National Library of Energy BETA

Sample records for high energy accelerators

  1. HIGH ENERGY PARTICLE ACCELERATOR

    DOE Patents [OSTI]

    Courant, E.D.; Livingston, M.S.; Snyder, H.S.

    1959-04-14

    An improved apparatus is presented for focusing charged particles in an accelerator. In essence, the invention includes means for establishing a magnetic field in discrete sectors along the path of moving charged particles, the magnetic field varying in each sector in accordance with the relation. B = B/ sub 0/ STAln (r-r/sub 0/)/r/sub 0/!, where B/sub 0/ is the value of the magnetic field at the equilibrium orbit of radius r/sub 0/ of the path of the particles, B equals the magnetic field at the radius r of the chamber and n equals the magnetic field gradient index, the polarity of n being abruptly reversed a plurality of times as the particles travel along their arcuate path. With this arrangement, the particles are alternately converged towards the axis of their equillbrium orbit and diverged therefrom in successive sectors with a resultant focusing effect.

  2. ACCELERATING POLARIZED PROTONS TO HIGH ENERGY.

    SciTech Connect (OSTI)

    BAI, M.; AHRENS, L.; ALEKSEEV, I.G.; ALESSI, J.; BEEBE-WANG, J.; BLASKIEWICZ, M.; BRAVAR, A.; BRENNAN, J.M.; BRUNO, D.; BUNCE, G.; ET AL.

    2006-10-02

    The Relativistic Heavy Ion Collider (RHIC) is designed to provide collisions of high energy polarized protons for the quest of understanding the proton spin structure. Polarized proton collisions at a beam energy of 100 GeV have been achieved in RHIC since 2001. Recently, polarized proton beam was accelerated to 250 GeV in RHIC for the first time. Unlike accelerating unpolarized protons, the challenge for achieving high energy polarized protons is to fight the various mechanisms in an accelerator that can lead to partial or total polarization loss due to the interaction of the spin vector with the magnetic fields. We report on the progress of the RHIC polarized proton program. We also present the strategies of how to preserve the polarization through the entire acceleration chain, i.e. a 200 MeV linear accelerator, the Booster, the AGS and RHIC.

  3. Accelerating Polarized Protons to High Energy

    SciTech Connect (OSTI)

    Bai, M.; Ahrens, L.; Alekseev, I. G.; Alessi, J.; Beebe-Wang, J.; Blaskiewicz, M.; Bravar, A.; Brennan, J. M.; Bruno, D.; Bunce, G.; Butler, J.; Cameron, P.; Connolly, R.; Delong, J.; D'Ottavio, T.; Drees, A.; Fischer, W.; Ganetis, G.; Gardner, C.; Glenn, J.

    2007-06-13

    The Relativistic Heavy Ion Collider (RHIC) is designed to provide collisions of high energy polarized protons for the quest of understanding the proton spin structure. Polarized proton collisions at a beam energy of 100 GeV have been achieved in RHIC since 2001. Recently, polarized proton beam was accelerated to 250 GeV in RHIC for the first time. Unlike accelerating unpolarized protons, the challenge for achieving high energy polarized protons is to fight the various mechanisms in an accelerator that can lead to partial or total polarization loss due to the interaction of the spin vector with the magnetic fields. We report on the progress of the RHIC polarized proton program. We also present the strategies of how to preserve the polarization through the entire acceleration chain, i.e. a 200 MeV linear accelerator, the Booster, the AGS and RHIC.

  4. Use of Oriented Crystals at High-Energy Accelerators

    SciTech Connect (OSTI)

    Kotov, V.I.; Afonin, A.G.; Baranov, V.T.; Biryukov, V.M.; Ivanov, Yu.M.; Kardash, A.A.; Maisheev, V.A.; Terekhov, V.I.; Troyanov, E.F.; Fedotov, Yu.S.; Chepegin, V.N.; Chesnokov, Yu.A.

    2005-06-01

    The application of bent crystals for extracting accelerated beams from high-energy accelerators is reviewed. The results of realizing highly efficient extraction of protons from the IHEP accelerator are presented. Proposals on using oriented crystals for designing efficient positron sources at linear colliders and on developing new undulators are discussed.

  5. High-energy accelerator for beams of heavy ions

    DOE Patents [OSTI]

    Martin, Ronald L.; Arnold, Richard C.

    1978-01-01

    An apparatus for accelerating heavy ions to high energies and directing the accelerated ions at a target comprises a source of singly ionized heavy ions of an element or compound of greater than 100 atomic mass units, means for accelerating the heavy ions, a storage ring for accumulating the accelerated heavy ions and switching means for switching the heavy ions from the storage ring to strike a target substantially simultaneously from a plurality of directions. In a particular embodiment the heavy ion that is accelerated is singly ionized hydrogen iodide. After acceleration, if the beam is of molecular ions, the ions are dissociated to leave an accelerated singly ionized atomic ion in a beam. Extraction of the beam may be accomplished by stripping all the electrons from the atomic ion to switch the beam from the storage ring by bending it in magnetic field of the storage ring.

  6. Future Accelerator Challenges in Support of High-Energy Physics

    SciTech Connect (OSTI)

    Zisman, Michael S.; Zisman, M.S.

    2008-05-03

    Historically, progress in high-energy physics has largely been determined by development of more capable particle accelerators. This trend continues today with the imminent commissioning of the Large Hadron Collider at CERN, and the worldwide development effort toward the International Linear Collider. Looking ahead, there are two scientific areas ripe for further exploration--the energy frontier and the precision frontier. To explore the energy frontier, two approaches toward multi-TeV beams are being studied, an electron-positron linear collider based on a novel two-beam powering system (CLIC), and a Muon Collider. Work on the precision frontier involves accelerators with very high intensity, including a Super-BFactory and a muon-based Neutrino Factory. Without question, one of the most promising approaches is the development of muon-beam accelerators. Such machines have very high scientific potential, and would substantially advance the state-of-the-art in accelerator design. The challenges of the new generation of accelerators, and how these can be accommodated in the accelerator design, are described. To reap their scientific benefits, all of these frontier accelerators will require sophisticated instrumentation to characterize the beam and control it with unprecedented precision.

  7. Reinventing the Accelerator for the High Energy Frontier

    ScienceCinema (OSTI)

    Rosenzweig, James [UCLA, Los Angeles, California, United States

    2009-09-01

    The history of discovery in high-energy physics has been intimately connected with progress in methods of accelerating particles for the past 75 years. This remains true today, as the post-LHC era in particle physics will require significant innovation and investment in a superconducting linear collider. The choice of the linear collider as the next-generation discovery machine, and the selection of superconducting technology has rather suddenly thrown promising competing techniques -- such as very large hadron colliders, muon colliders, and high-field, high frequency linear colliders -- into the background. We discuss the state of such conventional options, and the likelihood of their eventual success. We then follow with a much longer view: a survey of a new, burgeoning frontier in high energy accelerators, where intense lasers, charged particle beams, and plasmas are all combined in a cross-disciplinary effort to reinvent the accelerator from its fundamental principles on up.

  8. Accelerating Electrolyte Discovery for Energy Storage with High Throughput

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

    Screening - Joint Center for Energy Storage Research December 26, 2014, Research Highlights Accelerating Electrolyte Discovery for Energy Storage with High Throughput Screening A screening scheme has been developed to down-select molecule candidates based on successive property evaluations obtained from high-throughput computations. Here we show the down-select results for ~1400 candidates for non-aqueous redox flow battery application. Scientific Achievement We have developed a strategy to

  9. ACCELERATE ENERGY

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

    Obama, State of the Union, Feb. 13, 2013 The U.S. Department of Energy, Council on Competitiveness and Alliance to Save Energy have joined forces to undertake in Accelerate Energy...

  10. 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

  11. Transmutation and energy-production with high power accelerators

    SciTech Connect (OSTI)

    Lawrence, G.P.

    1995-07-01

    Accelerator-driven transmutation offers attractive new solutions to complex nuclear problems. This paper outlines the basics of the technology, summarizes the key application areas, and discusses designs of and performance issues for the high-power proton accelerators that are required.

  12. High Performance Computing Modeling Advances Accelerator Science for High-Energy Physics

    SciTech Connect (OSTI)

    Amundson, James; Macridin, Alexandru; Spentzouris, Panagiotis

    2014-07-28

    The development and optimization of particle accelerators are essential for advancing our understanding of the properties of matter, energy, space, and time. Particle accelerators are complex devices whose behavior involves many physical effects on multiple scales. Therefore, advanced computational tools utilizing high-performance computing are essential for accurately modeling them. In the past decade, the US Department of Energy's SciDAC program has produced accelerator-modeling tools that have been employed to tackle some of the most difficult accelerator science problems. The authors discuss the Synergia framework and its applications to high-intensity particle accelerator physics. Synergia is an accelerator simulation package capable of handling the entire spectrum of beam dynamics simulations. Our authors present Synergia's design principles and its performance on HPC platforms.

  13. High Performance Computing Modeling Advances Accelerator Science for High-Energy Physics

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

    Amundson, James; Macridin, Alexandru; Spentzouris, Panagiotis

    2014-07-28

    The development and optimization of particle accelerators are essential for advancing our understanding of the properties of matter, energy, space, and time. Particle accelerators are complex devices whose behavior involves many physical effects on multiple scales. Therefore, advanced computational tools utilizing high-performance computing are essential for accurately modeling them. In the past decade, the US Department of Energy's SciDAC program has produced accelerator-modeling tools that have been employed to tackle some of the most difficult accelerator science problems. The authors discuss the Synergia framework and its applications to high-intensity particle accelerator physics. Synergia is an accelerator simulation package capable ofmore » handling the entire spectrum of beam dynamics simulations. Our authors present Synergia's design principles and its performance on HPC platforms.« less

  14. High-Performance Computing Modeling Advances Accelerator Science for High-Energy Physics

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

    Amundson, James; Macridin, Alexandru; Spentzouris, Panagiotis

    2014-11-01

    The development and optimization of particle accelerators are essential for advancing our understanding of the properties of matter, energy, space and time. Particle accelerators are complex devices whose behavior involves many physical effects on multiple scales. Therefore, advanced computational tools utilizing high-performance computing (HPC) are essential for accurately modeling them. In the past decade, the DOE SciDAC program has produced such accelerator-modeling tools, which have beem employed to tackle some of the most difficult accelerator science problems. In this article we discuss the Synergia beam-dynamics framework and its applications to high-intensity particle accelerator physics. Synergia is an accelerator simulation packagemorecapable of handling the entire spectrum of beam dynamics simulations. We present the design principles, key physical and numerical models in Synergia and its performance on HPC platforms. Finally, we present the results of Synergia applications for the Fermilab proton source upgrade, known as the Proton Improvement Plan (PIP).less

  15. High-Performance Computing Modeling Advances Accelerator Science for High-Energy Physics

    SciTech Connect (OSTI)

    Amundson, James; Macridin, Alexandru; Spentzouris, Panagiotis

    2014-11-01

    The development and optimization of particle accelerators are essential for advancing our understanding of the properties of matter, energy, space and time. Particle accelerators are complex devices whose behavior involves many physical effects on multiple scales. Therefore, advanced computational tools utilizing high-performance computing (HPC) are essential for accurately modeling them. In the past decade, the DOE SciDAC program has produced such accelerator-modeling tools, which have beem employed to tackle some of the most difficult accelerator science problems. In this article we discuss the Synergia beam-dynamics framework and its applications to high-intensity particle accelerator physics. Synergia is an accelerator simulation package capable of handling the entire spectrum of beam dynamics simulations. We present the design principles, key physical and numerical models in Synergia and its performance on HPC platforms. Finally, we present the results of Synergia applications for the Fermilab proton source upgrade, known as the Proton Improvement Plan (PIP).

  16. High-energy physics detector MicroBooNE sees first accelerator-born

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

    neutrinos MicroBooNE sees first accelerator-born neutrinos High-energy physics detector MicroBooNE sees first accelerator-born neutrinos The principal purpose of the detector is to confirm or deny the existence of a hypothetical particle known as the sterile neutrino. November 2, 2015 An accelerator-born neutrino candidate, spotted with the MicroBooNE detector. Image courtesy Fermilab. An accelerator-born neutrino candidate, spotted with the MicroBooNE detector. Image courtesy Fermilab.

  17. Neutron dose per fluence and weighting factors for use at high energy accelerators

    SciTech Connect (OSTI)

    Cossairt, J.Donald; Vaziri, Kamran; /Fermilab

    2008-07-01

    In June 2007, the United States Department of Energy incorporated revised values of neutron weighting factors into its occupational radiation protection Regulation 10 CFR Part 835 as part of updating its radiation dosimetry system. This has led to a reassessment of neutron radiation fields at high energy proton accelerators such as those at the Fermi National Accelerator Laboratory (Fermilab). Values of dose per fluence factors appropriate for accelerator radiation fields calculated elsewhere are collated and radiation weighting factors compared. The results of this revision to the dosimetric system are applied to americium-beryllium neutron energy spectra commonly used for instrument calibrations. A set of typical accelerator neutron energy spectra previously measured at Fermilab are reassessed in light of the new dosimetry system. The implications of this revision are found to be of moderate significance.

  18. Beam manipulation techniques, nonlinear beam dynamics, and space charge effect in high energy high power accelerators

    SciTech Connect (OSTI)

    Lee, S. Y.

    2014-04-07

    We had carried out a design of an ultimate storage ring with beam emittance less than 10 picometer for the feasibility of coherent light source at X-ray wavelength. The accelerator has an inherent small dynamic aperture. We study method to improve the dynamic aperture and collective instability for an ultimate storage ring. Beam measurement and accelerator modeling are an integral part of accelerator physics. We develop the independent component analysis (ICA) and the orbit response matrix method for improving accelerator reliability and performance. In collaboration with scientists in National Laboratories, we also carry out experimental and theoretical studies on beam dynamics. Our proposed research topics are relevant to nuclear and particle physics using high brightness particle and photon beams.

  19. Accelerator physics and technology challenges of very high energy hadron colliders

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

    Shiltsev, Vladimir D.

    2015-08-20

    High energy hadron colliders have been in the forefront of particle physics for more than three decades. At present, international particle physics community considers several options for a 100 TeV proton–proton collider as a possible post-LHC energy frontier facility. The method of colliding beams has not fully exhausted its potential but has slowed down considerably in its progress. This article briefly reviews the accelerator physics and technology challenges of the future very high energy colliders and outlines the areas of required research and development towards their technical and financial feasibility.

  20. High field gradient particle accelerator

    DOE Patents [OSTI]

    Nation, J.A.; Greenwald, S.

    1989-05-30

    A high electric field gradient electron accelerator utilizing short duration, microwave radiation, and capable of operating at high field gradients for high energy physics applications or at reduced electric field gradients for high average current intermediate energy accelerator applications is disclosed. Particles are accelerated in a smooth bore, periodic undulating waveguide, wherein the period is so selected that the particles slip an integral number of cycles of the r.f. wave every period of the structure. This phase step of the particles produces substantially continuous acceleration in a traveling wave without transverse magnetic or other guide means for the particle. 10 figs.

  1. High field gradient particle accelerator

    DOE Patents [OSTI]

    Nation, John A.; Greenwald, Shlomo

    1989-01-01

    A high electric field gradient electron accelerator utilizing short duration, microwave radiation, and capable of operating at high field gradients for high energy physics applications or at reduced electric field gradients for high average current intermediate energy accelerator applications. Particles are accelerated in a smooth bore, periodic undulating waveguide, wherein the period is so selected that the particles slip an integral number of cycles of the r.f. wave every period of the structure. This phase step of the particles produces substantially continuous acceleration in a traveling wave without transverse magnetic or other guide means for the particle.

  2. The coherent acceleration of ultra high energy cosmic rays and the galactic dynamo

    SciTech Connect (OSTI)

    Colgate, S.A.

    1995-05-01

    In order to accelerate cosmic rays to ultra high energy, >10{sup 18} ev, requires that the step size in energy in a diffusive process be very much larger than occurs in galactic or extra galactic hydrodynamic mechanisms where {Delta}E/F {approximately} v/c{approximately}1/300 per step. This step size requires >10{sup 5} scatterings per doubling in energy (the shock mechanism) and therefore <10{sup {minus}5} energy loss per scattering. Coherent acceleration (CA), on the other hand, is proposed in which the energy gained, {Delta}E per particle in the CA region is very much larger so that only one or several scatterings are required to reach the final energy. The power law spectrum is created by the probability of loss from the CA region where this probability is inversely proportional to the particle`s rigidity, E. Therefore the fractional loss in number per fractional gain in energy, dN/N {approximately} {minus}{Gamma} dE/E, results in a power law spectrum. CA depends upon the electric field, E = {eta}J, J, the current density, in a force free field, where magnetic helicity, J={alpha}B, arises universally in all evolving mass condensations due to twisting of magnetic flux by the large number of turns before pressure support. The acceleration process is E*v, where universe beam instabilities enhance {eta} leading to phased coherent acceleration (PCA). The result of the energy transfer from field energy to matter energy is the relaxation of the field helicity, or reconnection but with J{parallel}B rather than J{perpendicular}B.

  3. High intensity electron cyclotron resonance proton source for low energy high intensity proton accelerator

    SciTech Connect (OSTI)

    Roychowdhury, P.; Chakravarthy, D. P.

    2009-12-15

    Electron cyclotron resonance (ECR) proton source at 50 keV, 50 mA has been designed, developed, and commissioned for the low energy high intensity proton accelerator (LEHIPA). Plasma characterization of this source has been performed. ECR plasma was generated with 400-1100 W of microwave power at 2.45 GHz, with hydrogen as working gas. Microwave was fed in the plasma chamber through quartz window. Plasma density and temperature was studied under various operating conditions, such as microwave power and gas pressure. Langmuir probe was used for plasma characterization using current voltage variation. The typical hydrogen plasma density and electron temperature measured were 7x10{sup 11} cm{sup -3} and 6 eV, respectively. The total ion beam current of 42 mA was extracted, with three-electrode extraction geometry, at 40 keV of beam energy. The extracted ion current was studied as a function of microwave power and gas pressure. Depending on source pressure and discharge power, more than 30% total gas efficiency was achieved. The optimization of the source is under progress to meet the requirement of long time operation. The source will be used as an injector for continuous wave radio frequency quadrupole, a part of 20 MeV LEHIPA. The required rms normalized emittance of this source is less than 0.2 {pi} mm mrad. The simulated value of normalized emittance is well within this limit and will be measured shortly. This paper presents the study of plasma parameters, first beam results, and the status of ECR proton source.

  4. High brightness electron accelerator

    DOE Patents [OSTI]

    Sheffield, Richard L.; Carlsten, Bruce E.; Young, Lloyd M.

    1994-01-01

    A compact high brightness linear accelerator is provided for use, e.g., in a free electron laser. The accelerator has a first plurality of acclerating cavities having end walls with four coupling slots for accelerating electrons to high velocities in the absence of quadrupole fields. A second plurality of cavities receives the high velocity electrons for further acceleration, where each of the second cavities has end walls with two coupling slots for acceleration in the absence of dipole fields. The accelerator also includes a first cavity with an extended length to provide for phase matching the electron beam along the accelerating cavities. A solenoid is provided about the photocathode that emits the electons, where the solenoid is configured to provide a substantially uniform magnetic field over the photocathode surface to minimize emittance of the electons as the electrons enter the first cavity.

  5. SU-E-T-543: Measurement of Neutron Activation From Different High Energy Varian Linear Accelerators

    SciTech Connect (OSTI)

    Thatcher, T; Madsen, S; Sudowe, R; Meigooni, A Soleimani

    2015-06-15

    Purpose: Linear accelerators producing photons above 10 MeV may induce photonuclear reactions in high Z components of the accelerator. These liberated neutrons can then activate the structural components of the accelerator and other materials in the beam path through neutron capture reactions. The induced activity within the accelerator may contribute to additional dose to both patients and personnel. This project seeks to determine the total activity and activity per activated isotope following irradiation in different Varian accelerators at energies above 10 MeV. Methods: A Varian 21IX accelerator was used to irradiate a 30 cm × 30 cm × 20 cm solid water phantom with 15 MV x-rays. The phantom was placed at an SSD of 100 cm and at the center of a 20 cm × 20 cm field. Activation induced gamma spectra were acquired over a 5 minute interval after 1 and 15 minutes from completion of the irradiation. All measurements were made using a CANBERRA Falcon 5000 Portable HPGe detector. The majority of measurements were made in scattering geometry with the detector situated at 90° to the incident beam, 30 cm from the side of the phantom and approximately 10 cm from the top. A 5 minute background count was acquired and automatically subtracted from all subsequent measurements. Photon spectra were acquired for both open and MLC fields. Results: Based on spectral signatures, nuclides have been identified and their activities calculated for both open and MLC fields. Preliminary analyses suggest that activities from the activation products in the microcurie range. Conclusion: Activation isotopes have been identified and their relative activities determined. These activities are only gross estimates since efficiencies have not been determined for this source-detector geometry. Current efforts are focused on accurate determination of detector efficiencies using Monte Carlo calculations.

