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Throughput Optimization in Multi-Cell CDMA Networks

Description: In this paper, the authors investigate the performance of a multi-cell CDMA network by determining the maximum throughput that the network can archive for a given grade-of-service requirement, quality-of-service requirement, network topology and call arrival rate profile.
Date: March 2005
Creator: Akl, Robert G.; Naraghi-Pour, Mort & Hegde, Manju V.
Item Type: Refine your search to only Paper
Partner: UNT College of Engineering
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Relating Boolean Gate Truth Tables to One-Way Functions

Description: In this paper, the authors present a schema to build one way functions from a family of Boolean gates. Moreover, the authors relate characteristics of these Boolean gate truth tables to properties of the derived one-way functions.
Date: March 3, 2008
Creator: Gomathisankaran, Mahadevan & Tyagi, Akhilesh
Item Type: Refine your search to only Paper
Partner: UNT College of Engineering
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Gold Beam Losses at the AGS Booster Injection.

Description: Gold beam injection efficiency decreases in proportional to the beam loss in the AGS Booster. A close look shows that large number of electrons, ions, and neutral particles are created when the gold beam scrapes wall. To investigate the neutral particle production due to the beam loss, local vacuum measurement was made during the 1998 run. It shows that the pressure created by the Booster Au{sup 31+} beam loss at injection has a 35 ms decay time constant. The beam loss created pressure bump in … more
Date: March 29, 1999
Creator: Zhang, S. Y. & Ahrens, L. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Cupronickel Rotating Band Pion Production Target for Muon Colliders.

Description: A conceptual design is presented for a high power cupronickel pion production target. It forms a circular band in a horizontal plane with approximate dimensions of: 2.5 meters radius, 6 cm high and 0.6 cm thick. The target is continuously rotated at 3 m/s to carry heat away from the production region to a water cooling channel. Bunches of 16 GeV protons with total energies of 270 kl and repetition rates of 15 Hz are incident tangentially to arc of the target along the symmetry axis of a 20 Tesl… more
Date: March 29, 1999
Creator: King, B. J.; Weggel, R. J.; Mokhov, N. V. & Moser, S. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Precision Magnetic Elements for the SNS Storage Ring.

Description: Magnetic elements for an accumulator storage ring for a 1 GeV Spallation Neutron Source (SNS) have been under design. The accumulation of very high intensity protons in a storage ring requires beam optical elements of very high purity to minimize higher order resonances in the presence of space charge. The parameters of the elements required by the accumulator lattice design have been reported. The dipoles have a 17cm gap and are 124cm long. The quadrupoles have a physical length to aperture di… more
Date: March 29, 1999
Creator: Danby, G.; Jackson, J. & Spataro, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A P-Carbon CNI Polarimeter for RHIC.

Description: The RHIC spin program requires excellent polarimetry so that the knowledge of the beam polarization does not limit the errors on the experimental measurements. However, polarimetry of proton beams with energies higher than about 30GeV poses a difficult challenge. For polarization monitoring during operation, a fast and reliable polarimeter is required that produces a polarization measurement with a 10% relative error within a few minutes. The p-Carbon elastic scattering in the Coulomb-Nuclear-S… more
Date: March 29, 1999
Creator: Huang, H.; Bai, M.; Bunce, G.; Makdisi, Y.; Roser, T.; Imai, K. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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RHIC Beam Loss Monitor System Initial Operation.

Description: The RHIC Beam Loss Monitor (BLM) System is designed to prevent beam loss quenching of the superconducting magnets, and acquire loss data. Four hundred ion chambers are located around the rings to detect losses. The required 8-decade range in signal current is compressed using an RC pre- integrator ahead of a low current amplifier. A beam abort may be triggered if fast or slow losses exceed programmable threshold levels. A micro-controller based VME module sets references and gains and reads tri… more
Date: March 29, 1999
Creator: Witkover, R. L.; Michnoff, R. J. & Geller, J. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Beam Instrumentation for the Spallation Neutron Source Ring.

Description: The Spallation Neutron Source (SNS) will be constructed by a multi-laboratory collaboration with BNL responsible for the transfer lines and ring. [1] The 1 MW beam power necessitates careful monitoring to minimize un-controlled loss. This high beam power will influence the design of the monitors in the high energy beam transport line (HEBT) from linac to ring, in the ring, and in the ring-to-target transfer line (RTBT). The ring instrumentation must cover a 3-decade range of beam intensity duri… more
Date: March 29, 1999
Creator: Witkover, R. L.; Cameron, P. R.; Shea, T. J.; Connolly, R. C. & Kesselman, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Beam-Loss Driven Design Optimization for the Spallation Neutron Source (SNS) Ring.

