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Pre-conceptual Design of a Rapid Cycling Medical Synchrotron
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IBS and Expected Luminosity Performance For RHIC Beams At Top Energy With 56 MHz SRF Cavity
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IBS and Potential Luminosity Improvement for RHIC Operation Below Transition Energy
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IBS for RHIC operation below transition energy and various RF systems
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Intra-beam scattering and its applications to ERL
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Projections of potential luminosity improvement for low-energy RHIC operation with electron cooling
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RHIC Performance with 56 MHz RF and Gold Ion Beams Pre-cooled at Lower Energy
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Towards demonstration of electron cooling with bunched electron beam
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Potential for Luminosity improvement for low-energy RHIC operations with long bunches
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Feasibility of Electron Cooling for Low-Energy RHIC Operation
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Potential for luminosity improvement for low-energy RHIC operation with long bunches
Electron cooling was proposed to increase luminosity of the RHIC collider for heavy ion beams at low energies. Luminosity decreases as the square of bunch intensity due to the beam loss from the RF bucket as a result of the longitudinal intra beam scattering (IBS), as well as due to the transverse emittance growth because of the transverse IBS. Both transverse and longitudinal IBS can be counteracted with electron cooling. This would allow one to keep the initial peak luminosity close to constant throughout the store essentially without the beam loss. In addition, the phase-space density of the hadron beams can be further increased by providing stronger electron cooling. Unfortunately, the defining limitation for low energies in RHIC is expected to be the space charge. Here we explore an idea of additional improvement in luminosity, on top of the one coming from just IBS compensation and longer stores, which may be expected if one can operate with longer bunches at the space-charge limit in a collider. This approach together with electron cooling may result in about 10-fold improvement in total luminosity for low-energy RHIC program.
GHEISHA Simulation Calculations Of Albedo
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The RHIC Reference Geometry
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Survey Control for the RHIC Transport Line
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Organic-Based ("Excitonic") Solar Cells
The existing types of organic-based solar cells, including dye-sensitized solar cells (DSSCs), can be categorized by their photoconversion mechanism as excitonic solar cells, XSCs. Their distinguishing characteristic is that charge generation and separation are simultaneous and this occurs via exciton dissociation at a heterointerface. Electrons are photogenerated on one side of the interface and holes on the other. This results in fundamental differences between XSCs and conventional PV cells. For example, the open circuit photovoltage, Voc, in conventional cells is limited to less than the magnitude of the band bending, bi; however, Voc in XSCs is commonly greater than bi. A general theoretical description is employed to quantify the differences between conventional and excitonic cells. The key difference is the dominant importance, in XSCs, of the photoinduced chemical potential energy gradient, ..delta..hn, whereas ..delta..hn is unimportant, and therefore neglected, in theoretical descriptions of conventional PV cells. Several examples are provided.
High Luminosity p-p Operation at RHIC
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Emittance Reduction between EBIS LINAC and Booster by Electron Beam Cooling - Is Single Pass Cooling Possible?
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Issues Concerning High Current Low Energy Electron Beams Required for Ion Cooling between EBIS LINAC and Booster
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Novel Source Ionizer Options for Polarized Ions
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Parallel Ion Energy Spread Due to Interaction With an Electron Bunch in the RHIC Electron Beam Cooling Solenoid
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Part II/Addendum Electron Beam Cooling between EBIS LINAC and Booster; Is Single Pass Cooling Possible?
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Plasma Lens for Super Neutrino Beam at BNL and Other Applications
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Plasma Micro-Stability Analysis for the RHIC Electron Beam Cooler
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Device and technique for in-situ coating of the RHIC cold bore vacuum tubes with thick OFHC
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Recent RHIC in-situ coating technology developments
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Energy Recovery Linac: Magnetic Measurement of the ERL Magnets
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Expected Harmonics (Version 1.0) in BNL-built LHC Dipoles
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RHIC Magnetic Measurements: Definitions and Conventions
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Suppressing Intrinsic Spin Harmonics at the AGS
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Polarized proton beam acceleration with a single Siberian Snake in each RHIC ring
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Beam Polarization Distribution for the Relativistic Heavy Ion Collider
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Development and evaluation of systems for controlling parallel high di/dt thyratrons
Increasing numbers of high power, high repetition rate applications dictate the use or thyratrons in multiple of hard parallel configurations to achieve the required rate of current rise, di/dt. This in turn demands the development of systems to control parallel thyratron commutation with nanosecond accuracy. Such systems must be capable of real-time, fully-automated control in multi-kilohertz applications while still remaining cost effective. This paper describes the evolution of such a control methodology and system.
Tracking through a Warm Helical Snake for the AGS
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SIMBAD Users Manual. Version v.1.36
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Matching the Cold AGS Snake to the AGS Lattice
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Focusing of the AGS Cold Snake
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Thermal characteristics of air flow cooling in the lithium ion batteries experimental chamber
A battery pack prototype has been designed and built to evaluate various air cooling concepts for the thermal management of Li-ion batteries. The heat generation from the Li-Ion batteries was simulated with electrical heat generation devices with the same dimensions as the Li-Ion battery (200 mm x 150 mm x 12 mm). Each battery simulator generates up to 15W of heat. There are 20 temperature probes placed uniformly on the surface of the battery simulator, which can measure temperatures in the range from -40 C to +120 C. The prototype for the pack has up to 100 battery simulators and temperature probes are recorder using a PC based DAQ system. We can measure the average surface temperature of the simulator, temperature distribution on each surface and temperature distributions in the pack. The pack which holds the battery simulators is built as a crate, with adjustable gap (varies from 2mm to 5mm) between the simulators for air flow channel studies. The total system flow rate and the inlet flow temperature are controlled during the test. The cooling channel with various heat transfer enhancing devices can be installed between the simulators to investigate the cooling performance. The prototype was designed to configure the number of cooling channels from one to hundred Li-ion battery simulators. The pack is thermally isolated which prevents heat transfer from the pack to the surroundings. The flow device can provide the air flow rate in the gap of up to 5m/s velocity and air temperature in the range from -30 C to +50 C. Test results are compared with computational modeling of the test configurations. The present test set up will be used for future tests for developing and validating new cooling concepts such as surface conditions or heat pipes.
Electron-lens test stand instrumentation progress
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Direct Digital Phase Shift by DDS rf Source
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Numerically Controlled Phase Locked Loop Using Direct Digital Synthesizer
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Electron Gun for RHIC EBIS
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Optical simulations of the ion beam emittance growth in different types of a gridded lens
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Spherical Aberration Corrections for an Electrostatic Gridded Lens
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Optics modification of the electron collector for the Relativistic Heavy Ion Collider Electron Beam Ion Source
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Optics modification of the electron collector for the Relativistic Heavy Ion Collider Electron Beam Ion Source
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Depressed electron collector for the Gatling Gun Test Stand
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Optical, Thermal and Stress Simulations of a 300-kwatt Electron Collector
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The polarized hydrogen jet target measurements at RHIC
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Frequency budget for the PoP cavity
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Longitudinal coupling impedance measurements of a bellow at low frequencies
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