  6. 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.

  7. How Particle Accelerators Work | Department of Energy

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

    Particle Accelerators Work How Particle Accelerators Work June 18, 2014 - 4:11pm Addthis Infographic by <a href="/node/379579">Sarah Gerrity</a>, Energy Department. Infographic by Sarah Gerrity, Energy Department. Ben Dotson Ben Dotson Former Project Coordinator for Digital Reform, Office of Public Affairs What are the key facts? A particle accelerator is a machine that accelerates elementary particles, such as electrons or protons, to very high energies. Whether it's

  8. Accelerate Energy Productivity 2030 Launch

    Broader source: Energy.gov [DOE]

    Today, the Department of Energy kicked off Accelerate Energy Productivity 2030. This initiative supports President Obama’s goal to double our energy productivity by 2030.

  9. HIGH GRADIENT INDUCTION ACCELERATOR

    SciTech Connect (OSTI)

    Caporaso, G J; Sampayan, S; Chen, Y; Blackfield, D; Harris, J; Hawkins, S; Holmes, C; Krogh, M; Nelson, S; Nunnally, W; Paul, A; Poole, B; Rhodes, M; Sanders, D; Selenes, K; Sullivan, J; Wang, L; Watson, J

    2007-06-21

    A new type of compact induction accelerator is under development at the Lawrence Livermore National Laboratory that promises to increase the average accelerating gradient by at least an order of magnitude over that of existing induction machines. The machine is based on the use of high gradient vacuum insulators, advanced dielectric materials and switches and is stimulated by the desire for compact flash x-ray radiography sources. Research describing an extreme variant of this technology aimed at proton therapy for cancer will be described. Progress in applying this technology to several applications will be reviewed.

  10. High Performance Outdoor Lighting Accelerator

    Broader source: Energy.gov [DOE]

    Hosted by the U.S. Department of Energy (DOE)’s Weatherization and Intergovernmental Programs Office (WIPO), this webinar covered the expansion of the Better Buildings platform to include the newest initiative for the public sector: the High Performance Outdoor Lighting Accelerator (HPOLA).

  11. High energy physics advisory panel`s composite subpanel for the assessment of the status of accelerator physics and technology

    SciTech Connect (OSTI)

    1996-05-01

    In November 1994, Dr. Martha Krebs, Director of the US Department of Energy (DOE) Office of Energy Research (OER), initiated a broad assessment of the current status and promise of the field of accelerator physics and technology with respect to five OER programs -- High Energy Physics, Nuclear Physics, Basic Energy Sciences, Fusion Energy, and Health and Environmental Research. Dr. Krebs asked the High Energy Physics Advisory Panel (HEPAP) to establish a composite subpanel with representation from the five OER advisory committees and with a balance of membership drawn broadly from both the accelerator community and from those scientific disciplines associated with the OER programs. The Subpanel was also charged to provide recommendations and guidance on appropriate future research and development needs, management issues, and funding requirements. The Subpanel finds that accelerator science and technology is a vital and intellectually exciting field. It has provided essential capabilities for the DOE/OER research programs with an enormous impact on the nation`s scientific research, and it has significantly enhanced the nation`s biomedical and industrial capabilities. Further progress in this field promises to open new possibilities for the scientific goals of the OER programs and to further benefit the nation. Sustained support of forefront accelerator research and development by the DOE`s OER programs and the DOE`s predecessor agencies has been responsible for much of this impact on research. This report documents these contributions to the DOE energy research mission and to the nation.

  12. Home Energy Information Accelerator | Department of Energy

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

    Information Accelerator Home Energy Information Accelerator Lead Performer: U.S. Department of Energy - Washington, D.C. Funding Type: Direct Funded Program Website: http://www1.eere.energy.gov/buildings/betterbuildings/accelerators/energ... PROJECT OBJECTIVE The U.S. Department of Energy (DOE) is expanding the Better Buildings initiative to engage leaders in a set of Better Buildings Accelerators. These accelerators are designed to demonstrate specific innovative policies and approaches, which

  13. High energy gain in three-dimensional simulations of light sail acceleration

    SciTech Connect (OSTI)

    Sgattoni, A.; Sinigardi, S.; Macchi, A.

    2014-08-25

    The dynamics of radiation pressure acceleration in the relativistic light sail regime are analysed by means of large scale, three-dimensional (3D) particle-in-cell simulations. Differently to other mechanisms, the 3D dynamics leads to faster and higher energy gain than in 1D or 2D geometry. This effect is caused by the local decrease of the target density due to transverse expansion leading to a “lighter sail.” However, the rarefaction of the target leads to an earlier transition to transparency limiting the energy gain. A transverse instability leads to a structured and inhomogeneous ion distribution.

  14. Accelerate Energy Productivity 2030 | Department of Energy

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

    and the Alliance to Save Energy, released Accelerate Energy Productivity 2030: A Strategic Roadmap for American Energy Innovation, Economic Growth, and Competitiveness (Roadmap). ...

  15. Better Buildings Energy Data Accelerator

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

    Better Buildings Energy Data Accelerator *NEW PROJECT* 2014 Building Technologies Office ... 5. Successfully provide whole-building data access to 20% of included building owners ...

  16. Energy Data Accelerator Stakeholder Engagement

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

    Energy Data Accelerator Stakeholder Engagement 2015 Building Technologies Office Peer ... All Cities and Utilities interested in whole building data access * Key stakeholders, e.g. ...

  17. Operational Radiation Protection in High-Energy Physics Accelerators: Implementation of ALARA in Design and Operation of Accelerators

    SciTech Connect (OSTI)

    Fasso, A.; Rokni, S.; /SLAC

    2011-06-30

    It used to happen often, to us accelerator radiation protection staff, to be asked by a new radiation worker: ?How much dose am I still allowed?? And we smiled looking at the shocked reaction to our answer: ?You are not allowed any dose?. Nowadays, also thanks to improved training programs, this kind of question has become less frequent, but it is still not always easy to convince workers that staying below the exposure limits is not sufficient. After all, radiation is still the only harmful agent for which this is true: for all other risks in everyday life, from road speed limits to concentration of hazardous chemicals in air and water, compliance to regulations is ensured by keeping below a certain value. It appears that a tendency is starting to develop to extend the radiation approach to other pollutants (1), but it will take some time before the new attitude makes it way into national legislations.

  18. Mechanical Design of a High Energy Beam Absorber for the Advanced Superconducting Test Accelerator (ASTA) at Fermilab

    SciTech Connect (OSTI)

    Baffes, C.; Church, M.; Leibfritz, J.; Oplt, S.; Rakhno, I.; /Fermilab

    2012-05-10

    A high energy beam absorber has been built for the Advanced Superconducting Test Accelerator (ASTA) at Fermilab. In the facility's initial configuration, an electron beam will be accelerated through 3 TTF-type or ILC-type SRF cryomodules to an energy of 750MeV. The electron beam will be directed to one of multiple downstream experimental and diagnostic beam lines and then deposited in one of two beam absorbers. The facility is designed to accommodate up to 6 cryomodules, which would produce a 75kW beam at 1.5GeV; this is the driving design condition for the beam absorbers. The beam absorbers consist of water-cooled graphite, aluminum and copper layers contained in a helium-filled enclosure. This paper describes the mechanical implementation of the beam absorbers, with a focus on thermal design and analysis. The potential for radiation-induced degradation of the graphite is discussed.

  19. QUASI-OPTICAL 3-dB HYBRID FOR FUTURE HIGH-ENERGY ACCELERATORS

    SciTech Connect (OSTI)

    Jay L. Hirshfield

    2005-12-15

    Phase-controlled wave combiners-commutators and isolators for protecting rf sources against reflection from the accelerating structure can be built using a 3-dB hybrid built around a metallic grating used in a ''magic-Y'' configuration. Models of the magic-Y were designed and tested, both at 34.272 GHz using the Omega-P Ka-band magnicon, and at 11.424 GHz using the Omega-P/NRL X-band magnicon. All elements of the magic-Y were optimized analytically and numerically. A non-vacuum 34 GHz model of the magic Y was built and tested experimentally at a low power. An engineering design for the high power (vacuum) compressor was configured. Similar steps were taken for the 11-GHz version.

  20. Sandia Energy - Conventional Water Power: Market Acceleration

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

    Market Acceleration Home Stationary Power Energy Conversion Efficiency Water Power Conventional Water Power: Market Acceleration Conventional Water Power: Market AccelerationTara...

  1. Novel X-ray imaging diagnostics of high energy nanosecond pulse accelerators.

    SciTech Connect (OSTI)

    Smith, Graham W.; Gallegos, Roque Rosauro; Hohlfelder, Robert James; Beutler, David Eric; Dudley, John; Seymour, Calvin L. G.; Bell, John D.

    2004-08-01

    Pioneering x-ray imaging has been undertaken on a number of AWE's and Sandia National Laboratories radiation effects x-ray simulators. These simulators typically yield a single very short (<50ns) pulse of high-energy (MeV endpoint energy bremsstrahlung) x-ray radiation with doses in the kilorad (krad(Si)) region. X-ray source targets vary in size from 2 to 25cm diameter, dependent upon the particular simulator. Electronic imaging of the source x-ray emission under dynamic conditions yields valuable information upon how the simulator is performing. The resultant images are of interest to the simulator designer who may configure new x-ray source converter targets and diode designs. The images can provide quantitative information about machine performance during radiation effects testing of components under active conditions. The effects testing program is a valuable interface for validation of high performance computer codes and models for the radiation effects community. A novel high-energy x-ray imaging spectrometer is described whereby the spectral energy (0.1 to 2.5MeV) profile may be discerned from the digitally recorded and viewable images via a pinhole/scintillator/CCD imaging system and knowledge of the filtration parameters. Unique images, analysis and a preliminary evaluation of the capability of the spectrometer are presented. Further, a novel time resolved imaging system is described that captures a sequence of high spatial resolution temporal images, with zero interframe time, in the nanosecond timeframe, of our source x-rays.

  2. Conceptual designs of two petawatt-class pulsed-power accelerators for high-energy-density-physics experiments

    SciTech Connect (OSTI)

    Stygar, W. A.; Awe, T. J.; Bennett, N L; Breden, E. W.; Campbell, E. M.; Clark, R. E.; Cooper, R. A.; Cuneo, M. E.; Ennis, J. B.; Fehl, D. L.; Genoni, T. C.; Gomez, M. R.; Greiser, G. W.; Gruner, F. R.; Herrmann, M. C.; Hutsel, B. T.; Jennings, C. A.; Jobe, D. O.; Jones, B. M.; Jones, M. C.; Jones, P. A.; Knapp, P. F.; Lash, J. S.; LeChien, K. R.; Leckbee, J. J.; Leeper, R. J.; Lewis, S. A.; Long, F. W.; Lucero, D. J.; Madrid, E. A.; Martin, M. R.; Matzen, M. K.; Mazarakis, M. G.; McBride, R. D.; McKee, G. R.; Miller, C. L.; Moore, J. K.; Mostrom, C. B.; Mulville, T. D.; Peterson, K. J.; Porter, J. L.; Reisman, D. B.; Rochau, G. A.; Rochau, G. E.; Rose, D. V.; Savage, M. E.; Sceiford, M. E.; Schmit, P. F.; Schneider, R. F.; Schwarz, J.; Sefkow, A. B.; Sinars, D. B.; Slutz, S. A.; Spielman, R. B.; Stoltzfus, B. S.; Thoma, C.; Vesey, R. A.; Wakeland, P. E.; Welch, D. R.; Wisher, M. L.; Woodworth, J. R.; Bailey, J. E.; Rovang, D. C.

    2015-11-30

    ) simulations suggest Z 300 will deliver 4.3 MJ to the liner, and achieve a yield on the order of 18 MJ. Z 800 is 52 m in diameter and stores 130 MJ. This accelerator generates 890 TW at the output of its LTD system, and delivers 65 MA in 113 ns to a MagLIF target. The peak electrical power at the MagLIF liner is 2500 TW. The principal goal of Z 800 is to achieve high-yield thermonuclear fusion; i.e., a yield that exceeds the energy initially stored by the accelerator’s capacitors. 2D MHD simulations suggest Z 800 will deliver 8.0 MJ to the liner, and achieve a yield on the order of 440 MJ. Z 300 and Z 800, or variations of these accelerators, will allow the international high-energy-density-physics community to conduct advanced inertial-confinement-fusion, radiation-physics, material-physics, and laboratory-astrophysics experiments over heretofore-inaccessible parameter regimes.

  3. Conceptual designs of two petawatt-class pulsed-power accelerators for high-energy-density-physics experiments

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

    Stygar, W. A.; Awe, T. J.; Bennett, N L; Breden, E. W.; Campbell, E. M.; Clark, R. E.; Cooper, R. A.; Cuneo, M. E.; Ennis, J. B.; Fehl, D. L.; et al

    2015-11-30

    ) simulations suggest Z 300 will deliver 4.3 MJ to the liner, and achieve a yield on the order of 18 MJ. Z 800 is 52 m in diameter and stores 130 MJ. This accelerator generates 890 TW at the output of its LTD system, and delivers 65 MA in 113 ns to a MagLIF target. The peak electrical power at the MagLIF liner is 2500 TW. The principal goal of Z 800 is to achieve high-yield thermonuclear fusion; i.e., a yield that exceeds the energy initially stored by the accelerator’s capacitors. 2D MHD simulations suggest Z 800 will deliver 8.0 MJ to the liner, and achieve a yield on the order of 440 MJ. Z 300 and Z 800, or variations of these accelerators, will allow the international high-energy-density-physics community to conduct advanced inertial-confinement-fusion, radiation-physics, material-physics, and laboratory-astrophysics experiments over heretofore-inaccessible parameter regimes.« less

  4. Survey and alignment of high energy physics accelerators and transport lines

    SciTech Connect (OSTI)

    Ruland, R.E.

    1992-11-01

    This talk summarizes the survey and alignment processes of accelerators and transport lines and discusses the propagation of errors associated with these processes. The major geodetic principles governing the survey and alignment measurement space are revisited and their relationship to a lattice coordinate system shown. The paper continues with a broad overview about the activities involved in the step by step sequence from initial absolute alignment to final smoothing. Emphasis is given to the relative alignment of components, in particular to the importance of incorporating methods to remove residual systematic effects in surveying and alignment operations.

  5. High-Intensity Proton Accelerator

    SciTech Connect (OSTI)

    Jay L. Hirshfield

    2011-12-27

    Analysis is presented for an eight-cavity proton cyclotron accelerator that could have advantages as compared with other accelerators because of its potentially high acceleration gradient. The high gradient is possible since protons orbit in a sequence of TE111 rotating mode cavities of equally diminishing frequencies with path lengths during acceleration that greatly exceed the cavity lengths. As the cavities operate at sequential harmonics of a basic repetition frequency, phase synchronism can be maintained over a relatively wide injection phase window without undue beam emittance growth. It is shown that use of radial vanes can allow cavity designs with significantly smaller radii, as compared with simple cylindrical cavities. Preliminary beam transport studies show that acceptable extraction and focusing of a proton beam after cyclic motion in this accelerator should be possible. Progress is also reported on design and tests of a four-cavity electron counterpart accelerator for experiments to study effects on beam quality arising from variations injection phase window width. This device is powered by four 500-MW pulsed amplifiers at 1500, 1800, 2100, and 2400 MHz that provide phase synchronous outputs, since they are driven from a with harmonics derived from a phase-locked 300 MHz source.

  6. A New High-Current Proton Accelerator

    SciTech Connect (OSTI)

    Cleland, M. R.; Galloway, R. A.; DeSanto, L.; Jongen, Y.

    2009-03-10

    A high-current (>20 mA) dc proton accelerator is being developed for applications such as boron neutron capture therapy (BNCT) and the detection of explosive materials by nuclear resonance absorption (NRA) of gamma radiation. The high-voltage dc accelerator (adjustable between 1.4 and 2.8 MeV) will be a single-ended industrial Dynamitron registered system equipped with a compact high-current, microwave-driven proton source. A magnetic mass analyzer inserted between the ion source and the acceleration tube will select the protons and reject heavier ions. A sorption pump near the ion source will minimize the flow of neutral hydrogen gas into the acceleration tube. For BNCT, a lithium target for generating epithermal neutrons is being developed that will be capable of dissipating the high power (>40 kW) of the proton beam. For NRA, special targets will be used to generate gamma rays with suitable energies for exciting nuclides typically present in explosive materials. Proton accelerators with such high-current and high-power capabilities in this energy range have not been developed previously.

  7. Accelerator Driven Nuclear Energy: The Thorium Option

    SciTech Connect (OSTI)

    Raja, Rajendran

    2009-03-18

    Conventional nuclear reactors use enriched Uranium as fuel and produce nuclear waste which needs to be stored away for over 10,000 years. At the current rate of use, existing sources of Uranium will last for 50-100 years. We describe a solution to the problem that uses particle accelerators to produce fast neutrons that can be used to burn existing nuclear waste and produce energy. Such systems, initially proposed by Carlo Rubbia and collaborators in the 1990's, are being seriously considered by many countries as a possible solution to the green energy problem. Accelerator driven reactors operate in a sub-critical regime and, thus, are safer and can obtain energy from plentiful elements such as Thorium-232 and Uranium-238. What is missing is the high intensity (10MW) accelerator that produces 1 GeV protons. We will describe scenarios which if implemented will make such systems a reality.

  8. Offshore Wind Accelerator | Open Energy Information

    Open Energy Info (EERE)

    search Name: Offshore Wind Accelerator Place: United Kingdom Sector: Wind energy Product: Research and development initiative aimed at cutting the cost of offshore wind energy....

  9. Seventhwave: Accelerate Performance | Department of Energy

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

    Accelerate Performance is designed to harness the energy savings potential of the commercial building sector by scaling owner demand for energy performance at a cost comparable to ...

  10. Accelerate Energy Productivity 2030 fact sheet | Department of...

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

    Accelerate Energy Productivity 2030 fact sheet Accelerate Energy Productivity 2030 fact sheet PDF icon Accelerate Energy Productivity 2030 Fact Sheet- Updated More Documents &...

  11. COMPARATIVE STUDIES OF PROTON ACCELERATORS FOR HIGH POWER APPLICATIONS.

    SciTech Connect (OSTI)

    WENG, W.T.

    2006-05-29

    There are many applications requiring high power proton accelerators of various kinds. However, each type of proton accelerator can only provide beam with certain characteristics, hence the match of accelerators and their applications need careful evaluation. In this talk, the beam parameters and performance limitations of linac, cyclotron, synchrotron, and FFAG accelerators are studied and their relative merits for application in neutron, muon, neutrino, and ADS will be assessed in terms of beam energy, intensity, bunch length, repetition rate, and beam power requirements. A possible match between the applications and the accelerator of choice is presented in a matrix form. The accelerator physics and technology issues and challenges involved will also be discussed.

  12. Ultra-high vacuum photoelectron linear accelerator

    DOE Patents [OSTI]

    Yu, David U.L.; Luo, Yan

    2013-07-16

    An rf linear accelerator for producing an electron beam. The outer wall of the rf cavity of said linear accelerator being perforated to allow gas inside said rf cavity to flow to a pressure chamber surrounding said rf cavity and having means of ultra high vacuum pumping of the cathode of said rf linear accelerator. Said rf linear accelerator is used to accelerate polarized or unpolarized electrons produced by a photocathode, or to accelerate thermally heated electrons produced by a thermionic cathode, or to accelerate rf heated field emission electrons produced by a field emission cathode.

