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A short model excitation of an asymmetric force free superconducting transmission line magnet

Description: A short model of asymmetric force free magnet with single beam aperture was tested at Fermilab together with the excitation test of VLHC transmission line magnet. The design concept of asymmetric force free superconducting magnet was verified by the test. The testing reached up to 104 kA current and no indication of force imbalance was observed. Since the model magnet length was only 10cm, A 0.75m model was constructed and tested at KEK with low current to ensure the validity of the design. The… more
Date: September 1, 2005
Creator: Wake, M.; Sato, H.; Carcagno, R.; Foster, W.; Hays, S.; Kashikhin, V. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mechanical Analysis of the Nb3Sn Dipole Magnet HD1

Description: The Superconducting Magnet Group at Lawrence Berkeley National Laboratory (LBNL) has recently fabricated and tested HD1, a Nb3Sn dipole magnet. The magnet reached a 16 T field, and exhibited training quenches in the end regions and in the straight section. After the test, HD1 was disassembled and inspected, and a detailed 3D finite element mechanical analysis was done to investigate for possible quench triggers. The study led to minor modifications to mechanical structure and assembly procedure… more
Date: June 1, 2005
Creator: Ferracin, Paolo; Bartlett, Scott E.; Caspi, Shlomo; Dietderich, Daniel R.; Gourlay, Steve A.; Hannaford, Charles R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of a large aperture Nb3Sn racetrack quadrupolemagnet

Description: The U.S. LHC Accelerator Research Program (LARP), a collaboration between BNL, FNAL, LBNL, and SLAC, has among its major objectives the development of advanced magnet technology for an LHC luminosity upgrade. The LBNL Superconducting Magnet Group supports this program with a broad effort involving design studies, Nb{sub 3}Sn conductor development, mechanical models, and basic prototypes. This paper describes the development of a large aperture Nb{sub 3}Sn racetrack quadrupole magnet using four … more
Date: April 14, 2005
Creator: Ferracin, Paolo; Bartlett, Scott E.; Caspi, Shlomo; Dietderich,Daniel R.; Gourlay, Steven A.; Hannaford, Charles R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of a Large Aperture Nb3Sn Racetrack Quadrupole Magnet

Description: The U.S. LHC Accelerator Research Program (LARP), a collaboration between BNL, FNAL, LBNL, and SLAC, has among its major objectives the development of advanced magnet technology for an LHC luminosity upgrade. The LBNL Superconducting Magnet Group supports this program with a broad effort involving design studies, Nb{sub 3}Sn conductor development, mechanical models, and basic prototypes. This paper describes the development of a large aperture Nb{sub 3}Sn racetrack quadrupole magnet using four … more
Date: June 1, 2005
Creator: Ferracin, Paolo; Bartlett, Scott E.; Caspi, Shlomo; Dietderich, Daniel R.; Gourlay, Steve A.; Hannaford, Charles R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advances in the understanding and operations of superconducting colliders

Description: Chromaticity drift during injection is a well-known phenomenon in superconducting colliders, such as the Tevatron, HERA and RHIC. Imperfect compensation of the drift effects can contribute to beam loss and emittance growth. It is caused by the drift of the sextupole component in the dipole magnets due to current redistribution in its superconducting coils. Recently extensive studies of chromaticity drift were conducted at the Tevatron, aiming at the improvement of the luminosity performance in … more
Date: May 1, 2005
Creator: Annala, G.; Bauer, P.; Bottura, L.; Martens, M. A.; Sammut, N.; Velev, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies of the chromaticity, tune and coupling drift in the Tevatron

Description: Chromaticity drift is a well-known and more or less well-understood phenomenon in superconducting colliders such as the Tevatron. Less known is the effect of tune and coupling drift, also observed in the Tevatron during injection. These effects are caused by field drifts in the superconducting magnets. Controlling the behavior of the tune, coupling, and chromaticity is an important part of reducing beam loss at injection and at the start of the Tevatron ramp. In this context we conducted severa… more
Date: May 1, 2005
Creator: Martens, Michael A.; Annala, Jerry; Bauer, Pierre; Shiltsev, Vladimir & Velev, Gueorgui
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Performance analysis of HD1: a 16 Tesla Nb3Sn dipole Magnet