Description: This paper summarizes three-stage design optimization for the Spallation Neutron Source (SNS) ring: linear machine design (lattice, aperture, injection, magnet field errors and misalignment), beam core manipulation (painting, space charge, instabilities, RF requirements), and beam halo consideration (collimation, envelope variation, e-p issues etc.).
Date: March 29, 1999
Creator: Wei, J.; Beebe-Wang, J.; Blaskiewicz, M.; Cameron, P.; Danby, G.; Gardner, C. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A High Power RF Coupler Design for Muon Cooling RF Cavities.

Description: We present a high power RF coupler design for an interleaved {pi}/2 805 MHz standing wave accelerating structure proposed for an muon cooling experiment at FNAL. The coupler, in its simplest form, is a rectangular waveguide directly connected to an accelerating Cell through an open slot on the cavity side-wall or end-plates. Two of such couplers are needed to feed the interleaved cavities. Current high power RF test requires the coupler to be at critical coupling. Numerical simulations on the c… more
Date: March 29, 1999
Creator: Corlett, J.; Li, Derun; Rimmer, R.; Holtkamp, N.; Moretti, A. & Kirk, H. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Interaction Region Local Correction for the Large Hadron Collider.

Description: The performance of the Large Hadron Collider (LHC) at collision energy is limited by the field quality of the interaction region (IB) quadrupoles and dipoles. In this paper we study the impact of the expected field errors of these magnets on the dynamic aperture (DA). Since the betatron phase advance is well defined for magnets that are located in regions of large beta functions, local corrections can be very effective and robust. We compare possible compensation schemes and propose a corrector… more
Date: March 29, 1999
Creator: Wei, J.; Fischer, W.; Ptitsin, V.; Ostojic, R. & Strait, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Muon Colliders - Ionization Cooling and Solenoids.

Description: For a muon collider, to obtain the needed luminosity, the phase space volume must be greatly reduced within the muon life time. The ionization cooling is the preferred method used to compress the phase space and reduce the emittance to obtain high luminosity muon beams. Alternating solenoid lattices has been proposed for muon colliders, where the emittance are huge. We present an overview, discuss formalism, transfer maps for solenoid magnets and beam dynamics.
Date: March 29, 1999
Creator: Parsa, Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Application of the SXF Lattice Description and the UAL Software Environment to the Analysis of the LHC.

Description: A software environment for accelerator modeling has been developed which includes the UAL (Unified Accelerator Library), a collection of accelerator physics libraries with a Per1 interface for scripting, and the SXF (Standard eXchange Format), a format for accelerator description which extends the MAD sequence by including deviations from design values. SXF interfaces have been written for several programs, including MAD9 and MAD8 via the doom database, Cosy, TevLat and UAL itself, which includ… more
Date: March 29, 1999
Creator: Fischer, W.; Pilat, F. & Ptitson, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

US-LHC Magnet Database and Conventions.

Description: The US-LHC Magnet Database is designed for production-magnet quality assurance, field and alignment error impact analysis, cryostat assembly assistance, and ring installation assistance. The database consists of tables designed to store magnet field and alignment measurements data and quench data. This information will also be essential for future machine operations including local IR corrections.
Date: March 29, 1999
Creator: Wei, J.; McChesney, D.; Jain, A.; Peggs, S.; Pilat, F.; Bottura, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Feedback Design Method Review and Comparison.

Description: Different methods for feedback designs are compared. These includes classical Proportional Integral Derivative (P. I. D.), state variable based methods like pole placement, Linear Quadratic Regulator (L. Q. R.), H-infinity and p-analysis. These methods are then applied for the design and analysis of the RHIC phase and radial loop, yielding a performance, stability and robustness comparison.
Date: March 29, 1999
Creator: Onillon, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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INVESTIGATION OF COHERENT EMISSION FROM THE NSLS VUV RING.