  13. Accelerating Offshore Wind Development | Department of Energy

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

    Accelerating Offshore Wind Development Accelerating Offshore Wind Development Click on a project for more information. The Energy Department has selected seven projects that will accelerate the commercialization of innovative offshore wind technologies in the United States. Each project will receive up to $4 million from the Energy Department to complete the engineering, site evaluation, and planning phase of their project. Upon completion of this phase, the Energy Department will select the up

  14. Accelerator Driven Nuclear Energy: The Thorium Option

    SciTech Connect (OSTI)

    Raja, Rajendran

    2009-03-18

    Conventional nuclear reactors use enriched Uranium as fuel and produce nuclear waste which needs to be stored away for over 10,000 years.   At the current rate of use, existing sources of Uranium will last for 50-100 years.  We describe a solution to the problem that uses particle accelerators to produce fast neutrons that can be used to burn existing nuclear waste and produce energy.  Such systems, initially proposed by Carlo Rubbia and collaborators in the 1990's, are being seriously considered by many countries as a possible solution to the green energy problem.  Accelerator driven reactors operate in a sub-critical regime and, thus, are safer and can obtain energy from plentiful elements such as Thorium-232 and Uranium-238. What is missing is the high intensity (10MW) accelerator that produces 1 GeV protons. We will describe scenarios which if implemented will make such systems a reality.  

  15. Accelerator Driven Nuclear Energy: The Thorium Option

    ScienceCinema (OSTI)

    Raja, Rajendran

    2010-01-08

    Conventional nuclear reactors use enriched Uranium as fuel and produce nuclear waste which needs to be stored away for over 10,000 years.   At the current rate of use, existing sources of Uranium will last for 50-100 years.  We describe a solution to the problem that uses particle accelerators to produce fast neutrons that can be used to burn existing nuclear waste and produce energy.  Such systems, initially proposed by Carlo Rubbia and collaborators in the 1990's, are being seriously considered by many countries as a possible solution to the green energy problem.  Accelerator driven reactors operate in a sub-critical regime and, thus, are safer and can obtain energy from plentiful elements such as Thorium-232 and Uranium-238. What is missing is the high intensity (10MW) accelerator that produces 1 GeV protons. We will describe scenarios which if implemented will make such systems a reality.  

  16. High-energy particle acceleration during the implosion driven by three-dimensional X-type current loop coalescence in solar flares

    SciTech Connect (OSTI)

    Sakai, Junichi )

    1990-12-01

    A model for high-energy solar flares is presented to explain prompt proton and electron acceleration within 1 sec to relativistic energies. The three-dimensional X-type current loop coalescence, where two crossed flux tubes interact in one point, is a fundamemtally new process as compared to the one- and two-dimensional cases studied earlier. It is shown that the strong implosion can be driven by the magnetic pinch in the region where two current loops interact. The strong inductive electric field can be excited during the implosion. A test-particle orbit under the EM fields derived from the MHD equations is studied. It is also shown that both protons and electrons can be promptly accelerated to about 100 GeV and 100 MeV, respectively. 26 refs.

  17. Accelerating Tribal Energy Project Development in Alaska | Department of

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

    Energy Accelerating Tribal Energy Project Development in Alaska Accelerating Tribal Energy Project Development in Alaska Accelerating Tribal Energy Project Development in Alaska Accelerating Tribal Energy Project Development in Alaska (299.74 KB) More Documents & Publications Office of Indian Energy Alaska Energy Pioneer Spring 2015 Newsletter DOE Alaska Native Village Renewable Energy Workshop Agenda Alaska Native Village Energy Development Workshop Agenda

  18. Energy Department Announces $25 Million to Accelerate Integration...

    Office of Environmental Management (EM)

    5 Million to Accelerate Integration of Solar Energy into Nation's Electrical Grid Energy Department Announces 25 Million to Accelerate Integration of Solar Energy into Nation's ...

  19. Energy Department Announces New Investments to Accelerate Breakthrough...

    Office of Environmental Management (EM)

    Accelerate Breakthroughs in Cost-Competitive Solar Energy Energy Department Announces New Investments to Accelerate Breakthroughs in Cost-Competitive Solar Energy August 29, 2012 - ...

  20. Energy Department Announces $7 Million to Accelerate Fuel and Engine

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

    Co-Optimization Technologies | Department of Energy 7 Million to Accelerate Fuel and Engine Co-Optimization Technologies Energy Department Announces $7 Million to Accelerate Fuel and Engine Co-Optimization Technologies August 1, 2016 - 1:40pm Addthis The U.S Department of Energy (DOE) announced today up to $7 million in project funding to accelerate the introduction of affordable, scalable, and sustainable high-performance fuels for use in high-efficiency, low-emission engines as part of the

  1. Variable energy constant current accelerator structure

    DOE Patents [OSTI]

    Anderson, O.A.

    1988-07-13

    A variable energy, constant current ion beam accelerator structure is disclosed comprising an ion source capable of providing the desired ions, a pre-accelerator for establishing an initial energy level, a matching/pumping module having means for focusing means for maintaining the beam current, and at least one main accelerator module for continuing beam focus, with means capable of variably imparting acceleration to the beam so that a constant beam output current is maintained independent of the variable output energy. In a preferred embodiment, quadrupole electrodes are provided in both the matching/pumping module and the one or more accelerator modules, and are formed using four opposing cylinder electrodes which extend parallel to the beam axis and are spaced around the beam at 90/degree/ intervals with opposing electrodes maintained at the same potential. 12 figs., 3 tabs.

  2. Comments on shielding for dual energy accelerators

    SciTech Connect (OSTI)

    Rossi, M. C.; Lincoln, H. M.; Quarin, D. J.; Zwicker, R. D.

    2008-06-15

    Determination of shielding requirements for medical linear accelerators has been greatly facilitated by the publication of the National Council on Radiation Protection and Measurements (NCRP) latest guidelines on this subject in NCRP Report No. 151. In the present report the authors review their own recent experience with patient treatments on conventional dual energy linear accelerators to examine the various input parameters needed to follow the NCRP guidelines. Some discussion is included of workloads, occupancy, use factors, and field size, with the effects of intensity modulated radiotherapy (IMRT) treatments included. Studies of collimator settings showed average values of 13.1x16.2 cm{sup 2} for 6 MV and 14.1x16.8 cm{sup 2} for 18 MV conventional ports, and corresponding average unblocked areas of 228 and 254 cm{sup 2}, respectively. With an average of 77% of the field area unblocked, this gives a mean irradiated area of 196 cm{sup 2} for the 18 MV beam, which dominates shielding considerations for most dual energy machines. Assuming conservatively small room dimensions, a gantry bin angle of 18 deg. was found to represent a reasonable unit for tabulation of use factors. For conventional 18 MV treatments it was found that the usual treatment angles of 0, 90, 180, and 270 deg. were still favored, and use factors of 0.25 represent reasonable estimates for these beams. As expected, the IMRT fields (all at 6 MV) showed a high degree of gantry angle randomization, with no bin having a use factor in excess of 0.10. It is concluded that unless a significant number of patients are treated with high energy IMRT, the traditional use factors of 0.25 are appropriate for the dominant high energy beam.

  3. 17 GHz High Gradient Accelerator Research

    SciTech Connect (OSTI)

    Temkin, Richard J.; Shapiro, Michael A.

    2013-07-10

    This is a report on the MIT High Gradient Accelerator Research program which has included: Operation of the 17 GHz, 25 MeV MIT/Haimson Research Corp. electron accelerator at MIT, the highest frequency, stand-alone accelerator in the world; collaboration with members of the US High Gradient Collaboration, including the design and test of novel structures at SLAC at 11.4 GHz; the design, construction and testing of photonic bandgap structures, including metallic and dielectric structures; the investigation of the wakefields in novel structures; and the training of the next generation of graduate students and postdoctoral associates in accelerator physics.

  4. Saul Perlmutter, Distant Supernovae, Dark Energy, and the Accelerating...

    Office of Scientific and Technical Information (OSTI)

    Saul Perlmutter, Distant Supernovae, Dark Energy, and the Accelerating Expansion of the ... studies to determine the nature of dark energy.'1 'The accelerating expansion means that ...

  5. Accelerating Clean Energy Adoption Fact Sheet | Department of...

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

    Accelerating Clean Energy Adoption Fact Sheet Accelerating Clean Energy Adoption Fact Sheet This fact sheet is an overview of the Department of Weatherization and Intergovernmental ...

  6. A Statistical Perspective on Highly Accelerated Testing.

    SciTech Connect (OSTI)

    Thomas, Edward V.

    2015-02-01

    Highly accelerated life testing has been heavily promoted at Sandia (and elsewhere) as a means to rapidly identify product weaknesses caused by flaws in the product's design or manufacturing process. During product development, a small number of units are forced to fail at high stress. The failed units are then examined to determine the root causes of failure. The identification of the root causes of product failures exposed by highly accelerated life testing can instigate changes to the product's design and/or manufacturing process that result in a product with increased reliability. It is widely viewed that this qualitative use of highly accelerated life testing (often associated with the acronym HALT) can be useful. However, highly accelerated life testing has also been proposed as a quantitative means for "demonstrating" the reliability of a product where unreliability is associated with loss of margin via an identified and dominating failure mechanism. It is assumed that the dominant failure mechanism can be accelerated by changing the level of a stress factor that is assumed to be related to the dominant failure mode. In extreme cases, a minimal number of units (often from a pre-production lot) are subjected to a single highly accelerated stress relative to normal use. If no (or, sufficiently few) units fail at this high stress level, some might claim that a certain level of reliability has been demonstrated (relative to normal use conditions). Underlying this claim are assumptions regarding the level of knowledge associated with the relationship between the stress level and the probability of failure. The primary purpose of this document is to discuss (from a statistical perspective) the efficacy of using accelerated life testing protocols (and, in particular, "highly accelerated" protocols) to make quantitative inferences concerning the performance of a product (e.g., reliability) when in fact there is lack-of-knowledge and uncertainty concerning the

  7. High intensity proton operation at the Brookhaven AGS accelerator complex

    SciTech Connect (OSTI)

    Ahrens, L.A.; Blaskiewicz, M.; Bleser, E.; Brennan, J.M.; Gardner, C.; Glenn, J.W.; Onillon, E.; Reece, R.K.; Roser, T.; Soukas, A.

    1994-08-01

    With the completion of the AGS rf upgrade, and the implementation of a transition {open_quotes}jump{close_quotes}, all of accelerator systems were in place in 1994 to allow acceleration of the proton intensity available from the AGS Booster injector to AGS extraction energy and delivery to the high energy users. Beam commissioning results with these new systems are presented. Progress in identifying and overcoming other obstacles to higher intensity are given. These include a careful exploration of the stopband strengths present on the AGS injection magnetic porch, and implementation of the AGS single bunch transverse dampers throughout the acceleration cycle.

  8. Energy Department Announces Publication of Better Buildings Energy Data Accelerator Resources Toolkit

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy today announced the publication of a high-impact, informational resources toolkit through its Better Buildings Energy Data Accelerator developed in partnership with 18...

  9. TAP Webinar: High Performance Outdoor Lighting Accelerator

    Broader source: Energy.gov [DOE]

    Hosted by the Technical Assistance Program (TAP), this webinar will cover the recently announced expansion of the Better Buildings platform —the High Performance Outdoor Lighting Accelerator (HPOLA).

  10. Variable energy constant current accelerator structure

    DOE Patents [OSTI]

    Anderson, Oscar A.

    1990-01-01

    A variable energy, constant current ion beam accelerator structure is disclosed comprising an ion source capable of providing the desired ions, a pre-accelerator for establishing an initial energy level, a matching/pumping module having means for focusing means for maintaining the beam current, and at least one main accelerator module for continuing beam focus, with means capable of variably imparting acceleration to the beam so that a constant beam output current is maintained independent of the variable output energy. In a preferred embodiment, quadrupole electrodes are provided in both the matching/pumping module and the one or more accelerator modules, and are formed using four opposing cylinder electrodes which extend parallel to the beam axis and are spaced around the beam at 90.degree. intervals with opposing electrodes maintained at the same potential. Adjacent cylinder electrodes of the quadrupole structure are maintained at different potentials to thereby reshape the cross section of the charged particle beam to an ellipse in cross section at the mid point along each quadrupole electrode unit in the accelerator modules. The beam is maintained in focus by alternating the major axis of the ellipse along the x and y axis respectively at adjacent quadrupoles. In another embodiment, electrostatic ring electrodes may be utilized instead of the quadrupole electrodes.

  11. OSTIblog Articles in the Accelerated Climate Modeling for Energy Topic |

    Office of Scientific and Technical Information (OSTI)

    OSTI, US Dept of Energy Office of Scientific and Technical Information Accelerated Climate Modeling for Energy

  12. Accelerator physics and technology limitations to ultimate energy...

    Office of Scientific and Technical Information (OSTI)

    Accelerator physics and technology limitations to ultimate energy and luminosity in very large hadron colliders Citation Details In-Document Search Title: Accelerator physics and ...

  13. Energy Department Announces New Investment to Accelerate Next...

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

    to Accelerate Next Generation Biofuels Energy Department Announces New Investment to Accelerate Next Generation Biofuels July 1, 2013 - 1:00pm Addthis News Media Contact (202) ...

  14. High current electron linacs (advanced test accelerator/experimental test accelerator)

    SciTech Connect (OSTI)

    Briggs, R.J.

    1984-04-30

    The high current induction accelerator development at the Lawrence Livermore National Laboratory is described. The ATA facility is designed for 10 kA peak currents, 50 nsec pulse lengths and 50 MeV energies. At this time, half of the design current has been accelerated through the entire machine to particle energies of about 45 MeV. Current problem areas and operational experience to date will be discussed. Several key technical areas required development for the ATA machine; this report will survey these developments. The control of transverse beam instabilities required an accelerating cavity design with very low Q. Electron sources capable of 10 kA operation at high rep rates were developed using a plasma sparkboard approach. The pulse power systems on ATA, using the same type of spark gap switches as ETA, have exhibited excellent operational reliability.

  15. SLIM, Short-pulse Technology for High Gradient Induction Accelerators

    SciTech Connect (OSTI)

    Arntz, Floyd; Kardo-Sysoev, A.; Krasnykh, A.; /SLAC

    2008-12-16

    A novel short-pulse concept (SLIM) suited to a new generation of a high gradient induction particle accelerators is described herein. It applies advanced solid state semiconductor technology and modern microfabrication techniques to a coreless induction method of charged particle acceleration first proven on a macro scale in the 1960's. Because this approach avoids use of magnetic materials there is the prospect of such an accelerator working efficiently with accelerating pulses in the nanosecond range and, potentially, at megahertz pulse rates. The principal accelerator section is envisioned as a stack of coreless induction cells, the only active element within each being a single, extremely fast (subnanosecond) solid state opening switch: a Drift Step Recovery Diode (DSRD). Each coreless induction cell incorporates an electromagnetic pulse compressor in which inductive energy developed within a transmission-line feed structure over a period of tens of nanoseconds is diverted to the acceleration of the passing charge packet for a few nanoseconds by the abrupt opening of the DSRD switch. The duration of this accelerating output pulse--typically two-to-four nanoseconds--is precisely determined by a microfabricated pulse forming line connected to the cell. Because the accelerating pulse is only nanoseconds in duration, longitudinal accelerating gradients approaching 100 MeV per meter are believed to be achievable without inciting breakdown. Further benefits of this approach are that, (1) only a low voltage power supply is required to produce the high accelerating gradient, and, (2) since the DSRD switch is normally closed, voltage stress is limited to a few nanoseconds per period, hence the susceptibility to hostile environment conditions such as ionizing radiation, mismatch (e.g. in medical applications the peak beam current may be low), strong electromagnetic noise levels, etc is expected to be minimal. Finally, we observe the SLIM concept is not limited to linac

  16. Energy Department Announces Investments to Accelerate U.S. Manufacturi...

    Office of Environmental Management (EM)

    of Energy Efficient Lighting Technologies Energy Department Announces Investments to Accelerate U.S. Manufacturing of Energy Efficient Lighting Technologies June 7, 2012 - ...

  17. Low energy demonstration accelerator technical area 53

    SciTech Connect (OSTI)

    1996-04-01

    As part of the Department of Energy`s (DOE) need to maintain the capability of producing tritium in support of its historic and near-term stewardship of the nation`s nuclear weapons stockpile, the agency has recently completed a Programmatic Environmental Impact Statement for Tritium Supply and Recycling. The resulting Record of Decision (ROD) determined that over the next three years the DOE would follow a dual-track acquisition strategy that assures tritium production for the nuclear weapon stockpile in a rapid, cost effective, and safe manner. Under this strategy the DOE will further investigate and compare two options for producing tritium: (1) purchase of an existing commercial light-water reactor or irradiation services with an option to purchase the reactor for conversion to a defense facility; and (2) design, build, and test critical components of a system for accelerator production of tritium (APT). The final decision to select the primary production option will be made by the Secretary of Energy in the October 1998 time frame. The alternative not chosen as the primary production method, if feasible, would be developed as a back-up tritium supply source. This Environmental Assessment (EA) analyzes the potential environmental effects that would be expected to occur if the DOE were to design, build, and test critical prototypical components of the accelerator system for tritium production, specifically the front-end low-energy section of the accelerator, at Los Alamos National Laboratory. The Low Energy Demonstration Accelerator (LEDA) would be incrementally developed and tested in five separate stages over the next seven years. The following issues were evaluated for the proposed action: utility demands, air, human health, environmental restoration, waste management, transportation, water, threatened and endangered species, wetlands, cultural resources, and environmental justice.

  18. Grid Engineering for Accelerated Renewable Energy Deployment | Department

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

    of Energy Photovoltaics » Grid Engineering for Accelerated Renewable Energy Deployment Grid Engineering for Accelerated Renewable Energy Deployment Grid Engineering for Accelerated Renewable Energy Deployment The SunShot Grid Engineering for Accelerated Renewable Energy Deployment (GEARED) program is a research, training and education framework that grows the expertise and preparedness of current and future electric utility sector professionals so they have the knowledge and skills required

  19. Accelerated Testing Validation | Department of Energy

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

    Testing Validation Accelerated Testing Validation Presented at the Department of Energy Fuel Cell Projects Kickoff Meeting, September 1 - October 1, 2009 mukundan_lanl_kickoff.pdf (412.81 KB) More Documents & Publications DOE Fuel Cell Pre-Solicitation Workshop - Breakout Group 2: MEAs, Components, and Integration Development of Micro-structural Mitigation Strategies for PEM Fuel Cells: Morphological Simulation and Experimental Approaches Improved AST's Based on Real World FCV Data

  20. Siemens Technology Accelerator | Open Energy Information

    Open Energy Info (EERE)

    Technology Accelerator Jump to: navigation, search Name: Siemens Technology Accelerator Place: Germany Sector: Services Product: General Financial & Legal Services ( Subsidiary ...

  1. SETsquared Business Acceleration | Open Energy Information

    Open Energy Info (EERE)

    SETsquared Business Acceleration Jump to: navigation, search Name: SETsquared Business Acceleration Place: United Kingdom Sector: Services Product: General Financial & Legal...

  2. Energy Department Announces New Lab Program to Accelerate Commercialization

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

    of Clean Energy Technologies | Department of Energy Lab Program to Accelerate Commercialization of Clean Energy Technologies Energy Department Announces New Lab Program to Accelerate Commercialization of Clean Energy Technologies October 29, 2014 - 2:30pm Addthis News Media Contact 202-586-4940 Energy Department Announces New Lab Program to Accelerate Commercialization of Clean Energy Technologies Lab-Corps Will Help Move Innovative Technologies from National Labs into the Marketplace

  3. Method and apparatus for varying accelerator beam output energy

    DOE Patents [OSTI]

    Young, Lloyd M.

    1998-01-01

    A coupled cavity accelerator (CCA) accelerates a charged particle beam with rf energy from a rf source. An input accelerating cavity receives the charged particle beam and an output accelerating cavity outputs the charged particle beam at an increased energy. Intermediate accelerating cavities connect the input and the output accelerating cavities to accelerate the charged particle beam. A plurality of tunable coupling cavities are arranged so that each one of the tunable coupling cavities respectively connect an adjacent pair of the input, output, and intermediate accelerating cavities to transfer the rf energy along the accelerating cavities. An output tunable coupling cavity can be detuned to variably change the phase of the rf energy reflected from the output coupling cavity so that regions of the accelerator can be selectively turned off when one of the intermediate tunable coupling cavities is also detuned.

  4. Accelerating CHP Deployment, United States Energy Association (USEA), August 2011

    Broader source: Energy.gov [DOE]

    An Industry Consultation by the United States Energy Association (USEA) on Accelerating Combined Heat and Power (CHP) Deployment

  5. Energy Department Accelerates the Deployment of Advanced Vehicle...

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

    Vehicle Technologies with Private Industry Partnerships Energy Department Accelerates the Deployment of Advanced Vehicle Technologies with Private Industry Partnerships March ...

