TITLE

The continued development of the Spallation Neutron Source external antenna H- ion source

AUTHOR(S)
Welton, R. F.; Carmichael, J.; Desai, N. J.; Fuga, R.; Goulding, R. H.; Han, B.; Kang, Y.; Lee, S. W.; Murray, S. N.; Pennisi, T.; Potter, K. G.; Santana, M.; Stockli, M. P.
PUB. DATE
February 2010
SOURCE
Review of Scientific Instruments;Feb2010, Vol. 81 Issue 2, p02A727
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The U.S. Spallation Neutron Source (SNS) is an accelerator-based, pulsed neutron-scattering facility, currently in the process of ramping up neutron production. In order to ensure that the SNS will meet its operational commitments as well as provide for future facility upgrades with high reliability, we are developing a rf-driven, H- ion source based on a water-cooled, ceramic aluminum nitride (AlN) plasma chamber. To date, early versions of this source have delivered up to 42 mA to the SNS front end and unanalyzed beam currents up to ∼100 mA (60 Hz, 1 ms) to the ion source test stand. This source was operated on the SNS accelerator from February to April 2009 and produced ∼35 mA (beam current required by the ramp up plan) with availability of ∼97%. During this run several ion source failures identified reliability issues, which must be addressed before the source re-enters production: plasma ignition, antenna lifetime, magnet cooling, and cooling jacket integrity. This report discusses these issues, details proposed engineering solutions, and notes progress to date.
ACCESSION #
48352475

 

Related Articles

  • Integrated target-ion source unit for on-line production of radioactive short-lived isotopes. Panteleev, V. N.; Barzakh, A. E.; Fedorov, D. V.; Menna, M.; Moroz, F. V.; Volkov, Yu. M. // European Physical Journal A -- Hadrons & Nuclei;Oct2005, Vol. 26 Issue 1, p147 

    A new version of integrated target-ion source unit (ionising target) has been developed for the on-line production of radioactive single-charged ions. The target is able to withstand temperatures up to 2500 °C and acts also as an ion source of the surface and laser ionisation. Off-line and...

  • Neutrinos at the Spallation Neutron Source. Scholberg, K. // AIP Conference Proceedings;12/21/2007, Vol. 967 Issue 1, p72 

    The Spallation Neutron Source at Oak Ridge will provide an intense source of neutrinos in the tens of MeV range, which nicely overlaps with the supernova neutrino energy range. I will describe the Neutrinos at the SNS (νSNS) program planned to exploit this high power, high quality source for...

  • Exclusive Spallation Measurements on 56Fe+p with the SPALADIN setup. Pietri, S.; Böhmer, M.; Lafriakh, A.; Le Gentil, E.; Aumann, T.; Bacri, C.-O.; Benlliure, J.; Boudard, A.; Casarejos, E.; Combet, M.; Ducret, J.-E.; Fernandez-Ordoñez, M.; Gernhäuser, R.; Johansson, H.; Kelic, A.; Kezzar, K.; Krücken, R.; Kurtukian-Nieto, T.; Le Fèvre, A.; Leray, S. // AIP Conference Proceedings;2006, Vol. 831 Issue 1, p535 

    First coincidence data on the 56Fe+p reaction at 1 A.GeV in inverse kinematics obtained with the SPALADIN setup are presented. Data on charge correlations of cluster emissions occurring in the spallation reaction are shown and compared to spallation codes with the aim of discriminating between...

  • Mercury Cavitation Phenomenon in Pulsed Spallation Neutron Sources. Futakawa, Masatoshi; Naoe, Takashi; Kawai, Masayoshi // AIP Conference Proceedings;6/24/2008, Vol. 1022 Issue 1, p197 

    Innovative researches will be performed at Materials & Life Science Experimental Facility in J-PARC, in which a mercury target system will be installed as MW-class pulse spallation neutron sources. Proton beams will be injected into mercury target to induce the spallation reaction. At the moment...

  • Isotope ratios and isoscaling of spallation products in p(1GeV) + A reactions. Andronenko, M. N.; Andronenko, L. N.; Neubert, W. // European Physical Journal A -- Hadrons & Nuclei;Jan2007, Vol. 31 Issue 1, p125 

    An analysis of experimental yields concerning isotopically resolved spallation products from 1GeV-proton nucleus interactions with targets from Fe to Cs is presented. It was found that the yield ratios of isotopes classified by the difference of the neutron numbers are compatible with relations...

  • Scattered countries revive hope for European Spallation Source. Feder, Toni // Physics Today;Jun2008, Vol. 61 Issue 6, p22 

    The article reports on the plans of countries involved in the previous planning of the European Spallation Source (ESS) to pursue the program. It is mentioned that Sweden is collaborating with Spain and Hungary for the ESS to lobby the revival of the project. Moreover, it is stated that the...

  • Chapter 3: SPALLATION TARGETS FOR ADS APPLICATIONS.  // OECD Papers;2005, Vol. 5 Issue 7, p65 

    The article discusses the technical and design problems for the spallation targets used for an accelerator driven system (ADS) for nuclear waste transmutation. Design issues, ongoing design projects and support programs, spallation target technology, target performance, and thermal and...

  • Importance of Nuclear Data for Windowless Spallation Target Design. Aoust, Th.; Malambu, E. M.; Abderrahim, H. Aït // AIP Conference Proceedings;2005, Vol. 769 Issue 1, p1572 

    The development of a transmutation program using ADS requires accurate spallation simulation tools in order to design such systems. All the spallation simulation tools couple intranuclear cascade and evaporation models. We report here the results of a comparison between various theoretical...

  • Volatile Elements Production Rates in a 1.4-GeV Proton-Irradiated Molten Lead-Bismuth Target. Zanini, L.; Andersson, M.; Everaerts, P.; Fallot, M.; Frånberg, H.; Gröschel, F.; Jost, C.; Kirchner, T.; Kojima, Y.; Köster, U.; Lebenhaft, J.; Manfrin, E.; Pitcher, E.; Ravn, H.; Tall, Y.; Wagner, W.; Wohlmuther, M. // AIP Conference Proceedings;2005, Vol. 769 Issue 1, p1525 

    Production rates of volatile elements following the spallation reaction of 1.4-GeV protons on a liquid Pb/Bi target have been measured. The experiment was performed at the ISOLDE facility at CERN. These data are of interest for the development of targets for accelerator-driven systems such as...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics