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EXTRACTION COMPRESSION AND ACCELERATION OF HIGH LINE CHARGE DENSITY ION BEAMS

Description: High Energy Density Physics (HEDP) applications require high line charge density ion beams. An efficient method to obtain this type of beams is to extract a long pulse, high current beam from a gun at high energy, and let the beam pass through a decelerating field to compress it. The low energy beam-bunch is loaded into a solenoid and matched to a Brillouin flow. The Brillouin equilibrium is independent of the energy if the relationship between the beam size (a), solenoid magnetic field strengt… more
Date: May 20, 2005
Creator: Henestroza, Enrique; Henestroza, E.; Peters, C.; Yu, S. S.; Grote, D. P. & Briggs, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Progress on the RF Coupling Coil Module Design for the MICE Channel

Description: We describe the progress on the design of the RF coupling coil (RFCC) module for the international Muon Ionization Cooling Experiment (MICE) at Rutherford Appleton Laboratory (RAL) in the UK. The MICE cooling channel design consists of one SFOFO cell that is similar to that of the US Study-II of a neutrino factory. The MICE RFCC module comprises a superconducting solenoid, mounted around four normal conducting 201.25-MHz RF cavities. Each cavity has a pair of thin curved beryllium windows to cl… more
Date: May 8, 2005
Creator: Li, D.; Green, M. A.; Virostek, S. P.; Zisman, M. S.; Lau, W.; White, A. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dynamical Effects Due to Fringe Field of the Magnets in Circular Accelerators

Description: The leading Lie generators, including the chromatic effects, due to hard-edge fringe field of single multipole and solenoid are derived from the vector potentials within a Hamiltonian system. These nonlinear generators are applied to the interaction region of PEP-II to analyze the linear errors due to the feed-down from the off-centered quadrupoles and solenoid. The nonlinear effects of tune shifts at large amplitude, the synchro-betatron sidebands near half integer and their impacts on the dyn… more
Date: May 16, 2005
Creator: Cai, Y. & Nosochkov, Yu
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Current Status of the Next Linear Collider X-Band Klystron Development Program

Description: Klystrons capable of driving accelerator sections in the Next Linear Collider (NLC) have been developed at SLAC during the last decade. In addition to fourteen 50 MW solenoid-focused devices and a 50 MW Periodic Permanent Magnet focused (PPM) klystron, a 500 kV 75 MW PPM klystron was tested in 1999 to 80 MW with 3 {micro}s pulses, but very low duty. Subsequent 75 MW prototypes aimed for low-cost manufacture by employing reusable focusing structures external to the vacuum, similar to a solenoid … more
Date: May 9, 2005
Creator: Caryotakis, G.; Haase, A. A.; Jongewaard, E. N.; Pearson, C. & Sprehn, D. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Progress on the Focus Coil for the MICE Channel

Description: This report describes the progress on the magnet part of the absorber focus coil module for the international Muon Ionization Cooling Experiment (MICE). MICE consists of two cells of a SFOFO cooling channel that is similar to that studied in Feasibility 2 study of a neutrino factory [1]. The MICE absorber focus coil module consists of a pair of superconducting solenoids, mounted on an aluminum mandrel. The coil package is in its own vacuum vessel located around an absorber. The absorber is with… more
Date: May 13, 2005
Creator: Yang, S.Q.; Lau, W.; Senanayake, R.S.; Witte, H.; Green, M.A.; Drumm, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Boost Converters for Gas Electric and Fuel Cell Hybrid Electric Vehicles

Description: Hybrid electric vehicles (HEVs) are driven by at least two prime energy sources, such as an internal combustion engine (ICE) and propulsion battery. For a series HEV configuration, the ICE drives only a generator, which maintains the state-of-charge (SOC) of propulsion and accessory batteries and drives the electric traction motor. For a parallel HEV configuration, the ICE is mechanically connected to directly drive the wheels as well as the generator, which likewise maintains the SOC of propul… more
Date: June 16, 2005
Creator: McKeever, JW
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Modular Point Design for Heavy Ion Fusion

Description: We report on an ongoing study on modular Heavy Ion Fusion drivers. The modular driver is characterized by tens ({approx} 20) nearly identical induction linacs, each carrying a single high current beam. In this scheme, the Integrated Research Experiment (IRE) can be one of the full size induction linacs. Hence, this approach offers significant advantages in terms of driver development path. For beam transport, these modules use solenoids which are capable of carrying high line charge densities, … more
Date: January 27, 2005
Creator: Yu, S. S.; Barnard, J. J.; Briggs, R. J.; Callahan-Miller, D.; Celata, C. M.; Chao, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Compact Muon Solenoid Heavy Ion program

Description: The Pb-Pb center of mass energy at the LHC will exceed that of Au-Au collisions at RHIC (Relativistic Heavy Ion Collider) by nearly a factor of 30, providing exciting opportunities for addressing unique physics issues in a completely new energy domain. The interest of the Heavy Ion (HI) Physics at LHC is discussed in more detail in the LHC-USA white paper and the Compact Muon Solenoid (CMS) Heavy Ion proposal. A few highlights are presented in this document. Heavy ion collisions at LHC energies… more
Date: December 15, 2005
Creator: Yepes, Dr. Pablo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Beam-Based Alignment in the Rhic E-Cooling Solenoids.