  6. Energy Department Announces New Investments to Accelerate Breakthroughs in

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

    Cost-Competitive Solar Energy | Department of Energy to Accelerate Breakthroughs in Cost-Competitive Solar Energy Energy Department Announces New Investments to Accelerate Breakthroughs in Cost-Competitive Solar Energy August 29, 2012 - 1:57pm Addthis News Media Contact (202) 586-4940 WASHINGTON -- Building off SunShot Initiative investments in concentrating solar power announced earlier this week, the Energy Department today announced five new research projects to accelerate innovations

  7. High gradient accelerators for linear light sources

    SciTech Connect (OSTI)

    Barletta, W.A.

    1988-09-26

    Ultra-high gradient radio frequency linacs powered by relativistic klystrons appear to be able to provide compact sources of radiation at XUV and soft x-ray wavelengths with a duration of 1 picosecond or less. This paper provides a tutorial review of the physics applicable to scaling the present experience of the accelerator community to the regime applicable to compact linear light sources. 22 refs., 11 figs., 21 tabs.

  8. Accelerating the Transition to Clean Energy Technologies | Department...

    Office of Environmental Management (EM)

    the Transition to Clean Energy Technologies Accelerating the Transition to Clean Energy Technologies April 5, 2011 - 2:40pm Addthis David Sandalow David Sandalow Former Under ...

  9. Better Buildings Accelerators: Driving Uptake of Home Energy Information

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

    and Upgrade Programs Nationwide | Department of Energy Better Buildings Accelerators: Driving Uptake of Home Energy Information and Upgrade Programs Nationwide Better Buildings Accelerators: Driving Uptake of Home Energy Information and Upgrade Programs Nationwide March 14, 2016 - 2:18pm Addthis The U.S. Department of Energy's Better Buildings Home Upgrade Program and Home Energy Information Accelerators work with partners across the nation and are making important progress in lowering the

  10. U.S. Department of Energy Fermi National Accelerator Laboratory |

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

    Department of Energy Fermi National Accelerator Laboratory U.S. Department of Energy Fermi National Accelerator Laboratory The U.S. Department of Energy's (DOE's) Fermi National Accelerator Laboratory (Fermilab) has replaced old equipment and reduced energy consumption through a partnership with its electric utility, Commonwealth Edison. Fermilab upgraded the centralized cooling system and separated the system into two segments-a "comfort system" to cool the employee office space

  11. Amped Up! Magazine - Accelerating Clean Energy through an Innovation

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

    Ecosystem | Department of Energy Amped Up! Magazine - Accelerating Clean Energy through an Innovation Ecosystem Amped Up! Magazine - Accelerating Clean Energy through an Innovation Ecosystem Amped Up! Magazine features new Acting Assistant Secretary David Friedman and his vision for moving EERE forward as well as the office's efforts in building an innovation ecosystem to accelerate clean energy ideas to the marketplace. In This Issue cover replacement.png Friedman Primed to Pace America's

  12. Superconductor Requirements and Characterization for High Field Accelerator Magnets

    SciTech Connect (OSTI)

    Barzi, E.; Zlobin, A. V.

    2015-05-01

    The 2014 Particle Physics Project Prioritization Panel (P5) strategic plan for U.S. High Energy Physics (HEP) endorses a continued world leadership role in superconducting magnet technology for future Energy Frontier Programs. This includes 10 to 15 T Nb3Sn accelerator magnets for LHC upgrades and a future 100 TeV scale pp collider, and as ultimate goal that of developing magnet technologies above 20 T based on both High Temperature Superconductors (HTS) and Low Temperature Superconductors (LTS) for accelerator magnets. To achieve these objectives, a sound conductor development and characterization program is needed and is herein described. This program is intended to be conducted in close collaboration with U.S. and International labs, Universities and Industry.

  13. Energy Department Announces $25 Million to Accelerate Integration of Solar

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

    Energy into Nation's Electrical Grid | Department of Energy 25 Million to Accelerate Integration of Solar Energy into Nation's Electrical Grid Energy Department Announces $25 Million to Accelerate Integration of Solar Energy into Nation's Electrical Grid May 2, 2016 - 5:19pm Addthis News Media Contact 202-586-4940 DOENews@hq.doe.gov WASHINGTON, D.C. - As part of the Energy Department's ongoing efforts to modernize the nation's grid through the Grid Modernization Initiative, the Energy

  14. High Energy Physics

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

    High Energy Physics High Energy Physics Investigating the field of high energy physics ... Through the Office of High Energy Physics (HEP), Los Alamos conducts research in particle ...

  15. High-gradient compact linear accelerator

    DOE Patents [OSTI]

    Carder, B.M.

    1998-05-26

    A high-gradient linear accelerator comprises a solid-state stack in a vacuum of five sets of disc-shaped Blumlein modules each having a center hole through which particles are sequentially accelerated. Each Blumlein module is a sandwich of two outer conductive plates that bracket an inner conductive plate positioned between two dielectric plates with different thicknesses and dielectric constants. A third dielectric core in the shape of a hollow cylinder forms a casing down the series of center holes, and it has a dielectric constant different that the two dielectric plates that sandwich the inner conductive plate. In operation, all the inner conductive plates are charged to the same DC potential relative to the outer conductive plates. Next, all the inner conductive plates are simultaneously shorted to the outer conductive plates at the outer diameters. The signal short will propagate to the inner diameters at two different rates in each Blumlein module. A faster wave propagates quicker to the third dielectric core across the dielectric plates with the closer spacing and lower dielectric constant. When the faster wave reaches the inner extents of the outer and inner conductive plates, it reflects back outward and reverses the field in that segment of the dielectric core. All the field segments in the dielectric core are then in unipolar agreement until the slower wave finally propagates to the third dielectric core across the dielectric plates with the wider spacing and higher dielectric constant. During such unipolar agreement, particles in the core are accelerated with gradients that exceed twenty megavolts per meter. 10 figs.

  16. High-gradient compact linear accelerator

    DOE Patents [OSTI]

    Carder, Bruce M.

    1998-01-01

    A high-gradient linear accelerator comprises a solid-state stack in a vacuum of five sets of disc-shaped Blumlein modules each having a center hole through which particles are sequentially accelerated. Each Blumlein module is a sandwich of two outer conductive plates that bracket an inner conductive plate positioned between two dielectric plates with different thicknesses and dielectric constants. A third dielectric core in the shape of a hollow cylinder forms a casing down the series of center holes, and it has a dielectric constant different that the two dielectric plates that sandwich the inner conductive plate. In operation, all the inner conductive plates are charged to the same DC potential relative to the outer conductive plates. Next, all the inner conductive plates are simultaneously shorted to the outer conductive plates at the outer diameters. The signal short will propagate to the inner diameters at two different rates in each Blumlein module. A faster wave propagates quicker to the third dielectric core across the dielectric plates with the closer spacing and lower dielectric constant. When the faster wave reaches the inner extents of the outer and inner conductive plates, it reflects back outward and reverses the field in that segment of the dielectric core. All the field segments in the dielectric core are then in unipolar agreement until the slower wave finally propagates to the third dielectric core across the dielectric plates with the wider spacing and higher dielectric constant. During such unipolar agreement, particles in the core are accelerated with gradients that exceed twenty megavolts per meter.

  17. Department of Energy Awards $338 Million to Accelerate Domestic Geothermal

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

    Energy | Department of Energy Awards $338 Million to Accelerate Domestic Geothermal Energy Department of Energy Awards $338 Million to Accelerate Domestic Geothermal Energy October 29, 2009 - 12:32pm Addthis WASHINGTON, DC - U.S. Department of Energy Secretary Steven Chu today announced up to $338 million in Recovery Act funding for the exploration and development of new geothermal fields and research into advanced geothermal technologies. These grants will support 123 projects in 39 states,

  18. Department of Energy Awards $338 Million to Accelerate Domestic Geothermal

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

    Energy | Department of Energy 38 Million to Accelerate Domestic Geothermal Energy Department of Energy Awards $338 Million to Accelerate Domestic Geothermal Energy October 29, 2009 - 12:00am Addthis WASHINGTON, DC - U.S. Department of Energy Secretary Steven Chu today announced up to $338 million in Recovery Act funding for the exploration and development of new geothermal fields and research into advanced geothermal technologies. These grants will support 123 projects in 39 states, with

  19. Energy Department Announces $6 Million to Accelerate Alternative...

    Office of Environmental Management (EM)

    6 Million to Accelerate Alternative Fuel Vehicle Market Growth Energy Department Announces 6 ... Usage of Alternative Fuels Hyundai Fuel Cell EV Everywhere: America's Plug-In ...

  20. Accelerator physics and technology limitations to ultimate energy...

    Office of Scientific and Technical Information (OSTI)

    Title: Accelerator physics and technology limitations to ultimate energy and luminosity in very large hadron colliders Authors: Bauer, P. ; Limon, P. ; Peggs, Stephen G. ; Syphers, ...

  1. COLLOQUIUM: Probing the Accelerating Universe with the Dark Energy...

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

    MBG Auditorium, PPPL (284 cap.) COLLOQUIUM: Probing the Accelerating Universe with the Dark Energy Survey Dr. Joshua Frieman Fermilab and the University of Chicago Presentation: ...

  2. Multi-gigaelectronvolt, low-energy spread acceleration of positrons...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Multi-gigaelectronvolt, low-energy spread acceleration of positrons in a self-loaded plasma wakefield Citation Details In-Document Search Title:...

  3. NREL Partners with California to Accelerate Advanced Energy Communities |

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

    Energy Systems Integration | NREL NREL Partners with California to Accelerate Advanced Energy Communities June 1, 2016 The California Energy Commission has selected NREL to be part of a team that will complete a major applied research project to accelerate the deployment of Advanced Energy Communities (AEC). Team members also include the Advanced Power and Energy Program at the University of California, Irvine (UCI), the City of Huntington Beach, and Altura Associates, Inc. NREL will use

  4. High Energy Density Microwaves

    SciTech Connect (OSTI)

    Phillips, R.M. [Stanford Linear Accelerator Center, Stanford, CA 94309 (United States)

    1999-04-01

    These proceedings represent papers presented at the RF98 Workshop entitled `High Energy Density Microwaves` held in California in October, 1998. The topics discussed were predominantly accelerator{minus}related. The Workshop dealt, for the most part, with the generation and control of electron beams, the amplification of RF signals, the design of mode converters, and the effect of very high RF field gradients. This Workshop was designed to address the concerns of the microwave tube industry worldwide, the plasma physicists who deal with very high beam currents and gigawatts of RF power, and researchers in accelerator centers around the world. Papers were presented on multibeam klystrons, gyrotron development, plasmas in microwave tubes, RF breakdown, and alternatives to conventional linear coliders at 1 TeV and above. The Workshop was partially sponsored by the US Department of Energy. There were 46 papers presented at the conference,out of which 19 have been abstracted for the Energy,Science and Technology database.(AIP)

  5. Accelerated Technique for Carbon Mesoporous Materials - Energy...

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

    Advanced Materials Find More Like This Return to Search Accelerated Technique for Carbon Mesoporous Materials Oak Ridge National Laboratory Contact ORNL About This Technology...

  6. Lab-Corps Program Helping to Accelerate Commercialization of Clean Energy

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

    Technologies from our National Labs | Department of Energy Lab-Corps Program Helping to Accelerate Commercialization of Clean Energy Technologies from our National Labs Lab-Corps Program Helping to Accelerate Commercialization of Clean Energy Technologies from our National Labs July 30, 2015 - 1:00pm Addthis The Energy Department's Lab-Corps pilot program is a national network that aims to unleash national lab researchers to successfully transition their discoveries into high-impact

  7. Slow Waveguide Structures for Particle Accelerators - Energy Innovation

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

    Portal Energy Analysis Energy Analysis Electricity Transmission Electricity Transmission Early Stage R&D Early Stage R&D Find More Like This Return to Search Slow Waveguide Structures for Particle Accelerators Oak Ridge National Laboratory Contact ORNL About This Technology Technology Marketing SummaryA waveguide design that can save time and money in the construction and tuning of a particle accelerator was developed by ORNL researchers. Particle accelerators use electromagnetic

  8. High-field plasma acceleration in a high-ionization-potential gas

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

    Corde, S.; Adli, E.; Allen, J. M.; An, W.; Clarke, C. I.; Clausse, B.; Clayton, C. E.; Delahaye, J. P.; Frederico, J.; Gessner, S.; et al

    2016-06-17

    Plasma accelerators driven by particle beams are a very promising future accelerator technology as they can sustain high accelerating fields over long distances with high energy efficiency. They rely on the excitation of a plasma wave in the wake of a drive beam. To generate the plasma, a neutral gas can be field-ionized by the head of the drive beam, in which case the distance of acceleration and energy gain can be strongly limited by head erosion. In our research, we overcome this limit and demonstrate that electrons in the tail of a drive beam can be accelerated by upmore » to 27 GeV in a high-ionization-potential gas (argon), boosting their initial 20.35 GeV energy by 130%. Particle-in-cell simulations show that the argon plasma is sustaining very high electric fields, of ~150 GV m-1, over ~20 cm. Lastly, the results open new possibilities for the design of particle beam drivers and plasma sources.« less

  9. Accelerating Energy Savings Performance Contracting Through Model Statewide Programs

    Office of Energy Efficiency and Renewable Energy (EERE)

    Provides information on Energy Savings Performance Contracing (ESPC), including links to best practices and tools as well as the Accelerated ESCP initiative and types of assistance available. Author: Energy Services Coalition

  10. NREL Partners with California to Accelerate Advanced Energy Communities |

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

    Buildings | NREL Partners with California to Accelerate Advanced Energy Communities June 1, 2016 The California Energy Commission has selected NREL to be part of a team that will complete a major applied research project to accelerate the deployment of Advanced Energy Communities (AEC). Team members also include the Advanced Power and Energy Program at the University of California, Irvine (UCI), the City of Huntington Beach, and Altura Associates, Inc. NREL will use advanced analytics

  11. Accelerating Materials Development for a Clean Energy Future | Department

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

    of Energy Materials Development for a Clean Energy Future Accelerating Materials Development for a Clean Energy Future February 24, 2016 - 2:30pm Addthis Accelerating Materials Development for a Clean Energy Future Reuben Sarkar Reuben Sarkar Deputy Assistant Secretary for Transportation Megan Brewster Senior Policy Advisor for Advanced Manufacturing at the White House Office of Science and Technology Policy Lloyd Whitman Assistant Director for Nanotechnology and Advanced Materials at the

  12. high renewable energy penetration

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

    high renewable energy penetration - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future ...

  13. U.S. Department of Energy Selects Venture Capital Firms to Accelerate...

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

    Venture Capital Firms to Accelerate Adoption of Advanced Energy Technologies U.S. Department of Energy Selects Venture Capital Firms to Accelerate Adoption of Advanced Energy ...

  14. The effect of stochastic re-acceleration on the energy spectrum of shock-accelerated protons

    SciTech Connect (OSTI)

    Afanasiev, Alexandr; Vainio, Rami; Kocharov, Leon

    2014-07-20

    The energy spectra of particles in gradual solar energetic particle (SEP) events do not always have a power-law form attributed to the diffusive shock acceleration mechanism. In particular, the observed spectra in major SEP events can take the form of a broken (double) power law. In this paper, we study the effect of a process that can modify the power-law spectral form produced by the diffusive shock acceleration: the stochastic re-acceleration of energetic protons by enhanced Alfvénic turbulence in the downstream region of a shock wave. There are arguments suggesting that this process can be important when the shock propagates in the corona. We consider a coronal magnetic loop traversed by a shock and perform Monte Carlo simulations of interactions of shock-accelerated protons with Alfvén waves in the loop. The wave-particle interactions are treated self-consistently, so the finiteness of the available turbulent energy is taken into account. The initial energy spectrum of particles is taken to be a power law. The simulations reveal that the stochastic re-acceleration leads either to the formation of a spectrum that is described in a wide energy range by a power law (although the resulting power-law index is different from the initial one) or to a broken power-law spectrum. The resulting spectral form is determined by the ratio of the energy density of shock-accelerated protons to the wave energy density in the shock's downstream region.

  15. Theoretical High Energy Physics | Argonne National Laboratory

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

    Research Accelerator Technology ATLAS at the LHC Cosmology & Astrophysics Instrumentation Precision Muon Physics Neutrino Physics Theoretical High Energy Physics Theoretical High Energy Physics Theoretical High Energy Physics Much of the work of high-energy physics concentrates on the interplay between theory and experiment. The theory group of Argonne's High Energy Physics Division performs high-precision calculations of Standard Model processes, interprets experimental data in terms of

  16. Energy Department Announces $11 Million to Accelerate Alternative Fuel Use

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

    in Medium- and Heavy-Duty Vehicles | Department of Energy 1 Million to Accelerate Alternative Fuel Use in Medium- and Heavy-Duty Vehicles Energy Department Announces $11 Million to Accelerate Alternative Fuel Use in Medium- and Heavy-Duty Vehicles September 10, 2015 - 1:44pm Addthis The Energy Department today announced $11 million in available funding to support development and demonstration of innovative alternative technologies for medium- and heavy-duty vehicles, designed to help reduce

  17. Creating Coalitions to Accelerate Clean Energy Technologies | Department of

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

    Energy Creating Coalitions to Accelerate Clean Energy Technologies Creating Coalitions to Accelerate Clean Energy Technologies Presented at the State and Regional Initiatives Informational Call and Meeting Series Relaunch Introduction on December 14, 2010. infocall10_ttc.pdf (192.44 KB) More Documents & Publications Degradation Study of the Peel Strength of Mini-Modules Under Damp Heat Condition H2L3: Hydrogen Learning for Local Leaders Ex Parte Memorandum

  18. Gateway for Accelerated Innovation in Nuclear | Department of Energy

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

    Gateway for Accelerated Innovation in Nuclear Gateway for Accelerated Innovation in Nuclear In November 2015, DOE announced it is establishing the Gateway for Accelerated Innovation in Nuclear (GAIN) to provide the nuclear energy community with access to the technical, regulatory, and financial support necessary to move new or advanced nuclear reactor designs toward commercialization while ensuring the continued safe, reliable, and economic operation of the existing nuclear fleet. GAIN will

  19. Hydropower Market Acceleration and Deployment | Department of Energy

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

    Market Acceleration and Deployment Hydropower Market Acceleration and Deployment Hydropower Market Acceleration and Deployment Hydropower significantly contributes to the nation's renewable energy portfolio. In fact, over the last decade, the United States obtained over 6% of its electricity from hydropower sources. As the largest source of renewable electricity in the United States, there remains vast untapped resource potential in hydropower. The Water Power Program works to do the following:

  20. Amped Up! Magazine - Accelerating Clean Energy through an Innovation

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

    Ecosystem | Department of Energy Amped Up! Magazine - Accelerating Clean Energy through an Innovation Ecosystem The Office of Energy Efficiency and Renewable Energy (EERE) has a new acting assistant secretary in David Friedman who plans to continue to support EERE’s clean energy revolution and help strengthen its innovation ecosystem. The Office of Energy Efficiency and Renewable Energy (EERE) has a new acting assistant secretary in David Friedman who plans to continue to support EERE's

  1. Beyond Solyndra: How the Energy Department's Loans are Accelerating

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

    America's Transition to a Clean Energy Future | Department of Energy Solyndra: How the Energy Department's Loans are Accelerating America's Transition to a Clean Energy Future Beyond Solyndra: How the Energy Department's Loans are Accelerating America's Transition to a Clean Energy Future June 21, 2012 - 11:00am Addthis 1 of 14 2 of 14 3 of 14 4 of 14 5 of 14 6 of 14 7 of 14 8 of 14 9 of 14 10 of 14 11 of 14 12 of 14 13 of 14 14 of 14 Dan Leistikow Dan Leistikow Former Director, Office of

  2. Beyond Solyndra: How the Energy Department's Loans are Accelerating

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

    America's Transition to a Clean Energy Future | Department of Energy Beyond Solyndra: How the Energy Department's Loans are Accelerating America's Transition to a Clean Energy Future Beyond Solyndra: How the Energy Department's Loans are Accelerating America's Transition to a Clean Energy Future Addthis 1 of 14 2 of 14 3 of 14 4 of 14 5 of 14 6 of 14 7 of 14 8 of 14 9 of 14 10 of 14 11 of 14 12 of 14 13 of 14 14 of 14

  3. Separated-orbit bisected energy-recovered linear accelerator

    DOE Patents [OSTI]

    Douglas, David R.

