Recent developments for high-intensity proton linacs

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High-intensity proton linacs are being proposed for new projects around the world, especially for tritium production, and for pulsed spallation neutron sources. Typical requirements for these linacs include peak beam current of about 100 mA, and final energies of 1 GeV and higher, APT, a tritium production linac, requires cw operation to obtain sufficient average tritium production linac, requires cw operation to obtain sufficient average beam power, and H{sup +} ion sources appear capable of providing the required current and emittances. The pulsed spallation neutron source requires a linac as an injector to one or more accumulator rings, and favors ... continued below

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8 p.

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Wangler, T.P.; Garnett, R.W.; Gray, E.R. & Nath, S. April 1, 1996.

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Description

High-intensity proton linacs are being proposed for new projects around the world, especially for tritium production, and for pulsed spallation neutron sources. Typical requirements for these linacs include peak beam current of about 100 mA, and final energies of 1 GeV and higher, APT, a tritium production linac, requires cw operation to obtain sufficient average tritium production linac, requires cw operation to obtain sufficient average beam power, and H{sup +} ion sources appear capable of providing the required current and emittances. The pulsed spallation neutron source requires a linac as an injector to one or more accumulator rings, and favors the use of an H{sup minus} beam to allow charge-exchange injection into the rings. For both applications high availability is demanded; the fraction of scheduled beam time for actual production must be 75% or more. Such a high availability requires low beam-loss to avoid radioactivation of the accelerator, and to allow hands-on maintenance that will keep the mean repair and maintenance times short. To keep the accelerator activation sufficiently low, the beam loss should not exceed about 0.1 to 1.0 nA/m, except perhaps for a few localized places, where special design adaptations could be made. The requirement of such small beam losses at such a high intensity presents a new beam physics challenge. This challenge will require greater understanding of the beam distribution, including the low- density beam halo, which is believed to be responsible for most of the beam losses. Furthermore, it will be necessary to choose the apertures so the beam losses will be acceptably low, and because large aperture size is generally accompanied by an economic penalty resulting from reduced power efficiency, an optimized choice of the aperture will be desirable.

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8 p.

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INIS; OSTI as DE96009094

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  • Days of study at Saturn, Ramatuelle (France), 29 Jan - 2 Feb 1996

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  • Other: DE96009094
  • Report No.: LA-UR--96-1043
  • Report No.: CONF-960186--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 231223
  • Archival Resource Key: ark:/67531/metadc666172

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  • April 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 26, 2016, 4:02 p.m.

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Wangler, T.P.; Garnett, R.W.; Gray, E.R. & Nath, S. Recent developments for high-intensity proton linacs, article, April 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc666172/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.