Description: Accurate alignment of the electron and ion beams in the RHIC electron cooling solenoids is crucial for well-optimized cooling. Because of the greatly differing rigidities of the electron and ion beams, to achieve the specified alignment accuracy it is required that transverse magnetic fields resulting from imperfections in solenoid fabrication be down by five orders of magnitude relative to the pure solenoid fields. Shimming the solenoid field to this accuracy might be accomplished by survey te… more
Date: May 16, 2005
Creator: Cameron, P.; Ben-Zvi, Ilan; Dawson, W. C. & Al., Et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Numerical Studies of the Friction Force for the Rhic Electron Cooler.

Description: Accurate calculation of electron cooling times requires an accurate description of the dynamical friction force. The proposed RHIC cooler will require {approx}55 MeV electrons, which must be obtained from an RF linac, leading to very high transverse electron temperatures. A strong solenoid will be used to magnetize the electrons and suppress the transverse temperature, but the achievable magnetized cooling logarithm will not be large. In this paper, we explore the magnetized friction force for … more
Date: May 16, 2005
Creator: Fedotov, A. V.; Ben-Zvi, Ilan & Litvinenko, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SUPERCONDUCTING HELICAL SNAKE MAGNET FOR THE AGS.

Description: A superconducting helical magnet has been built for polarized proton acceleration in the Brookhaven AGS. This ''partial Snake'' magnet will help to reduce the loss of polarization of the beam due to machine resonances. It is a 3 T magnet some 1940 mm in magnetic length in which the dipole field rotates with a pitch of 0.2053 degrees/mm for 1154 mm in the center and a pitch of 0.3920 degrees/mm for 393 mm in each end. The coil cross-section is made of two slotted cylinders containing superconduc… more
Date: May 16, 2005
Creator: Willen, E.; Anerella, M.; Escallier, G.; Ganetis, G.; Ghosh, A.; Gupta, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of vertexing and lifetime triggers and a study of B(s) mixing using hadronic decays at D0

Description: The D0 detector underwent a major upgrade to maximize its ability to fully exploit Run II at the Fermilab Tevatron, the world's highest energy collider. The upgrade included a completely new central tracking system with an outer scintillating fiber tracker and an inner silicon vertex detector all within a 2T superconducting solenoid. This thesis describes the development of high level trigger algorithms including vertexing, impact parameter significance and invariant mass, that utilize tracks f… more
Date: March 1, 2005
Creator: Barnes, Christopher P.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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An Integral Method for Determining Induced Voltage in Time-Varying Wire Inductors

Description: This report documents the creation of software tools to model time-varying wire inductors. The class of inductors studied consists of arbitrary wire shapes in nonmagnetic material. When the wire structures are deformed, the inductance changes, and a voltage is induced. This voltage is of interest, for instance when the inductor is used to measure or sense a shockwave. An integral technique, which only requires integrating over the wire segments, is used to find the inductance at each time step,… more
Date: May 27, 2005
Creator: Fasenfest, B; White, D & Rockway, J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Systems Analysis for Modular Versus Multi-Beam HIF Drivers

Description: Previous modeling for HIF drivers concentrated on designs in which 100 or more beams are grouped in an array and accelerated through a common set of induction cores. The total beam energy required by the target is achieved by the combination of final ion energy, current per beam and number of beams. Economic scaling favors a large number of small ({approx}1 cm dia.) beams. An alternative architecture has now been investigated, which we refer to as a modular driver. In this case, the driver is s… more
Date: January 26, 2005
Creator: Meier, W. R. & Logan, B. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron Cooling of Rhic.

Description: We report progress on the R&D program for electron-cooling of the Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon at storage energy using 54 MeV electrons. The electron source will be a superconducting RF photocathode gun. The accelerator will be a superconducting energy recovery linac. The frequency of the accelerator is set at 703.75 MHz. The maximum electron bunch frequency is 9.38 MHz, with bunch charge of 20 nC. The R&D program has t… more
Date: May 16, 2005
Creator: Ben-Zvi, Ilan; Litvinenko, V.; Barton, D. & Al., Et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Progress on the Coupling Coil for the MICE Channel

Description: This report describes the progress on the coupling magnet for the international Muon Ionization Cooling Experiment (MICE). MICE consists of two cells of a SFOFO cooling channel that is similar to that studied in the level 2 study of a neutrino factory. The MICE RF coupling coil module (RFCC module) consists of a 1.56 m diameter superconducting solenoid, mounted around four cells of conventional 201.25 MHz closed RF cavities. This report discusses the progress that has been made on the supercond… more
Date: May 8, 2005
Creator: Green, M.A.; Li, D.; Virostek, S.P.; Lau, W.; Witte, H.; Yang,S.Q. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis of eddy current distributions in the CMS magnet yoke during the solenoid discharge