    2015-09-01

    A separated-orbit bisected energy-recovered linear accelerator apparatus and method. The accelerator includes a first linac, a second linac, and a plurality of arcs of differing path lengths, including a plurality of up arcs, a plurality of downgoing arcs, and a full energy arc providing a path independent of the up arcs and downgoing arcs. The up arcs have a path length that is substantially a multiple of the RF wavelength and the full energy arc includes a path length that is substantially an odd half-integer multiple of the RF wavelength. Operation of the accelerator includes accelerating the beam utilizing the linacs and up arcs until the beam is at full energy, at full energy executing a full recirculation to the second linac using a path length that is substantially an odd half-integer of the RF wavelength, and then decelerating the beam using the linacs and downgoing arcs.

  4. Variable-energy drift-tube linear accelerator

    DOE Patents [OSTI]

    Swenson, D.A.; Boyd, T.J. Jr.; Potter, J.M.; Stovall, J.E.

    A linear accelerator system includes a plurality of post-coupled drift-tubes wherein each post coupler is bistably positionable to either of two positions which result in different field distributions. With binary control over a plurality of post couplers, a significant accumlative effect in the resulting field distribution is achieved yielding a variable-energy drift-tube linear accelerator.

  5. Variable-energy drift-tube linear accelerator

    DOE Patents [OSTI]

    Swenson, Donald A.; Boyd, Jr., Thomas J.; Potter, James M.; Stovall, James E.

    1984-01-01

    A linear accelerator system includes a plurality of post-coupled drift-tubes wherein each post coupler is bistably positionable to either of two positions which result in different field distributions. With binary control over a plurality of post couplers, a significant accumlative effect in the resulting field distribution is achieved yielding a variable-energy drift-tube linear accelerator.

  6. Current trends in non-accelerator particle physics: 1, Neutrino mass and oscillation. 2, High energy neutrino astrophysics. 3, Detection of dark matter. 4, Search for strange quark matter. 5, Magnetic monopole searches

    SciTech Connect (OSTI)

    He, Yudong |

    1995-07-01

    This report is a compilation of papers reflecting current trends in non-accelerator particle physics, corresponding to talks that its author was invited to present at the Workshop on Tibet Cosmic Ray Experiment and Related Physics Topics held in Beijing, China, April 4--13, 1995. The papers are entitled `Neutrino Mass and Oscillation`, `High Energy Neutrino Astrophysics`, `Detection of Dark Matter`, `Search for Strange Quark Matter`, and `Magnetic Monopole Searches`. The report is introduced by a survey of the field and a brief description of each of the author`s papers.

  7. Biological assessments for the low energy demonstration accelerator, 1996

    SciTech Connect (OSTI)

    Cross, S.

    1997-03-01

    This report discusses the biological impact to the area around the Los Alamos National Laboratory of the Low Energy Demonstration Accelerator. In particular the impact to the soils, water quality, vegetation, and wildlife are discussed.

  8. Secretary Moniz Announces Clean Energy Technologies are Accelerating...

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

    Secretary Moniz Announces Clean Energy Technologies are Accelerating in the U.S. ... News Media Contact: (202) 586-4940 DOENews@hq.doe.gov Secretary Moniz Announces Clean ...

  9. Energy recovery experiment could lead way to new accelerators | Jefferson

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

    Lab recovery experiment could lead way to new accelerators One of four BE magnets Corey Butler, mechanical designer; (left to right) Alex Bogacz, CASA staff scientist and experiment co-spokesman; and Robby Hicks, mechanical engineer, stand with one of the four BE magnets and a section of vacuum chamber built by the Machine Shop specifically for the Energy Recovery experiment. Energy recovery experiment could lead way to new accelerators March 6, 2003 Jefferson Lab physicists will soon begin

  10. Fermilab Project X nuclear energy application: Accelerator, spallation target and transmutation technology demonstration

    SciTech Connect (OSTI)

    Gohar, Yousry; Johnson, David; Johnson, Todd; Mishra, Shekhar; /Fermilab

    2011-04-01

    The recent paper 'Accelerator and Target Technology for Accelerator Driven Transmutation and Energy Production' and report 'Accelerators for America's Future' have endorsed the idea that the next generation particle accelerators would enable technological breakthrough needed for nuclear energy applications, including transmutation of waste. In the Fall of 2009 Fermilab sponsored a workshop on Application of High Intensity Proton Accelerators to explore in detail the use of the Superconducting Radio Frequency (SRF) accelerator technology for Nuclear Energy Applications. High intensity Continuous Wave (CW) beam from the Superconducting Radio Frequency (SRF) Linac (Project-X) at beam energy between 1-2 GeV will provide an unprecedented experimental and demonstration facility in the United States for much needed nuclear energy Research and Development. We propose to carry out an experimental program to demonstrate the reliability of the accelerator technology, Lead-Bismuth spallation target technology and a transmutation experiment of spent nuclear fuel. We also suggest that this facility could be used for other Nuclear Energy applications.

  11. Accelerating Clean Energy Adoption (Fact Sheet), Weatherization...

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

    Through efforts like the Weatherization Assistance Program (WAP), the State Energy Program ... Other non-energy benefits to ratepayers, households, and communities comprise the ...

  12. Accelerating energy technology innovation at Cyclotron Road

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

    on goal" for breakthrough energy technology? Critical Need 2 Bridging the lab-to-market gap for clean energy technologies based on breakthrough materials and manufacturing...

  13. Membrane and MEA Accelerated Stress Test Protocols | Department of Energy

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

    and MEA Accelerated Stress Test Protocols Membrane and MEA Accelerated Stress Test Protocols This presentation on fuel cell membrane and MEA stress test protocols was given by T. Benjamin at the High Temperature Membrane Working Group Meeting in May 2007. htmwg_benjamin.pdf (395.65 KB) More Documents & Publications HTMWG, May 18, 2009, Welcome! Automotive Perspective on PEM Evaluation Fuel Cell Tech Team Accelerated Stress Test and Polarization Curve Protocols for PEM Fuel Cells

  14. Accelerating Offshore Wind Development | Department of Energy

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

    Offshore Wind Development Accelerating Offshore Wind Development December 12, 2012 - 2:15pm Addthis Matthew Loveless Matthew Loveless Data Integration Specialist, Office of Public Affairs What does this project do? The 2012 investments support innovative offshore installations for commercial deployment by 2017. The 2011 grants were targeted at projects that aim to either improve the technology used for offshore wind generation or remove the market barriers to offshore wind generation. View the

  15. Cosmic slowing down of acceleration for several dark energy parametrizations

    SciTech Connect (OSTI)

    Magaña, Juan; Cárdenas, Víctor H.; Motta, Verónica E-mail: victor.cardenas@uv.cl

    2014-10-01

    We further investigate slowing down of acceleration of the universe scenario for five parametrizations of the equation of state of dark energy using four sets of Type Ia supernovae data. In a maximal probability analysis we also use the baryon acoustic oscillation and cosmic microwave background observations. We found the low redshift transition of the deceleration parameter appears, independently of the parametrization, using supernovae data alone except for the Union 2.1 sample. This feature disappears once we combine the Type Ia supernovae data with high redshift data. We conclude that the rapid variation of the deceleration parameter is independent of the parametrization. We also found more evidence for a tension among the supernovae samples, as well as for the low and high redshift data.

  16. Detecting Energy Modulation in a Dielectric Laser Accelerator

    SciTech Connect (OSTI)

    Lukaczyk, Louis

    2015-08-21

    The Dielectric Laser Acceleration group at SLAC uses micro-fabricated dielectric grating structures and conventional infrared lasers to accelerator electrons. These structures have been estimated to produce an accelerating gradient up to 2 orders of magnitude greater than that produced by conventional RF accelerators. The success of the experiment depends on both the laser damage threshold of the structure and the timing overlap of femtosecond duration laser pulses with the electron bunch. In recent dielectric laser acceleration experiments, the laser pulse was shorter both temporally and spatially than the electron bunch. As a result, the laser is theorized to have interacted with only a small portion of the electron bunch. The detection of this phenomenon, referred to as partial population modulation, required a new approach to the data analysis of the electron energy spectra. A fitting function was designed to separate the accelerated electron population from the un-accelerated electron population. The approach was unsuccessful in detecting acceleration in the partial population modulation data. However, the fitting functions provide an excellent figure of merit for previous data known to contain signatures of acceleration.

  17. Drift tube suspension for high intensity linear accelerators

    DOE Patents [OSTI]

    Liska, Donald J.; Schamaun, Roger G.; Clark, Donald C.; Potter, R. Christopher; Frank, Joseph A.

    1982-01-01

    The disclosure relates to a drift tube suspension for high intensity linear accelerators. The system comprises a series of box-sections girders independently adjustably mounted on a linear accelerator. A plurality of drift tube holding stems are individually adjustably mounted on each girder.

  18. Drift tube suspension for high intensity linear accelerators

    DOE Patents [OSTI]

    Liska, D.J.; Schamaun, R.G.; Clark, D.C.; Potter, R.C.; Frank, J.A.

    1980-03-11

    The disclosure relates to a drift tube suspension for high intensity linear accelerators. The system comprises a series of box-sections girders independently adjustably mounted on a linear accelerator. A plurality of drift tube holding stems are individually adjustably mounted on each girder.

  19. New INL High Energy Battery Test Facility | Department of Energy

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

    Foro Energy partners with Dept of Energy to commercialize high power lasers for the oil, natural gas, geothermal, and mining industries. photo courtesy of Foro Energy. Foro Energy partners with Dept of Energy to commercialize high power lasers for the oil, natural gas, geothermal, and mining industries. photo courtesy of Foro Energy. The Geothermal Technologies Office (GTO) partners with cutting- edge technology developers to pioneer applications that accelerate the adoption of geothermal

  20. Proposal for the Study of Thermophysical Properties of High-Energy-Density Matter Using Current and Future Heavy-Ion Accelerator Facilities at GSI Darmstadt

    SciTech Connect (OSTI)

    Tahir, N.A.; Spiller, P.; Deutsch, C.; Fortov, V.E.; Gryaznov, V.; Kulish, M.; Lomonosov, I.V.; Mintsev, V.; Nikolaev, D.; Shilkin, N.; Shutov, A.; Ternovoi, V.; Hoffmann, D.H.H.; Ni, P.; Udrea, S.; Varentsov, D.; Piriz, A.R.; Temporal, M.

    2005-07-15

    The subject of high-energy-density (HED) states in matter is of considerable importance to numerous branches of basic as well as applied physics. Intense heavy-ion beams are an excellent tool to create large samples of HED matter in the laboratory with fairly uniform physical conditions. Gesellschaft fuer Schwerionenforschung, Darmstadt, is a unique worldwide laboratory that has a heavy-ion synchrotron, SIS18, that delivers intense beams of energetic heavy ions. Construction of a much more powerful synchrotron, SIS100, at the future international facility for antiprotons and ion research (FAIR) at Darmstadt will lead to an increase in beam intensity by 3 orders of magnitude compared to what is currently available. The purpose of this Letter is to investigate with the help of two-dimensional numerical simulations, the potential of the FAIR to carry out research in the field of HED states in matter.

  1. Accelerating CHP Deployment, United States Energy Association...

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

    endorsed by organizations representing a broad range of America's energy industry. useachpreport.pdf (4.05 MB) More Documents & Publications The International CHPDHC ...

  2. Road Map for Studies to Produce Consistent and High Performance SRF Accelerator Structures

    SciTech Connect (OSTI)

    Ganapati Rao Myneni; John F. OHanlon

    2007-06-20

    Superconducting Radio Frequency (SRF) accelerator structures made from high purity niobium are becoming the technological choice for a large number of future accelerators and energy recovery LINACs (ERL). Most of the presently planned accelerators and ERL requirements will be met with some effort by the current SRF technology where accelerating gradients of about 20 MV/m can be produced on a routine basis with an acceptable yield. However, the XFEL at DESY and the planned ILC require acceleration gradients more than 28 MV/m and 35 MV/m respectively. At the recent ILC meeting at Snowmass (2005) concern was expressed regarding the wide spread in the achieved accelerator gradients and the relatively low yields. For obtaining accelerating gradients of 35 MV/m in SRF accelerator structures consistently, a deeper understanding of the causes for the spread has to be gained and advances have to be made in many scientific and high technology fields, including materials, surface and vacuum sciences, application of reliable processes and procedures, which provide contamination free surfaces and avoid recontamination and cryogenics related technologies. In this contribution a road map for studies needed to produce consistent and high performance SRF accelerator structures from the needed materials development to clean and non-recontaminating processes and procedures will be presented.

  3. U.S. Department of Energy Fermi National Accelerator Laboratory

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy's (DOE's) Fermi National Accelerator Laboratory (Fermilab) has replaced old equipment and reduced energy consumption through a partnership with its electric utility, Commonwealth Edison. Fermilab upgraded the centralized cooling system and separated the system into two segments — a "comfort system" to cool the employee office space and a "process system" for the equipment and accelerators. Backup cooling capacity is provided and cooling can be shifted between the process and comfort systems when necessary. The new 4500-ton cooling system is expected to use 40% less energy and is free of ozone-depleting chlorofluorocarbons (CFCs).

  4. Department of Energy Announces 12 New Projects to Accelerate Technologies

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

    that Improve the Efficiency and Reliability of the U.S. Electric Grid | Department of Energy 12 New Projects to Accelerate Technologies that Improve the Efficiency and Reliability of the U.S. Electric Grid Department of Energy Announces 12 New Projects to Accelerate Technologies that Improve the Efficiency and Reliability of the U.S. Electric Grid December 11, 2015 - 1:33pm Addthis News Media Contact (202) 586-4940 DOENews@hq.doe.gov WASHINGTON- The Energy Department's Advanced Research

  5. Fourth order resonance of a high intensity linear accelerator...

    Office of Scientific and Technical Information (OSTI)

    For a high intensity beam, the 4nu1 resonance of a linear accelerator is manifested through the octupolar term of space charge potential when the depressed phase advance sigma ...

  6. High-energy X-ray imaging of the pulsar wind nebula MSH 1552: constraints on particle acceleration and transport

    SciTech Connect (OSTI)

    An, Hongjun; Kaspi, Victoria M.; Madsen, Kristin K.; Harrison, Fiona A.; Grefenstette, Brian W.; Reynolds, Stephen P.; Boggs, Steven E.; Craig, William W.; Christensen, Finn E.; Fryer, Chris L.; Hailey, Charles J.; Mori, Kaya; Stern, Daniel; Zhang, William W.

    2014-10-01

    We present the first images of the pulsar wind nebula (PWN) MSH 1552 in the hard X-ray band (?8 keV), as measured with the Nuclear Spectroscopic Telescope Array (NuSTAR). Overall, the morphology of the PWN as measured by NuSTAR in the 3-7 keV band is similar to that seen in Chandra high-resolution imaging. However, the spatial extent decreases with energy, which we attribute to synchrotron energy losses as the particles move away from the shock. The hard-band maps show a relative deficit of counts in the northern region toward the RCW 89 thermal remnant, with significant asymmetry. We find that the integrated PWN spectra measured with NuSTAR and Chandra suggest that there is a spectral break at 6 keV, which may be explained by a break in the synchrotron-emitting electron distribution at ?200 TeV and/or imperfect cross calibration. We also measure spatially resolved spectra, showing that the spectrum of the PWN softens away from the central pulsar B150958, and that there exists a roughly sinusoidal variation of spectral hardness in the azimuthal direction. We discuss the results using particle flow models. We find non-monotonic structure in the variation with distance of spectral hardness within 50'' of the pulsar moving in the jet direction, which may imply particle and magnetic-field compression by magnetic hoop stress as previously suggested for this source. We also present two-dimensional maps of spectral parameters and find an interesting shell-like structure in the N {sub H} map. We discuss possible origins of the shell-like structure and their implications.

  7. Michigan Accelerating Technologies (MATch) Energy Grant

    Broader source: Energy.gov [DOE]

    In addition to matching funds, NextEnergy will provide federal funding application services to select companies and universities. For selected companies and universities who go on to win...

  8. Creating Coalitions to Accelerate Clean Energy Technologies

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

    TTC Creates and Manages Emerging Energy Technology Coalitions to: 1. Help companies engage with each other and with stakeholders to: * Remove market barriers * Address business opportunities * Have a voice in government policy * Obtain research and deployment funding 2. Mainstream adoption of new clean and renewable products and business services since 1986 3 Our Current Clients 4 Catalyzing Change for Clean Energy Headquarters 1211 Connecticut Ave NW Suite 600 Washington, DC 20036-5802 United

  9. Energy Department Announces New Private Sector Partnership to Accelerate Renewable Energy Projects

    Office of Energy Efficiency and Renewable Energy (EERE)

    U.S. Energy Secretary Steven Chu today announced the Department of Energy (DOE) will provide up to $750 million in funding from the American Recovery and Reinvestment Act to help accelerate the development of conventional renewable energy generation projects.

  10. Enhancement of maximum attainable ion energy in the radiation pressure acceleration regime using a guiding structure

    SciTech Connect (OSTI)

    Bulanov, S. S.; Esarey, E.; Schroeder, C. B.; Bulanov, S. V.; Esirkepov, T. Zh.; Kando, M.; Pegoraro, F.; Leemans, W. P.

    2015-03-13

    Radiation Pressure Acceleration is a highly efficient mechanism of laser driven ion acceleration, with the laser energy almost totally transferrable to the ions in the relativistic regime. There is a fundamental limit on the maximum attainable ion energy, which is determined by the group velocity of the laser. In the case of a tightly focused laser pulses, which are utilized to get the highest intensity, another factor limiting the maximum ion energy comes into play, the transverse expansion of the target. Transverse expansion makes the target transparent for radiation, thus reducing the effectiveness of acceleration. Utilization of an external guiding structure for the accelerating laser pulse may provide a way of compensating for the group velocity and transverse expansion effects.

  11. Enhancement of maximum attainable ion energy in the radiation pressure acceleration regime using a guiding structure

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

    Bulanov, S. S.; Esarey, E.; Schroeder, C. B.; Bulanov, S. V.; Esirkepov, T. Zh.; Kando, M.; Pegoraro, F.; Leemans, W. P.

    2015-03-13

    Radiation Pressure Acceleration is a highly efficient mechanism of laser driven ion acceleration, with the laser energy almost totally transferrable to the ions in the relativistic regime. There is a fundamental limit on the maximum attainable ion energy, which is determined by the group velocity of the laser. In the case of a tightly focused laser pulses, which are utilized to get the highest intensity, another factor limiting the maximum ion energy comes into play, the transverse expansion of the target. Transverse expansion makes the target transparent for radiation, thus reducing the effectiveness of acceleration. Utilization of an external guidingmore » structure for the accelerating laser pulse may provide a way of compensating for the group velocity and transverse expansion effects.« less

  12. Accelerating the Clean Energy Transition in South Africa | Department of

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

    Energy the Clean Energy Transition in South Africa Accelerating the Clean Energy Transition in South Africa May 28, 2015 - 9:45am Addthis New partnerships between U.S. and South African organizations were recognized during a signing ceremony at the Powering South Africa Conference. From left to right: Jaime Cruz, Millenium Solutions; Edwina Felix, Peer Africa; Carsten Larsen, Dow; Sheila Moynihan, EERE; Bipin Shah, WinBuild; Teresa Scheepers, Municipal Manger of !Khies; Minister Counselor

  13. Relativistic klystron driven compact high gradient accelerator as an injector to an X-ray synchrotron radiation ring

    DOE Patents [OSTI]

    Yu, David U. L.

    1990-01-01

    A compact high gradient accelerator driven by a relativistic klystron is utilized to inject high energy electrons into an X-ray synchrotron radiation ring. The high gradients provided by the relativistic klystron enables accelerator structure to be much shorter (typically 3 meters) than conventional injectors. This in turn enables manufacturers which utilize high energy, high intensity X-rays to produce various devices, such as computer chips, to do so on a cost effective basis.

