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Storage Rings

Description: Storage rings are circular machines that store particle beams at a constant energy. Beams are stored in rings without acceleration for a number of reasons (Tab. 1). Storage rings are used in high-energy, nuclear, atomic, and molecular physics, as well as for experiments in chemistry, material and life sciences. Parameters for storage rings such as particle species, energy, beam intensity, beam size, and store time vary widely depending on the application. The beam must be injected into a storag… more
Date: January 1, 2011
Creator: Fischer, W.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Vibration Control in Accelerators

Description: In the vast majority of accelerator applications, ground vibration amplitudes are well below tolerable magnet jitter amplitudes. In these cases, it is necessary and sufficient to design a rigid magnet support structure that does not amplify ground vibration. Since accelerator beam lines are typically installed at an elevation of 1-2m above ground level, special care has to be taken in order to avoid designing a support structure that acts like an inverted pendulum with a low resonance frequency… more
Date: January 1, 2011
Creator: Montag, C.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Clean Cities Annual Metrics Report 2009 (Revised)

Description: Document provides Clean Cities coalition metrics about the use of alternative fuels; the deployment of alternative fuel vehicles, hybrid electric vehicles (HEVs), and idle reduction initiatives; fuel economy activities; and programs to reduce vehicle miles driven.
Date: August 1, 2011
Creator: Johnson, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Stochastic Cooling

Description: Stochastic Cooling was invented by Simon van der Meer and was demonstrated at the CERN ISR and ICE (Initial Cooling Experiment). Operational systems were developed at Fermilab and CERN. A complete theory of cooling of unbunched beams was developed, and was applied at CERN and Fermilab. Several new and existing rings employ coasting beam cooling. Bunched beam cooling was demonstrated in ICE and has been observed in several rings designed for coasting beam cooling. High energy bunched beams have … more
Date: January 1, 2011
Creator: Blaskiewicz, M.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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High Resolution Photon Timing with MCP-PMTs: A Comparison of a Commercial Constant Fraction Discriminator (CFD) with the ASIC-based Waveform Digitizers TARGET and WaveCatcher

Description: There is a considerable interest to develop new time-of-flight detectors using, for example, micro-channel-plate photodetectors (MCP-PMTs). The question we pose in this paper is if new waveform digitizer ASICs, such as the WaveCatcher and TARGET, operating with a sampling rate of 2-3 GSa/s can compete with 1GHz BW CFD/TDC/ADC electronics. We have performed a series of measurements with these waveform digitizers coupled to MCP-PMTs operating at low gain and with a signal equivalent to {approx}40… more
Date: July 14, 2011
Creator: Breton, D.; /Orsay, LAL; Delagnes, E.; /DAPNIA, Saclay; Maalmi, J.; /Orsay, LAL et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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PARTICIPANT SUPPORT FOR THE 2010 GORDON RESEARCH CONFERENCE ON PLASMA PROCESSING SCIENCE (JULY 11-16,2010)

Description: The 2010 Gordon Research Conference on Plasma Processing Science will feature a comprehensive program that will highlight the most cutting edge scientific advances in low temperature plasma science and will explore the applications of low temperature plasma technology relative to many grand societal challenges. Fundamental science sessions will focus on plasma kinetics, plasma surface interactions, and recent trends in plasma generation and multi-phase plasmas. Application sessions will explore… more
Date: June 14, 2011
Creator: Kortshagen, Uwe
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Parameter Scaling and Practical Design of TME Lattice

Description: It is a challenge to produce a practical design of an electron storage ring with a theorectical minimum emittance (TME) lattice of ultra low emittance, e.g. several pico-meters, due to the very strong focusing and extremely large natural chromaticity associated to these lattice designs. To help dealing with this challenge, it is requisite to scale the parameters and look for a best solution. In this paper, the parameter scaling is summarized, and it is argued that, with the lattice configuratio… more
Date: November 8, 2011
Creator: Jiao, Yi; Cai, Yunhai; Chao, Alex & /SLAC /Beijing, Inst. High Energy Phys. /SLAC
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Final Progress Report for FG02-89ER14030

Description: Intracellular Dynamics of Energy-Transducing Organelles. The location and interaction of intracellular organelles is important for exchange of substrate and product between compartments for optimum functioning of biochemical pathways and energy transduction. Plastids and stromules, tubular plastid extensions, are highly dynamic in many plant tissues. Stromules can connect two or more plastids and proteins and macromolecular complexes can be transferred between them. Stromules have been observed… more
Date: October 26, 2011
Creator: Hanson, Maureen R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Best Practices Guide for Energy-Efficient Data Center Design: Revised March 2011 (Brochure)

Description: This guide provides an overview of best practices for energy-efficient data center design which spans the categories of Information Technology (IT) systems and their environmental conditions, data center air management, cooling and electrical systems, on-site generation, and heat recovery. IT system energy efficiency and environmental conditions are presented first because measures taken in these areas have a cascading effect of secondary energy savings for the mechanical and electrical systems… more
Date: March 1, 2011
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Sources of the Radio Background Considered

Description: We investigate possible origins of the extragalactic radio background reported by the ARCADE 2 collaboration. The surface brightness of the background is several times higher than that which would result from currently observed radio sources. We consider contributions to the background from diffuse synchrotron emission from clusters and the intergalactic medium, previously unrecognized flux from low surface brightness regions of radio sources, and faint point sources below the flux limit of exi… more
Date: August 22, 2011
Creator: Singal, J.; Stawarz, L.; Lawrence, A. & Petrosian, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Aerosol Imaging with a Soft X-ray Free Electron Laser

Description: Lasers have long played a critical role in the advancement of aerosol science. A new regime of ultrafast laser technology has recently be realized, the world's first soft xray free electron laser. The Free electron LASer in Hamburg, FLASH, user facility produces a steady source of 10 femtosecond pulses of 7-32 nm x-rays with 10{sub 12} photons per pulse. The high brightness, short wavelength, and high repetition rate (>500 pulses per second) of this laser offers unique capabilities for aeros… more
Date: August 22, 2011
Creator: Bogan, Michael J.; /SLAC /LLNL, Livermore; Boutet, Sebastien; /SLAC National Accelerator Laboratory; Chapman, Henry N.; U., /DESY /Hamburg et al.
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Partner: UNT Libraries Government Documents Department
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Observation of Magnetic Resonances in Electron Clouds in a Positron Storage Ring

Description: The first experimental observation of magnetic resonances in electron clouds is reported. The resonance was observed as a modulation in cloud intensity for uncoated as well as TiN-coated aluminum surfaces in the positron storage ring of the PEP-II collider at SLAC. Electron clouds frequently arise in accelerators of positively charged particles, and severely impact the machines performance. The TiN coating was found to be an effective remedy, reducing the cloud intensity by three orders of magn… more
Date: August 24, 2011
Creator: Pivi, M. T. F.; Ng, J. S. T.; Cooper, F.; Kharakh, D.; King, F.; Kirby, R. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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R^4 Counterterm and E_{7(7)} Symmetry in Maximal Supergravity

Description: The coefficient of a potential R{sup 4} counterterm in N = 8 supergravity has been shown previously to vanish in an explicit three-loop calculation. The R{sup 4} term respects N = 8 supersymmetry; hence this result poses the question of whether another symmetry could be responsible for the cancellation of the three-loop divergence. In this article we investigate possible restrictions from the coset symmetry E{sub 7(7)}/SU(8), using a double-soft scalar limit relation derived recently by Arkani-… more
Date: July 6, 2011
Creator: Broedel, Johannes; /Potsdam, Max Planck Inst. /Leibniz U., Hannover & Dixon, Lance J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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