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Laser ion source for low charge heavy ion beams

Description: For heavy ion inertial fusion application, a combination of a laser ion source and direct plasma injection scheme into an RFQ is proposed. The combination might provide more than 100 mA of singly charged heavy ion beam from a single laser shot. A planned feasibility test with moderate current is also discussed.
Date: August 3, 2008
Creator: Okamura, M.; Pikin, A.; Zajic, V.; Kanesue, T. & Tamura, J.
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Partner: UNT Libraries Government Documents Department
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Sheath Physics and Boundary Conditions for Edge Plasmas

Description: The boundary conditions of mass, momentum, energy, and charge appropriate for fluid formulations of edge plasmas are surveyed. We re-visit the classic problem of 1-dimensional flow, and note that the ''Bohm sheath criterion'' is requirement of connectivity of the interior plasma with the external world, not the result of termination of the plasma by a wall. We show that the nature of the interior plasma solution is intrinsically different for ion sources that inject above and below the electron… more
Date: September 3, 2003
Creator: Cohen, R. H. & Ryutov, D. D.
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Partner: UNT Libraries Government Documents Department
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Progress report on VENUS

Description: The construction of VENUS, a next generation superconducting Electron Cyclotron Resonance ion source designed to operate at 28 GHz, is complete. The cryostat including the superconducting magnet assembly was delivered in September 2001. During acceptance tests, the superconducting magnets produced an axial magnetic field strength of 4T at injection, 3T at extraction, and a radial field strength of 2T at the plasma chamber wall without any quenches. These fields are sufficient for optimum operat… more
Date: September 3, 2002
Creator: Leitner, Matthaeus A.; Leitner, Daniela; Abbott, Steve R.; Taylor, Clyde E. & Lyneis, Claude
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Partner: UNT Libraries Government Documents Department
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Production of an Accelerated Oxygen-14 Beam

Description: BEARS is an ongoing project to provide a light-ion radioactive-beam capability at the 88-Inch Cyclotron at LBNL. Light radioactive isotopes are produced at a 10 MeV proton medical cyclotron, transported 350 m via a high-speed gas transport capillary, cryogenically separated, and injected into the 88-Inch Cyclotron's ion source. The first radioactive beam successfully accelerated was Carbon-11 and beams of intensity more than 108 ions/sec have been utilized for experiments. Development of Oxygen… more
Date: May 3, 2002
Creator: Powell, James; O'Neil, James P. & Cerny, Joseph
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Partner: UNT Libraries Government Documents Department
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Upgrading the Sns Compressor Ring to 3 Mw.

Description: The initial performance goal for the SNS compressor ring is 1.4 MW with 1.0 GeV linac beam. During the design phase many considerations and provisions have been made to allow progressive increase in power level of the ring, ultimately to 3.0 MW and beyond after years of improvements. The most important provision for future higher power operation is an increase in beam energy from 1.0 to 1.3 GeV. Other possible upgrades covered in this report include ion source current, new stripper foil materia… more
Date: June 3, 2002
Creator: Weng, W. T.; Blaskiewicz, M.; Fedotov, A.; Lee, Y. Y.; Raparia, D.; Wei, J. et al.
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Partner: UNT Libraries Government Documents Department
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Experimental study of interactions of highly charged ions with atoms at keV energies. Progress report, April 16, 1994--August 1, 1994

Description: The objective of this program is the experimental study of interactions of low energy, highly charged ions with other atomic species. The Cornell superconducting solenoid, cryogenic electron beam ion source CEBIS designed and built in our laboratory is the major piece of apparatus used in these investigations. This progress report describes the work accomplished during the period April 16, 1994 and August 1, 1994. This includes both finished experiments and preparatory work for planned future e… more
Date: August 3, 1994
Creator: Kostroun, V. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heavy ion cocktail beams at the 88 inch Cyclotron

Description: Cyclotrons in combination with ECR ion sources provide the ability to accelerate ''cocktails'' of ions. A cocktail is a mixture of ions of near-identical mass-to-charge (m/q) ratio. The different ions cannot be separated by the injector mass-analyzing magnet and are tuned out of the ion source together. The cyclotron then is utilized as a mass analyzer by shifting the accelerating frequency. This concept was developed soon after the first ECR ion source became operational at the 88-Inch Cyclotr… more
Date: September 3, 2002
Creator: Leitner, Daniela; McMahan, Margaret A.; Argento, David; Gimpel, Thomas; Guy, Aran; Morel, James et al.
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Partner: UNT Libraries Government Documents Department
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The Heavy Ion Fusion Program in the U.S.A.

Description: Inertial fusion energy research has enjoyed increased interest and funding. This has allowed expanded programs in target design, target fabrication, fusion chamber research, target injection and tracking, and accelerator research. The target design effort examines ways to minimize the beam power and energy and increase the allowable focal spot size while preserving target gain. Chamber research for heavy ion fusion emphasizes the use of thick liquid walls to serve as the coolant, breed tritium,… more
Date: October 3, 2000
Creator: Bangerter, R. O.; Davidson, R. C.; Herrmannsfeldt, W. B.; Lindl, J. D.; Logan, B. G. & Meier, W. R.
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Partner: UNT Libraries Government Documents Department
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Hydrogen vibrational population distributions and negative ion generation in tandem high-density hydrogen discharges

Description: The tandem high-density hydrogen negative-ion-source system is optimized to identify the largest possible ion concentrations and extracted ion currents. The optimization includes varying the length of the second chamber, varying neutral gas and electron densities, and varying the ratio of atomic to molecular density. Vibrational excitation occurs via high-energy electron excitation (E-V process) and H/sub 2//sup +/ surface neutralization (s-V process). These processes are considered separately … more
Date: December 3, 1984
Creator: Hiskes, J. R.; Karo, A. M. & Willmann, P. A.
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Partner: UNT Libraries Government Documents Department
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