  14. Saul Perlmutter, Distant Supernovae, Dark Energy, and the Accelerating

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

    Expansion of the Universe Saul Perlmutter, Distant Supernovae, Dark Energy, and the Accelerating Expansion of the Universe Resources with Additional Information * Awards Saul Perlmutter Photo Courtesy of Lawrence Berkeley National Laboratory 'Saul Perlmutter, an astrophysicist at the U.S. Department of Energy's Lawrence Berkeley National Laboratory and a professor of physics at the University of California at Berkeley, has won the 2011 Nobel Prize in Physics "for the discovery of the

  15. Weatherization and Intergovernmental Program - Accelerating Adoption of Energy Efficiency and Renewable Energy

    SciTech Connect (OSTI)

    2010-06-01

    The DOE/EERE Weatherization and Intergovernmental Program (WIP) increases awareness and accelerates adoption of practices and technologies that cost-effectively increase energy efficiency, the use of renewable energy, and oil displacement.

  16. Extending PowerPack for Profiling and Analysis of High Performance Accelerator-Based Systems

    SciTech Connect (OSTI)

    Li, Bo; Chang, Hung-Ching; Song, Shuaiwen; Su, Chun-Yi; Meyer, Timmy; Mooring, John; Cameron, Kirk

    2014-12-01

    Accelerators offer a substantial increase in efficiency for high-performance systems offering speedups for computational applications that leverage hardware support for highly-parallel codes. However, the power use of some accelerators exceeds 200 watts at idle which means use at exascale comes at a significant increase in power at a time when we face a power ceiling of about 20 megawatts. Despite the growing domination of accelerator-based systems in the Top500 and Green500 lists of fastest and most efficient supercomputers, there are few detailed studies comparing the power and energy use of common accelerators. In this work, we conduct detailed experimental studies of the power usage and distribution of Xeon-Phi-based systems in comparison to the NVIDIA Tesla and at SandyBridge.

  17. Wedge Absorbers for Final Cooling for a High-Energy High-Luminosity...

    Office of Scientific and Technical Information (OSTI)

    Research Org: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States) Sponsoring Org: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25) Country of ...

  18. Proton Acceleration: New Developments in Energy Increase, Focusing...

    Office of Scientific and Technical Information (OSTI)

    ... Country of Publication: United States Language: English Subject: 43 PARTICLE ACCELERATORS; ACCELERATION; ACCELERATORS; BRIGHTNESS; FOCUSING; ION BEAMS; ION SOURCES; LASERS; PLASMA; ...

  19. The Office of High Energy Physics Announces the Launch of Its...

    Office of Science (SC) Website

    Community Resources News Archives 2013 The Office of High Energy Physics Announces the Launch of Its New Accelerator R&D Stewardship Webpages High Energy Physics (HEP) HEP ...

  20. High-Isp Mode Of Pulsed Laser-Electromagnetic Hybrid Accelerator For Space Propulsion Applications

    SciTech Connect (OSTI)

    Horisawa, Hideyuki; Kishida, Yoshiaki; Funaki, Ikkoh

    2010-10-08

    A fundamental study of a newly developed rectangular pulsed laser-electromagnetic hybrid thruster was conducted. Laser-ablation plasma in the thruster was induced through laser beam irradiation onto a solid target and accelerated by electrical means instead of direct acceleration only by using a laser beam. The performance of the thrusters was evaluated by measuring the mass shot and impulse bit. As results, significantly high specific impulses up to 7,200 sec were obtained at the charge energies of 8.6 J. In addition, typical thrust efficiency varied between 11.8% and 21.3% depending on the charge energy.

  1. Concept for high-charge-state ion induction accelerators

    SciTech Connect (OSTI)

    Logan, B.G.; Perry, M.D.; Caporaso, G.J.

    1996-11-15

    This work describes a particular concept for ion induction linac accelerators using high-charge-state ions produced by an intense, short pulse laser, and compares the costs of a modular driver system producing 6.5 MJ for a variety of ion masses and charge states using a simple but consistent cost model.

  2. Non-thermal electron acceleration in low Mach number collisionless shocks. I. Particle energy spectra and acceleration mechanism

    SciTech Connect (OSTI)

    Guo, Xinyi; Narayan, Ramesh; Sironi, Lorenzo

    2014-10-20

    Electron acceleration to non-thermal energies in low Mach number (M{sub s} ? 5) shocks is revealed by radio and X-ray observations of galaxy clusters and solar flares, but the electron acceleration mechanism remains poorly understood. Diffusive shock acceleration, also known as first-order Fermi acceleration, cannot be directly invoked to explain the acceleration of electrons. Rather, an additional mechanism is required to pre-accelerate the electrons from thermal to supra-thermal energies, so they can then participate in the Fermi process. In this work, we use two- and three-dimensional particle-in-cell plasma simulations to study electron acceleration in low Mach number shocks. We focus on the particle energy spectra and the acceleration mechanism in a reference run with M{sub s} = 3 and a quasi-perpendicular pre-shock magnetic field. We find that about 15% of the electrons can be efficiently accelerated, forming a non-thermal power-law tail in the energy spectrum with a slope of p ? 2.4. Initially, thermal electrons are energized at the shock front via shock drift acceleration (SDA). The accelerated electrons are then reflected back upstream where their interaction with the incoming flow generates magnetic waves. In turn, the waves scatter the electrons propagating upstream back toward the shock for further energization via SDA. In summary, the self-generated waves allow for repeated cycles of SDA, similarly to a sustained Fermi-like process. This mechanism offers a natural solution to the conflict between the bright radio synchrotron emission observed from the outskirts of galaxy clusters and the low electron acceleration efficiency usually expected in low Mach number shocks.

  3. 9 GeV energy gain in a beam-driven plasma wakefield accelerator...

    Office of Scientific and Technical Information (OSTI)

    9 GeV energy gain in a beam-driven plasma wakefield accelerator Citation Details In-Document Search Title: 9 GeV energy gain in a beam-driven plasma wakefield accelerator An ...

  4. Dielectric-Lined High-Gradient Accelerator Structure

    SciTech Connect (OSTI)

    Jay L. Hirshfield

    2012-04-24

    Rectangular particle accelerator structures with internal planar dielectric elements have been studied, with a view towards devising structures with lower surface fields for a given accelerating field, as compared with structures without dielectrics. Success with this concept is expected to allow operation at higher accelerating gradients than otherwise on account of reduced breakdown probabilities. The project involves studies of RF breakdown on amorphous dielectrics in test cavities that could enable high-gradient structures to be built for a future multi-TeV collider. The aim is to determine what the limits are for RF fields at the surfaces of selected dielectrics, and the resulting acceleration gradient that could be achieved in a working structure. The dielectric of principal interest in this study is artificial CVD diamond, on account of its advertised high breakdown field ({approx}2 GV/m for dc), low loss tangent, and high thermal conductivity. Experimental studies at mm-wavelengths on materials and structures for achieving high acceleration gradient were based on the availability of the 34.3 GHz third-harmonic magnicon amplifier developed by Omega-P, and installed at the Yale University Beam Physics Laboratory. Peak power from the magnicon was measured to be about 20 MW in 0.5 {micro}s pulses, with a gain of 54 dB. Experiments for studying RF high-field effects on CVD diamond samples failed to show any evidence after more than 10{sup 5} RF pulses of RF breakdown up to a tangential surface field strength of 153 MV/m; studies at higher fields were not possible due to a degradation in magnicon performance. A rebuild of the tube is underway at this writing. Computed performance for a dielectric-loaded rectangular accelerator structure (DLA) shows highly competitive properties, as compared with an existing all-metal structure. For example, comparisons were made of a DLA structure having two planar CVD diamond elements with a all-metal CERN structure HDS

  5. Accelerated Climate Modeling for Energy | Argonne Leadership Computing

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

    Facility a Category 5 hurricane simulated by the CESM at 13 km resolution An example of a Category 5 hurricane simulated by the CESM at 13 km resolution. Precipitable water (gray scale) shows the detailed dynamical structure in the flow. Strong precipitation is overlaid in red. High resolution is necessary to simulate reasonable numbers of tropical cyclones including Category 4 and 5 storms. Credit: Alan Scott and Mark Taylor, Sandia National Laboratories Accelerated Climate Modeling for

  6. Accelerated Climate Modeling for Energy | Argonne Leadership Computing

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

    Facility An example of a Category 5 hurricane simulated by the CESM at 13 km resolution An example of a Category 5 hurricane simulated by the CESM at 13 km resolution. Precipitable water (gray scale) shows the detailed dynamical structure in the flow. Strong precipitation is overlaid in red. High resolution is necessary to simulate reasonable numbers of tropical cyclones including Category 4 and 5 storms. Alan Scott and Mark Taylor, Sandia National Laboratories Accelerated Climate Modeling

  7. Enabling cost-effective high-current burst-mode operation in superconducting accelerators

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

    Sheffield, Richard L.

    2015-06-01

    Superconducting (SC) accelerators are very efficient for CW or long-pulse operation, and normal conducting (NC) accelerators are cost effective for short-pulse operation. The addition of a short NC linac section to a SC linac can correct for the energy droop that occurs when pulsed high-current operation is required that exceeds the capability of the klystrons to replenish the cavity RF fields due to the long field fill-times of SC structures, or a requirement to support a broad range of beam currents results in variable beam loading. This paper describes the implementation of this technique to enable microseconds of high beam-current,more » 90 mA or more, in a 12 GeV SC long-pulse accelerator designed for the MaRIE 42-keV XFEL proposed for Los Alamos National Laboratory.« less

  8. Enabling cost-effective high-current burst-mode operation in superconducting accelerators

    SciTech Connect (OSTI)

    Sheffield, Richard L.

    2015-06-01

    Superconducting (SC) accelerators are very efficient for CW or long-pulse operation, and normal conducting (NC) accelerators are cost effective for short-pulse operation. The addition of a short NC linac section to a SC linac can correct for the energy droop that occurs when pulsed high-current operation is required that exceeds the capability of the klystrons to replenish the cavity RF fields due to the long field fill-times of SC structures, or a requirement to support a broad range of beam currents results in variable beam loading. This paper describes the implementation of this technique to enable microseconds of high beam-current, 90 mA or more, in a 12 GeV SC long-pulse accelerator designed for the MaRIE 42-keV XFEL proposed for Los Alamos National Laboratory.

  9. High Energy Physics

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

    Administration | (NNSA) High Energy Density Laboratory Plasmas Program Steady advances in increasing the energy, power, and brightness of lasers and particle beams and advances in pulsed power systems have made possible the exploration of matter at extremely high energy density in the laboratory. Exciting new experimental regimes are being realized by exploiting the scientific capabilities of existing ICF Office facilities, as well as the relevant Department of Defense (DoD) and university

  10. Friedman Sets Sights on Accelerating America's Transition to a Clean Energy

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

    Economy | Department of Energy Friedman Sets Sights on Accelerating America's Transition to a Clean Energy Economy Friedman Sets Sights on Accelerating America's Transition to a Clean Energy Economy July 12, 2016 - 11:48am Addthis David Friedman is the Office of Energy Efficiency and Renewable Energy''s new acting assistant secretary. David Friedman is the Office of Energy Efficiency and Renewable Energy''s new acting assistant secretary. Trish Williams Communications Specialist, EERE

  11. 15 Years of R&D on High Field Accelerator Magnets at FNAL (Journal...

    Office of Scientific and Technical Information (OSTI)

    15 Years of R&D on High Field Accelerator Magnets at FNAL Citation Details In-Document Search Title: 15 Years of R&D on High Field Accelerator Magnets at FNAL The High Field Magnet ...

  12. ACCELERATION OF LOW-ENERGY IONS AT PARALLEL SHOCKS WITH A FOCUSED TRANSPORT MODEL

    SciTech Connect (OSTI)

    Zuo, Pingbing; Zhang, Ming; Rassoul, Hamid K.

    2013-04-10

    We present a test particle simulation on the injection and acceleration of low-energy suprathermal particles by parallel shocks with a focused transport model. The focused transport equation contains all necessary physics of shock acceleration, but avoids the limitation of diffusive shock acceleration (DSA) that requires a small pitch angle anisotropy. This simulation verifies that the particles with speeds of a fraction of to a few times the shock speed can indeed be directly injected and accelerated into the DSA regime by parallel shocks. At higher energies starting from a few times the shock speed, the energy spectrum of accelerated particles is a power law with the same spectral index as the solution of standard DSA theory, although the particles are highly anisotropic in the upstream region. The intensity, however, is different from that predicted by DSA theory, indicating a different level of injection efficiency. It is found that the shock strength, the injection speed, and the intensity of an electric cross-shock potential (CSP) jump can affect the injection efficiency of the low-energy particles. A stronger shock has a higher injection efficiency. In addition, if the speed of injected particles is above a few times the shock speed, the produced power-law spectrum is consistent with the prediction of standard DSA theory in both its intensity and spectrum index with an injection efficiency of 1. CSP can increase the injection efficiency through direct particle reflection back upstream, but it has little effect on the energetic particle acceleration once the speed of injected particles is beyond a few times the shock speed. This test particle simulation proves that the focused transport theory is an extension of DSA theory with the capability of predicting the efficiency of particle injection.

  13. Direct High-Power Laser Acceleration of Ions for Medical Applications

    SciTech Connect (OSTI)

    Salamin, Yousef I.; Harman, Zoltan; Keitel, Christoph H.

    2008-04-18

    Theoretical investigations show that linearly and radially polarized multiterawatt and petawatt laser beams, focused to subwavelength waist radii, can directly accelerate protons and carbon nuclei, over micron-size distances, to the energies required for hadron cancer therapy. Ions accelerated by radially polarized lasers have generally a more favorable energy spread than those accelerated by linearly polarized lasers of the same intensity.

  14. Accelerated weight histogram method for exploring free energy landscapes

    SciTech Connect (OSTI)

    Lindahl, V.; Lidmar, J.; Hess, B.

    2014-07-28

    Calculating free energies is an important and notoriously difficult task for molecular simulations. The rapid increase in computational power has made it possible to probe increasingly complex systems, yet extracting accurate free energies from these simulations remains a major challenge. Fully exploring the free energy landscape of, say, a biological macromolecule typically requires sampling large conformational changes and slow transitions. Often, the only feasible way to study such a system is to simulate it using an enhanced sampling method. The accelerated weight histogram (AWH) method is a new, efficient extended ensemble sampling technique which adaptively biases the simulation to promote exploration of the free energy landscape. The AWH method uses a probability weight histogram which allows for efficient free energy updates and results in an easy discretization procedure. A major advantage of the method is its general formulation, making it a powerful platform for developing further extensions and analyzing its relation to already existing methods. Here, we demonstrate its efficiency and general applicability by calculating the potential of mean force along a reaction coordinate for both a single dimension and multiple dimensions. We make use of a non-uniform, free energy dependent target distribution in reaction coordinate space so that computational efforts are not wasted on physically irrelevant regions. We present numerical results for molecular dynamics simulations of lithium acetate in solution and chignolin, a 10-residue long peptide that folds into a β-hairpin. We further present practical guidelines for setting up and running an AWH simulation.

  15. Accelerating Particles with Plasma

    SciTech Connect (OSTI)

    Litos, Michael; Hogan, Mark

    2014-11-05

    Researchers at SLAC explain how they use plasma wakefields to accelerate bunches of electrons to very high energies over only a short distance. Their experiments offer a possible path for the future of particle accelerators.

  16. Interaction of an ultrarelativistic electron bunch train with a W-band accelerating structure: High power and high gradient

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

    Wang, D.; Antipov, S.; Jing, C.; Power, J. G.; Conde, M.; Wisniewski, E.; Liu, W.; Qiu, J.; Ha, G.; Dolgashev, V.; et al

    2016-02-05

    Electron beam interaction with high frequency structures (beyond microwave regime) has a great impact on future high energy frontier machines. We report on the generation of multimegawatt pulsed rf power at 91 GHz in a planar metallic accelerating structure driven by an ultrarelativistic electron bunch train. This slow-wave wakefield device can also be used for high gradient acceleration of electrons with a stable rf phase and amplitude which are controlled by manipulation of the bunch train. To achieve precise control of the rf pulse properties, a two-beam wakefield interferometry method was developed in which the rf pulse, due to themore » interference of the wakefields from the two bunches, was measured as a function of bunch separation. As a result, measurements of the energy change of a trailing electron bunch as a function of the bunch separation confirmed the interferometry method.« less

  17. On the feasibility of increasing the energy of laser-accelerated protons by using low-density targets

    SciTech Connect (OSTI)

    Brantov, A. V. Bychenkov, V. Yu.

    2015-06-15

    Optimal regimes of proton acceleration in the interaction of short high-power laser pulses with thin foils and low-density targets are determined by means of 3D numerical simulation. It is demonstrated that the maximum proton energy can be increased by using low-density targets in which ions from the front surface of the target are accelerated most efficiently. It is shown using a particular example that, for the same laser pulse, the energy of protons accelerated from a low-density target can be increased by one-third as compared to a solid-state target.

  18. Advanced Klystrons for High Efficiency Accelerator Systems - Final Report

    SciTech Connect (OSTI)

    Read, Michael; Ives, Robert Lawrence

    2014-03-26

    This program explored tailoring of RF pulses used to drive accelerator cavities. Simulations indicated that properly shaping the pulse risetime to match accelerator cavity characteristics reduced reflected power and increased total efficiency. Tailoring the pulse requires a high power, gridded, klystron to shape the risetime while also controlling the beam current. The Phase I program generated a preliminary design of a gridded electron gun for a klystron producing 5-10 MW of RF power. This required design of a segmented cathode using Controlled Porosity Reservoir cathodes to limit power deposition on the grid. The program was successful in computationally designing a gun producing a high quality electron beam with grid control. Additional analysis of pulse tailoring indicated that technique would only be useful for cavity drive pulses that were less than approximately 2-3 times the risetime. Otherwise, the efficiency gained during the risetime of the pulse became insignificant when considering the efficiency over the entire pulse. Consequently, it was determined that a Phase II program would not provide sufficient return to justify the cost. Never the less, other applications for a high power gridded gun are currently being pursued. This klystron, for example, would facilitate development inverse Comptom x-ray sources by providing a high repetition rate (10 -100 kHz) RF source.

  19. Fermilab | Science | Particle Accelerators | Fermilab's Accelerator Complex

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

    Fermilab's Accelerator Complex photo Fermilab's accelerator complex comprises seven particle accelerators and storage rings. It produces the world's most powerful, high-energy neutrino beam and provides proton beams for various experiments and R&D programs. Fermilab's accelerator complex delivers high-intensity neutrino beams and provides optimal beam for a broad range of new and existing experiments, including the Deep Underground Neutrino Experiment, Muon g-2 and Mu2e. Fermilab's

  20. High-energy cosmic ray interactions

    SciTech Connect (OSTI)

    Engel, Ralph; Orellana, Mariana; Reynoso, Matias M.; Vila, Gabriela S.

    2009-04-30

    Research into hadronic interactions and high-energy cosmic rays are closely related. On one hand--due to the indirect observation of cosmic rays through air showers--the understanding of hadronic multiparticle production is needed for deriving the flux and composition of cosmic rays at high energy. On the other hand the highest energy particles from the universe allow us to study the characteristics of hadronic interactions at energies far beyond the reach of terrestrial accelerators. This is the summary of three introductory lectures on our current understanding of hadronic interactions of cosmic rays.

  1. Electromagnetic Design of RF Cavities for Accelerating Low-Energy Muons

    SciTech Connect (OSTI)

    Kurennoy, Sergey S.

    2012-05-14

    A high-gradient linear accelerator for accelerating low-energy muons and pions in a strong solenoidal magnetic field has been proposed for homeland defense and industrial applications. The acceleration starts immediately after collection of pions from a target in a solenoidal magnetic field and brings decay muons, which initially have kinetic energies mostly around 15-20 MeV, to 200 MeV over a distance of {approx}10 m. At this energy, both ionization cooling and further, more conventional acceleration of the muon beam become feasible. A normal-conducting linac with external-solenoid focusing can provide the required large beam acceptances. The linac consists of independently fed zero-mode (TM{sub 010}) RF cavities with wide beam apertures closed by thin conducting edge-cooled windows. Electromagnetic design of the cavity, including its RF coupler, tuning and vacuum elements, and field probes, has been developed with the CST MicroWave Studio, and is presented.

  2. 15 Years of R&D on High Field Accelerator Magnets at FNAL (Journal...

    Office of Scientific and Technical Information (OSTI)

    15 Years of R&D on High Field Accelerator Magnets at FNAL Citation Details In-Document Search Title: 15 Years of R&D on High Field Accelerator Magnets at FNAL You are accessing ...