Description: The Superconducting Magnet Group at Lawrence Berkeley National Laboratory (LBNL) has been developing technology for high field accelerator magnets from brittle conductors. HD1 is a single bore block dipole magnet using two, double-layer Nb{sub 3}Sn flat racetrack coils. The magnet was tested in October 2003 and reached a bore peak field of 16 T (94.5% of short sample). The average quench current plateau appeared to be limited by 'stick slip' conductor motions. Diagnostics recorded quench origin… more
Date: June 1, 2005
Creator: Mattafirri, S.; Bartlett, S. E.; Bish, P. A.; Caspi, S.; Dietderich, D. R.; Ferracin, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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How the Performance of a Superconducting Magnet Is Affected by the Connection Between a Small Cooler and the Magnet

Description: As low temperature cryocoolers become more frequently used to cool superconducting magnets, it becomes increasingly apparent that the connection between the cooler and the magnet has an effect on the design and performance of the magnet. In general, the use of small coolers can be considered in two different temperature ranges; (1) from 3.8 to 4.8 K for magnet fabricated with LTS conductor and (2) from 18 to 35 K for magnets fabricated using HTS conductor. In general, both temperature ranges ca… more
Date: September 8, 2005
Creator: Green, Michael A.
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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The Magnet Fiducialization Problem

Description: Magnets in accelerator beamlines have, for the most part, been made with ferromagnetic poles and traditionally these pole surfaces have been used as the references for external alignment aids, tooling balls, CERN sockets and so on. This practice assumes that the magnetic field is well-defined by the poles (which fails in the presence of saturation). It also fails in the case of superconducting magnets, which have no tangible poles. Other difficulties are well-known to those working in the field… more
Date: August 12, 2005
Creator: Harvey, A.
Item Type: Refine your search to only Report
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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Livermore's 2004 R&D 100 Awards: Magnetically Levitated Train Takes Flight

Description: the 1960s, transportation industry planners have sought an energy-efficient design for a train that can glide through air at speeds up to 500 kilometers per hour. This type of train, called a magnetically levitated (maglev) train, is thought to be a viable solution to meet the nation's growing need for intercity and urban transportation networks. However, despite some promising developments, unresolved concerns with the operation and safety of maglev trains has prevented the transition from dem… more
Date: September 20, 2005
Creator: Hazi, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cryostat with Foil and MLI

Description: Induction cores are used to accelerate heavy ion beam array, which are built around the outer diameter of the cryostat housing the superconducting quadruple array. Compact cryostat is highly desirable to reduce the cost of the induction cores. Recent experiences in fabrication of a cryostat for single beam transport revealed that it is possible to reduce the spacing in the cryostat vacuum jacket by using low-emissivity thermal insulation material instead of conventional MLI. However, it is labo… more
Date: October 6, 2005
Creator: Hwang, Peter K.F. & Gung, Chen-yu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fabrication of Chemically Doped, High Upper Critical Field Magnesium Diboride Superconducting Wires

Description: Controlled chemical doping of magnesium diboride (MgB2) has been shown to substantially improve its superconducting properties to the levels required for high field magnets, but the doping is difficult to accomplish through the usual route of solid state reaction and diffusion. Further, superconducting cables of MgB2 are difficult to fabricate because of the friable nature of the material. In this Phase I STTR project, doped and undoped boron fibers were made by chemical vapor deposition (CVD).… more
Date: October 13, 2005
Creator: Marzik, James, V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Optimized Superconducting Quadrupole Arrays for Multiple Beam Transport

Description: This research project advanced the development of reliable, cost-effective arrays of superconducting quadrupole magnets for use in multi-beam inertial fusion accelerators. The field in each array cell must be identical and meet stringent requirements for field quality and strength. An optimized compact array design using flat double-layer pancake coils was developed. Analytical studies of edge termination methods showed that it is feasible to meet the requirements for field uniformity in all ce… more
Date: September 20, 2005
Creator: Meinke, Rainer B.; Goodzeit, Carl L. & Ball, Millicent J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Beta function measurement in the Tevatron using quadrupole gradient modulation