Description: Flux loops have been installed on selected segments of the magnetic flux return yoke of the 4 T superconducting coil of the Compact Muon Solenoid (CMS) detector under construction at CERN. Voltages induced in the loops during discharge of the solenoid will be sampled on-line during the entire discharge and integrated off-line to provide a measurement of the initial magnetic flux density in steel at the maximum field to an accuracy of a few percent. Although the discharge of the solenoid is rath… more
Date: January 1, 2005
Creator: Klyukhin, V. I.; Campi, D.; Cure, B.; Gaddi, A.; Gerwig, H.; Grillet, J. P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cryogenics for the MuCool Test Area (MTA)

Description: MuCool Test Area (MTA) is a complex of buildings at Fermi National Accelerator Laboratory, which are dedicated to operate components of a cooling cell to be used for Muon Collider and Neutrino Factory R&D. The long-term goal of this facility is to test ionization cooling principles by operating a 25-liter liquid hydrogen (LH{sub 2}) absorber embedded in a 5 Tesla superconducting solenoid magnet. The MTA solenoid magnet will be used with RF cavities exposed to a high intensity beam. Cryogens… more
Date: September 1, 2005
Creator: Darve, Christine; Norris, Barry; Pei, Liu-Jin & /Fermilab
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Failure Scenarios and Mitigations and for the BaBar Superconducting Solenoid

Description: The cryogenic department at the Stanford Linear Accelerator Center is responsible for the operation, troubleshooting, and upgrade of the 1.5 Tesla superconducting solenoid detector for the BABAR B-factory experiment. Events that disable the detector are rare but significantly impact the availability of the detector for physics research. As a result, a number of systems and procedures have been developed over time to minimize the downtime of the detector, for example improved control systems, im… more
Date: December 13, 2005
Creator: Thompson, EunJoo; Candia, A.; Craddock, W. W.; Racine, M. & Weisend, J. G., II
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solenoid-free Plasma Startup in NSTX using Coaxial Helicity Injection

Description: The favorable properties of the Spherical Torus (ST) arise from its very small aspect ratio. However, small aspect ratio devices have very restricted space for a substantial central solenoid. Thus methods for initiating the plasma current without relying on induction from a central solenoid are essential for the viability of the ST concept. Coaxial Helicity Injection (CHI) is a promising candidate for solenoid-free plasma startup in a ST. Recent experiments on the HIT-II ST at the University of… more
Date: January 3, 2005
Creator: Raman, Roger; Jarboe, Thomas R.; Bell, Michael G.; Mueller, Dennis; Nelson, Brian A.; LeBlanc, Benoit et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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RF-Based Accelerators for HEDP Research

Description: Accelerator-driven High-Energy Density Physics (HEDP) experiments require typically 1 nanosecond, 1 microcoulomb pulses of mass 20 ions accelerated to several MeV to produce eV-level excitations in thin targets, the warm dense matter regime. Traditionally the province of induction linacs, RF-based acceleration may be a viable alternative with recent breakthroughs in accelerating structures and high-field compact superconducting solenoids. A reference design for an RF-based accelerator for HEDP … more
Date: May 9, 2005
Creator: Staples, John W.; Sessler, Andrew; Keller, Roderich; Ostroumov,Petr & Chou, Weiren
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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U.S. Contributions to ITER

Description: The United States participates in the ITER project and program to enable the study of the science and technology of burning plasmas, a key programmatic element missing from the world fusion program. The 2003 U.S. decision to enter the ITER negotiations followed an extensive series of community and governmental reviews of the benefits, readiness, and approaches to the study of burning plasmas. This paper describes both the technical and the organizational preparations and plans for U.S. particip… more
Date: May 13, 2005
Creator: Sauthoff, Ned R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Liquid Cryogen Absorber for MICE*

Description: The Muon Ionization Cooling Experiment (MICE) will test ionization cooling of muons. In order to have effective ionization cooling, one must use an absorber that is made from a low-z material. The most effective low z materials for ionization cooling are hydrogen, helium, lithium hydride, lithium and beryllium, in that order. In order to measure the effect of material on cooling, several absorber materials must be used. This report describes a liquid-hydrogen absorber that is within a pair of s… more
Date: August 20, 2005
Creator: Baynham, D. E.; Bish, P.; Bradshaw, T. W.; Cummings, M. A.; Green, M. A.; Ishimoto, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Beam Dynamics Studies for a Laser Acceleration Experiment

Description: The NLC Test Accelerator (NLCTA) at SLAC was built to address various beam dynamics issues for the Next Linear Collider. An S-Band RF gun is being installed together with a large-angle extraction line at 60 MeV followed by a matching section, buncher and final focus for the laser acceleration experiment, E163. The laser-electron interaction area is followed by a broad range, high resolution spectrometer (HES) for electron bunch analysis. Another spectrometer at 6 MeV will be used for analysis o… more
Date: May 17, 2005
Creator: Colby, E.; Noble, R.; Palmer, D.; Siemann, R. & Spencer, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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