  3. Design and Optimization of Large Accelerator Systems through High-Fidelity Electromagnetic Simulations

    SciTech Connect (OSTI)

    Ng, Cho; Akcelik, Volkan; Candel, Arno; Chen, Sheng; Ge, Lixin; Kabel, Andreas; Lee, Lie-Quan; Li, Zenghai; Prudencio, Ernesto; Schussman, Greg; Uplenchwar1, Ravi; Xiao1, Liling; Ko1, Kwok; Austin, T.; Cary, J.R.; Ovtchinnikov, S.; Smith, D.N.; Werner, G.R.; Bellantoni, L.; /SLAC /TechX Corp. /Fermilab

    2008-08-01

    SciDAC1, with its support for the 'Advanced Computing for 21st Century Accelerator Science and Technology' (AST) project, witnessed dramatic advances in electromagnetic (EM) simulations for the design and optimization of important accelerators across the Office of Science. In SciDAC2, EM simulations continue to play an important role in the 'Community Petascale Project for Accelerator Science and Simulation' (ComPASS), through close collaborations with SciDAC CETs/Institutes in computational science. Existing codes will be improved and new multi-physics tools will be developed to model large accelerator systems with unprecedented realism and high accuracy using computing resources at petascale. These tools aim at targeting the most challenging problems facing the ComPASS project. Supported by advances in computational science research, they have been successfully applied to the International Linear Collider (ILC) and the Large Hadron Collider (LHC) in High Energy Physics (HEP), the JLab 12-GeV Upgrade in Nuclear Physics (NP), as well as the Spallation Neutron Source (SNS) and the Linac Coherent Light Source (LCLS) in Basic Energy Sciences (BES).

  4. High Gradient Accelerator Cavities Using Atomic Layer Deposition

    SciTech Connect (OSTI)

    Ives, Robert Lawrence; Parsons, Gregory; Williams, Philip; Oldham, Christopher; Mundy, Zach; Dolgashev, Valery

    2014-12-09

    In the Phase I program, Calabazas Creek Research, Inc. (CCR), in collaboration with North Carolina State University (NCSU), fabricated copper accelerator cavities and used Atomic Layer Deposition (ALD) to apply thin metal coatings of tungsten and platinum. It was hypothesized that a tungsten coating would provide a robust surface more resistant to arcing and arc damage. The platinum coating was predicted to reduce processing time by inhibiting oxides that form on copper surfaces soon after machining. Two sets of cavity parts were fabricated. One was coated with 35 nm of tungsten, and the other with approximately 10 nm of platinum. Only the platinum cavity parts could be high power tested during the Phase I program due to schedule and funding constraints. The platinum coated cavity exhibit poor performance when compared with pure copper cavities. Not only did arcing occur at lower power levels, but the processing time was actually longer. There were several issues that contributed to the poor performance. First, machining of the base copper cavity parts failed to achieve the quality and cleanliness standards specified to SLAC National Accelerator Center. Secondly, the ALD facilities were not configured to provide the high levels of cleanliness required. Finally, the nanometer coating applied was likely far too thin to provide the performance required. The coating was ablated or peeled from the surface in regions of high fields. It was concluded that the current ALD process could not provide improved performance over cavities produced at national laboratories using dedicated facilities.

  5. Friedman Sets Sights on Accelerating America's Transition to a Clean Energy

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

    Economy | Department of Energy Friedman Sets Sights on Accelerating America's Transition to a Clean Energy Economy Friedman Sets Sights on Accelerating America's Transition to a Clean Energy Economy July 22, 2016 - 9:45am Addthis The Office of Energy Efficiency and Renewable Energy (EERE) has a new acting assistant secretary in David Friedman who plans to continue to support EERE’s clean energy revolution and help strengthen its innovation ecosystem. The Office of Energy Efficiency and

  6. COMBINED MODELING OF ACCELERATION, TRANSPORT, AND HYDRODYNAMIC...

    Office of Scientific and Technical Information (OSTI)

    Title: COMBINED MODELING OF ACCELERATION, TRANSPORT, AND HYDRODYNAMIC RESPONSE IN SOLAR FLARES. I. THE NUMERICAL MODEL Acceleration and transport of high-energy particles and fluid ...

  7. Technology requirements for high-power Lithium Lorentz Force accelerators

    SciTech Connect (OSTI)

    Polk, J.; Frisbee, R.; Krauthamer, S.; Tikhonov, V.; Semenikhin, S.; Kim, V.

    1997-01-01

    Lithium Lorentz Force Accelerators (LFA{close_quote}s) are capable of processing very high power levels and are therefore applicable to a wide range of challenging missions. An analysis of a reusable orbit transfer vehicle with a solar or nuclear electric power source was performed to assess the applicability of high-power LFA{close_quote}s to this mission and to define engine performance and lifetime goals to help guide the technology development program. For this class of missions, the emphasis must be on achieving high efficiency at an Isp of 4000{endash}5000 s at power levels of 200{endash}250 kWe. The engines must demonstrate very reliable operation for a service life of about 3000 hours. These goals appear to be achievable with engine technologies currently under development. {copyright} {ital 1997 American Institute of Physics.}

  8. Cosmic acceleration without dark energy: background tests and thermodynamic analysis

    SciTech Connect (OSTI)

    Lima, J.A.S.; Graef, L.L.; Pavn, D.; Basilakos, Spyros E-mail: leilagraef@usp.br E-mail: svasil@academyofathens.gr

    2014-10-01

    A cosmic scenario with gravitationally induced particle creation is proposed. In this model the Universe evolves from an early to a late time de Sitter era, with the recent accelerating phase driven only by the negative creation pressure associated with the cold dark matter component. The model can be interpreted as an attempt to reduce the so-called cosmic sector (dark matter plus dark energy) and relate the two cosmic accelerating phases (early and late time de Sitter expansions). A detailed thermodynamic analysis including possible quantum corrections is also carried out. For a very wide range of the free parameters, it is found that the model presents the expected behavior of an ordinary macroscopic system in the sense that it approaches thermodynamic equilibrium in the long run (i.e., as it nears the second de Sitter phase). Moreover, an upper bound is found for the GibbonsHawking temperature of the primordial de Sitter phase. Finally, when confronted with the recent observational data, the current 'quasi'-de Sitter era, as predicted by the model, is seen to pass very comfortably the cosmic background tests.

  9. High-energy detector

    DOE Patents [OSTI]

    Bolotnikov, Aleksey E.; Camarda, Giuseppe; Cui, Yonggang; James, Ralph B.

    2011-11-22

    The preferred embodiments are directed to a high-energy detector that is electrically shielded using an anode, a cathode, and a conducting shield to substantially reduce or eliminate electrically unshielded area. The anode and the cathode are disposed at opposite ends of the detector and the conducting shield substantially surrounds at least a portion of the longitudinal surface of the detector. The conducting shield extends longitudinally to the anode end of the detector and substantially surrounds at least a portion of the detector. Signals read from one or more of the anode, cathode, and conducting shield can be used to determine the number of electrons that are liberated as a result of high-energy particles impinge on the detector. A correction technique can be implemented to correct for liberated electron that become trapped to improve the energy resolution of the high-energy detectors disclosed herein.

  10. About Accelerators | Jefferson Lab

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

    About Accelerators Jefferson Lab is home to two superconducting radiofrequency accelerators: the Continuous Electron Beam Accelerator Facility and the Free-Electron Laser. The CEBAF accelerator is a unique accelerator used to conduct investigations in the field of nuclear physics. It provides high-current, medium-energy electron beams concurrently to three experimental halls for the study of quarks and gluons, protons and neutrons and the nucleus of the atom. The Jefferson Lab Free-Electron

  11. High Energy Physics | Argonne National Laboratory

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

    Accelerator Technology Taking collider physics to higher energies More ATLAS at the LHC Colliding protons to learn about universal forces More Cosmology & Astrophysics Looking at the dawn and evolution of the universe More Instrumentation Innovative detectors for next-generation experiments More Precision Muon Physics Muons as a probe for new physics More Neutrino Physics Studying the elusive, but second most abundant particle in the universe More Theoretical High Energy Physics Motivating

  12. High Energy Physics | Argonne National Laboratory

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

    News & Events Upcoming Events Press Releases Feature Stories In the News Videos Downloads About HEP at Work Career Opportunities Staff Directory About HEP at Work Career Opportunities Staff Directory Argonne National Laboratory High Energy Physics Research Facilities Capabilities Initiatives Publications News & Events Accelerator Technology Taking collider physics to higher energies More ATLAS at the LHC Colliding protons to learn about universal forces More Cosmology & Astrophysics

  13. Future high energy colliders symposium. Summary report

    SciTech Connect (OSTI)

    Parsa, Z. |

    1996-12-31

    A `Future High Energy Colliders` Symposium was held October 21-25, 1996 at the Institute for Theoretical Physics (ITP) in Santa Barbara. This was one of the 3 symposia hosted by the ITP and supported by its sponsor, the National Science Foundation, as part of a 5 month program on `New Ideas for Particle Accelerators`. The long term program and symposia were organized and coordinated by Dr. Zohreh Parsa of Brookhaven National Laboratory/ITP. The purpose of the symposium was to discuss the future direction of high energy physics by bringing together leaders from the theoretical, experimental and accelerator physics communities. Their talks provided personal perspectives on the physics objectives and the technology demands of future high energy colliders. Collectively, they formed a vision for where the field should be heading and how it might best reach its objectives.

  14. Utilization of accelerators for transmutation and energy production

    SciTech Connect (OSTI)

    Sheffield, Richard L

    2010-09-24

    Given the increased concern over reliable, emission-free power, nuclear power has experienced a resurgence of interest. A sub-critical accelerator driven system (ADS) can drive systems that have either safety constraints (waste transmutation) or reduced fissile content (thorium reactor). The goals of ADS are some or all of the following: (1) to significantly reduce the generation or impacts due to the minor actinides on the packing density and long-term radiotoxicity in the repository design, (2) preserve/use the energy-rich component of used nuclear fuel, and (3) reduce proliferation risk. ADS systems have been actively studied in Europe and Asia over the past two decades and renewed interest is occurring in the U.S. This talk will cover some of the history, possible applicable fuel cycle scenarios, and general issues to be considered in implementing ADS systems.

  15. Solar Technology Acceleration Centre SolarTAC | Open Energy Informatio...

    Open Energy Info (EERE)

    Acceleration Centre SolarTAC Jump to: navigation, search Name: Solar Technology Acceleration Centre (SolarTAC) Product: US-based JV formed with a consortium of six public and...

  16. Accelerating Innovation: We Do It Together | Department of Energy

    Energy Savers [EERE]

    Accelerating Innovation: We Do It Together Accelerating Innovation: We Do It Together January 22, 2015 - 2:06pm Addthis January 22, 2015 The debut of a 3D printed car, an EV ...

  17. Lab Breakthrough: Fermilab Accelerator Technology | Department of Energy

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

    Fermilab Accelerator Technology Lab Breakthrough: Fermilab Accelerator Technology May 14, 2012 - 10:51am Addthis At Fermilab, scientists are collaborating with other laboratories and industry to optimize the manufacturing processes for a new type of powerful accelerator that uses superconducting niobium cavities. Michael Hess Michael Hess Former Digital Communications Specialist, Office of Public Affairs Where are these 30,000 particle accelerators? Most of them in medicine and manufacturing

  18. Accelerating the Reduction of Excess Russian Highly Enriched Uranium

    SciTech Connect (OSTI)

    Benton, J; Wall, D; Parker, E; Rutkowski, E

    2004-02-18

    This paper presents the latest information on one of the Accelerated Highly Enriched Uranium (HEU) Disposition initiatives that resulted from the May 2002 Summit meeting between Presidents George W. Bush and Vladimir V. Putin. These initiatives are meant to strengthen nuclear nonproliferation objectives by accelerating the disposition of nuclear weapons-useable materials. The HEU Transparency Implementation Program (TIP), within the National Nuclear Security Administration (NNSA) is working to implement one of the selected initiatives that would purchase excess Russian HEU (93% 235U) for use as fuel in U.S. research reactors over the next ten years. This will parallel efforts to convert the reactors' fuel core from HEU to low enriched uranium (LEU) material, where feasible. The paper will examine important aspects associated with the U.S. research reactor HEU purchase. In particular: (1) the establishment of specifications for the Russian HEU, and (2) transportation safeguard considerations for moving the HEU from the Mayak Production Facility in Ozersk, Russia, to the Y-12 National Security Complex in Oak Ridge, TN.

  19. Energy Storage Testing and Analysis High Power and High Energy...

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

    Testing and Analysis High Power and High Energy Development Energy Storage Testing and ... Testing Overview and Progress of the Battery Testing, Analysis, and Design Activity ...

  20. High Performance Colloidal Nanocrystals | Department of Energy

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

    Energy Through the High Penetration Solar Deployment program, DOE is funding solar projects that are accelerating the placement of solar photovoltaic (PV) systems into existing and newly designed distribution circuits in the electrical grid. The High Penetration Solar Deployment projects are working with teams that include utility partners to model, test, and evaluate solutions to mitigate the impact of large amounts of PV-generated electricity on the reliability and stability of the

  1. Long pulse acceleration of MeV class high power density negative H{sup −} ion beam for ITER

    SciTech Connect (OSTI)

    Umeda, N. Kojima, A.; Kashiwagi, M.; Tobari, H.; Hiratsuka, J.; Watanabe, K.; Dairaku, M.; Yamanaka, H.; Hanada, M.

    2015-04-08

    R and D of high power density negative ion beam acceleration has been carried out at MeV test facility in JAEA to realize ITER neutral beam accelerator. The main target is H{sup −} ion beam acceleration up to 1 MeV with 200 A/m{sup 2} for 60 s whose pulse length is the present facility limit. For long pulse acceleration at high power density, new extraction grid (EXG) has been developed with high cooling capability, which electron suppression magnet is placed under cooling channel similar to ITER. In addition, aperture size of electron suppression grid (ESG) is enlarged from 14 mm to 16 mm to reduce direct interception on the ESG and emission of secondary electron which leads to high heat load on the upstream acceleration grid. By enlarging ESG aperture, beam current increased 10 % at high current beam and total acceleration grid heat load reduced from 13 % to 10 % of input power at long pulse beam. In addition, heat load by back stream positive ion into the EXG is measured for the first time and is estimated as 0.3 % of beam power, while heat load by back stream ion into the source chamber is estimated as 3.5 ~ 4.0 % of beam power. Beam acceleration up to 60 s which is the facility limit, has achieved at 683 keV, 100 A/m{sup 2} of negative ion beam, whose energy density increases two orders of magnitude since 2011.

  2. Channeling and dechanneling at high energy

    SciTech Connect (OSTI)

    Carrigan, R.A. Jr.

    1987-09-30

    The possibility of using channeling as a tool for high energy particle physics has now been extensively investigated. Bent crystals have been used as an accelerator extraction element and for particle deflection. Applications as accelerating devices have been discussed but appear remote. The major advantage in using a bent crystal rather than a magnet is the large deflection that can be achieved in a short length. The major disadvantage is the low transmission. A good understanding of dechanneling is important for applications. 43 refs., 1 fig., 3 tabs.

  3. Examination of Beryllium Under Intense High Energy Proton Beam...

    Office of Scientific and Technical Information (OSTI)

    Examination of Beryllium Under Intense High Energy Proton Beam at CERN's HiRadMat Facility ... 6th International Particle Accelerator Conference. Richmond, Virginia, USA, 3-8 May 2015.

  4. Large Scale Computing and Storage Requirements for High Energy...

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

    for High Energy Physics Accelerator Physics P. Spentzouris, Fermilab Motivation ... Project-X http:www.er.doe.govhepHEPAPreportsP5Report%2006022008.pdf ComPASS The SciDAC2 ...

  5. High Energy Cost Grants | Department of Energy

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

    High Energy Cost Grants High Energy Cost Grants The High Energy Cost Grant Program provides financial assistance for the improvement of energy generation, transmission, and distribution facilities servicing eligible rural communities with home energy costs that are over 275% of the national average. Grants under this program may be used for the acquisition, construction, installation, repair, replacement, or improvement of energy generation, transmission, or distribution facilities in

  6. Modified Magnicon for High-Gradient Accelerator R&D

    SciTech Connect (OSTI)

    Jay L. Hirshfield

    2011-12-19

    Analysis, and low-power cold tests are described on a modified design intended for the Ka-band pulsed magnicon now in use for high-gradient accelerator R and D and rare elementary particle searches at the Yale University Beam Physics Laboratory. The modification is mainly to the output cavity of the magnicon, which presently operates in the TM310 mode. It is proposed to substitute for this a dual-chamber TE311 cavity structure. The first chamber is to extract about 40% of the beam power (about 25 MW) at 34.272 GHz, while the second chamber is to convey the power to four WR-28 output waveguides. Minor design changes are also proposed for the penultimate 11.424 GHz cavity and the beam collector. The intention of these design changes is to allow the magnicon to operate reliably 24/7, with minor sensitivity to operating parameters.

  7. 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.

  8. Beam Dynamics Studies and the Design, Fabrication and Testing of Superconducting Radiofrequency Cavity for High Intensity Proton Accelerator

    SciTech Connect (OSTI)

    Saini, Arun

    2012-03-01

    The application horizon of particle accelerators has been widening significantly in recent decades. Where large accelerators have traditionally been the tools of the trade for high-energy nuclear and particle physics, applications in the last decade have grown to include large-scale accelerators like synchrotron light sources and spallation neutron sources. Applications like generation of rare isotopes, transmutation of nuclear reactor waste, sub-critical nuclear power, generation of neutrino beams etc. are next area of investigation for accelerator scientific community all over the world. Such applications require high beam power in the range of few mega-watts (MW). One such high intensity proton beam facility is proposed at Fermilab, Batavia, US, named as Project-X. Project-X facility is based on H- linear accelerator (linac), which will operate in continuous wave (CW) mode and accelerate H- ion beam with average current of 1 mA from kinetic energy of 2.5 MeV to 3 GeV to deliver 3MW beam power. One of the most challenging tasks of the Project-X facility is to have a robust design of the CW linac which can provide high quality beam to several experiments simultaneously. Hence a careful design of linac is important to achieve this objective.

  9. BEST OFFER EVER ACCELERATED TEXAS UPGRADES | Department of Energy

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

    BEST OFFER EVER ACCELERATED TEXAS UPGRADES BEST OFFER EVER ACCELERATED TEXAS UPGRADES BEST OFFER EVER ACCELERATED TEXAS UPGRADES In Austin, Texas, air conditioners hum constantly from April to October, which creates a powerful opportunity to eliminate air leaks in homes and other buildings. That's also why contractors often find themselves with more than enough work during some months of the year but are quite slow in others, often resulting in layoffs. To tackle this challenge, municipal

  10. Accelerating Innovation: We Do It Together | Department of Energy

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

    We Do It Together Accelerating Innovation: We Do It Together January 22, 2015 - 3:00pm Addthis Accelerating Innovation: We Do It Together -Mark Johnson, Director, Advanced Manufacturing Office The debut of a 3D printed car, an EV version of the 50th anniversary Shelby Cobra, this week at the Detroit Auto Show is a big win for manufacturing innovation. Accelerating innovation is about meeting big technical challenges and addressing the challenge in a short time frame. Developing new manufacturing

  11. Offshore Wind Market Acceleration Projects | Department of Energy

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

    Offshore Wind » Offshore Wind Market Acceleration Projects Offshore Wind Market Acceleration Projects The program supports market acceleration projects intended to mitigate market barriers to the development of the U.S. offshore wind market. These projects address both environmental and supply chain-related issues, and are broken down into seven categories: Wind resource characterization and design conditions Environmental surveys, monitoring tools, and resources Electromagnetic interference

  12. RF-Based Accelerators for HEDP Research (Conference) | SciTech...

    Office of Scientific and Technical Information (OSTI)

    Title: RF-Based Accelerators for HEDP Research Accelerator-driven High-Energy Density ... RF-based acceleration may be a viable alternative with recent breakthroughs in ...

  13. Report: U.S. Military Accelerates Deployment of Clean Energy...

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

    is accelerating across military installations operated by the U.S. Department of Defense, according to a report released January 16 by The Pew Charitable Trusts. 'Power...

  14. Theoretical High Energy Physics

    SciTech Connect (OSTI)

    Christ, Norman H.; Weinberg, Erick J.

    2014-07-14

    we provide reports from each of the six faculty supported by the Department of Energy High Energy Physics Theory grant at Columbia University. Each is followed by a bibliography of the references cited. A complete list of all of the publications in the 12/1/2010-04/30/2014 period resulting from research supported by this grant is provided in the following section. The final section lists the Ph.D. dissertations based on research supported by the grant that were submitted during this period.