Description: Early in Run2, there was an effort to compare the different emittance measurements in the Tevatron (flying wires and synchrotron light) and understand the origin of the observed differences. To measure the beta function at a few key locations near the instruments, air-core quadrupoles were installed. By modulating the gradient of these magnets and measuring the effect on the tune, the lattice parameters can be extracted. Initially, the results seem to disagree with other methods. At the time, t… more
Date: May 1, 2005
Creator: Jansson, A.; Lebrun, P.; Volk, J. T. & /Fermilab
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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TEST RESULTS FOR LHC INSERTION REGION DEPOLE MAGNETS.

Description: The Superconducting Magnet Division at Brookhaven National Laboratory (BNL) has made 20 insertion region dipoles for the Large Hadron Collider (LHC) at CERN. These 9.45 m-long, 8 cm aperture magnets have the same coil design as the arc dipoles now operating in the Relativistic Heavy Ion Collider (RHIC) at BNL and are of single aperture, twin aperture, and double cold mass configurations. They are required to produce fields up to 4.14 T for operation at 7.56 TeV. Eighteen of these magnets have b… more
Date: May 16, 2005
Creator: Muratore, J.; Jain, A.; Anerella, M.; Cossolino, J. & AL., ET
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
open access

COMPACT SUPERCONDUCTING FINAL FOCUS MAGNET OPTIONS FOR THE ILC.

Description: The QD0 quadrupole, the final focus magnet closest to the Interaction Point (IP) for the ILC 20 m crossing angle layout, must provide strong focusing yet be adjustable to accommodate collision energy changes for energy scans and low energy calibration running. It must also be compact to allow disrupted beam and Beamstrahlung coming from the IP to pass outside into an independent instrumented beam line that leads to a high-power beam absorber. In designing QD0 we take advantage of recent BNZ, ex… more
Date: May 16, 2005
Creator: Parker, B.; Anerella, M.; Escallier, J.; Harrison, M.; He, P.; Jain, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Serpentine Coil Topology for BNL Direct Wind Superconducting Magnets.

Description: Serpentine winding, a recent innovation developed at BNL for direct winding superconducting magnets, allows winding a coil layer of arbitrary multipolarity in one continuous winding process and greatly simplifies magnet design and production compared to the planar patterns used before. Serpentine windings were used for the BEPC-II Upgrade and JPARC magnets and are proposed to make compact final focus magnets for the EC. Serpentine patterns exhibit a direct connection between 2D body harmonics a… more
Date: May 16, 2005
Creator: Parker, B. & Escallier, J.
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
open access

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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Effect of high solenoidal magnetic fields on breakdown voltages of high vacuum 805 MHz cavities

Description: There is an on going international collaboration studying the feasibility and cost of building a muon collider or neutrino factory [1,2]. An important aspect of this study is the full understanding of ionization cooling of muons by many orders of magnitude for the collider case. An important muon ionization cooling experiment, MICE [3], has been proposed to demonstrate and validate the technology that could be used for cooling. Ionization cooling is accomplished by passing a high-emittance muon… more
Date: October 1, 2005
Creator: Moretti, A.; Bross, A.; Geer, S.; Qian, Z.; Norem, J.; Li, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mechanical analysis of the Nb3Sn dipole magnet HD1

Description: The Superconducting Magnet Group at Lawrence Berkeley National Laboratory (LBNL) has recently fabricated and tested HD1, a Nb{sub 3}Sn dipole magnet. The magnet reached a 16 T field, and exhibited training quenches in the end regions and in the straight section. After the test, HD1 was disassembled and inspected, and a detailed 3D finite element mechanical analysis was done to investigate for possible quench triggers. The study led to minor modifications to mechanical structure and assembly pro… more
Date: April 14, 2005
Creator: Ferracin, Paolo; Bartlett, Scott E.; Caspi, Shlomo; Dietderich,Daniel R.; Gourlay, Steve A.; Hannaford, Carles R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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