Description: Bursts of coherent radiation are observed from the NSLS VUV ring near a wavelength of 7 mm. The bursts occur when the electron beam current (I) exceeds a threshold value (I{sub th}), which itself varies with ring operating conditions. Beyond threshold, the average intensity of the emission is found to increase as (I-I{sub th}){sup 2}. With other parameters held nearly constant, the threshold current value is found to increase quadratically with synchrotron frequency, indicating a linear depende… more
Date: March 1, 1999
Creator: Carr, G. L.; Kramer, S. L.; Murphy, J. B.; Laveigne, J.; Lobo, R. P. S.; Reitze, D. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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AGS Resonant Extraction With High Intensity Beams.

Description: The Brookhaven AGS third integer resonant extraction system allows the AGS to provide high quality, high intensity 25.5 GeV/c proton beams simultaneously to four target stations and as many as 8 experiments. With the increasing intensities (over 7 x 10{sup 13} protons/pulse) and associated longer spill periods (2.4 to 3 seconds long), we continue to run with low losses and high quality low modulation continuous current beams.[1] Learning to extract and transport these higher intensity beams has… more
Date: March 29, 1999
Creator: Ahrens, L.; Brown, K.; Glenn, J. W.; Roser, T.; Tsoupas, N. & Vanasselt, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Solenoid Capture System for Neutrino Production.

Description: This paper describes the use of a high field solenoidal magnet to capture secondary pions from the production target. The captured pions subsequentially decay to produce the neutrino beam. A pion capture system using a high field solenoid magnet has been proposed for the muon collider[1]. This technology would also be available for neutrino beam production. It will be shown that a high field solenoid would produce a larger flux of neutrinos with energy, E{sub v} < 1.3 GeV, than a neutrino be… more
Date: March 29, 1999
Creator: Diwan, M.; Kahn, S. & Palmer, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Simulation, Generation, and Characterization of High Brightness Electron Source at 1 GV/m Gradient.

Description: This paper describes computer simulations and measurements on an electron bunch from a pulsed, high gradient gap. MAFIA and PBGUNS were used to calculate the emittance, brightness and energy spread of the electron beam for peak currents ranging from 10A to 1 kA and pulse durations ranging from 0.3 ps to 10 ps. Under optimum conditions, normalized emittance of 10{sup -7} {pi} m-rad, beam brightness of 3 x 10{sup 15} A/(m-rad){sup 2} and energy spread of 0.15% were obtained. A pulsed high voltage… more
Date: March 29, 1999
Creator: Srinivasan-Rao, T.; Schill, J.; Ben-Zvi, Ilan; Batchelor, K.; Farrell, J. P.; Smedley, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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RHIC Beam Synchronous Trigger Module.

Description: The RHIC Beam Synchronous Event System consists of centralized event encoders (one for each collider ring), which operate from the RF clock and the revolution clock provided by the RHIC RF system, and distributed embedded decoders. The Beam Synchronous Trigger Module (V124) is a general purpose 6U x 4HP, VMEbus controlled module that is compatible with the RHIC Beam Synchronous Event System and is designed to provide clocks and triggers for collider data acquisition systems and experiments. The… more
Date: March 29, 1999
Creator: Hartmann, H. & Kerner, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The RHIC/AGS Online Model Environment: Design and Overview.

Description: An integrated online modeling environment is currently under development for use by AGS and RHIC physicists and commissioners. This environment combines the modeling efforts of both groups in a CDEV [1] client-server design, providing access to expected machine optics and physics parameters based on live and design machine settings. An abstract modeling interface has been designed as a set of adapters [2] around core computational modeling engines such as MAD and UAL/Teapot++ [3]. This approach… more
Date: March 29, 1999
Creator: Satogata, T.; Brown, K.; Pilat, F.; Tafti, A. A.; Tepikian, S. & Van Zeijts, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pulsing a 4.1 MW Motor Generator System to 34 MW Peak Power Under Constant Input Power Operation.

Description: Brookhaven operates a 9 MW motor generator, made by Siemens, as part of the main magnet power supply of the Alternating Gradient Synchrotron (AGS) accelerator. A cycloconverter power supply system is utilized to ensure that during pulsing the main magnets of the AGS up to 50 MW peak power, the input power of the motor generator remains constant. There is also another motor generator (MG set) at Brookhaven, a 40 year old system manufactured by Westinghouse. This MG set could be pulsed up to 34 M… more
Date: March 29, 1999
Creator: Marneris, I.; Badea, V.; Bannon, M.; Bonati, R.; Danowaki, G.; Sandberg, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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