  15. 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 (<1μm) 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.

  16. 15 Years of R&D on high field accelerator magnets at FNAL

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

    Barzi, Emanuela; Zlobin, Alexander V.

    2016-07-01

    The High Field Magnet (HFM) Program at Fermi National Accelerator Laboratory (FNAL) has been developing Nb3Sn superconducting magnets, materials and technologies for present and future particle accelerators since the late 1990s. This paper summarizes the main results of the Nb3Sn accelerator magnet and superconductor R&D at FNAL and outlines the Program next steps.

  17. U.S. Department of Energy and India Partner to Advance Accelerator and

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

    Particle Detector Research and Development | Department of Energy India Partner to Advance Accelerator and Particle Detector Research and Development U.S. Department of Energy and India Partner to Advance Accelerator and Particle Detector Research and Development July 25, 2011 - 3:22pm Addthis WASHINGTON DC - The U.S. Department of Energy (DOE) today announced that it has signed an agreement with the Indian Department of Atomic Energy (DAE) to help advance scientific discovery in the field

  18. High frequency energy measurements

    SciTech Connect (OSTI)

    Stotlar, S.C.

    1981-01-01

    High-frequency (> 100 MHz) energy measurements present special problems to the experimenter. Environment or available electronics often limit the applicability of a given detector type. The physical properties of many detectors are frequency dependent and in some cases, the physical effect employed can be frequency dependent. State-of-the-art measurements generally involve a detection scheme in association with high-speed electronics and a method of data recording. Events can be single or repetitive shot requiring real time, sampling, or digitizing data recording. Potential modification of the pulse by the detector and the associated electronics should not be overlooked. This presentation will review typical applications, methods of choosing a detector, and high-speed detectors. Special considerations and limitations of some applications and devices will be described.

  19. Plasma Wakefield Acceleration: How it Works

    SciTech Connect (OSTI)

    2014-11-05

    This animation explains how electrons can be efficiently accelerated to high energy using wakes created in a plasma.

  20. High Performance Energy Management

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

    Performance Energy Management Reduce energy use and meet your business objectives By applying continuous improvement practices similar to Lean and Six Sigma, the BPA Energy Smart...

  1. Sandia Energy - High Performance Computing

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

    High Performance Computing Home Energy Research Advanced Scientific Computing Research (ASCR) High Performance Computing High Performance Computingcwdd2015-03-18T21:41:24+00:00...

  2. Accelerated Light Aging of PV Encapsulants | Department of Energy

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

    Correlation of Xenon Arc and Mirror Accelerated Outdoor Aging from 1993-1997 PDF icon pvmrw13uvthstrreid.pdf More Documents & Publications Literature Review of the Effects of UV ...

  3. Sprints Accelerate Research - Joint Center for Energy Storage Research

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

    October 1, 2015, News Articles Sprints Accelerate Research TimberImage(post.get_field('image')).alt In October 2014, we introduced "Sprints" to accelerate research and meet our goal of developing two battery prototypes, one for transportation and the other for the grid. Each Sprint begins with the identification of a critical scientific question for prototype development that must be answered within a few month timeframe, and the formation of the right team of scientists and engineers

  4. Accelerated Aging of Roofing Materials | Department of Energy

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

    Accelerated Aging of Roofing Materials Accelerated Aging of Roofing Materials 1 of 2 Berkeley Lab Heat Island Group chemist Mohamad Sleiman prepares to insert clean and soiled roofing specimens into a weatherometer. The weatherometer simulates exposure to heat, moisture, and UV radiation. Image: Heat Island Group, Lawrence Berkeley National Laboratory 2 of 2 Berkeley Lab Heat Island Group chemist Mohamad Sleiman configures a weatherometer to simulate the effects of heat, moisture, and UV

  5. Multi-scale framework for the accelerated design of high-efficiency...

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

    Multi-scale framework for the accelerated design of high-efficiency organic photovoltaic cells Organic and hybrid organicinorganic solar cells (OSC) offer a promising low-cost...

  6. High Mesa | Open Energy Information

    Open Energy Info (EERE)

    High Mesa Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Exelon Wind Developer Exelon Wind Energy Purchaser Idaho Power Location...

  7. Energy Department Announces $12 Million to Accelerate Record-Breaking Solar

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

    Cell Efficiency | Department of Energy 2 Million to Accelerate Record-Breaking Solar Cell Efficiency Energy Department Announces $12 Million to Accelerate Record-Breaking Solar Cell Efficiency January 25, 2013 - 3:41pm Addthis As part of the Energy Department's SunShot Initiative, the Department today announced $12 million to develop innovative, ultra-efficient solar devices that will close the gap with the theoretical efficiency limit, or the highest potential percentage of sunlight

  8. Sustainable Transportation: Accelerating Widespread Adoption of Energy Efficient Vehicles & Fuels (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2014-12-01

    While energy efficient transportation strategies have the potential to simultaneously slash oil consumption and reduce greenhouse gas (GHG) emissions, a truly sustainable solution will require more than just putting drivers behind the wheels of new fuel-efficient cars. As the only national laboratory dedicated 100% to renewable energy and energy efficiency, the National Renewable Energy Laboratory (NREL) accelerates widespread adoption of high-performance, low-emission, energy-efficient passenger and freight vehicles, as well as alternative fuels and related infrastructure. Researchers collaborate closely with industry, government, and research partners, using a whole-systems approach to design better batteries, drivetrains, and engines, as well as thermal management, energy storage, power electronic, climate control, alternative fuel, combustion, and emission systems. NREL's sustainable transportation research, development, and deployment (RD&D) efforts are not limited to vehicles, roads, and fueling stations. The lab also explores ways to save energy and reduce GHGs by integrating transportation technology advancements with renewable energy generation, power grids and building systems, urban planning and policy, and fleet operations.

  9. High Energy QCD

    SciTech Connect (OSTI)

    Yuri Kovchegov

    2012-05-31

    The project significantly advanced our understanding of the theory of strong interactions known as quantum chromodynamics (QCD) in high energy collisions of elementary particles and nuclei. QCD is one of the four fundamental forces of nature, but is understood quite poorly due to the complexity of strong interactions. This project advanced our understanding of QCD in the very high energy collisions of protons and nuclei, where densities of quarks and gluons inside the colliding particles are so high (due to high energy) that complicated nonlinear interactions between quarks and gluons become important. This regime is known as gluon (or parton) saturation. The result of the project is a significant improvement of our understanding of the physics of gluon saturation: important (running coupling) corrections to the existing description of the process (the so-called Balitsky-Kovchegov equation) have been calculated, placing the BK equation in good agreement with the experimental data on deep inelastic scattering (DIS), a process where an electron is collided with the proton to probe the proton's internal structure. Corresponding cross section for quark and gluon production in DIS and nuclear collisions have been calculated and corrected correspondingly, resulting in new and interesting predictions for the physics to be probed in heavy ion collisions at the Large Hadron Collider (LHC). The dense gluon systems play an important role in collisions of ultrarelativistic large nuclei, which are performed in order to create a plasma of quarks and gluons (QGP). An important question in the field is how exactly this QGP is produced in a collision of two heavy ions. The conclusion of this project is that QGP production happens due to strong coupling effects between quarks and gluons. This made theoretical description of QGP production only possible using the methods emerging from string theory. Using these methods QGP production was well understood as a result of this project

  10. Prospects for Accelerated Development of High Performance Structural Materials

    SciTech Connect (OSTI)

    Zinkle, Steven J; Ghoniem, Nasr M.

    2011-01-01

    We present an overview of key aspects for development of steels for fission and fusion energy applications, by linking material fabrication to thermo-mechanical properties through a physical understanding of microstructure evolution. Numerous design constraints (e.g. reduced activation, low ductile-brittle transition temperature, low neutron-induced swelling, good creep resistance, and weldability) need to be considered, which in turn can be controlled through material composition and processing techniques. Recent progress in the development of high-performance steels for fossil and fusion energy systems is summarized, along with progress in multiscale modeling of mechanical behavior in metals. Prospects for future design of optimum structural steels in nuclear applications by utilization of the hierarchy of multiscale experimental and computational strategies are briefly described.

  11. Development of High-Gradient Dielectric Laser-Driven Particle Accelerator Structures

    SciTech Connect (OSTI)

    Byer, Robert L.

    2013-11-07

    The thrust of Stanford's program is to conduct research on high-gradient dielectric accelerator structures driven with high repetition-rate, tabletop infrared lasers. The close collaboration between Stanford and SLAC (Stanford Linear Accelerator Center) is critical to the success of this project, because it provides a unique environment where prototype dielectric accelerator structures can be rapidly fabricated and tested with a relativistic electron beam.

  12. Argonne Wakefield Accelerator Facility | Argonne National Laboratory

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

    Facilities 4 Tesla Magnet Facility Argonne Wakefield Accelerator Facility Argonne Wakefield Accelerator Facility Argonne Wakefield Accelerator Facility In order to achieve the high accelerating gradients needed to produce the tremendous energies required by a future particle accelerator, scientists have been looking for new ideas and solutions. Wakefield acceleration offers a potentially bold new path for the construction of the next generation of particle accelerators. The Argonne Wakefield

  13. High energy physics

    SciTech Connect (OSTI)

    Kernan, A.; Shen, B.C.; Ma, E.

    1997-07-01

    This proposal is for the continuation of the High Energy Physics program at the University of California at Riverside. In hadron collider physics the authors will complete their transition from experiment UA1 at CERN to the DZERO experiment at Fermilab. On experiment UA1 their effort will concentrate on data analysis at Riverside. At Fermilab they will coordinate the high voltage system for all detector elements. They will also carry out hardware/software development for the D0 muon detector. The TPC/Two-Gamma experiment has completed its present phase of data-taking after accumulating 160 pb{sup {minus}}1 of luminosity. The UC Riverside group will continue data and physics analysis and make minor hardware improvement for the high luminosity run. The UC Riverside group is participating in design and implementation of the data acquisition system for the OPAL experiment at LEP. Mechanical and electronics construction of the OPAL hadron calorimeter strip readout system is proceeding on schedule. Data analysis and Monte Carlo detector simulation efforts are proceeding in preparation for the first physics run when IEP operation comenses in fall 1989.

  14. Passive tailoring of laser-accelerated ion beam cut-off energy by using double foil assembly

    SciTech Connect (OSTI)

    Chen, S. N. Brambrink, E.; Mancic, A.; Romagnani, L.; Audebert, P.; Fuchs, J.; Robinson, A. P. L.; Antici, P.; Dipartimento SBAI, Università di Roma « La Sapienza », Via Scarpa 14-16, 00165 Roma; INRS-Énergie et Matériaux, 1650 bd. L. Boulet, Varennes, J3X1S2 Québec ; D'Humières, E.; Centre de Physique Théorique, CNRS-Ecole Polytechnique, 91128 Palaiseau; University of Bordeaux—CNRS—CEA, CELIA, UMR5107, 33405 Talence ; Gaillard, S.; Grismayer, T.; Mora, P.; Pépin, H.

    2014-02-15

    A double foil assembly is shown to be effective in tailoring the maximum energy produced by a laser-accelerated proton beam. The measurements compare favorably with adiabatic expansion simulations, and particle-in-cell simulations. The arrangement proposed here offers for some applications a simple and passive way to utilize simultaneously highest irradiance lasers that have best laser-to-ion conversion efficiency while avoiding the production of undesired high-energy ions.

  15. High Energy Density Ultracapacitors | Department of Energy

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

    and Vehicle Technologies Program Annual Merit Review and Peer Evaluation es038smith2011p.pdf (1.95 MB) More Documents & Publications High Energy Density Ultracapacitors ...

  16. High Energy Density Ultracapacitors | Department of Energy

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

    Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. esp22smith.pdf (1.09 MB) More Documents & Publications High Energy Density Ultracapacitors High ...

  17. Report: U.S. Military Accelerates Deployment of Clean Energy Technologies

    Broader source: Energy.gov [DOE]

    Deployment of clean energy technologies is accelerating across military installations operated by the U.S. Department of Defense, according to a report released by The Pew Charitable Trusts.

  18. EA-1147: Low Energy Demonstration Accelerator Tech Area 53, Los Alamos, New Mexico

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts that would be expected to occur if the Department of Energy were to design, build, and test critical prototypical components of the accelerator system...

  19. Manufacturers and Utilities to Accelerate Industry Uptake of Superior Energy Performance

    Broader source: Energy.gov [DOE]

    At a White House meeting of the Better Buildings Initiative on December 3rd, six manufacturers and three utilities officially joined the Department of Energy’s Better Buildings Industrial Superior Energy Performance (SEP) Accelerator Program.

  20. Accelerator Technology | Argonne National Laboratory

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

    Research Accelerator Technology ATLAS at the LHC Cosmology & Astrophysics Instrumentation Precision Muon Physics Neutrino Physics Theoretical High Energy Physics Accelerator Technology Accelerator Technology To make the next generation of world-class particle accelerators - one even grander than the Large Hadron Collider in Switzerland - scientists will need to either create an extraordinarily large machine or rethink the basic principles that underpin the functioning of the accelerator.

  1. BEST OFFER EVER ACCELERATED TEXAS UPGRADES | Department of Energy

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

    ... and control. Read more in the Austin Energy final report. Approaches Taken Austin Energy experimented with a combination of financial incentives, marketing techniques, and ...

  2. Secretary Moniz Announces Clean Energy Technologies are Accelerating...

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

    The updated report, which was announced by Energy Secretary Ernest Moniz during a ... and this report confirms it," Secretary Moniz said. "Today, clean energy technologies ...

  3. Offshore Wind Market Acceleration Projects | Department of Energy

    Office of Environmental Management (EM)

    ... As part of an international collaboration with the International Energy Agency, the Energy ... of planning, construction, and integration practices, which will ensure offshore ...

  4. FSU High Energy Physics

    SciTech Connect (OSTI)

    Prosper, Harrison B.; Adams, Todd; Askew, Andrew; Berg, Bernd; Blessing, Susan K.; Okui, Takemichi; Owens, Joseph F.; Reina, Laura; Wahl, Horst D.

    2014-12-01

    The High Energy Physics group at Florida State University (FSU), which was established in 1958, is engaged in the study of the fundamental constituents of matter and the laws by which they interact. The group comprises theoretical and experimental physicists, who sometimes collaborate on projects of mutual interest. The report highlights the main recent achievements of the group. Significant, recent, achievements of the group’s theoretical physicists include progress in making precise predictions in the theory of the Higgs boson and its associated processes, and in the theoretical understanding of mathematical quantities called parton distribution functions that are related to the structure of composite particles such as the proton. These functions are needed to compare data from particle collisions, such as the proton-proton collisions at the CERN Large Hadron Collider (LHC), with theoretical predictions. The report also describes the progress in providing analogous functions for heavy nuclei, which find application in neutrino physics. The report highlights progress in understanding quantum field theory on a lattice of points in space and time (an area of study called lattice field theory), the progress in constructing several theories of potential new physics that can be tested at the LHC, and interesting new ideas in the theory of the inflationary expansion of the very early universe. The focus of the experimental physicists is the Compact Muon Solenoid (CMS) experiment at CERN. The report, however, also includes results from the D0 experiment at Fermilab to which the group made numerous contributions over a period of many years. The experimental group is particularly interested in looking for new physics at the LHC that may provide the necessary insight to extend the standard model (SM) of particle physics. Indeed, the search for new physics is the primary task of contemporary particle physics, one motivated by the need to explain certain facts, such as the

  5. The energy transfer in the TEMP-4M pulsed ion beam accelerator

    SciTech Connect (OSTI)

    Isakova, Y. I.; Pushkarev, A. I.; Khaylov, I. P.

    2013-07-15

    The results of a study of the energy transfer in the TEMP-4M pulsed ion beam accelerator are presented. The energy transfer efficiency in the Blumlein and a self-magnetically insulated ion diode was analyzed. Optimization of the design of the accelerator allows for 85% of energy transferred from Blumlein to the diode (including after-pulses), which indicates that the energy loss in Blumlein and spark gaps is insignificant and not exceeds 10%12%. Most losses occur in the diode. The efficiency of energy supplied to the diode to the energy of accelerated ions is 8%9% for a planar strip self-magnetic MID, 12%15% for focusing diode and 20% for a spiral self-magnetic MID.

  6. High-gradient two-beam electron accelerator

    SciTech Connect (OSTI)

    Hirshfield, Jay L.

    2014-11-04

    The main goal for this project was to design, build, and evaluate a detuned-cavity, collinear, two-beam accelerator structure. Testing was to be at the Yale University Beam Physics Laboratory, under terms of a sub-grant from Omega-P to Yale. Facilities available at Yale for this project include a 6-MeV S-band RF gun and associated beam line for forming and transporting a ~1 A drive beam , a 300 kV beam source for use as a test beam, and a full panoply of laboratory infrastructure and test equipment. During the first year of this project, availability and functionality of the 6-MeV drive beam and 300 kV test beam were confirmed, and the beam line was restored to a layout to be used with the two-beam accelerator project. Major efforts during the first year were also focused on computational design and simulation of the accelerator structure itself, on beam dynamics, and on beam transport. Effort during the second year was focussed on building and preparing to test the structure, including extensive cold testing. Detailed results from work under this project have been published in twelve archival journal articles, listed in Section IV of the technical report.

  7. From Deployment Chasms to Energy Solutions: DOEs Role in Accelerating Job Creation and Clean Energy Deployment

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

    From Deployment Chasms to Energy Solutions DOE's Role in Accelerating Job Creation and Clean Energy Deployment US State Energy Advisory Board (www.steab.org) Market Transformation and Deployment Task Force Report Approved Final Report: 2/23/11 The U.S. State Energy Advisory Board (STEAB) has taken on as a top priority to identify any and all ways for the US DOE to accelerate clean energy deployment and job creation in America. To carry out this priority, the STEAB created the Market

  8. Beam energy tracking system on Optima XEx high energy ion implanter

    SciTech Connect (OSTI)

    David, Jonathan; Satoh, Shu; Wu Xiangyang; Geary, Cindy; Deluca, James

    2012-11-06

    The Axcelis Optima XEx high energy implanter is an RF linac-based implanter with 12 RF resonators for beam acceleration. Even though each acceleration field is an alternating, sinusoidal RF field, the well known phase-focusing principle produces a beam with a sharp quasi-monoenergetic energy spectrum. A magnetic energy filter after the linac further attenuates the low energy continuum in the energy spectrum often associated with RF acceleration. The final beam energy is a function of the phase and amplitude of the 12 resonators in the linac. When tuning a beam, the magnetic energy filter is set to the desired energy, and each linac parameter is tuned to maximize the transmission through the filter. Once a beam is set up, all the parameters are stored in a recipe, which can be easily tuned and has proven to be quite repeatable. The magnetic field setting of the energy filter selects the beam energy from the RF Linac accelerator, and in-situ verification of beam energy in addition to the magnetic energy filter setting has long been desired. An independent energy tracking system was developed for this purpose, using the existing electrostatic beam scanner as a deflector to construct an in-situ electrostatic energy analyzer. This paper will describe the system and performance of the beam energy tracking system.

  9. Acceleration and stability of a high-current ion beam in induction fields

    SciTech Connect (OSTI)

    Karas', V. I.; Manuilenko, O. V.; Tarakanov, V. P.; Federovskaya, O. V.

    2013-03-15

    A one-dimensional nonlinear analytic theory of the filamentation instability of a high-current ion beam is formulated. The results of 2.5-dimensional numerical particle-in-cell simulations of acceleration and stability of an annular compensated ion beam (CIB) in a linear induction particle accelerator are presented. It is shown that additional transverse injection of electron beams in magnetically insulated gaps (cusps) improves the quality of the ion-beam distribution function and provides uniform beam acceleration along the accelerator. The CIB filamentation instability in both the presence and the absence of an external magnetic field is considered.

  10. The Office of High Energy Physics Announces the Launch of Its New

    Office of Science (SC) Website

    Accelerator R&D Stewardship Webpages | U.S. DOE Office of Science (SC) Featured Content » 2013 » The Office of High Energy Physics Announces the Launch of Its New Accelerator R&D Stewardship Webpages High Energy Physics (HEP) HEP Home About Research Facilities Science Highlights Benefits of HEP Funding Opportunities Advisory Committees Community Resources Featured Content 2016 2015 2014 2013 2012-2008 Reports Contact Information High Energy Physics U.S. Department of Energy