtosecond laser systems reduces the efficacy of guiding in parabolic plasma channels compared with the Gaussian laser pulses that are typically simulated. In the experiments, this was mitigated by increasing the plasma density and hence the contribution of self-guiding. This allowed for the generation of multi-GeV electron beams, but these had angular fluctuation ?2?mrad rms. Mitigation of capillary damage and more accurate alignment allowed for stable beams to be produced with energy 2.7±0.1?GeV. The pointing fluctuation was 0.6?mrad rms, which was less than the beam divergence of ?1?mrad full-width-half-maximum.

  6. Energy Savings Deeply Rooted At Jefferson Lab | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab has given a new meaning to dirt cheap. The lab uses a geothermal well system to control heating and cooling on two floors of one wing of its main administrative...

  7. The 6 GeV TMD Program at Jefferson Lab

    SciTech Connect (OSTI)

    Puckett, Andrew J.

    2015-01-01

    The study of the transverse momentum dependent parton distributions (TMDs) of the nucleon in semi-inclusive deep-inelastic scattering (SIDIS) has emerged as one of the major physics motivations driving the experimental program using the upgraded 11 GeV electron beam at Jefferson Lab’s Continuous Electron Beam Accelerator Facility (CEBAF). The accelerator construction phase of the CEBAF upgrade is essentially complete and commissioning of the accelerator has begun as of April, 2014. As the new era of CEBAF operations begins, it is appropriate to review the body of published and forthcoming results on TMDs from the 6 GeV era of CEBAF operations, discuss what has been learned, and discuss the key challenges and opportunities for the 11 GeV SIDIS program of CEBAF.

  8. Market Acceleration

    SciTech Connect (OSTI)

    Solar Energy Technologies Program

    2010-09-28

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its market acceleration subprogram.

  9. TechLab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar Fuel ProductionRecoverable UserTeacherTechLab TechLab

  10. Lab celebrates Earth Day

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResource andfirstDeviceLab captures five SocietyLab

  11. Lab grants Decision Sciences

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResource andfirstDeviceLab captures fiveLab

  12. 252 IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 24, NO. 2, APRIL 1996 Overview of Plasma-Based Accelerator Concepts

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    , and wakefield accelerators driven by multiple electron or laser pulses. Basic properties of linear and nonlinear laser systems based on the technique of chirped-pulse amplification [lo]-[ 171. Electron acceleration

  13. Directors | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Laboratory in Great Britain. In 1978, he became a staff member at CERN in Geneva, Switzerland, where he remained until joining the staff at Fermi National Accelerator Laboratory...

  14. 1996 - 05 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the Fundamental Structure of Matter (Release) Fri, 05241996 - 12:00am Secretary O'Leary Dedicates Thomas Jefferson National Accelerator Facility (Release) Wed, 05081996 -...

  15. Jefferson Lab: Research Highlights

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Archive print version Archive Nuclear Physics Accelerator FEL Medical Imaging 12000 Jefferson Avenue, Newport News, VA 23606 Phone: (757) 269-7100 Fax: (757) 269-7363 contact...

  16. User Information | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PAC Three-Year Accelerator Schedule Students Advisors top-right bottom-left-corner bottom-right-corner Users: Scientists, Students & Postdocs New User Checklist us citizen...

  17. Vehicle Systems Integration Laboratory Accelerates Powertrain Development

    ScienceCinema (OSTI)

    None

    2014-06-25

    ORNL's Vehicle Systems Integration (VSI) Laboratory accelerates the pace of powertrain development by performing prototype research and characterization of advanced systems and hardware components. The VSI Lab is capable of accommodating a range of platforms from advanced light-duty vehicles to hybridized Class 8 powertrains with the goals of improving overall system efficiency and reducing emissions.

  18. Vehicle Systems Integration Laboratory Accelerates Powertrain Development

    SciTech Connect (OSTI)

    None

    2014-04-15

    ORNL's Vehicle Systems Integration (VSI) Laboratory accelerates the pace of powertrain development by performing prototype research and characterization of advanced systems and hardware components. The VSI Lab is capable of accommodating a range of platforms from advanced light-duty vehicles to hybridized Class 8 powertrains with the goals of improving overall system efficiency and reducing emissions.

  19. Earth Week 2008 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jefferson Lab has given new meaning to dirt cheap. The lab uses a geothermal well system to control heating and cooling on two floors of one wing of its main administrative...

  20. Industrial Green | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Laser that retains sulfur hexafluoride gas when it isn't being used in the FEL's gun test stand. The concept received a 2011 Virginia Governor's Environmental Excellence...