Download or read book Commissioning of the SNS Front end Systems at Berkeley Lab written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Construction of a 2.5-MeV linac injector, the Front-End (FE) for the Spallation Neutron Source (SNS) project, was completed in the spring of 2002. Of the major FE subsystems, the rf-driven H- ion source, the electrostatic LEBT, and the first of four RFQ modules had been commissioned by the spring of 2001, and commissioning of the remaining RFQ modules as well as the full system including the elaborate MEBT was carried out in Jan. through May, 2002. The Front End will be shipped to Oak Ridge, starting in June, 2002, and re-commissioned after installation at the SNS site. This paper gives an overview of FE major design features and experimental results obtained during the commissioning process at LBNL.

Download or read book Results of the SNS Front End Commissioning at Berkeley Lab written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Front-End Systems (FES) for the Spallation Neutron Source (SNS) project comprise an rf-driven H− ion source, an electrostatic 2-lens LEBT, a 2.5 MeV RFQ, followed by a 14-quadrupole, 4-rebuncher MEBT including traveling-wave fast choppers. The nominal 2.5 MeV H− beam has a current of 38 mA at a repetition rate of 60 Hz and 1 ms pulse length, for a macro duty-factor of 6%, and is chopped at a rate of approximately 1 MHz with a mini duty-factor of 68%. The normalized rms beam emittance at the MEBT exit, matching the first tank of a 402.5 MHz Alvarez linac, is measured to be approximately 0.3 [pi] mm mrad. Diagnostic elements include wire scanners, BPMs, fast current monitors, a slit-harp emittance device and RFQ field monitoring probes. The results of the beam commissioning and the operation of the RFQ and diagnostic instrumentation are reported. The entire FES was shut down at LBNL at the end of May 2002 and will be recommissioned at ORNL prior to installation of the drift-tube linac.

Download or read book Berkeley Lab Research Review written by and published by . This book was released on 1996 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Production and Neutralization of Negative Ions and Beams written by Joseph D. Sherman and published by American Institute of Physics. This book was released on 2005-04-20 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This symposium addresses all aspects of H- and D- sources, the formation of negative hydrogen and deuterium beams from these sources, and their beam transport properties. The discussion includes both the latest theoretical and experimental work in these areas. The negative ion sources are multicusp, Penning, magnetron, rf (1-13 MHz), surface converter, microwave/ECR (GHz frequency), and polarized source types. Experimental work also includes beam chopping, space-charge lenses, optimized negative ion extraction systems, and beam diagnostics. The negative ion production mechanisms are volume (pure hydrogen or deuterium discharge) and surface production using cesium or other alkali metal to catalyze negative ion production. Theoretical analyses include plasma chemistry, particle-in-cell modeling, and H-/D- extraction physics simulations. The main applications for H- sources are in high-energy neutral beam injectors for fusion reactors and H- sources for charge exchange injection into synchrotrons or spallation neutron source storage rings.

Download or read book Progress with the SNS Front end Systems written by and published by . This book was released on 2001 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Front-End Systems (FES) of the Spallation Neutron Source (SNS) project have been described in detail elsewhere [1]. They comprise an rf-driven H− ion source, electrostatic LEBT, four-vane RFQ, and an elaborate MEBT. These systems are planned to be delivered to the SNS facility in Oak Ridge in June 2002. This paper discusses the latest design features, the status of development work, component fabrication and procurements, and experimental results with the first commissioned beamline elements.

Download or read book Production and Neutralization of Negative Ions and Beams written by Martin P. Stockli and published by American Institute of Physics. This book was released on 2002-10-24 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The symposium included 20 formal presentations on recent accomplishments in research and development for the production and neutralization of negative ions and beams. Topics include progress in technical developments and experiences, diagnostic developments, as well as in improved understanding through modeling and theoretical developments. For the first time, a simple, physics-based theoretical treatment was presented to properly model the ion extraction from negative ion sources. In addition, a method was presented that can accurately estimate the rms emittance from measured distributions. The proceedings contain all 20 presentations, written by 60 authors and co-authors, involving 21 institutions worldwide. All papers were peer reviewed.

Download or read book Negative Ions Beams and Sources written by Elizabeth Surrey and published by American Institute of Physics. This book was released on 2009-04-03 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: All papers have been peer-reviewed. The Symposium covers all aspects of negative ion production in plasma sources, their extraction into particle beams and subsequent transport, neutralization and exploitation. It is of interest to researchers in plasma physics, particle accelerators and fusion. It is the only international symposium dedicated to negative ion sources and beams.

Download or read book 107 1 Hearings Energy and Water Development Appropriations for 2002 Part 4 2001 written by and published by . This book was released on 2001 with total page 1476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 107 2 Hearings Energy and Water Development Appropriations For 2003 Part 4 2002 written by and published by . This book was released on 2002 with total page 1512 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Intensity and High Brightness Hadron Beams written by Weiren Chou and published by American Institute of Physics. This book was released on 2002-11-20 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 20th ICFA Advanced Beam Dynamics Workshop took place from April 8 to 12, 2002 at Fermilab, co-sponsored by Fermilab and KEK. The theme of this workshop was "High Intensity and High Brightness Hadron Beams". The workshop covered a broad range of topics associated with such beams, including reviews of the performance of existing high-intensity hadron machines, overviews of planned high-intensity hadron sources and projects, presentations on accelerator physics issues, technical systems designs, and applications of these beams in high energy physics, nuclear physics, heavy ion fusion, medicine, industry, and other fields.

Download or read book Energy and Water Development Appropriations for 2002 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 2001 with total page 1520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy and Water Development Appropriations for 2002 Department of Energy fiscal year 2002 budget justifications written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 2001 with total page 3046 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy and Water Development Appropriations for 2003 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 2002 with total page 2974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design Operational Experiences and Beam Results Obtained with the SNS H Ion Source and LEBT at Berkeley Lab written by and published by . This book was released on 2002 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ion source and Low-Energy Transport (LEBT) system that will provide H− ion beams to the Spallation Neutron Source (SNS)** Front End and the accelerator chain have been developed into a mature unit that fully satisfies the operational requirements through the commissioning and early operating phases of SNS. Compared to the early R & D version, many features of the ion source have been improved, and reliable operation at 6% duty factor has been achieved producing beam currents in the 35-mA range and above. LEBT operation proved that the purely electrostatic focusing principle is well suited to inject the ion beam into the RFQ accelerator, including the steering and pre-chopping functions. This paper will discuss the latest design features of the ion source and LEBT, give performance data for the integrated system, and report on commissioning results obtained with the SNS RFQ and Medium-Energy Beam Transport (MEBT) system. Prospects for further improvements will be outlined in concluding remarks.

Download or read book Energy and Water Development Appropriations for 2003 Department of Energy National Nuclear Security Administration Power Marketing Administrations written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 2002 with total page 2986 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy and Water Development Appropriations for 2001 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 2000 with total page 3154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy and Water Development Appropriations for 2001 Department of Energy fiscal year 2001 budget justifications written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 2000 with total page 3160 pages. Available in PDF, EPUB and Kindle. Book excerpt: